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Basement and crustal structure of the Davis Sea region (East Antarctica): implications for tectonic setting and continent to oceanic boundary definition

Open-File Report 2007-1047-SRP-025
By: , , , and 
https://doi.org/10.3133/ofr20071047SRP025

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Abstract

This study is based on about 8400 km of MCS, magnetic and gravity data as well as 20 sonobuoys collected by the Russian Antarctic Expedition during 2003 and 2004 in the Davis Sea and adjacent areas between 80°E and 102°E. Major tectonic provinces and features are identified and mapped in the study region including: 1) A marginal rift with a the extended continental crust ranging 130 to more than 200 km in width; 2) The marginal volcanic plateau of the Bruce Bank consisting of the Early Cretaceous igneous rocks; 3) The Early Cretaceous and Late Cretaceous−Paleogene oceanic basins; and 4) The Early Cretaceous igneous province of the Kerguelen Plateau. Four major horizons identified in the sedimentary cover of the Davis Sea region are attributed to main tectonic events and/or paleoenvironmental changes.

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Publication type Report
Publication Subtype USGS Numbered Series
Title Basement and crustal structure of the Davis Sea region (East Antarctica): implications for tectonic setting and continent to oceanic boundary definition
Series title Open-File Report
Series number 2007-1047-SRP-025
DOI 10.3133/ofr20071047SRP025
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
Google Analytic Metrics Metrics page
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