Cenozoic environmental changes along the East Antarctic continental margin inferred from regional seismic stratigraphy
Open-File Report
2007-1047-SRP-005
By: G.L. Leitchenkov, Y.B. Guseva, and V.V. Gandyukhin
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Abstract
We interpret ~40,000 km of multichannelseismic reflection lines collected by the Russian Antarctic Expedition along the East Antarctic continental margin between 32° E and 115°
E, and present a revised seismic stratigraphic model for depositional paleoenvironments of the region. Variations in acoustic facies characteristics
observed across major seismic horizons are correlated with paleoenvironmental changes deciphered from Antarctic
drilling data and deep-sea “proxy” records. Our results, as well as otherstudies, indicate that the East Antarctic margin
was glaciated at different times. Glacial ice first reached the western Wilkes Land margin in the Middle Eocene and
then advanced onto most parts ofthe East Antarctic continentalshelf during the earliest Oligocene. During the
Neogene, bottom currents deposited a variety of drift deposits along the margin
Suggested Citation
Leitchenkov, G., Guseva, Y., and Gandyukhin, V., 2007, Cenozoic environmental changes along the East Antarctic continental margin inferred from regional seismic stratigraphy: U.S. Geological Survey Open-File Report 2007-1047-SRP-005, 4 p., https://doi.org/10.3133/ofr20071047SRP005.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Cenozoic environmental changes along the East Antarctic continental margin inferred from regional seismic stratigraphy |
| Series title | Open-File Report |
| Series number | 2007-1047-SRP-005 |
| DOI | 10.3133/ofr20071047SRP005 |
| Year Published | 2007 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 4 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007 |
| Other Geospatial | Antarctica |
| Additional Online Files (Y/N) | N |