Geological position and isotopic age of intrusive charnockitic rocks in the Jennings Promontory (Eastern Wall of the Amery Glacier, East Antarctica)

Intrusive hypersthene granitoids (charnockitic rocks) are widespread in the mountainous system bordering the Lambert Glacier with the worlds largest outlet and Amery Ice Shelf continuing in East Antarctica. In the eastern margin of the Amery Ice Shelf, they constitute large bedrock outcrops in the J...

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Bibliographic Details
Published in:Doklady earth sciences 2009-08, Vol.427 (2), p.920-923
Main Authors: Kamenev, I. A., Glebovitskii, V. A., Kotov, A. B., Sal’nikova, E. B., Yakovleva, S. Z., Plotkina, Yu. V., Fedoseenko, A. M.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Geology
Glaciers
Ice shelves
Isotopes
Rocks
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Summary:Intrusive hypersthene granitoids (charnockitic rocks) are widespread in the mountainous system bordering the Lambert Glacier with the worlds largest outlet and Amery Ice Shelf continuing in East Antarctica. In the eastern margin of the Amery Ice Shelf, they constitute large bedrock outcrops in the Jennings Promontory (approximately 6 km2) and Branstetter Rocks (approximately 0.7 km2) and several outcrops approximately 9.5 km2 in total in Gillock Island (Fig. 1). These outcrops of charnockitic rocks most likely characterize a relatively large massif, which extends in the north-easterly direction and occupies an area of at least 140 km2 in size.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X09060075