The petrology of a differentiated teschenite sill near Gunnedah, New South Wales

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ID: 295123
1958
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Abstract
A detailed study of modal and textural variations within the rock series, compositional changes within the principal mineral series, and the trends of major and minor elements in the rocks and minerals leads to the conclusion that fractional crystallization in place, rather than gravity accumulation, was the mechanism responsible for formation of the Tertiary teschenite sill southwest of Gunnedah, New South Wales. The sill consists of porphyritic and ophitic teschenites which grade upward into gabbro-type teschenites. Olivine decreases and clinopyroxene and iron ores increase progressively upward in the sill.
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Authors J. F. G. Wilkinson
Journal american journal of science
Year 1958
DOI
10.2475/ajs.256.1.1
URL
https://ajs.scholasticahq.com/article/58684.pdf
Keywords Keywords not found

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