Granitic rocks of the Campbell—Priestley divide, Northern Victoria Land, Antarctica

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Abstract
Three major rock units are present in the ridge system between the Campbell and Priestley Glaciers: (1) Upper Tertiary to Quaternary alkaline volcanic rocks, all included in the McMurdo Volcanic Group; (2) Jurassic flows and sills (the Ferrar Group) with interbedded sediments (the Beacon Group); and (3) a basement complex consisting of ?Precambrian schist (Priestley Formation) intruded by Paleozoic granite plutons (Granite Harbour Intrusive Complex). The granitic rocks of the basement complex are described in this paper. The Granite Harbour Intrusive Complex in the Campbell—Priestley Divide consists of high-level unfoliated post-tectonic plutons of varying size. Five new units are recognised: Dickason Granite (oldest), Corner Tonalite, Northern Foothills Granite, Capsize Adamellite, and Recoil Granite (youngest). The three largest plutons are all of granitic composition, and more basic lithologies either occur in small plutons or are completely absent.

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