Call number:
ZSP-164-35
In:
A magnetic survey of North-East Trinity Peninsula, Graham Land
Description / Table of Contents:
An area of about 200 square miles, covering Tabarin Peninsula and Duse Bay in the north-eastern part of the Graham Land peninsula, has been surveyed with a vertical intensity magnetometer, with the object of delineating bodies of the Andean Intrusive Suite and determining the nature of the contact between the mid-Miocene James Ross Island Volcanic Group and the ? Carboniferous sediments of the Trinity Peninsula Series. The outcrops of intrusive diorite in the northern half of Tabarin Peninsula are shown to be parts of a single intrusive body, extending over the width of the peninsula and as far south as the volcanic outcrops of Buttress Hill and Brown Bluff and northward at least as far as Mount Taylor and Blade Ridge. Three configurations of the intrusive body which explain the observed magnetic anomalies are given; the most likely from the intrusion is that of a laccolith. The magnetic anomalies over the volcanic rocks are attributed to basalt lava flows of both normal and reversed magnetizations. Some evidence is given which suggests that the James Ross Island Volcanic Group is at least 4,000 ft. thick, but it has not been possible to determine the nature of the contact between the volcanics and the sediments in southern Tabarin Peninsula or in Duse Bay.
Type of Medium:
Series available for loan
Pages:
35 S. : Ill., graph. Darst., Kt.
Series Statement:
35
URL:
http://www.antarctica.ac.uk/about_bas/publications/scientific_reports/index.php
Branch Library:
AWI Library
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