The Somerset Dam igneous complex : a preliminary account

McLeod, Ian Roderick The Somerset Dam igneous complex : a preliminary account. Brisbane: University of Queensland Press, 1959.

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Author McLeod, Ian Roderick
Title The Somerset Dam igneous complex : a preliminary account
Language of Title eng
Place of Publication Brisbane
Publisher University of Queensland Press
Publication year 1959
Sub-type Research book (original research)
Open Access Status File (Publisher version)
Volume 5
Series Papers (University of Queensland. Dept. of Geology) ; v. V no. 3.
Language eng
Total number of pages 38
Subjects 260100 Geology
Formatted Abstract/Summary

In the hills west of Somerset Dam, a gabbro-red rock complex is emplaced in the Lower Triassic Neara Volcanics. The gabbroic portion is plug-like, and is mainly olivine gabbro with a horizon of banded troctolite. The upper part is quartz gabbro, with micropegmatite in the topmost portion.

The red rock is not a direct differentiate of the gabbro exposed. The main part at least, is magmatic in origin and was emplaced slightly later than the gabbro. It consists of quartz and perthite, often intergrown, with iron ore a common accessory.

The metamorphic effects due to these two rock types are compared and contrasted.

Quartz diorite and felsite dykes around the gabbro and red rock are thought to be part of the complex.

Keyword Geology -- Queensland -- Somerset Dam Region
Q-Index Code AX
Q-Index Status Provisional Code
Institutional Status UQ

 
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