NDLI: Au-Sb association and fractionation in micro-disseminated gold deposits, southwestern Guizhou

Content Provider	Springer Nature Link
Author	Zhu, Laimin Hu, Ruizhong
Copyright Year	2000
Abstract	The dual geochemical character of paragenesis and fractionation between gold, arsenic and antimony in micro-disseminated gold deposits in southwestern Guizhou is discussed in terms of spatial distribution of independent deposits, lateral and vertical enrichment, mineralization stage and factor and correlation analyses. Thermodynamic calculations of solubility and speciation of gold and antimony minerals indicate that gold is transported in hydrothermal solution as Au(HS)$^{-}$ $_{2}$ and antimony is mainly as Sb (OH) 3 0 although HSb$_{2}$S$_{4}$ may be of increasing importance in acid environment at low temperatures during the late stage of mineralization. Changes in physicochemical conditions hold the key to the association and fractionation between gold and antimony. Gold and antimony response differently to physicochemical variations because they are distinct from each other in soluble speciation and mineral solubility, leading to precipitation at different times and localities during hydrothermal evolution.
Starting Page	208
Ending Page	216
Page Count	9
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	43
Issue Number	2
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	2000-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	micro-disseminated gold deposits association and fractionation of ore metals thermodynamics southwestern Guizhou Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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