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Zinccopperite—A New Variety of Zinc‐Copper Intermetallic Compounds Discovered in a Porphyry‐Copper Deposit
Author(s) -
Yuanfu XIAO,
Yan SUN,
Yan LU,
Chunqi WEN,
Jiangzhen WANG
Publication year - 1998
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1998.tb00408.x
Subject(s) - copper , biotite , chalcopyrite , porphyry copper deposit , mineral , quartz monzonite , albite , kyanite , pyrite , geology , zinc , quartz , geochemistry , metallurgy , mineralogy , materials science , fluid inclusions , paleontology , pluton , tectonics
Zinccopperite (tentatively named) is a rare native alloy mineral discovered in quartz monzonite—porphyry in the Xifanping area, Yanyuan County, Sichuan Province. It is a new variety of zinc—copper alloy mineral found for the first time in the porphyry‐copper deposit in China. Its intergrown minerals are K—feldspar (mainly perthite), albite—oligoclase, quartz and biotite; and the associated minerals include pyrite and chalcopyrite. It is characterized by a golden reflection colour, being isotropic (isometric), with the grain size ranging from 10 to 50 μm, microhardness VHN 10 = 190 kg/mm 2 , and reflectance R VM = 67.97%. Electron microprobe (Model JXA—733) analysis shows Cu = 59.15%–62.55% and Zn = 36.32%–39.85%. The crystallochemical formula is Cu 6.27‐7.0 Zn 4.0 , simplified as Cu 7 Zn 4 .