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 |
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| Main Authors: | , , , , , , , |
| Other Authors: | , , , , , , , , , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
American Geophysical Union
2011
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| Subjects: | |
| Online Access: | http://hdl.handle.net/2122/7047 https://doi.org/10.1029/2010JB007952 |
| id |
ftingv:oai:www.earth-prints.org:2122/7047 |
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| 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 |
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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 |
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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. 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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 |