Coalingite from kimberlite breccia of the Manchary pipe,Central Yakutia |
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| Authors: | N V Zayakina O B Oleinikov T I Vasileva N A Oparin |
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| Institution: | 1. Institute of Geology of Diamond and Precious Metals, Siberian Branch, Russian Academy of Sciences, pr. Lenina 39, Yakutsk, 677980, Russia
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| Abstract: | Coalingite, Mg10Fe2(CO3)(OH)24 · 2H2O, rare Mg–Fe hydrous carbonate, has been found in the course of the mineralogical study of a disintegrated kimberlite breccia from the Manchary pipe of the Khompu–May field located in the Tamma Basin, Central Yakutia, 100 km south of Yakutsk. Coalingite occurs as small reddish brown platelets, up to 0.2 mm in size. It is associated with lizardite, chrysotile and brucite, which are typical kimberlitic assemblage. Coalingite is a supergene mineral, but in this case, it is produced by the interaction of brucite-bearing kimberlite and underground water circulating through a vertical or oblique fault zone. |
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