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Aeromagnetic search for Cenozoic magmatism over the Admiralty Mountains Block (East Antarctica)

Open-File Report 2007-1047-SRP-075

By:
, , , , , ,
DOI: 10.3133/ofr20071047SRP075

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Abstract

Cenozoic magmatic rocks of the Transantarctic Mountains provide an important window on the tectonic and magmatic processes of the West Antarctic Rift System. Previous aeromagnetic investigations in northern Victoria Land have delineated Cenozoic volcanic and intrusive complexes assigned to the McMurdo Volcanic Group and Meander Intrusives over the Transantarctic Mountains. We present a new aeromagnetic anomaly map for the region north of the Mariner Glacier to study the extent and spatial distribution of these Cenozoic rocks over the previously unexplored Admiralty Mountains. The new map shows that the Meander Intrusives are restricted to the coastal region between the Malta Plateau and the Daniell Peninsula. However, the McMurdo Volcanic Group rocks extend further inland, and may delineate a hitherto unrecognised volcano-tectonic rift zone, extending as far north as the Trafalgar Glacier.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Aeromagnetic search for Cenozoic magmatism over the Admiralty Mountains Block (East Antarctica)
Series title:
Open-File Report
Series number:
2007-1047-SRP-075
DOI:
10.3133/ofr20071047SRP075
Year Published:
2007
Language:
English
Publisher:
U.S. Geological Society
Publisher location:
Reston, VA
Description:
4 p.
Larger Work Type:
Report
Larger Work Subtype:
USGS Numbered Series
Other Geospatial:
Antarctica
Additional Online Files(Y/N):
N