Hedleyite, a rare bismuth telluride in the Kumbel' skarn-ore field, northern Kirgizia

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Authors:Ishmurzin, F. Ya.; Nikolayeva, E. P.; Pergat, G. P.
Volume Title:Doklady. Earth Science Sections
Source:Doklady. Earth Science Sections, 221(1-6), p.147-148. Publisher: Scripta Publishing, Silver Spring, MD, United States. ISSN: 0012-494X
Publication Date:1976
Note:In English. 4 refs.; table
Summary:Hedleyite was found in polished ore sections from the auriferous quartz-carbonate Zolotaya vein section of the Kumbel' skarn ore field of northern Kirgizia. The hanging wall of the vein contains calcite and ankerite and the footwall quartz. Other subordinate minerals are pyrite, chalcopyrite, gold, native bismuth, bismuthinite, galena, scheelite, tellurides, and their derivative supergene minerals. Hedleyite is intergrown with bismuthinite, forms inclusions in and replacement rims around gold, as well as forming irregular stringers in gangue materials. Cleavage is perfect in one direction, anisotropism is weak, reflectance is high, and the mineral has a tin white colour with barely perceptible cream hues in reflected light. Conspicuous hardness anisotropism of type II is exhibited, and hardnesss anisotropism of type I is present. XRD patterns of the mineral belong to the tellurbismuth group and its strong lines resemble the pattern of hedleyite. Electron microprobe data gives the formula (Bi7Te3) of hedleyite which is considered to be an independent mineral. [W.J.F.]
Subjects:Alloys; Bismuth; Carboniferous; Hedleyite; Metals; Metamorphic rocks; Metasomatic rocks; Mineralogy; Minerals; Paleozoic; Skarn; Sulfides; Tellurides; Trace elements; X-ray data; Asia; Commonwealth of Independent States; Kyrgyzstan; USSR; Bismuth telluride; Kumbel ore field
Coordinates:N413000 N430000 E0800000 E0700000
Abstract Numbers:82M/0674
Record ID:1978013067
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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