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GEOREF RECORD

The nature of invisible gold in sulfides from Xiangxi Au-Sb-W ore deposit in northwestern Hunan, People's Republic China

Sixue Yang, N. Blum, E. Rahders and Zhang Zhenru
The nature of invisible gold in sulfides from Xiangxi Au-Sb-W ore deposit in northwestern Hunan, People's Republic China
The Canadian Mineralogist (October 1998) 36, Part 5: 1361-1372

Abstract

TEM measurements, confirmed by EDS, show that some of the sub-mu m gold occurs as 0.07-0.15 mu m spheres on growth of pyrite and in microfissures in stibnite in the red-slate-hosted Proterozoic Xiangxi Au-Sb-W ore deposit. (super 197) Au Moessbauer spectroscopy indicates that 89 % of the Au in pyrite occurs in the metallic state, and that 11 % is chemically bound. Crystal-chemistry considerations and data on As-Sb sulphide systems, particularly pyrite-arsenopyrite-loellingite, indicate that chemically bound Au may occur in octahedra (probably comprised of AuAs (sub 2) , possibly of AuAsS or less likely of AuS (sub 2) ) in As-bearing pyrite and arsenopyrite. The valence, structure and coordination of chemically bound gold in the octahedra are probably intermediate between those in pyrite and in aurostibite.


ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 36, Part 5
Title: The nature of invisible gold in sulfides from Xiangxi Au-Sb-W ore deposit in northwestern Hunan, People's Republic China
Affiliation: Freie Universitaet Berlin, Berlin, Federal Republic of Germany
Pages: 1361-1372
Published: 199810
Text Language: English
Summary Language: French
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
References: 36
Accession Number: 1999-035640
Categories: Economic geology, geology of ore depositsMineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N24°40'00" - N30°10'00", E109°00'00" - E114°15'00"
Secondary Affiliation: Forschungzentrum Juelich, DEU, Federal Republic of GermanyCentral-South University of Technology, CHN, China
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199913
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