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The Precambrian rocks of Tasmania, Part I-Dolerites of the North-West Coast


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Spry, A (1957) The Precambrian rocks of Tasmania, Part I-Dolerites of the North-West Coast. Papers and Proceedings of the Royal Society of Tasmania, 91. pp. 81-96. ISSN 0080-4703

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At least 30 small bodies of dolerite have been
found intruding sediments of the Pre-Cambrian
Rocky Cape Group along the coast between Sulphur
Creek and Crayfish Creek. The igneous bodies are
chiefly sills although dykes also occur. The
dolerites are characterized by strong deuteric alteration
which led to the formation of secondary
tremolite-actinolite, chlorite, zoisite, albite, calcite,
sericite, sphene, leucoxene, serpentine, and prehnite.
These rocks show petrological and chemical affinities
with dolerites of a similar age in Western
and South Australia. They have certain features
in common with the lavas of the Cambrian Dundas
Group, but the possibility that these bodies acted
as feeders to the flows is discounted on structural
and chemical grounds.

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. 81-96
ISSN: 0080-4703
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:

Copyright Royal Society of Tasmania

Date Deposited: 24 May 2012 08:05
Last Modified: 18 Nov 2014 04:35
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