A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101)
A high-resolution paleomagnetic record for part of the Matuyama chron (0.7^2.1 Ma) is reported for Ocean Drilling Program Site 1101 (Leg 178), off the Antarctic Peninsula Pacific margin. A rock-magnetic investigation of 62 discrete samples revealed that the natural remanent magnetization (NRM) is ca...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.2099 http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.494.2099 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.494.2099 2023-05-15T13:44:18+02:00 A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) Yohan Guyodo A Gary D. Acton B Stefanie Brachfeld C James E. T. Channell A The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.2099 http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.2099 http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf paleomagnetism magnetostratigraphy magnetic intensity Antarctic Peninsula text ftciteseerx 2016-01-08T08:40:49Z A high-resolution paleomagnetic record for part of the Matuyama chron (0.7^2.1 Ma) is reported for Ocean Drilling Program Site 1101 (Leg 178), off the Antarctic Peninsula Pacific margin. A rock-magnetic investigation of 62 discrete samples revealed that the natural remanent magnetization (NRM) is carried by pseudo-single domain magnetite. Progressive alternating field demagnetization of 83 m of U-channels provided a polarity stratigraphy down to the Olduvai subchron. Two geomagnetic events preceding the Jaramillo subchron were identified, including the Cobb Mountain polarity interval. The bulk magnetic parameters vary by more than a factor of 20 over the entire time interval, but by less than a factor of 6 over the 0.7^1.1 Ma interval. This latter interval was selected for paleointensity determinations, which were carried out by normalizing the NRM by the anhysteretic remanent magnetization (ARM). Direct comparison of the Site 1101 paleointensity record with other curves available for the same time interval suggests a geomagnetic origin for features present in the record. A more quantitative comparison was achieved by means of a jackknife test performed on nine records of relative paleointensity over the 0.95^1.1 Ma interval. This test yielded no outlier for the period considered, confirming the geomagnetic character of the records. We have constructed a low-resolution stack revealing some of the characteristic paleointensity features of the Jaramillo subchron. ß 2001 Elsevier Science B.V. All rights reserved. Text Antarc* Antarctic Antarctic Peninsula Unknown Antarctic Antarctic Peninsula Pacific The Antarctic |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
paleomagnetism magnetostratigraphy magnetic intensity Antarctic Peninsula |
spellingShingle |
paleomagnetism magnetostratigraphy magnetic intensity Antarctic Peninsula Yohan Guyodo A Gary D. Acton B Stefanie Brachfeld C James E. T. Channell A A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) |
topic_facet |
paleomagnetism magnetostratigraphy magnetic intensity Antarctic Peninsula |
description |
A high-resolution paleomagnetic record for part of the Matuyama chron (0.7^2.1 Ma) is reported for Ocean Drilling Program Site 1101 (Leg 178), off the Antarctic Peninsula Pacific margin. A rock-magnetic investigation of 62 discrete samples revealed that the natural remanent magnetization (NRM) is carried by pseudo-single domain magnetite. Progressive alternating field demagnetization of 83 m of U-channels provided a polarity stratigraphy down to the Olduvai subchron. Two geomagnetic events preceding the Jaramillo subchron were identified, including the Cobb Mountain polarity interval. The bulk magnetic parameters vary by more than a factor of 20 over the entire time interval, but by less than a factor of 6 over the 0.7^1.1 Ma interval. This latter interval was selected for paleointensity determinations, which were carried out by normalizing the NRM by the anhysteretic remanent magnetization (ARM). Direct comparison of the Site 1101 paleointensity record with other curves available for the same time interval suggests a geomagnetic origin for features present in the record. A more quantitative comparison was achieved by means of a jackknife test performed on nine records of relative paleointensity over the 0.95^1.1 Ma interval. This test yielded no outlier for the period considered, confirming the geomagnetic character of the records. We have constructed a low-resolution stack revealing some of the characteristic paleointensity features of the Jaramillo subchron. ß 2001 Elsevier Science B.V. All rights reserved. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Yohan Guyodo A Gary D. Acton B Stefanie Brachfeld C James E. T. Channell A |
author_facet |
Yohan Guyodo A Gary D. Acton B Stefanie Brachfeld C James E. T. Channell A |
author_sort |
Yohan Guyodo A |
title |
A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) |
title_short |
A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) |
title_full |
A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) |
title_fullStr |
A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) |
title_full_unstemmed |
A sedimentary paleomagnetic record of the Matuyama chron from the Western Antarctic margin (ODP Site 1101) |
title_sort |
sedimentary paleomagnetic record of the matuyama chron from the western antarctic margin (odp site 1101) |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.2099 http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf |
geographic |
Antarctic Antarctic Peninsula Pacific The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Pacific The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.2099 http://paleomag.geology.ucdavis.edu/research/acton/Publications/2001_Guyodo_EPSL.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766199934584881152 |