Clay mineralogy on five NBP cores
During 2006, the SHALDRIL program recovered cores of Eocene through Pliocene material at four locations in the northwestern Weddell Sea, each representing a key period in the evolution of the Antarctic Peninsula ice cap. The recovered cores are not continuous, yet they provide a record of climate ch...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.777615 2024-09-15T17:42:32+00:00 Clay mineralogy on five NBP cores Wellner, Julia S Anderson, John B Ehrmann, Werner Weaver, Fred M Kirshner, Alexandra E Livsey, Daniel Simms, Alexander R MEDIAN LATITUDE: -63.407730 * MEDIAN LONGITUDE: -52.915730 * SOUTH-BOUND LATITUDE: -63.847683 * WEST-BOUND LONGITUDE: -54.653450 * NORTH-BOUND LATITUDE: -63.251500 * EAST-BOUND LONGITUDE: -52.365650 * DATE/TIME START: 2006-03-13T00:00:00 * DATE/TIME END: 2006-04-01T00:00:00 2012 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.777615 https://doi.org/10.1594/PANGAEA.777615 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.777615 https://doi.org/10.1594/PANGAEA.777615 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Wellner, Julia S; Anderson, John B; Ehrmann, Werner; Weaver, Fred M; Kirshner, Alexandra E; Livsey, Daniel; Simms, Alexander R (2011): History of an evolving ice sheet as recorded in SHALDRIL cores from the Northwestern Weddell Sea, Antarctica. In: Anderson, J.B. & Wellner, J.S. (eds.), Tectonic, Climatic, and Cryospheric Evolution of the Antarctic Peninsula, American Geophysical Union Special Publications, 63, 131-151, https://doi.org/10.1029/2010SP001047 DRILL Drilling/drill rig Joinville Plateau Nathaniel B. Palmer NBP0602A NBP0602A-12A NBP0602A-3C NBP0602A-5D NBP0602A-6C NBP0602A-6D Northern James Ross Basin SHALDRIL II dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.77761510.1029/2010SP001047 2024-07-24T02:31:21Z During 2006, the SHALDRIL program recovered cores of Eocene through Pliocene material at four locations in the northwestern Weddell Sea, each representing a key period in the evolution of the Antarctic Peninsula ice cap. The recovered cores are not continuous, yet they provide a record of climate change with samples from the late Eocene, late Oligocene, middle Miocene, and early Pliocene and represent the only series of samples recovered from the northwestern Weddell Sea and spanning the Cenozoic and the initial growth of the peninsula ice cap. Late Eocene sediments sampled in the James Ross Basin are typically characterized by very dark greenish-gray muddy fine sand with some preserved burrowing and are interpreted to represent a shallow water continental shelf setting. Rare dropstones, primarily of well-cemented sandstones and minor ice-rafted material consisting of angular grains with glacially influenced surface features record the onset of mountain glaciation, the earliest such evidence in the region. The remaining cores were collected on the Joinville Plateau to the north of the James Ross Basin. The late Oligocene sediments consist of dark gray sandy mud with some clay lenses and many burrows, likely representing a distal delta or shelf setting. This core contains only very few and small dropstones, and the individual grains show decreased angularity and fewer glacial surface features relative to late Eocene deposits. The middle Miocene strata are composed of pebbly gray diamicton, representing proximal glacimarine sediments. The lower Pliocene section also contains many ice-rafted pebbles but is dominated by sandy units rather than diamicton and is interpreted to represent a current-winnowed deposit, similar to the modern contour current-influenced sediments of the region. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Ice cap Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-54.653450,-52.365650,-63.251500,-63.847683) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
DRILL Drilling/drill rig Joinville Plateau Nathaniel B. Palmer NBP0602A NBP0602A-12A NBP0602A-3C NBP0602A-5D NBP0602A-6C NBP0602A-6D Northern James Ross Basin SHALDRIL II |
spellingShingle |
DRILL Drilling/drill rig Joinville Plateau Nathaniel B. Palmer NBP0602A NBP0602A-12A NBP0602A-3C NBP0602A-5D NBP0602A-6C NBP0602A-6D Northern James Ross Basin SHALDRIL II Wellner, Julia S Anderson, John B Ehrmann, Werner Weaver, Fred M Kirshner, Alexandra E Livsey, Daniel Simms, Alexander R Clay mineralogy on five NBP cores |
topic_facet |
DRILL Drilling/drill rig Joinville Plateau Nathaniel B. Palmer NBP0602A NBP0602A-12A NBP0602A-3C NBP0602A-5D NBP0602A-6C NBP0602A-6D Northern James Ross Basin SHALDRIL II |
description |
During 2006, the SHALDRIL program recovered cores of Eocene through Pliocene material at four locations in the northwestern Weddell Sea, each representing a key period in the evolution of the Antarctic Peninsula ice cap. The recovered cores are not continuous, yet they provide a record of climate change with samples from the late Eocene, late Oligocene, middle Miocene, and early Pliocene and represent the only series of samples recovered from the northwestern Weddell Sea and spanning the Cenozoic and the initial growth of the peninsula ice cap. Late Eocene sediments sampled in the James Ross Basin are typically characterized by very dark greenish-gray muddy fine sand with some preserved burrowing and are interpreted to represent a shallow water continental shelf setting. Rare dropstones, primarily of well-cemented sandstones and minor ice-rafted material consisting of angular grains with glacially influenced surface features record the onset of mountain glaciation, the earliest such evidence in the region. The remaining cores were collected on the Joinville Plateau to the north of the James Ross Basin. The late Oligocene sediments consist of dark gray sandy mud with some clay lenses and many burrows, likely representing a distal delta or shelf setting. This core contains only very few and small dropstones, and the individual grains show decreased angularity and fewer glacial surface features relative to late Eocene deposits. The middle Miocene strata are composed of pebbly gray diamicton, representing proximal glacimarine sediments. The lower Pliocene section also contains many ice-rafted pebbles but is dominated by sandy units rather than diamicton and is interpreted to represent a current-winnowed deposit, similar to the modern contour current-influenced sediments of the region. |
format |
Other/Unknown Material |
author |
Wellner, Julia S Anderson, John B Ehrmann, Werner Weaver, Fred M Kirshner, Alexandra E Livsey, Daniel Simms, Alexander R |
author_facet |
Wellner, Julia S Anderson, John B Ehrmann, Werner Weaver, Fred M Kirshner, Alexandra E Livsey, Daniel Simms, Alexander R |
author_sort |
Wellner, Julia S |
title |
Clay mineralogy on five NBP cores |
title_short |
Clay mineralogy on five NBP cores |
title_full |
Clay mineralogy on five NBP cores |
title_fullStr |
Clay mineralogy on five NBP cores |
title_full_unstemmed |
Clay mineralogy on five NBP cores |
title_sort |
clay mineralogy on five nbp cores |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.777615 https://doi.org/10.1594/PANGAEA.777615 |
op_coverage |
MEDIAN LATITUDE: -63.407730 * MEDIAN LONGITUDE: -52.915730 * SOUTH-BOUND LATITUDE: -63.847683 * WEST-BOUND LONGITUDE: -54.653450 * NORTH-BOUND LATITUDE: -63.251500 * EAST-BOUND LONGITUDE: -52.365650 * DATE/TIME START: 2006-03-13T00:00:00 * DATE/TIME END: 2006-04-01T00:00:00 |
long_lat |
ENVELOPE(-54.653450,-52.365650,-63.251500,-63.847683) |
genre |
Antarc* Antarctic Antarctic Peninsula Ice cap Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice cap Weddell Sea |
op_source |
Supplement to: Wellner, Julia S; Anderson, John B; Ehrmann, Werner; Weaver, Fred M; Kirshner, Alexandra E; Livsey, Daniel; Simms, Alexander R (2011): History of an evolving ice sheet as recorded in SHALDRIL cores from the Northwestern Weddell Sea, Antarctica. In: Anderson, J.B. & Wellner, J.S. (eds.), Tectonic, Climatic, and Cryospheric Evolution of the Antarctic Peninsula, American Geophysical Union Special Publications, 63, 131-151, https://doi.org/10.1029/2010SP001047 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.777615 https://doi.org/10.1594/PANGAEA.777615 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.77761510.1029/2010SP001047 |
_version_ |
1810489134199865344 |