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Geology of the Trial Harbour district


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Green, TH (1966) Geology of the Trial Harbour district. Papers and Proceedings of the Royal Society of Tasmania, 100. pp. 1-24. ISSN 0080-4703

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A Devonian (?) granite complex intrudes Cambrian (?) volcanics, serpentinised dunite (olivine Fo,), and siltstones and quartzites of the Precambrian (?) Oonah Quartzite and Slate and the Silurian Crotty Quartzite and Amber Slate Formations. The general trends of these country rocks are parallel to the granite margins. The complex is composed of grey, pink and white granites all with the same mineralogical composition (quartz, orthoclase dominant, plagioclase subordinate). The white granite commonly contains tourmaline nodular segregations, Emplacement began with the pink and grey granites, followed closely by the white granite, and finally the intrusion of minor bodies (porphyritic aplite, micro-granite, aplite, pegmatite, quartz-tourmaline dykes, pyroxene dyke) . Tourmaline is abundant in the later intrusions and is sometimes accompanied by cassiterite.

Item Type: Article
Keywords: Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library
Journal or Publication Title: Papers and Proceedings of the Royal Society of Tasmania
Page Range: pp. 1-24
ISSN: 0080-4703
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information: Copyright Royal Society of Tasmania
Date Deposited: 29 May 2012 03:47
Last Modified: 18 Nov 2014 04:37
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