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II.—Notes on the Petrology of a Portion of the North Kalgoorlie Field

Published online by Cambridge University Press:  01 May 2009

R. A. Farquharson
R. A. Farquharson
Affiliation:
Petrologist to the Mines Department of Western Australia.
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Extract

From the foregoing analyses there is little doubt that the rock is a hornblende-quartz-keratophyre. The term porphyrite, however, has been adopted in the mapping for convenience. It is worthy of note that a very similar rock, though greenish in colour, has been already described from Kanowna by the writer. In the latter, silica amounted to more than 71 per cent, while soda reached 7.85 per cent; potash was again absent.

12237, G.M.L. 4458 E., Hyman North.

Type
Original Articles
Information
Geological Magazine , Volume 1 , Issue 4 , April 1914 , pp. 148 - 157
Copyright
Copyright © Cambridge University Press 1914

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References

page 148 note 1 Bulletin No. 47 G.S.W.A., Petrological Notes, p. 71.

page 148 note 2 M.G. = a weathered brownish rock. S. = minerals: felspar, quartz, chlorite, sericite, and iron-ore.

page 154 note 1 Bulletin No. 43, G.S.W.A.: Observations on some Rocks from Ingliston, Extended Mine, Meekatharra. Also Bull. No. 47, G.S.W.A., Petrological Notes, p. 92.

page 155 note 1 Beck, The Nature of Ore-deposits, vol. ii, p. 426.

page 157 note 1 Harker, Natural History of Igneous Rocks.