Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis
The ANtarctic Geologie DRILLing program (ANDRILL) drilled a sediment core from a sea ice platform in the Ross Sea in southern McMurdo Sound (SMS), Antarctica, in late 2007. The core site is located just to the east of the Transantarctic Mountains (TAM) along the western margin of a half graben and i...
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ftmontclairstuni:oai:digitalcommons.montclair.edu:etd-1882 2023-07-23T04:15:08+02:00 Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis Hauptvogel, Daniel William 2010-05-01T07:00:00Z application/pdf https://digitalcommons.montclair.edu/etd/880 https://digitalcommons.montclair.edu/context/etd/article/1882/viewcontent/Hauptvogel_Thesis_2010_Redacted.pdf unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/etd/880 https://digitalcommons.montclair.edu/context/etd/article/1882/viewcontent/Hauptvogel_Thesis_2010_Redacted.pdf Theses, Dissertations and Culminating Projects Earth Sciences Environmental Sciences text 2010 ftmontclairstuni 2023-07-03T21:56:42Z The ANtarctic Geologie DRILLing program (ANDRILL) drilled a sediment core from a sea ice platform in the Ross Sea in southern McMurdo Sound (SMS), Antarctica, in late 2007. The core site is located just to the east of the Transantarctic Mountains (TAM) along the western margin of a half graben and is a site of heavy sedimentation from the TAM, the East Antarctic Ice Sheet (EAIS), the McMurdo Volcanic Group (MVG), and the West Antarctic Ice Sheet (WAIS) and Ross Ice Shelf. The upper 650 m of the core were analyzed for heavy minerals in order to interpret ice sheet drainage patterns and dynamics of the past 17 Myr. Grain mounts of the fíne sand sized (63-250 pm) heavy mineral fraction of 23 intervals were created and approximately 300 grains were identified per slide. The data represents a major change in sediment provenance and indicates the Middle Miocene Climate Transition (MMCT), which was a cooling period 13.8-14.2 Ma. The period before the MMCT is represented by a invariant assemblage of heavy minerals in the interval 300 - 650 mbsf (15-17 Ma), especially static 350 - 550 mbsf, with a provenance of the Koettlitz and Ferrar Glaciers. This suggests a distal ice sheet relative to the SMS core site that is not providing any influence. Between 240 and 300 (13.8 - 15 Ma) mbsf, a change in provenance from local TAM to MVG and southern TAM occurred and mineral assemblages representing these source rocks are more abundant in the upper 240 m. This suggests a cooler environment in which the WAIS is expanding and forces transport and deposition of sediment by the EAIS from further south. This correlates well with clast provenance, wholerock geochemical data, and stratigraphic interpretations performed by other SMS team members. Text Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Sound Ross Ice Shelf Ross Sea Sea ice Montclair State University Digital Commons Antarctic The Antarctic Ross Sea West Antarctic Ice Sheet McMurdo Sound East Antarctic Ice Sheet Ross Ice Shelf Transantarctic Mountains |
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Montclair State University Digital Commons |
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Earth Sciences Environmental Sciences |
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Earth Sciences Environmental Sciences Hauptvogel, Daniel William Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis |
topic_facet |
Earth Sciences Environmental Sciences |
description |
The ANtarctic Geologie DRILLing program (ANDRILL) drilled a sediment core from a sea ice platform in the Ross Sea in southern McMurdo Sound (SMS), Antarctica, in late 2007. The core site is located just to the east of the Transantarctic Mountains (TAM) along the western margin of a half graben and is a site of heavy sedimentation from the TAM, the East Antarctic Ice Sheet (EAIS), the McMurdo Volcanic Group (MVG), and the West Antarctic Ice Sheet (WAIS) and Ross Ice Shelf. The upper 650 m of the core were analyzed for heavy minerals in order to interpret ice sheet drainage patterns and dynamics of the past 17 Myr. Grain mounts of the fíne sand sized (63-250 pm) heavy mineral fraction of 23 intervals were created and approximately 300 grains were identified per slide. The data represents a major change in sediment provenance and indicates the Middle Miocene Climate Transition (MMCT), which was a cooling period 13.8-14.2 Ma. The period before the MMCT is represented by a invariant assemblage of heavy minerals in the interval 300 - 650 mbsf (15-17 Ma), especially static 350 - 550 mbsf, with a provenance of the Koettlitz and Ferrar Glaciers. This suggests a distal ice sheet relative to the SMS core site that is not providing any influence. Between 240 and 300 (13.8 - 15 Ma) mbsf, a change in provenance from local TAM to MVG and southern TAM occurred and mineral assemblages representing these source rocks are more abundant in the upper 240 m. This suggests a cooler environment in which the WAIS is expanding and forces transport and deposition of sediment by the EAIS from further south. This correlates well with clast provenance, wholerock geochemical data, and stratigraphic interpretations performed by other SMS team members. |
format |
Text |
author |
Hauptvogel, Daniel William |
author_facet |
Hauptvogel, Daniel William |
author_sort |
Hauptvogel, Daniel William |
title |
Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis |
title_short |
Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis |
title_full |
Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis |
title_fullStr |
Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis |
title_full_unstemmed |
Ice Sheet Dynamics of the Past 17 Myr in Southern McMurdo Sound, Antarctica: A Heavy Mineral Analysis |
title_sort |
ice sheet dynamics of the past 17 myr in southern mcmurdo sound, antarctica: a heavy mineral analysis |
publisher |
Montclair State University Digital Commons |
publishDate |
2010 |
url |
https://digitalcommons.montclair.edu/etd/880 https://digitalcommons.montclair.edu/context/etd/article/1882/viewcontent/Hauptvogel_Thesis_2010_Redacted.pdf |
geographic |
Antarctic The Antarctic Ross Sea West Antarctic Ice Sheet McMurdo Sound East Antarctic Ice Sheet Ross Ice Shelf Transantarctic Mountains |
geographic_facet |
Antarctic The Antarctic Ross Sea West Antarctic Ice Sheet McMurdo Sound East Antarctic Ice Sheet Ross Ice Shelf Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Sound Ross Ice Shelf Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Sound Ross Ice Shelf Ross Sea Sea ice |
op_source |
Theses, Dissertations and Culminating Projects |
op_relation |
https://digitalcommons.montclair.edu/etd/880 https://digitalcommons.montclair.edu/context/etd/article/1882/viewcontent/Hauptvogel_Thesis_2010_Redacted.pdf |
_version_ |
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