A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica)
We report high-resolution paleomagnetic records obtained from six piston cores recovered on the continental rise of theWilkes Land Basin (WLB), East Antarctica, in the frame of the Italian/Australian Wilkes Land Glacial History (WEGA) project. The studied cores, with a length of ca. 4m each, were co...
| Published in: | Physics of the Earth and Planetary Interiors |
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| Main Authors: | , , , |
| Other Authors: | , , , , , |
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| Language: | English |
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Elsevier
2005
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| Online Access: | http://hdl.handle.net/2122/3572 https://doi.org/10.1016/j.pepi.2005.03.004 |
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ftingv:oai:www.earth-prints.org:2122/3572 |
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openpolar |
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Open Polar |
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Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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ftingv |
| language |
English |
| topic |
Paleomagnetism Relative paleointensity Geomagnetic excursions Antarctica Brunhes Chron 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field |
| spellingShingle |
Paleomagnetism Relative paleointensity Geomagnetic excursions Antarctica Brunhes Chron 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) |
| topic_facet |
Paleomagnetism Relative paleointensity Geomagnetic excursions Antarctica Brunhes Chron 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field |
| description |
We report high-resolution paleomagnetic records obtained from six piston cores recovered on the continental rise of theWilkes Land Basin (WLB), East Antarctica, in the frame of the Italian/Australian Wilkes Land Glacial History (WEGA) project. The studied cores, with a length of ca. 4m each, were collected from the gentle and steep sides of sedimentary ridges present in the lower part of the continental rise, and consist of very fine-grained sediments. Paleomagnetic measurements were carried out on u-channel samples. Apart from a low-coercivity magnetic overprint, removed after the first steps of alternating field demagnetization, each core is characterized by a well defined characteristic remanent magnetization. Paleomagnetic inclinations fluctuate around the expected value (of ca. −77◦) for such high latitude sites and always indicate normal magnetic polarity. Short period oscillations to anomalously shallow paleomagnetic inclinations (up to −20◦) were identified at different levels of the sampled sequences; positive (reverse) inclination values were however not observed. Specific rock magnetic measurements indicate a substantial homogeneity of the magnetic mineralogy in the sampled sequences. For each core we reconstructed curves of relative paleointensity (RPI, as computed by NRM20mT/κ and NRM20mT/ARM20mT) variation of the geomagnetic field. An original age modelwas established by tuning the individual RPI curves with the available global and regional reference RPI stacks. Paleomagnetic results, supported by other limited bio- and chronostratigraphic constraints, establish that all the cores are Late Pleistocene in age: two provide an expanded record of the last ca. 30 ka (PC18 and PC19), three span the last ca. 100, 200 and 300 ka (respectively, PC25, PC27 and PC26), and one reaches back to ca. 780 ka (PC20), approaching the Brunhes–Matuyama transition. Thus, the WEGA paleomagnetic record provides the first experimental data documenting the dynamics and amplitude of the geomagnetic field variations at high ... |
| author2 |
Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Caburlotto, A.; INOGS - Borgo Grotta Gigante 42/c, Sgonico (TS) Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia INOGS - Borgo Grotta Gigante 42/c, Sgonico (TS) |
| format |
Article in Journal/Newspaper |
| author |
Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. |
| author_facet |
Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. |
| author_sort |
Macrì, P. |
| title |
A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) |
| title_short |
A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) |
| title_full |
A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) |
| title_fullStr |
A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) |
| title_full_unstemmed |
A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) |
| title_sort |
composite record of late pleistocene relative geomagnetic paleointensity from wilkes land basin (antarctica) |
| publisher |
Elsevier |
| publishDate |
2005 |
| url |
http://hdl.handle.net/2122/3572 https://doi.org/10.1016/j.pepi.2005.03.004 |
| long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(144.000,144.000,-65.250,-65.250) |
| geographic |
East Antarctica Wilkes Land Wega |
| geographic_facet |
East Antarctica Wilkes Land Wega |
| genre |
Antarc* Antarctica East Antarctica Wilkes Land |
| genre_facet |
Antarc* Antarctica East Antarctica Wilkes Land |
| op_relation |
Physics of the Earth and Planetary Interiors / 151 (2005) Banerjee, S.K., King, J., Marvin, J., 1981. A rapid method for magnetic granulometry with applications to environmental studies. Geophys. Res. Lett. 8, 333–336. Benson, L.V., Liddicoat, J.C., Smoot, J.P., Sarna-Wojcicki, A., Negrini, R.M., Lund, S.P., 2003. The age of the Mono Lake excursion. Quat. Sci. Rev. 22, 135–140. Bindoff, N.L., Rosenberg, M.A., Warner, M.J., 2000. On the circulation and water masses over the Antarctic continental slope and rise between 80 and 150◦E. Deep-Sea Res. II 47, 2299– 2326. Biswas, D.K., Hyodo, M., Taniguchi, Y., Kaneko, M., Katoh, S., Sato, H., Kinugasa, Y., Mizuno, K., 1999. Magnetostratigraphy of Plio-Pleistocene sediments in a 1700-m core from Osaka Bay, southwestern Japan and short geomagnetic events in the middle Matuyama and early Brunhes chrons. Palaeogeogr. Palaeoclimatol. Palaeoecol. 148, 233–248. Brachfeld, S., Domack, E.W., Kissel, C., Laj, C., Leventer, A., Ishman, S.E., Gilbert, R., Camerlenghi, A., Eglinton, L.B., 2003. Holocene history of the Larsen ice shelf constrained by geomagnetic paleointensity dating. Geology 31, 749–752. Brachfeld, S., Kissel, C., Laj, C., Mazaud, A., 2004. Viscous behavior of U-channels during acquisition and demagnetization of remanences: implications for paleomagnetic and rock-magnetic investigations. Phys. Earth Planet. Int. 145, 1–8. Brancolini, G., Harris, P.T., 2000. Post Cruise Report AGSO Survey 217: Joint Italian/Australian Marine Geoscienze Expedition Aboard the R.V. Tangaroa to the Geotge Vth Land Region of East Antartica during February–March 2000. Australian National Antarctic Research Expeditions Project No. 1044. Wilkes Land Glacial History (WEGA), AGSO Record. Busetti, M., Caburlotto, A., Armand, L., Damiani, D., Giorgetti, G., Lucchi, R.G., Quilty, P.G., Villa, G., 2003. Plio-Quaternary sedimentation on the Wilkes Land continental rise: preliminary results. Deep-Sea Res. II 50, 1529–1562. Caburlotto, A., Macr`ı, P., Damiani, D., Giorgetti, G., Busetti, M., Villa, G., Lucchi, R.G., 2003. Piston cores from the Wilkes Land rise: data and considerations. Terra Antartica Rep. 9, 63–68. Caburlotto, A., 2003. Processi sedimentari di mare profondo sul Margine Continentale Glaciale Antartico. Ph.D. Thesis. University of Siena, Dottorato di Ricerca in Scienze Polari, XVI Ciclo, 16 dicembre 2003, 143 pp. Champion, D.E., Lanphere, M.A., Kuntz, M.A., 1988. Evidence for a new geomagnetic reversal from lava flows in Idaho: discussion of short polarity reversals in the Brunhes and late Matuyama polarity chrons. J. Geophys. Res. 93, 11667– 11680. Channell, J.E.T., Hodell, D.A., Lehman, B., 1997. Relative geomagnetic paleointensity and 18O at ODP Site 983 (Gardar Drift, North Atlantic) since 350 ka. Earth Planet. Sci. Lett. 153, 103–118. 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(Eds.), Antarctic Earth Science. Australian Academy of Science, Cambridge University Press, Camberra, pp. 402– 406. Eittreim, S., Gordon, A.L., Ewing, M., Thorndike, E.M., Bruchhausen, P., 1972. The nepheloid layer and observed bottom currents in the Indian-Pacific Antarctic Sea. In: Gordon, A.L. (Ed.), Studies in Physical Oceanography. Gordon and Breach, New York, pp. 19–35. Escutia, C., Eittreim, S.L., Cooper, A.K., 1997. Cenozoic sedimentation on the Wilkes Land continental rise, Antarctica. In: Ricci, C.A. (Ed.), Proceedings of the VII International Symposium on Antarctic Earth Sciences. Terra Antarctica Publication, Siena, pp. 791–795. Gordon, A.L., Tchernia, P., 1972. Waters of the continental margin off Ad´elie coast, Antarctica. In: Hayes, D.E. (Ed.), Antarctic Oceanology II: The Australian—New Zealand Sector. Antarctic Research Series. American Geophysical Union,Washington, pp. 59–69. Guyodo, Y., Valet, J.-P., 1996. Relative variations in geomagnetic intensity from sedimentary records: the past 200,000 years. Earth Planet. Sci. Lett. 143, 23–36. Guyodo, Y., Valet, J.-P., 1999. Global changes in intensity of the Earth’s magnetic field during the past 800 kyr. Nature (London) 399, 249–252. Guyodo,Y., Richter, C.,Valet, J.-P., 1999. Paleointensity record from Pleistocene sediments (1.4–0 Ma) off the California Margin. J. Geophys. Res. 104, 22953–22964. Guyodo, Y., Acton, G.D., Brachfeld, S., Channell, J.E.T., 2001. A sedimentary paleomagnetic record of the Matuyama Chron from the western Antarctic margin (ODP Site 1101). Earth Planet. Sci. Lett. 191, 61–74. Guyodo, Y., Channell, J.E.T., Thomas Ray, G., 2002. Deconvolution of u-channel paleomagnetic data near geomagnetic reversals and short events. Geoph. Res. Lett. 29 (17), 1845, doi:10.1029/2002GL014927. Guyodo, Y., Channell, J.E.T., 2002. 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ftingv:oai:www.earth-prints.org:2122/3572 2023-05-15T13:51:39+02:00 A composite record of Late Pleistocene relative geomagnetic paleointensity from Wilkes Land Basin (Antarctica) Macrì, P. Sagnotti, L. Dinarès-Turell, J. Caburlotto, A. Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Caburlotto, A.; INOGS - Borgo Grotta Gigante 42/c, Sgonico (TS) Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia INOGS - Borgo Grotta Gigante 42/c, Sgonico (TS) 2005 http://hdl.handle.net/2122/3572 https://doi.org/10.1016/j.pepi.2005.03.004 en eng Elsevier Physics of the Earth and Planetary Interiors / 151 (2005) Banerjee, S.K., King, J., Marvin, J., 1981. A rapid method for magnetic granulometry with applications to environmental studies. Geophys. Res. Lett. 8, 333–336. Benson, L.V., Liddicoat, J.C., Smoot, J.P., Sarna-Wojcicki, A., Negrini, R.M., Lund, S.P., 2003. The age of the Mono Lake excursion. Quat. Sci. Rev. 22, 135–140. Bindoff, N.L., Rosenberg, M.A., Warner, M.J., 2000. On the circulation and water masses over the Antarctic continental slope and rise between 80 and 150◦E. Deep-Sea Res. II 47, 2299– 2326. Biswas, D.K., Hyodo, M., Taniguchi, Y., Kaneko, M., Katoh, S., Sato, H., Kinugasa, Y., Mizuno, K., 1999. Magnetostratigraphy of Plio-Pleistocene sediments in a 1700-m core from Osaka Bay, southwestern Japan and short geomagnetic events in the middle Matuyama and early Brunhes chrons. Palaeogeogr. Palaeoclimatol. Palaeoecol. 148, 233–248. Brachfeld, S., Domack, E.W., Kissel, C., Laj, C., Leventer, A., Ishman, S.E., Gilbert, R., Camerlenghi, A., Eglinton, L.B., 2003. Holocene history of the Larsen ice shelf constrained by geomagnetic paleointensity dating. Geology 31, 749–752. Brachfeld, S., Kissel, C., Laj, C., Mazaud, A., 2004. Viscous behavior of U-channels during acquisition and demagnetization of remanences: implications for paleomagnetic and rock-magnetic investigations. Phys. Earth Planet. Int. 145, 1–8. Brancolini, G., Harris, P.T., 2000. Post Cruise Report AGSO Survey 217: Joint Italian/Australian Marine Geoscienze Expedition Aboard the R.V. Tangaroa to the Geotge Vth Land Region of East Antartica during February–March 2000. Australian National Antarctic Research Expeditions Project No. 1044. Wilkes Land Glacial History (WEGA), AGSO Record. Busetti, M., Caburlotto, A., Armand, L., Damiani, D., Giorgetti, G., Lucchi, R.G., Quilty, P.G., Villa, G., 2003. Plio-Quaternary sedimentation on the Wilkes Land continental rise: preliminary results. Deep-Sea Res. II 50, 1529–1562. Caburlotto, A., Macr`ı, P., Damiani, D., Giorgetti, G., Busetti, M., Villa, G., Lucchi, R.G., 2003. Piston cores from the Wilkes Land rise: data and considerations. Terra Antartica Rep. 9, 63–68. Caburlotto, A., 2003. Processi sedimentari di mare profondo sul Margine Continentale Glaciale Antartico. Ph.D. Thesis. University of Siena, Dottorato di Ricerca in Scienze Polari, XVI Ciclo, 16 dicembre 2003, 143 pp. Champion, D.E., Lanphere, M.A., Kuntz, M.A., 1988. Evidence for a new geomagnetic reversal from lava flows in Idaho: discussion of short polarity reversals in the Brunhes and late Matuyama polarity chrons. J. Geophys. Res. 93, 11667– 11680. Channell, J.E.T., Hodell, D.A., Lehman, B., 1997. Relative geomagnetic paleointensity and 18O at ODP Site 983 (Gardar Drift, North Atlantic) since 350 ka. Earth Planet. Sci. Lett. 153, 103–118. Channell, J.E.T., Stoner, J.S., Hodell, D.A., Charles, C.D., 2000. Geomagnetic paleointensity for the last 100 kyr from the subantarctic South Atlantic: a tool for inter-hemispheric correlation. Earth Planet. Sci. Lett. 175, 145–160. Channel, J.E.T., Curtis, J.H., Flower, B.P., 2004. 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A comparison of different techniques for relative paleointensity. Geophys. Res. Lett. 25, 89–92. Yamazaki, T., Ioka, N., Eguchi, N., 1995. Relative paleointensity of the geomagnetic field during the Brunhes Chron. Earth Planet. Sci. Lett. 136, 525–540. http://hdl.handle.net/2122/3572 doi:10.1016/j.pepi.2005.03.004 restricted Paleomagnetism Relative paleointensity Geomagnetic excursions Antarctica Brunhes Chron 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field article 2005 ftingv https://doi.org/10.1016/j.pepi.2005.03.004 https://doi.org/10.1029/2002GL014927 2022-07-29T06:04:49Z We report high-resolution paleomagnetic records obtained from six piston cores recovered on the continental rise of theWilkes Land Basin (WLB), East Antarctica, in the frame of the Italian/Australian Wilkes Land Glacial History (WEGA) project. The studied cores, with a length of ca. 4m each, were collected from the gentle and steep sides of sedimentary ridges present in the lower part of the continental rise, and consist of very fine-grained sediments. Paleomagnetic measurements were carried out on u-channel samples. Apart from a low-coercivity magnetic overprint, removed after the first steps of alternating field demagnetization, each core is characterized by a well defined characteristic remanent magnetization. Paleomagnetic inclinations fluctuate around the expected value (of ca. −77◦) for such high latitude sites and always indicate normal magnetic polarity. Short period oscillations to anomalously shallow paleomagnetic inclinations (up to −20◦) were identified at different levels of the sampled sequences; positive (reverse) inclination values were however not observed. Specific rock magnetic measurements indicate a substantial homogeneity of the magnetic mineralogy in the sampled sequences. For each core we reconstructed curves of relative paleointensity (RPI, as computed by NRM20mT/κ and NRM20mT/ARM20mT) variation of the geomagnetic field. An original age modelwas established by tuning the individual RPI curves with the available global and regional reference RPI stacks. Paleomagnetic results, supported by other limited bio- and chronostratigraphic constraints, establish that all the cores are Late Pleistocene in age: two provide an expanded record of the last ca. 30 ka (PC18 and PC19), three span the last ca. 100, 200 and 300 ka (respectively, PC25, PC27 and PC26), and one reaches back to ca. 780 ka (PC20), approaching the Brunhes–Matuyama transition. Thus, the WEGA paleomagnetic record provides the first experimental data documenting the dynamics and amplitude of the geomagnetic field variations at high ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica Wilkes Land Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Wega ENVELOPE(144.000,144.000,-65.250,-65.250) Physics of the Earth and Planetary Interiors 151 3-4 223 242 |