Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica
Reconstructions are presented documenting the relative motion of the Australia. Antarctic and Pacific plates since Chron 27 (61.1 Ma). In addition to the motion of the major plates, the reconstructions show the relative motion between East and West Antarctica and the continental fragments that make...
Main Authors: | , |
---|---|
Other Authors: | , , |
Format: | Book Part |
Language: | unknown |
Published: |
American Geophysical Union
2004
|
Subjects: | |
Online Access: | https://doi.org/10.1029/151GM02 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:05dv0-z5h44 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:05dv0-z5h44 2024-06-23T07:46:22+00:00 Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica Cande, Steven C. Stock, Joann M. Exon, N. F. Kennett, James P. Malone, Mitchell J. 2004 https://doi.org/10.1029/151GM02 unknown American Geophysical Union https://doi.org/10.1029/151GM02 oai:authors.library.caltech.edu:05dv0-z5h44 eprintid:45231 resolverid:CaltechAUTHORS:20140425-125510082 info:eu-repo/semantics/openAccess Other Geology Structural—Antarctic Ocean Paleoclimatology—Cenozoic Climatic changes—Antarctic Ocean Antarctic Ocean—Climate Marine sediments—Antarctic Ocean info:eu-repo/semantics/bookPart 2004 ftcaltechauth https://doi.org/10.1029/151GM02 2024-06-12T03:42:43Z Reconstructions are presented documenting the relative motion of the Australia. Antarctic and Pacific plates since Chron 27 (61.1 Ma). In addition to the motion of the major plates, the reconstructions show the relative motion between East and West Antarctica and the continental fragments that make up the South Tasman Rise. Recent observations that are used in making these reconstructions include the mapping of seafloor spreading magnetic anomalies in the Adare basin, northeast of Cape Adare, which recorded roughly 150 km of opening between East and West Antarctica between Chrons 20 (43.8 Ma) and 8 (26.6 Ma). In addition, magnetic and bathymetric observations from the lselin Rift, northeast of the Iselin Bank, and from the Emerald Fracture Zone, along the western boundary of Pacific-Antarctic spreading, document the rotation of the Iselin Bank between Chrons 27 and 24 (53.3 Ma). Our reconstructions indicate that there was a total of about 200 km of separation between East and West Antarctica in the northern Ross Sea region in the Cenozoic. These reconstructions document the development of a deep-water passageway between Australia and Antarctica as the South Tasman Rise clears the final piece of the Antarctic continental margin around Chron 13 (33.5 Ma). © 2004 American Geophysical Union. We thank Rob Larter and Carmen Gaina for their helpful reviews and Neville Exon for hi editorial suggestions. GMT software was used to produce the figures [Wessel and Smith, 1991]. This research was supported by NSF grant OPP-0126340 (UCSD) and OPP-0126334 (Caltech). California Institute of Technology Division of Geological and Planetary Science contribution number 8956. Published - Stock_2004p5.pdf Book Part Antarc* Antarctic Antarctic Ocean Antarctica Ross Sea West Antarctica Caltech Authors (California Institute of Technology) Adare ENVELOPE(170.233,170.233,-71.283,-71.283) Adare Basin ENVELOPE(175.000,175.000,-71.000,-71.000) Antarctic Antarctic Ocean Cape Adare ENVELOPE(175.000,175.000,-71.000,-71.000) Emerald Fracture Zone ENVELOPE(170.000,170.000,-62.000,-62.000) Gaina ENVELOPE(15.000,15.000,65.800,65.800) Iselin Bank ENVELOPE(-179.000,-179.000,-72.500,-72.500) New Zealand Pacific Ross Sea South Tasman Rise ENVELOPE(148.000,148.000,-47.500,-47.500) The Antarctic West Antarctica 5 17 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
Geology Structural—Antarctic Ocean Paleoclimatology—Cenozoic Climatic changes—Antarctic Ocean Antarctic Ocean—Climate Marine sediments—Antarctic Ocean |
spellingShingle |
Geology Structural—Antarctic Ocean Paleoclimatology—Cenozoic Climatic changes—Antarctic Ocean Antarctic Ocean—Climate Marine sediments—Antarctic Ocean Cande, Steven C. Stock, Joann M. Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica |
topic_facet |
Geology Structural—Antarctic Ocean Paleoclimatology—Cenozoic Climatic changes—Antarctic Ocean Antarctic Ocean—Climate Marine sediments—Antarctic Ocean |
description |
Reconstructions are presented documenting the relative motion of the Australia. Antarctic and Pacific plates since Chron 27 (61.1 Ma). In addition to the motion of the major plates, the reconstructions show the relative motion between East and West Antarctica and the continental fragments that make up the South Tasman Rise. Recent observations that are used in making these reconstructions include the mapping of seafloor spreading magnetic anomalies in the Adare basin, northeast of Cape Adare, which recorded roughly 150 km of opening between East and West Antarctica between Chrons 20 (43.8 Ma) and 8 (26.6 Ma). In addition, magnetic and bathymetric observations from the lselin Rift, northeast of the Iselin Bank, and from the Emerald Fracture Zone, along the western boundary of Pacific-Antarctic spreading, document the rotation of the Iselin Bank between Chrons 27 and 24 (53.3 Ma). Our reconstructions indicate that there was a total of about 200 km of separation between East and West Antarctica in the northern Ross Sea region in the Cenozoic. These reconstructions document the development of a deep-water passageway between Australia and Antarctica as the South Tasman Rise clears the final piece of the Antarctic continental margin around Chron 13 (33.5 Ma). © 2004 American Geophysical Union. We thank Rob Larter and Carmen Gaina for their helpful reviews and Neville Exon for hi editorial suggestions. GMT software was used to produce the figures [Wessel and Smith, 1991]. This research was supported by NSF grant OPP-0126340 (UCSD) and OPP-0126334 (Caltech). California Institute of Technology Division of Geological and Planetary Science contribution number 8956. Published - Stock_2004p5.pdf |
author2 |
Exon, N. F. Kennett, James P. Malone, Mitchell J. |
format |
Book Part |
author |
Cande, Steven C. Stock, Joann M. |
author_facet |
Cande, Steven C. Stock, Joann M. |
author_sort |
Cande, Steven C. |
title |
Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica |
title_short |
Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica |
title_full |
Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica |
title_fullStr |
Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica |
title_full_unstemmed |
Cenozoic Reconstructions of the Australia-New Zealand-South Pacific Sector of Antarctica |
title_sort |
cenozoic reconstructions of the australia-new zealand-south pacific sector of antarctica |
publisher |
American Geophysical Union |
publishDate |
2004 |
url |
https://doi.org/10.1029/151GM02 |
long_lat |
ENVELOPE(170.233,170.233,-71.283,-71.283) ENVELOPE(175.000,175.000,-71.000,-71.000) ENVELOPE(175.000,175.000,-71.000,-71.000) ENVELOPE(170.000,170.000,-62.000,-62.000) ENVELOPE(15.000,15.000,65.800,65.800) ENVELOPE(-179.000,-179.000,-72.500,-72.500) ENVELOPE(148.000,148.000,-47.500,-47.500) |
geographic |
Adare Adare Basin Antarctic Antarctic Ocean Cape Adare Emerald Fracture Zone Gaina Iselin Bank New Zealand Pacific Ross Sea South Tasman Rise The Antarctic West Antarctica |
geographic_facet |
Adare Adare Basin Antarctic Antarctic Ocean Cape Adare Emerald Fracture Zone Gaina Iselin Bank New Zealand Pacific Ross Sea South Tasman Rise The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Ross Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Ross Sea West Antarctica |
op_relation |
https://doi.org/10.1029/151GM02 oai:authors.library.caltech.edu:05dv0-z5h44 eprintid:45231 resolverid:CaltechAUTHORS:20140425-125510082 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1029/151GM02 |
container_start_page |
5 |
op_container_end_page |
17 |
_version_ |
1802645498491830272 |