Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals
We present results of detailed paleomagnetic investigations on deep!sea cores from sediment drifts located along the Pacific continental margin of the Antarctic Peninsula. High!resolution magnetic measurements on u channel samples provide detailed age models for three cores collected from drift 7, w...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2011
|
Subjects: | |
Online Access: | http://hdl.handle.net/2122/7047 https://doi.org/10.1029/2010JB007952 |
id |
ftingv:oai:www.earth-prints.org:2122/7047 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
topic |
Antarctic Peninsula Pacific margin sediment drift late Pleistocene Mineral magnetism relative palaeointensity 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.09. Environmental magnetism |
spellingShingle |
Antarctic Peninsula Pacific margin sediment drift late Pleistocene Mineral magnetism relative palaeointensity 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.09. Environmental magnetism Venuti, A. Florindo, F. Caburlotto, A. Hounslow, M. W. Hillenbrand, C.-D. Strada, E. Talarico, F. M. Cavallo, A. Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals |
topic_facet |
Antarctic Peninsula Pacific margin sediment drift late Pleistocene Mineral magnetism relative palaeointensity 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.09. Environmental magnetism |
description |
We present results of detailed paleomagnetic investigations on deep!sea cores from sediment drifts located along the Pacific continental margin of the Antarctic Peninsula. High!resolution magnetic measurements on u channel samples provide detailed age models for three cores collected from drift 7, which document an age of 122 ka for the oldest sediments recovered near the drift crest at site SED!07 and a high sedimentation rate (11 cm/kyr) at site SED!12 located close to the Alexander Channel system. Low! and high!temperature magnetic measurements in conjunction with microscopic and mineralogic observations from drifts 4, 5 and 7 indicate that pseudosingle!domain detrital titanomagnetite (partially oxidized and with limited Ti substitution) is the dominant magnetic mineral in the drift sediments. The titanomagnetite occurs in two magnetic forms: (1) a low!coercivity form similar to laboratory!synthesized titanomagnetite and (2) a high!coercivity form (Bcr > 60 mT). These two forms vary in amount and stratigraphic distribution across the drifts. We did not find evidence for diagenetic magnetic iron sulfides as has been previously suggested for these drift deposits. The observed change of magnetic mineralogy in sediments deposited during Heinrich events on drift 7 appears to be related to warming periods, which temporarily modified the normal glacial transport pathways of glaciogenic detritus to and along the continental rise and thus resulted in deposition of sediments with a different provenance. Understanding this sediment provenance delivery signature at a wider spatial scale should provide information about ice sheet dynamics in West Antarctica over the last !100 kyr. Published B06104 2.2. Laboratorio di paleomagnetismo JCR Journal partially_open |
author2 |
Venuti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Caburlotto, A.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Sgonico, Italy Hounslow, M. W.; Lancaster Environment Centre, Lancaster University, Lancaster, UK Hillenbrand, C.-D.; British Antarctic Survey, Cambridge, UK Strada, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Talarico, F. M.; Dipartimento di Scienze della Terra, Università di Siena, Siena, Italy Cavallo, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Sgonico, Italy Lancaster Environment Centre, Lancaster University, Lancaster, UK British Antarctic Survey, Cambridge, UK Dipartimento di Scienze della Terra, Università di Siena, Siena, Italy Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia |
format |
Article in Journal/Newspaper |
author |
Venuti, A. Florindo, F. Caburlotto, A. Hounslow, M. W. Hillenbrand, C.-D. Strada, E. Talarico, F. M. Cavallo, A. |
author_facet |
Venuti, A. Florindo, F. Caburlotto, A. Hounslow, M. W. Hillenbrand, C.-D. Strada, E. Talarico, F. M. Cavallo, A. |
author_sort |
Venuti, A. |
title |
Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals |
title_short |
Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals |
title_full |
Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals |
title_fullStr |
Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals |
title_full_unstemmed |
Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals |
title_sort |
late quaternary sediments from deep!sea sediment drifts on the antarctic peninsula pacific margin: climatic control on provenance of minerals |
publisher |
American Geophysical Union |
publishDate |
2011 |
url |
http://hdl.handle.net/2122/7047 https://doi.org/10.1029/2010JB007952 |
geographic |
Antarctic Antarctic Peninsula Pacific The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Pacific The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet West Antarctica |
op_relation |
Journal of Geophysical Research /116 (2011) Acton, G. D., M. Okada, B. M. Clement, S. P. Lund, and T. Williams (2002), Paleomagnetic overprints in ocean sediment cores and their relationship to shear deformation caused by piston coring, J. Geophys. Res., 107(B4), 2067, doi:10.1029/2001JB000518. Amblas,D., R. Urgeles, M. Canals,A.M.Calafat,M.Rebesco,A.Camerlenghi, F. Estrada, M. De Batist, and J. E. Hughes!Clarke (2006), Relationship between continental rise development and palaeo!ice sheet dynamics, Northern Antarctic Peninsula Pacific margin, Quat. Sci. Rev., 25, 933–944, doi:10.1016/j.quascirev.2005.07.012. Anderson, R. F., S. Ali, L. I. Bradtmiller, S. H. H. Nielsen, M. Q. Fleisher, B. E. Anderson, and L. H. Burckle (2009), Wind!driven upwelling in the Southern Ocean and the deglacial rise in atmospheric CO2, Science, 323, 1443–1448, doi:10.1126/science.1167441. Barker, P. F., et al. (1999a), Proceedings of the Ocean Drilling Program Initial Reports, vol. 178, Ocean Drill. Program, College Station, Tex., doi:10.2973/odp.proc.ir.178.1999. Barker, P. F., P. J. Barrett, A. K. Cooper, and P. Huybrechts (1999b), Antarctic glacial history from numerical models and continental margin sediments, Palaeogeogr. Palaeoclimatol. Palaeoecol., 150, 247–267, doi:10.1016/S0031-0182(98)00224-7. Barker, P. F., A. Camerlenghi, G. D. Acton, and A. T. S. Ramsay (Eds.) (2002), Proceedings of the Ocean Drilling Program Scientific Results, vol. 178, Ocean Drill. Program, College Station, Tex., doi:10.2973/ odp.proc.sr.178.2002. Barker, P. F., G. M. Filippelli, F. Florindo, E. E. Martin, and H. D. Scher (2007), Onset and role of the Antarctic Circumpolar Current, Deep Sea Res., Part II, 54, 2388–2398, doi:10.1016/j.dsr2.2007.07.028. Brachfeld, S. A., Y. Guyodo, and G. D. Acton (2001), Data report: The magnetic mineral assemblage of hemipelagic drifts, ODP Site 1096, Proc. Ocean Drill. Program Sci. Results, 178, 1–10, doi:10.2973/odp. proc.sr.178.233.2001. Camerlenghi, A., A. Crise, C. J. Pudsey, E. Accerboni, R. Laterza, and M. Rebesco (1997a), Ten!month observation of the bottom current regime across a sediment drift of the Pacific margin of the Antarctic Peninsula, Antarct. Sci., 9, 426–433, doi:10.1017/S0954102097000552. Camerlenghi, A., M. Rebesco, and C. J. Pudsey (1997b), High resolution terrigenous sedimentary record of a sediment drift on the Antarctic Peninsula Pacific margin (Initial Results of the ‘SEDANO’ Program), in The Antarctic Region: Geological Evolution and Processes, edited by C. A. Ricci, pp. 705–710, Terra Antartica, Siena, Italy. Carter, L., I. N. McCave, and M. J. M. Williams (2008), Circulation and water masses of the Southern Ocean: A review, in Antarctic Climate Evolution, Dev. Earth Environ. Sci., vol. 8, pp. 85–114, edited by F. Florindo and M. Siegert, Elsevier, New York. Chapman, M. R., N. J. Shackleton, and J.!C. Duplessy (2000), Sea surface temperature variability during the last glacial!interglacial cycle: Assessing the magnitude and pattern of climate change in the North Atlantic, Palaeogeogr. Palaeoclimatol. Palaeoecol., 157, 1–25, doi:10.1016/ S0031-0182(99)00168-6. Cowan, E. A., C.!D. Hillenbrand, L. E. Hassler, and M. T. Ake (2008), Coarse!grained terrigenous sediment deposition on continental rise drifts: A record of Plio!Pleistocene glaciation on the Antarctic Peninsula, Palaeogeogr. Palaeoclimatol. Palaeoecol., 265, 275–291, doi:10.1016/ j.palaeo.2008.03.010. Day, R., M. Fuller, and V. A. Schmidt (1977), Hysteresis properties of titanomagnetites: Grain!size and compositional dependence, Phys. Earth Planet. Inter., 13, 260–267, doi:10.1016/0031-9201(77)90108-X. Dekkers, M. J. (1989), Magnetic properties of natural pyrrhotite. II. High! and low!temperature behaviour of Jrs and TRM as function of grain size, Phys. Earth Planet. Inter., 57, 266–283, doi:10.1016/0031-9201(89)90116-7. Dunlop, D. J. (2002), Theory and application of the Day plot (Mrs/Ms versus Hcr/Hc): 1. Theoretical curves and tests using titanomagnetite data, J. Geophys. Res., 107(B3), 2056, doi:10.1029/2001JB000486. EPICA Community Members (2006), One!to!one hemispheric coupling of glacial climate variability in Greenland and Antarctica, Nature, 444, 195–198, doi:10.1038/nature05301. Feinberg, J. M., G. R. Scott, P. R. Renne, and H.!R. Wenk (2005), Exsolved magnetite inclusions in silicates: Features determining their remanence behavior, Geology, 33, 513–516, doi:10.1130/G21290.1. Florindo, F., and L. Sagnotti (1995), Palaeomagnetism and rock magnetism in the upper Pliocene Valle Ricca (Rome, Italy) section, Geophys. J. Int., 123, 340–354, doi:10.1111/j.1365-246X.1995.tb06858.x. Florindo, F., and M. Siegert (Eds.) (2008), Antarctic Climate Evolution, Dev. Earth Environ. Sci., vol. 8, pp. 1–593, Elsevier, New York. Florindo, F., G. S. Wilson, A. P. Roberts, L. Sagnotti, and K. L. Verosub (2005), Magnetostratigraphic chronology of a Late Eocene to early Miocene glacimarine succession from the Victoria Land Basin, Ross Sea, Antarctica, Global Planet. Change, 45, 207–236, doi:10.1016/j.gloplacha. 2004.09.009. Florindo, F., D. B. Karner, F. Marra, P. R. Renne, A. P. Roberts, and R. Weaver (2007), Radioisotopic age constraints for Glacial Terminations IX and VII from aggradational sections of the Tiber River delta in Rome, Italy, Earth Planet. Sci. Lett., 256, 61–80, doi:10.1016/j. epsl.2007.01.014. Giorgetti, A., A. Crise, R. Laterza, L. Perini, M. Rebesco, and A. Camerlenghi (2003), Water masses and bottom boundary layer dynamics above a sediment drift of the Antarctic Peninsula Pacific Margin, Antarct. Sci., 15, 537–546, doi:10.1017/S0954102003001652. Guyodo, Y., and J.!P. Valet (1999), Global changes in intensity of the Earth’s magnetic field during the past 800 kyr, Nature, 399, 249–252, doi:10.1038/20420. Guyodo, Y., G. D. Acton, S. Brachfeld, and J. E. T. Channell (2001), A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101), Earth Planet. Sci. Lett., 191, 61–74, doi:10.1016/S0012-821X(01)00402-2. Harland, R., and C. J. Pudsey (1999), Dinoflagellate cysts from sediment traps deployed in the Bellingshausen, Weddell and Scotia seas, Antarctica, Mar. Micropaleontol., 37, 77–99, doi:10.1016/S0377-8398(99)00016-X. Harrison, R. J., and J. M. Feinberg (2008), FORCinel: An improved algorithm for calculating first!order reversal curve distributions using locally weighted regression smoothing, Geochem. Geophys. Geosyst., 9, Q05016, doi:10.1029/2008GC001987. Hawkes, I. J., M. W. Hounslow, C. J. Pudsey, and B. A. Maher (2003), Sediment dispersal pathways from the western Antarctic Peninsula during the last glacial period and the significance of temporal fluctuations in magnetic properties, Geophys. Res. Abstr., 5, 11,099. Heinrich, H. (1988), Origin and consequences of cycling ice rafting in the northeast Atlantic Ocean during the past 130,000 years, Quat. Res., 29, 142–152, doi:10.1016/0033-5894(88)90057-9. Hemming, S. R. (2004), Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint, Rev. Geophys., 42, RG1005, doi:10.1029/2003RG000128. Hernández!Molina, F. J., R. D. Larter, A. Maldonado, and J. Rodríguez! Fernández (2006), Evolution of the Antarctic Peninsula Pacific margin offshore from Adelaide Island since the late Miocene: An example of a glacial passive margin, Terra Antarct. Rep., 12, 81–90. Hillenbrand, C.!D., and W. Ehrmann (2002), Distribution of clay minerals in drift sediments on the continental rise west of the Antarctic Peninsula, ODP Leg 178, Sites 1095 and 1096, Proc. Ocean Drill. Program Sci. Results, 178, 1–29, doi:10.2973/odp.proc.sr.178.224.2001. Hillenbrand, C.!D., and W. Ehrmann (2005), Late Neogene to Quaternary environmental changes in the Antarctic Peninsula region: Evidence from drift sediments, Global Planet. Change, 45, 165–191, doi:10.1016/j. gloplacha.2004.09.006. Hillenbrand, C.!D., A. Camerlenghi, E. A. Cowan, F. J. Hernández!Molina, R. G. Lucchi, M. Rebesco, and G. Uenzelmann!Neben (2008a), The present and past bottom!current flow regime around the sediment drifts on the continental rise west of Antarctic Peninsula, Mar. Geol., 255, 55–63, doi:10.1016/j.margeo.2008.07.004. Hillenbrand, C.!D., S. G. Moreton, A. Caburlotto, C. J. Pudsey, R. G. Lucchi, J. L. Smellie, S. Benetti, H. Grobe, J. B. Hunt, and R. D. Larter (2008b), Volcanic time!markers for Marine Isotopic Stages 6 and 5 in Southern Ocean sediments and Antarctic ice cores: Implications for tephra correlations between palaeoclimatic records, Quat. Sci. Rev., 27, 518–540, doi:10.1016/j.quascirev.2007.11.009. Horng, C.!S., and A. P. Roberts (2006), Authigenic or detrital origin of pyrrhotite in sediments?: Resolving a paleomagnetic conundrum, Earth Planet. Sci. Lett., 241, 750–762, doi:10.1016/j.epsl.2005.11.008. Hounslow, M. W., and B. A. Maher (1996), Quantitative extraction and analysis of carriers of magnetization in sediments, Geophys. J. Int., 124, 57–74, doi:10.1111/j.1365-246X.1996.tb06352.x. Hounslow, M. W., and B. A. Maher (1999), Laboratory procedures for quantitative extraction and analysis of magnetic minerals from sediments, in Environmental Magnetism, A Practical Guide, Tech. Guide, vol. 6, edited by J. Walden, F. Oldfield, and J. Smith, pp. 139–164, Quat. Res. Assoc., Lancaster, U. K. Hrouda, F. (1994), A technique for the measurements of thermal changes of magnetic susceptibility of weakly magnetic rocks by the CS!2 Apparatus and KLY!2 Kappabridge, Geophys. J. Int., 118, 604–612, doi:10.1111/ j.1365-246X.1994.tb03987.x. Intergovernmental Panel on Climate Change (IPCC) (2007), Summary for policymakers, in Climate Change 2007: The Physical Science Basis ! Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by S. Solomon et al., 996 pp., Cambridge Univ. Press, New York. King, J. C., J. Turner, G. J. Marshall, W. M. Connolley, and T. A. Lachlan! Cope (2003), Antarctic Peninsula climate variability and its causes as revealed by analysis of instrumental records, in Antarctic Peninsula Climate Variability: Historical and Paleoenvironmental Perspectives, Antarct. Res. Ser., no. 79, edited by E. Domack et al., pp. 17–30, AGU, Washington, D. C. Kirschvink, J. L. (1980), The least!square line and plane and the analysis of palaeomagnetic data, Geophys. J. R. Astron. Soc., 62, 699–718. Lowrie, W. (1990), Identification of ferromagnetic minerals in a rock by coercivity and unblocking temperature profiles, Geophys. Res. Lett., 17, 159–162, doi:10.1029/GL017i002p00159. Lucchi, R. G., and M. Rebesco (2007), Glacial contourites on the Antarctic Peninsula margin: Insight for palaeoenvironmental and palaeoclimatic conditions, Spec. Publ. Geol. Soc. London, 276, 111–127, doi:10.1144/ GSL.SP.2007.276.01.06. Lucchi, R. G., M. Rebesco, A. Camerlenghi, M. Busetti, L. Tomadin, G. Villa, D. Persico, C. Morigi, M. C. Bonci, and G. Giorgetti (2002), Mid!late Pleistocene glacimarine sedimentary processes of a high! latitude, deep!sea sediment drift (Antarctic Peninsula Pacific margin), Mar. Geol., 189, 343–370, doi:10.1016/S0025-3227(02)00470-X. Macrì, P., L. Sagnotti, R. G. Lucchi, and M. Rebesco (2006), A stacked record of relative geomagnetic paleointensity for the past 270 kyr from the western continental rise of the Antarctic Peninsula, Earth Planet. Sci. Lett., 252, 162–179, doi:10.1016/j.epsl.2006.09.037. Mazaud, A. (2005), User!friendly software for vector analysis of the magnetization of long sediment cores, Geochem. Geophys. Geosyst., 6, Q12006, doi:10.1029/2005GC001036. Nishitani, T., and M. Kono (1983), Curie temperatures and lattice constant of oxidized titanomagnetite, Geophys. J. R. Astron. Soc., 74, 585–600. Ó Cofaigh, C., J. A. Dowdeswell, and C. J. Pudsey (2001), Late Quaternary iceberg rafting along the Antarctic Peninsula continental rise and in the Weddell and Scotia Seas, Quat. Res., 56, 308–321, doi:10.1006/ qres.2001.2267. Paillard, D., L. Labeyrie, and P. Yiou (1996), Macintosh program performs time!series analysis, Eos Trans. AGU, 77(39), 379, doi:10.1029/ 96EO00259. Pan, Y., N. Petersen, A. F. Davila, L. Zhang, M. Winklhofer, Q. Liu, M. Hanzlik, and R. Zhu (2005), The detection of bacterial magnetite in recent sediments of Lake Chiemsee (southern Germany), Earth Planet. Sci. Lett., 232, 109–123, doi:10.1016/j.epsl.2005.01.006. Peters, C., and M. J. Dekkers (2003), Selected room temperature magnetic parameters as a function of mineralogy, concentration and grain size, Phys. Chem. Earth, 28, 659–667. Pike, C. R., A. P. Roberts, and K. L. Verosub (2001), First!order reversal curve diagrams and thermal relaxation effects in magnetic particles, Geophys. J. Int., 145, 721–730, doi:10.1046/j.0956-540x.2001.01419.x. Pudsey, C. J. (2000), Sedimentation on the continental rise west of the Antarctic Peninsula over the last three glacial cycles, Mar. Geol., 167, 313–338, doi:10.1016/S0025-3227(00)00039-6. Pudsey, C. J., and A. Camerlenghi (1998), Glacial!interglacial deposition on a sediment drift on the Pacific margin of the Antarctic Peninsula, Antarct. Sci., 10, 286–308, doi:10.1017/S0954102098000376. Rebesco, M., R. D. Larter, A. Camerlenghi, and P. F. Barker (1996), Giant sediment drifts on the continental rise west of the Antarctic Peninsula, Geo Mar. Lett., 16, 65–75, doi:10.1007/BF02202600. Rebesco, M., R. D. Larter, P. F. Barker, A. Camerlenghi, and L. E. Vanneste (1997), The history of sedimentation on the continental rise west of the Antarctic Peninsula, in Geology and Seismic Stratigraphy of the Antarctic Margin, Part 2, Antarct. Res. Ser., no. 71, edited by P. F. Barker and A. K. Cooper, pp. 29–49, AGU, Washington, D. C. Rebesco, M., A. Camerlenghi, and C. Zanolla (1998), Bathymetry and morphogenesis of the continental margin west of the Antarctic Peninsula, Terra Antarct., 5, 715–725. Rebesco, M., C. J. Pudsey, M. Canals, A. Camerlenghi, P. F. Barker, F. Estrada, and A. Giorgetti (2002), Sediment drifts and deep!sea channel systems, Antarctic Peninsula Pacific Margin, in Deep!Water Contourite Systems: Modern Drifts and Ancient Series, Seismic and Sedimentary Characteristics, edited by D. A. V. Stow et al., Mem. Geol. Soc. London, 22, 353–371. Rebesco, M., A. Camerlenghi, V. Volpi, C. Neagu,D. Accettella, B. Lindberg, A. Cova, F. Zgur, and the MAGICO party (2007), Interaction of processes and importance of contourites: Insights from the detailed morphology of sediment drift 7, Antarctica, in Economic and Palaeoceanographic Significance of Contourite Deposits, edited by A. R. Viana, and M. Rebesco, Geol. Soc. Spec. Publ., 276, 95–110. Roberts, A. P. (1995), Magnetic properties of sedimentary greigite (Fe3S4), Earth Planet. Sci. Lett., 134, 227–236, doi:10.1016/0012-821X(95) 00131-U. Roberts, A. P., and M. Winklhofer (2004), Why are geomagnetic excursions not always recorded in sediments? Constraints from post!depositional remanent magnetization lock!in modelling, Earth Planet. Sci. Lett., 227, 345–359, doi:10.1016/j.epsl.2004.07.040. Roberts, A. P., J. S. Stoner, and C. Richter (1999), Diagenetic magnetic enhancement of sapropels from the eastern Mediterranean Sea, Mar. Geol., 153, 103–116, doi:10.1016/S0025-3227(98)00087-5. Roberts, A. P., C. R. Pike, and K. L. Verosub (2000), First!order reversal curve diagrams: A new tool for characterizing the magnetic properties of natural samples, J. Geophys. Res., 105, 28,461–28,475, doi:10.1029/ 2000JB900326. Roberts, A. P., W.!T. Jiang, F. Florindo, C.!S. Horng, and C. Laj (2005), Assessing the timing of greigite formation and the reliability of the Upper Olduvai polarity transition record from the Crostolo River, Italy, Geophys. Res. Lett., 32, L05307, doi:10.1029/2004GL022137. Roberts, A. P., F. Florindo, J. C. Larrasoaña, M. A. O’Regan, and X. Zhao (2010), Complex polarity pattern at the former Plio!Pleistocene global stratotype section at Vrica (Italy): Remagnetization by magnetic iron sulphides,Earth Planet. Sci. Lett., 292, 98–111, doi:10.1016/j.epsl.2010. 01.025. Roberts, A. P., L. Chang, C. J. Rowan, C.!S. Horng, and F. Florindo (2011), Magnetic properties of sedimentary greigite (Fe3S4): An update, Rev. Geophys., 49, RG1002, doi:10.1029/2010RG000336. Rochette, P., G. Fillion, J.!L. Mattéi, and M. J. Dekkers (1990), Magnetic transition at 30–34 Kelvin in pyrrhotite: Insight into a widespread occurrence of this mineral in rocks, Earth Planet. Sci. Lett., 98, 319–328, doi:10.1016/0012-821X(90)90034-U. Rowan, C. J., and A. P. Roberts (2005), Tectonic and geochronological implications of variably timed magnetizations carried by authigenic greigite in marine sediments from New Zealand, Geology, 33, 553–556, doi:10.1130/G21382.1. Rowan, C. J., and A. P. Roberts (2006), Magnetite dissolution, diachronous greigite formation, and secondary magnetizations from pyrite oxidation: Unravelling complex magnetizations in Neogene marine sediments from New Zealand, Earth Planet. Sci. Lett., 241, 119–137, doi:10.1016/j. epsl.2005.10.017. Sachs, J. P., and R. F. Anderson (2005), Increased productivity in the subantarctic ocean during Heinrich events, Nature, 434, 1118–1121, doi:10.1038/nature03544. Sagnotti, L., P. Macrì, A. Camerlenghi, and M. Rebesco (2001), Environmental magnetism of late Pleistocene sediments from the Pacific margin of the Antarctic Peninsula and interhemispheric correlation of climatic events, Earth Planet. Sci. Lett., 192, 65–80, doi:10.1016/S0012-821X (01)00438-1. Sagnotti, L., A. P. Roberts, R. Weaver, K. L. Verosub, F. Florindo, C. R. Pike, T. Clayton, and G. S. Wilson (2005), Apparent magnetic polarity reversals due to remagnetization resulting from late diagenetic growth of greigite from siderite, Geophys. J. Int., 160, 89–100, doi:10.1111/j.1365-246X.2005.02485.x. Stoner, J. S., J. E. T. Channell, and C. Hillaire!Marcel (1998), A 200 ka geomagnetic chronostratigraphy for the Labrador Sea: Indirect correlation of the sediment record to SPECMAP, Earth Planet. Sci. Lett., 159, 165–181, doi:10.1016/S0012-821X(98)00069-7. Stoner, J. S., C. Laj, J. E. T. Channell, and C. Kissel (2002), South Atlantic and North Atlantic geomagnetic paleointensity stacks (0–80 ka): Implications for inter!hemispheric correlation, Quat. Sci. Rev., 21, 1141–1151, doi:10.1016/S0277-3791(01)00136-6. Turner, J., S. R. Colwell, G. J. Marshall, T. A. Lachlan!Cope, A. M. Carleton, P. D. Jones, V. Lagun, P. A. Reid, and S. Iagovkina (2005), Antarctic climate change during the last 50 years, Int. J. Climatol., 25, 279–294, doi:10.1002/joc.1130. Uenzelmann!Neben, G. (2006), Depositional patterns at drift 7, Antarctic Peninsula: Along!slope versus down!slope sediment transport as indicators for oceanic currents and climatic conditions, Mar. Geol., 233, 49–62, doi:10.1016/j.margeo.2006.08.008. Venuti, A., and F. Florindo (2004), Magnetostratigraphy and environmental magnetism of two Quaternary deep!sea gravity cores from the west Pacific Southern Ocean, Geochem. Geophys. Geosyst., 5, Q12011, doi:10.1029/2004GC000810. Villa, G., D. Persico, M. C. Bonci, R. G. Lucchi, C. Morigi, and M. Rebesco (2003), Biostratigraphic characterization and Quaternary microfossil palaeoecology in sediment drifts west of the Antarctic Peninsula!implications for cyclic glacial!interglacial deposition, Palaeogeogr. Palaeoclimatol. Palaeoecol., 198, 237–263, doi:10.1016/S0031-0182(03)00403-6. Weeks, R., C. Laj, L. Endignoux, M. Fuller, A. Roberts, R. Manganne, E. Blanchard, and W. Goree (1993), Improvements in long!core measurement techniques: Applications in palaeomagnetism and palaeoceanography, Geophys. J. Int., 114, 651–662, doi:10.1111/j.1365-246X.1993. tb06994.x. http://hdl.handle.net/2122/7047 doi:10.1029/2010JB007952 |
op_rights |
restricted |
op_doi |
https://doi.org/10.1029/2010JB007952 https://doi.org/10.1029/2001JB000518 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
B6 |
_version_ |
1766271552641302528 |
spelling |
ftingv:oai:www.earth-prints.org:2122/7047 2023-05-15T14:01:36+02:00 Late Quaternary sediments from deep!sea sediment drifts on the Antarctic Peninsula Pacific margin: Climatic control on provenance of minerals Venuti, A. Florindo, F. Caburlotto, A. Hounslow, M. W. Hillenbrand, C.-D. Strada, E. Talarico, F. M. Cavallo, A. Venuti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Caburlotto, A.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Sgonico, Italy Hounslow, M. W.; Lancaster Environment Centre, Lancaster University, Lancaster, UK Hillenbrand, C.-D.; British Antarctic Survey, Cambridge, UK Strada, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Talarico, F. M.; Dipartimento di Scienze della Terra, Università di Siena, Siena, Italy Cavallo, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Sgonico, Italy Lancaster Environment Centre, Lancaster University, Lancaster, UK British Antarctic Survey, Cambridge, UK Dipartimento di Scienze della Terra, Università di Siena, Siena, Italy Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia 2011-06-21 http://hdl.handle.net/2122/7047 https://doi.org/10.1029/2010JB007952 en eng American Geophysical Union Journal of Geophysical Research /116 (2011) Acton, G. D., M. Okada, B. M. Clement, S. P. Lund, and T. Williams (2002), Paleomagnetic overprints in ocean sediment cores and their relationship to shear deformation caused by piston coring, J. Geophys. Res., 107(B4), 2067, doi:10.1029/2001JB000518. Amblas,D., R. Urgeles, M. Canals,A.M.Calafat,M.Rebesco,A.Camerlenghi, F. Estrada, M. De Batist, and J. E. Hughes!Clarke (2006), Relationship between continental rise development and palaeo!ice sheet dynamics, Northern Antarctic Peninsula Pacific margin, Quat. Sci. Rev., 25, 933–944, doi:10.1016/j.quascirev.2005.07.012. Anderson, R. F., S. Ali, L. I. Bradtmiller, S. H. H. Nielsen, M. Q. Fleisher, B. E. Anderson, and L. H. Burckle (2009), Wind!driven upwelling in the Southern Ocean and the deglacial rise in atmospheric CO2, Science, 323, 1443–1448, doi:10.1126/science.1167441. Barker, P. F., et al. (1999a), Proceedings of the Ocean Drilling Program Initial Reports, vol. 178, Ocean Drill. Program, College Station, Tex., doi:10.2973/odp.proc.ir.178.1999. Barker, P. F., P. J. Barrett, A. K. Cooper, and P. Huybrechts (1999b), Antarctic glacial history from numerical models and continental margin sediments, Palaeogeogr. Palaeoclimatol. Palaeoecol., 150, 247–267, doi:10.1016/S0031-0182(98)00224-7. Barker, P. F., A. Camerlenghi, G. D. Acton, and A. T. S. Ramsay (Eds.) (2002), Proceedings of the Ocean Drilling Program Scientific Results, vol. 178, Ocean Drill. Program, College Station, Tex., doi:10.2973/ odp.proc.sr.178.2002. Barker, P. F., G. M. Filippelli, F. Florindo, E. E. Martin, and H. D. Scher (2007), Onset and role of the Antarctic Circumpolar Current, Deep Sea Res., Part II, 54, 2388–2398, doi:10.1016/j.dsr2.2007.07.028. Brachfeld, S. A., Y. Guyodo, and G. D. Acton (2001), Data report: The magnetic mineral assemblage of hemipelagic drifts, ODP Site 1096, Proc. Ocean Drill. Program Sci. Results, 178, 1–10, doi:10.2973/odp. proc.sr.178.233.2001. Camerlenghi, A., A. Crise, C. J. Pudsey, E. Accerboni, R. Laterza, and M. Rebesco (1997a), Ten!month observation of the bottom current regime across a sediment drift of the Pacific margin of the Antarctic Peninsula, Antarct. Sci., 9, 426–433, doi:10.1017/S0954102097000552. Camerlenghi, A., M. Rebesco, and C. J. Pudsey (1997b), High resolution terrigenous sedimentary record of a sediment drift on the Antarctic Peninsula Pacific margin (Initial Results of the ‘SEDANO’ Program), in The Antarctic Region: Geological Evolution and Processes, edited by C. A. Ricci, pp. 705–710, Terra Antartica, Siena, Italy. Carter, L., I. N. McCave, and M. J. M. Williams (2008), Circulation and water masses of the Southern Ocean: A review, in Antarctic Climate Evolution, Dev. Earth Environ. Sci., vol. 8, pp. 85–114, edited by F. Florindo and M. Siegert, Elsevier, New York. Chapman, M. R., N. J. Shackleton, and J.!C. Duplessy (2000), Sea surface temperature variability during the last glacial!interglacial cycle: Assessing the magnitude and pattern of climate change in the North Atlantic, Palaeogeogr. Palaeoclimatol. Palaeoecol., 157, 1–25, doi:10.1016/ S0031-0182(99)00168-6. Cowan, E. A., C.!D. Hillenbrand, L. E. Hassler, and M. T. Ake (2008), Coarse!grained terrigenous sediment deposition on continental rise drifts: A record of Plio!Pleistocene glaciation on the Antarctic Peninsula, Palaeogeogr. Palaeoclimatol. Palaeoecol., 265, 275–291, doi:10.1016/ j.palaeo.2008.03.010. Day, R., M. Fuller, and V. A. Schmidt (1977), Hysteresis properties of titanomagnetites: Grain!size and compositional dependence, Phys. Earth Planet. Inter., 13, 260–267, doi:10.1016/0031-9201(77)90108-X. Dekkers, M. J. (1989), Magnetic properties of natural pyrrhotite. II. High! and low!temperature behaviour of Jrs and TRM as function of grain size, Phys. Earth Planet. Inter., 57, 266–283, doi:10.1016/0031-9201(89)90116-7. Dunlop, D. J. (2002), Theory and application of the Day plot (Mrs/Ms versus Hcr/Hc): 1. Theoretical curves and tests using titanomagnetite data, J. Geophys. Res., 107(B3), 2056, doi:10.1029/2001JB000486. EPICA Community Members (2006), One!to!one hemispheric coupling of glacial climate variability in Greenland and Antarctica, Nature, 444, 195–198, doi:10.1038/nature05301. Feinberg, J. M., G. R. Scott, P. R. Renne, and H.!R. Wenk (2005), Exsolved magnetite inclusions in silicates: Features determining their remanence behavior, Geology, 33, 513–516, doi:10.1130/G21290.1. Florindo, F., and L. Sagnotti (1995), Palaeomagnetism and rock magnetism in the upper Pliocene Valle Ricca (Rome, Italy) section, Geophys. J. Int., 123, 340–354, doi:10.1111/j.1365-246X.1995.tb06858.x. Florindo, F., and M. Siegert (Eds.) (2008), Antarctic Climate Evolution, Dev. Earth Environ. Sci., vol. 8, pp. 1–593, Elsevier, New York. Florindo, F., G. S. Wilson, A. P. Roberts, L. Sagnotti, and K. L. Verosub (2005), Magnetostratigraphic chronology of a Late Eocene to early Miocene glacimarine succession from the Victoria Land Basin, Ross Sea, Antarctica, Global Planet. Change, 45, 207–236, doi:10.1016/j.gloplacha. 2004.09.009. Florindo, F., D. B. Karner, F. Marra, P. R. Renne, A. P. Roberts, and R. Weaver (2007), Radioisotopic age constraints for Glacial Terminations IX and VII from aggradational sections of the Tiber River delta in Rome, Italy, Earth Planet. Sci. Lett., 256, 61–80, doi:10.1016/j. epsl.2007.01.014. Giorgetti, A., A. Crise, R. Laterza, L. Perini, M. Rebesco, and A. Camerlenghi (2003), Water masses and bottom boundary layer dynamics above a sediment drift of the Antarctic Peninsula Pacific Margin, Antarct. Sci., 15, 537–546, doi:10.1017/S0954102003001652. Guyodo, Y., and J.!P. Valet (1999), Global changes in intensity of the Earth’s magnetic field during the past 800 kyr, Nature, 399, 249–252, doi:10.1038/20420. Guyodo, Y., G. D. Acton, S. Brachfeld, and J. E. T. Channell (2001), A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101), Earth Planet. Sci. Lett., 191, 61–74, doi:10.1016/S0012-821X(01)00402-2. Harland, R., and C. J. Pudsey (1999), Dinoflagellate cysts from sediment traps deployed in the Bellingshausen, Weddell and Scotia seas, Antarctica, Mar. Micropaleontol., 37, 77–99, doi:10.1016/S0377-8398(99)00016-X. Harrison, R. J., and J. M. Feinberg (2008), FORCinel: An improved algorithm for calculating first!order reversal curve distributions using locally weighted regression smoothing, Geochem. Geophys. Geosyst., 9, Q05016, doi:10.1029/2008GC001987. Hawkes, I. J., M. W. Hounslow, C. J. Pudsey, and B. A. Maher (2003), Sediment dispersal pathways from the western Antarctic Peninsula during the last glacial period and the significance of temporal fluctuations in magnetic properties, Geophys. Res. Abstr., 5, 11,099. Heinrich, H. (1988), Origin and consequences of cycling ice rafting in the northeast Atlantic Ocean during the past 130,000 years, Quat. Res., 29, 142–152, doi:10.1016/0033-5894(88)90057-9. Hemming, S. R. (2004), Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint, Rev. Geophys., 42, RG1005, doi:10.1029/2003RG000128. Hernández!Molina, F. J., R. D. Larter, A. Maldonado, and J. Rodríguez! Fernández (2006), Evolution of the Antarctic Peninsula Pacific margin offshore from Adelaide Island since the late Miocene: An example of a glacial passive margin, Terra Antarct. Rep., 12, 81–90. Hillenbrand, C.!D., and W. Ehrmann (2002), Distribution of clay minerals in drift sediments on the continental rise west of the Antarctic Peninsula, ODP Leg 178, Sites 1095 and 1096, Proc. Ocean Drill. Program Sci. Results, 178, 1–29, doi:10.2973/odp.proc.sr.178.224.2001. Hillenbrand, C.!D., and W. Ehrmann (2005), Late Neogene to Quaternary environmental changes in the Antarctic Peninsula region: Evidence from drift sediments, Global Planet. Change, 45, 165–191, doi:10.1016/j. gloplacha.2004.09.006. Hillenbrand, C.!D., A. Camerlenghi, E. A. Cowan, F. J. Hernández!Molina, R. G. Lucchi, M. Rebesco, and G. Uenzelmann!Neben (2008a), The present and past bottom!current flow regime around the sediment drifts on the continental rise west of Antarctic Peninsula, Mar. Geol., 255, 55–63, doi:10.1016/j.margeo.2008.07.004. Hillenbrand, C.!D., S. G. Moreton, A. Caburlotto, C. J. Pudsey, R. G. Lucchi, J. L. Smellie, S. Benetti, H. Grobe, J. B. Hunt, and R. D. Larter (2008b), Volcanic time!markers for Marine Isotopic Stages 6 and 5 in Southern Ocean sediments and Antarctic ice cores: Implications for tephra correlations between palaeoclimatic records, Quat. Sci. Rev., 27, 518–540, doi:10.1016/j.quascirev.2007.11.009. Horng, C.!S., and A. P. Roberts (2006), Authigenic or detrital origin of pyrrhotite in sediments?: Resolving a paleomagnetic conundrum, Earth Planet. Sci. Lett., 241, 750–762, doi:10.1016/j.epsl.2005.11.008. Hounslow, M. W., and B. A. Maher (1996), Quantitative extraction and analysis of carriers of magnetization in sediments, Geophys. J. Int., 124, 57–74, doi:10.1111/j.1365-246X.1996.tb06352.x. Hounslow, M. W., and B. A. Maher (1999), Laboratory procedures for quantitative extraction and analysis of magnetic minerals from sediments, in Environmental Magnetism, A Practical Guide, Tech. Guide, vol. 6, edited by J. Walden, F. Oldfield, and J. Smith, pp. 139–164, Quat. Res. Assoc., Lancaster, U. K. Hrouda, F. (1994), A technique for the measurements of thermal changes of magnetic susceptibility of weakly magnetic rocks by the CS!2 Apparatus and KLY!2 Kappabridge, Geophys. J. Int., 118, 604–612, doi:10.1111/ j.1365-246X.1994.tb03987.x. Intergovernmental Panel on Climate Change (IPCC) (2007), Summary for policymakers, in Climate Change 2007: The Physical Science Basis ! Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by S. Solomon et al., 996 pp., Cambridge Univ. Press, New York. King, J. C., J. Turner, G. J. Marshall, W. M. Connolley, and T. A. Lachlan! Cope (2003), Antarctic Peninsula climate variability and its causes as revealed by analysis of instrumental records, in Antarctic Peninsula Climate Variability: Historical and Paleoenvironmental Perspectives, Antarct. Res. Ser., no. 79, edited by E. Domack et al., pp. 17–30, AGU, Washington, D. C. Kirschvink, J. L. (1980), The least!square line and plane and the analysis of palaeomagnetic data, Geophys. J. R. Astron. Soc., 62, 699–718. Lowrie, W. (1990), Identification of ferromagnetic minerals in a rock by coercivity and unblocking temperature profiles, Geophys. Res. Lett., 17, 159–162, doi:10.1029/GL017i002p00159. Lucchi, R. G., and M. Rebesco (2007), Glacial contourites on the Antarctic Peninsula margin: Insight for palaeoenvironmental and palaeoclimatic conditions, Spec. Publ. Geol. Soc. London, 276, 111–127, doi:10.1144/ GSL.SP.2007.276.01.06. Lucchi, R. G., M. Rebesco, A. Camerlenghi, M. Busetti, L. Tomadin, G. Villa, D. Persico, C. Morigi, M. C. Bonci, and G. Giorgetti (2002), Mid!late Pleistocene glacimarine sedimentary processes of a high! latitude, deep!sea sediment drift (Antarctic Peninsula Pacific margin), Mar. Geol., 189, 343–370, doi:10.1016/S0025-3227(02)00470-X. Macrì, P., L. Sagnotti, R. G. Lucchi, and M. Rebesco (2006), A stacked record of relative geomagnetic paleointensity for the past 270 kyr from the western continental rise of the Antarctic Peninsula, Earth Planet. Sci. Lett., 252, 162–179, doi:10.1016/j.epsl.2006.09.037. Mazaud, A. (2005), User!friendly software for vector analysis of the magnetization of long sediment cores, Geochem. Geophys. Geosyst., 6, Q12006, doi:10.1029/2005GC001036. Nishitani, T., and M. Kono (1983), Curie temperatures and lattice constant of oxidized titanomagnetite, Geophys. J. R. Astron. Soc., 74, 585–600. Ó Cofaigh, C., J. A. Dowdeswell, and C. J. Pudsey (2001), Late Quaternary iceberg rafting along the Antarctic Peninsula continental rise and in the Weddell and Scotia Seas, Quat. Res., 56, 308–321, doi:10.1006/ qres.2001.2267. Paillard, D., L. Labeyrie, and P. Yiou (1996), Macintosh program performs time!series analysis, Eos Trans. AGU, 77(39), 379, doi:10.1029/ 96EO00259. Pan, Y., N. Petersen, A. F. Davila, L. Zhang, M. Winklhofer, Q. Liu, M. Hanzlik, and R. Zhu (2005), The detection of bacterial magnetite in recent sediments of Lake Chiemsee (southern Germany), Earth Planet. Sci. Lett., 232, 109–123, doi:10.1016/j.epsl.2005.01.006. Peters, C., and M. J. Dekkers (2003), Selected room temperature magnetic parameters as a function of mineralogy, concentration and grain size, Phys. Chem. Earth, 28, 659–667. Pike, C. R., A. P. Roberts, and K. L. Verosub (2001), First!order reversal curve diagrams and thermal relaxation effects in magnetic particles, Geophys. J. Int., 145, 721–730, doi:10.1046/j.0956-540x.2001.01419.x. Pudsey, C. J. (2000), Sedimentation on the continental rise west of the Antarctic Peninsula over the last three glacial cycles, Mar. Geol., 167, 313–338, doi:10.1016/S0025-3227(00)00039-6. Pudsey, C. J., and A. Camerlenghi (1998), Glacial!interglacial deposition on a sediment drift on the Pacific margin of the Antarctic Peninsula, Antarct. Sci., 10, 286–308, doi:10.1017/S0954102098000376. Rebesco, M., R. D. Larter, A. Camerlenghi, and P. F. Barker (1996), Giant sediment drifts on the continental rise west of the Antarctic Peninsula, Geo Mar. Lett., 16, 65–75, doi:10.1007/BF02202600. Rebesco, M., R. D. Larter, P. F. Barker, A. Camerlenghi, and L. E. Vanneste (1997), The history of sedimentation on the continental rise west of the Antarctic Peninsula, in Geology and Seismic Stratigraphy of the Antarctic Margin, Part 2, Antarct. Res. Ser., no. 71, edited by P. F. Barker and A. K. Cooper, pp. 29–49, AGU, Washington, D. C. Rebesco, M., A. Camerlenghi, and C. Zanolla (1998), Bathymetry and morphogenesis of the continental margin west of the Antarctic Peninsula, Terra Antarct., 5, 715–725. Rebesco, M., C. J. Pudsey, M. Canals, A. Camerlenghi, P. F. Barker, F. Estrada, and A. Giorgetti (2002), Sediment drifts and deep!sea channel systems, Antarctic Peninsula Pacific Margin, in Deep!Water Contourite Systems: Modern Drifts and Ancient Series, Seismic and Sedimentary Characteristics, edited by D. A. V. Stow et al., Mem. Geol. Soc. London, 22, 353–371. Rebesco, M., A. Camerlenghi, V. Volpi, C. Neagu,D. Accettella, B. Lindberg, A. Cova, F. Zgur, and the MAGICO party (2007), Interaction of processes and importance of contourites: Insights from the detailed morphology of sediment drift 7, Antarctica, in Economic and Palaeoceanographic Significance of Contourite Deposits, edited by A. R. Viana, and M. Rebesco, Geol. Soc. Spec. Publ., 276, 95–110. Roberts, A. P. (1995), Magnetic properties of sedimentary greigite (Fe3S4), Earth Planet. Sci. Lett., 134, 227–236, doi:10.1016/0012-821X(95) 00131-U. Roberts, A. P., and M. Winklhofer (2004), Why are geomagnetic excursions not always recorded in sediments? Constraints from post!depositional remanent magnetization lock!in modelling, Earth Planet. Sci. Lett., 227, 345–359, doi:10.1016/j.epsl.2004.07.040. Roberts, A. P., J. S. Stoner, and C. Richter (1999), Diagenetic magnetic enhancement of sapropels from the eastern Mediterranean Sea, Mar. Geol., 153, 103–116, doi:10.1016/S0025-3227(98)00087-5. Roberts, A. P., C. R. Pike, and K. L. Verosub (2000), First!order reversal curve diagrams: A new tool for characterizing the magnetic properties of natural samples, J. Geophys. Res., 105, 28,461–28,475, doi:10.1029/ 2000JB900326. Roberts, A. P., W.!T. Jiang, F. Florindo, C.!S. Horng, and C. Laj (2005), Assessing the timing of greigite formation and the reliability of the Upper Olduvai polarity transition record from the Crostolo River, Italy, Geophys. Res. Lett., 32, L05307, doi:10.1029/2004GL022137. Roberts, A. P., F. Florindo, J. C. Larrasoaña, M. A. O’Regan, and X. Zhao (2010), Complex polarity pattern at the former Plio!Pleistocene global stratotype section at Vrica (Italy): Remagnetization by magnetic iron sulphides,Earth Planet. Sci. Lett., 292, 98–111, doi:10.1016/j.epsl.2010. 01.025. Roberts, A. P., L. Chang, C. J. Rowan, C.!S. Horng, and F. Florindo (2011), Magnetic properties of sedimentary greigite (Fe3S4): An update, Rev. Geophys., 49, RG1002, doi:10.1029/2010RG000336. Rochette, P., G. Fillion, J.!L. Mattéi, and M. J. Dekkers (1990), Magnetic transition at 30–34 Kelvin in pyrrhotite: Insight into a widespread occurrence of this mineral in rocks, Earth Planet. Sci. Lett., 98, 319–328, doi:10.1016/0012-821X(90)90034-U. Rowan, C. J., and A. P. Roberts (2005), Tectonic and geochronological implications of variably timed magnetizations carried by authigenic greigite in marine sediments from New Zealand, Geology, 33, 553–556, doi:10.1130/G21382.1. Rowan, C. J., and A. P. Roberts (2006), Magnetite dissolution, diachronous greigite formation, and secondary magnetizations from pyrite oxidation: Unravelling complex magnetizations in Neogene marine sediments from New Zealand, Earth Planet. Sci. Lett., 241, 119–137, doi:10.1016/j. epsl.2005.10.017. Sachs, J. P., and R. F. Anderson (2005), Increased productivity in the subantarctic ocean during Heinrich events, Nature, 434, 1118–1121, doi:10.1038/nature03544. Sagnotti, L., P. Macrì, A. Camerlenghi, and M. Rebesco (2001), Environmental magnetism of late Pleistocene sediments from the Pacific margin of the Antarctic Peninsula and interhemispheric correlation of climatic events, Earth Planet. Sci. Lett., 192, 65–80, doi:10.1016/S0012-821X (01)00438-1. Sagnotti, L., A. P. Roberts, R. Weaver, K. L. Verosub, F. Florindo, C. R. Pike, T. Clayton, and G. S. Wilson (2005), Apparent magnetic polarity reversals due to remagnetization resulting from late diagenetic growth of greigite from siderite, Geophys. J. Int., 160, 89–100, doi:10.1111/j.1365-246X.2005.02485.x. Stoner, J. S., J. E. T. Channell, and C. Hillaire!Marcel (1998), A 200 ka geomagnetic chronostratigraphy for the Labrador Sea: Indirect correlation of the sediment record to SPECMAP, Earth Planet. Sci. Lett., 159, 165–181, doi:10.1016/S0012-821X(98)00069-7. Stoner, J. S., C. Laj, J. E. T. Channell, and C. Kissel (2002), South Atlantic and North Atlantic geomagnetic paleointensity stacks (0–80 ka): Implications for inter!hemispheric correlation, Quat. Sci. Rev., 21, 1141–1151, doi:10.1016/S0277-3791(01)00136-6. Turner, J., S. R. Colwell, G. J. Marshall, T. A. Lachlan!Cope, A. M. Carleton, P. D. Jones, V. Lagun, P. A. Reid, and S. Iagovkina (2005), Antarctic climate change during the last 50 years, Int. J. Climatol., 25, 279–294, doi:10.1002/joc.1130. Uenzelmann!Neben, G. (2006), Depositional patterns at drift 7, Antarctic Peninsula: Along!slope versus down!slope sediment transport as indicators for oceanic currents and climatic conditions, Mar. Geol., 233, 49–62, doi:10.1016/j.margeo.2006.08.008. Venuti, A., and F. Florindo (2004), Magnetostratigraphy and environmental magnetism of two Quaternary deep!sea gravity cores from the west Pacific Southern Ocean, Geochem. Geophys. Geosyst., 5, Q12011, doi:10.1029/2004GC000810. Villa, G., D. Persico, M. C. Bonci, R. G. Lucchi, C. Morigi, and M. Rebesco (2003), Biostratigraphic characterization and Quaternary microfossil palaeoecology in sediment drifts west of the Antarctic Peninsula!implications for cyclic glacial!interglacial deposition, Palaeogeogr. Palaeoclimatol. Palaeoecol., 198, 237–263, doi:10.1016/S0031-0182(03)00403-6. Weeks, R., C. Laj, L. Endignoux, M. Fuller, A. Roberts, R. Manganne, E. Blanchard, and W. Goree (1993), Improvements in long!core measurement techniques: Applications in palaeomagnetism and palaeoceanography, Geophys. J. Int., 114, 651–662, doi:10.1111/j.1365-246X.1993. tb06994.x. http://hdl.handle.net/2122/7047 doi:10.1029/2010JB007952 restricted Antarctic Peninsula Pacific margin sediment drift late Pleistocene Mineral magnetism relative palaeointensity 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 04. Solid Earth::04.05. Geomagnetism::04.05.09. Environmental magnetism article 2011 ftingv https://doi.org/10.1029/2010JB007952 https://doi.org/10.1029/2001JB000518 2022-07-29T06:05:58Z We present results of detailed paleomagnetic investigations on deep!sea cores from sediment drifts located along the Pacific continental margin of the Antarctic Peninsula. High!resolution magnetic measurements on u channel samples provide detailed age models for three cores collected from drift 7, which document an age of 122 ka for the oldest sediments recovered near the drift crest at site SED!07 and a high sedimentation rate (11 cm/kyr) at site SED!12 located close to the Alexander Channel system. Low! and high!temperature magnetic measurements in conjunction with microscopic and mineralogic observations from drifts 4, 5 and 7 indicate that pseudosingle!domain detrital titanomagnetite (partially oxidized and with limited Ti substitution) is the dominant magnetic mineral in the drift sediments. The titanomagnetite occurs in two magnetic forms: (1) a low!coercivity form similar to laboratory!synthesized titanomagnetite and (2) a high!coercivity form (Bcr > 60 mT). These two forms vary in amount and stratigraphic distribution across the drifts. We did not find evidence for diagenetic magnetic iron sulfides as has been previously suggested for these drift deposits. The observed change of magnetic mineralogy in sediments deposited during Heinrich events on drift 7 appears to be related to warming periods, which temporarily modified the normal glacial transport pathways of glaciogenic detritus to and along the continental rise and thus resulted in deposition of sediments with a different provenance. Understanding this sediment provenance delivery signature at a wider spatial scale should provide information about ice sheet dynamics in West Antarctica over the last !100 kyr. Published B06104 2.2. Laboratorio di paleomagnetismo JCR Journal partially_open Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet West Antarctica Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Antarctic Peninsula Pacific The Antarctic West Antarctica Journal of Geophysical Research 116 B6 |