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Djerfisherite in the Udachnaya-East pipe kimberlites (Sakha-Yakutia, Russia): Paragenesis, composition and origin

Citation

Sharygin, VV and Golovin, AV and Pohkilenko, NP and Kamenetsky, VS, Djerfisherite in the Udachnaya-East pipe kimberlites (Sakha-Yakutia, Russia): Paragenesis, composition and origin, European Journal of Mineralogy, 19, (1) pp. 51-63. ISSN 0935-1221 (2007) [Refereed Article]

DOI: doi:10.1127/0935-1221/2007/0019-0051

Abstract

Djerfisherite, an unusual potassium- and chlorine-bearing sulphide K 6Na(Fe,Ni,Cu) 24S 26Cl, is found in remarkably fresh rocks of the Udachnaya-East kimberlite pipe, including several varieties of kimberlite and a kimberlite-hosted phlogopite-spinel lherzolite xenolith. In both kimberlite breccia and monticellite kimberlite djerfisherite is a common groundmass mineral. Djerfisherite is also present as a daughter phase in olivine-hosted inclusions of trapped carbonate-chloride melt and sulphide melt. The mineral is present as irregular or rounded grains (up to 80-100 μm) in association with magnetite and pyrrhotite in the kimberlite groundmass, and together with carbonates, Na-K-chlorides, silicates, magnetite, sulphates and Fe-Ni-sulphides in melt inclusions. Djerfisherite in the lherzolite xenolith is mainly interstitial (up to 100 μm) and commonly rims primary mantle sulphides that show clear signs of replacement. Broad compositional variations in Fe, Ni and Cu are common in djerfisherite from different occurrences of the Udachnaya-East pipe. Textural relations, heating stage experiments with melt inclusions and compositional data, suggest a late magmatic origin of djerfisherite in the Udachnaya-East kimberlite groundmass, at shallow depths and at T≤s800°C. In contrast, djerfisherite in the lherzolite xenolith appears to be a product of direct precipitation from evolved kimberlite magma infiltrating into lithospheric xenoliths or reactions of evolved kimberlite fluids/melts with primary minerals in xenoliths. © 2007 E. Schweizerbart'sche Verlagsbuchhandlung, D-70176 Stuttgart.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
ID Code:51626
Year Published:2007
Web of Science® Times Cited:27
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2007-08-01
Last Modified:2009-05-07
Downloads:0

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