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III.—Notes on the Petrology of a Portion of the North Kalgoorlie Field1
Published online by Cambridge University Press: 01 May 2009
Extract
The majority of the numerous papers that have already been published on the petrology of Kalgoorlie have dealt with the subject only in a more or less general way. Few investigators have hitherto devoted their energies to the study of one portion of the field, and even Larcombe, whose main thesis seems to have been the study of the Golden Mile, has chosen an area in which owing to the magnitude and depth of the lode formations, and the consequent chemical and thermodynamic alterations, definite clues as to the original rock types could hardly be expeoted to remain, since there can be no doubt that in petrology, as in stratigraphy, much light can occasionally be thrown on the most difficult portions of a field by the study of the outlying portion. It has therefore been with considerable interest that the investigation of the North End has been begun.
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References
page 107 note 2 [Plates VI and VII will appear in the concluding part of this paper.—Ed.]
page 107 note 3 Geology of Kalgoorlie.
page 108 note 1 Geol. Soc. W. Australia, Bulletin 42.
page 108 note 2 Loc. cit.
page 108 note 3 Plate v, Geological plan and section of the Tea Gardens.
page 108 note 4 Of those of this number that were obtained by previous collectors, two, viz. Nos. 2918 and 11096, find no counterparts among Mr. Feldtmann's collection. No. 2198 was obtained from the extreme north-west of the area under consideration, and from a dump so weathered as to yield no specimens of any service. The locality from which 11096 was brought has been noted in such vague terms as to render it impossible now to trace the specimen in the field.
page 108 note 5 With the exception of Nos. 12322 and 12324.
page 109 note 1 Economic Geology: Mineralization in Copper Veins at Butte, Montana, vol. vii, No. 1.
page 109 note 2 i.e. 12381, S. 610, S. 188.
page 109 note 3 Op. cit., vol. vii, No. 1, p. 57.
page 110 note 1 Rocks of Cape Colville Peninsula, vol. i, pp. 135–7.
page 111 note 1 Clarke, Data of Geo-chemistry, p. 347.
page 111 note 2 Van Hise, Treatise on Metamorphism, p. 326.
page 114 note 1 M.C. = macroscopic characters; S. = section.