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On a new barium plagioclase felspar

Published online by Cambridge University Press:  14 March 2018

S. R. Nockolds  and
E. G. Zies
S. R. Nockolds
Affiliation:
Geology Department, Manchester University
E. G. Zies
Affiliation:
Geophysical Laboratory, Carnegie Institution, Washington, U.S.A
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Extract

In the memoir dealing with the geology of the Broken Hill district, New South Wales, mention is made 1 of a remarkable rock type found in a few places in the vicinity of Broken Hill, which looks not unlike an aplite in the field. A brief description of its appearance in thin section is given. It consists mainly of what appears to be very basic plagioclase. A fair amount of quartz, some epidote and bluishgreen hornblende were noticed, whilst a notable amount of sphene is present.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 23 , Issue 143 , December 1933 , pp. 448 - 457
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1933

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References

page 448 note 1 Browne, W. R., Appendix I of Mere. Geol. Survey, N.S.W., 1922, no. 8, p. 337.Google Scholar

page 450 note 1 L. Dupare and M. Reinhard, M~m. Soc. Phys. Hist. Nat. Genéve, 1924, vol. 40, fasc. 1, plate 9, [Min. Abstr., vol. 3, p. 34.]

page 451 note 1 Data for other plagioclases from Dupare and Reinhard, loc. cir., p. 18, fig. 7.

page 451 note 2 K. Nakashima, Journ. Geol., 1926, vol. 34, pp. 235-247.

page 452 note 1 Data taken from Winchell's Elements of optical mineralogy, 1927, pt. II, pp. 279, 292, 293.

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