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Title:
Zemkorite - A new carbonate from Yakutian kimberlites
Authors:
Egorov, K. N.; Ushchapovskaia, Z. F.; Kashaev, A. A.; Bogdanov, G. V.; Sizykh, Iu. I.
Affiliation:
AA(AN SSSR, Institut Zemnoi Kory, Irkutsk, USSR), AB(AN SSSR, Institut Zemnoi Kory, Irkutsk, USSR), AC(AN SSSR, Institut Zemnoi Kory, Irkutsk, USSR), AD(AN SSSR, Institut Zemnoi Kory, Irkutsk, USSR), AE(AN SSSR, Institut Zemnoi Kory, Irkutsk, USSR)
Publication:
Akademiia Nauk SSSR, Doklady (ISSN 0002-3264), vol. 301, no. 1, 1988, p. 188-193. In Russian.
Publication Date:
00/1988
Category:
Geophysics
Origin:
STI
NASA/STI Keywords:
BIOTITE, CARBONATES, GEOCHEMISTRY, MINERALOGY, PERIDOTITE, CHEMICAL ANALYSIS, X RAY DIFFRACTION
Bibliographic Code:
1988DoSSR.301..188E

Abstract

A new carbonate, Na2Ca(CO3)2, named zemkorite, has been discovered in a kimberlite pipe in Yakutia. Zemkorite, which occurs at a depth of 400-450 m, is a colorless, transparent brittle mineral with a Mohs hardness of 2.0; it is soluble in warm water and has an estimated density of 2.47 g/cu cm. Zemkorite is a postmagmatic mineral formed through the conversion of kimberlite by imposed highly mineralized sodium solutions. Detailed results of chemical and X-ray diffraction analyses are presented.
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