Origin of salts and alkali carbonates in the Udachnaya East kimberlite: Insights from petrography of kimberlite phases and their carbonate and evaporite xenoliths

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• 作者：M.G. Kopylova^a ; ^{mkopylov@eos.ubc.ca} ; M. Gaudet^a ; ^{mgaudet@eos.ubc.ca} ; S.I. Kostrovitsky^b ; ^{serkost@igc.irk.ru} ; A.G. Polozov^c ; ^d ; ^{a.g.polozov@mail.ru} ; D.A. Yakovlev^b ; ^{yakovlev@igc.irk.ru}
• 关键词：Udachnaya East ; Pyroclastic and coherent kimberlites ; Limestone and evaporite xenoliths ; Serpentinization ; Primary kimberlite melt ; Emplacement temperature
• 刊名：Journal of Volcanology and Geothermal Research
• 出版年：2016
• 出版时间：15 November 2016
• 年：2016
• 卷：327
• 期：Complete
• 页码：116-134
• 全文大小：7174 K
• 卷排序：327

文摘

Two varieties of pyroclastic kimberlite and coherent kimberlite comprise the Udachnaya East pipe. The pyroclastic kimberlites belong to the Fort-a-la-Corne type. We find and describe epigenetic halite and evaporite xenoliths parent to the exotic salt minerals at Udachnaya. Crustal xenoliths partially control the mineralogy of the host kimberlite. The model of the “dry” Na and Cl-rich primary kimberlite melt is invalidated.