Pyrrhotite textures and their genetic implications in the Hongtoushan massive sulphide deposit, Liaoning Province, China

The Archaean massive sulphide Cu-Zn deposit at Hongtoushan has been metamorphosed to upper amphibolite facies. An investigation on ore textures shows that pyrrhotite in the deposit was originally produced by submarine exhalation, and subsequently metamorphosed, annealed and recrystallised. Deformati...

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Bibliographic Details
Published inActa geochimica Vol. 20; no. 3; pp. 210 - 218
Main Authors Gu, Lianxing, Xiao, Xinjian, Ni, Pei, Wu, Changzhi, Mao, hongli
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.09.2001
Department of Earth Sciences, State Key Laboratory of Metallogeny of Endogenic Metal Deposits,Nanjing University, Nanjing 210093, China
Subjects
Deformation
Genetics
Geochemistry
Metamorphic rocks
Metamorphism
Sulfides
Hongtoushan
metamorphism
pyrite
pyrrhotite
sulphide
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Summary:The Archaean massive sulphide Cu-Zn deposit at Hongtoushan has been metamorphosed to upper amphibolite facies. An investigation on ore textures shows that pyrrhotite in the deposit was originally produced by submarine exhalation, and subsequently metamorphosed, annealed and recrystallised. Deformation textures formed by progressive metamorphism of pyrrhotite were erased almost completely under peak conditions, and the presently-existing deformation textures and ore mylonites are largely resultant from diaphthoresis. Deformation and annealing of pyrrhotite could have been enhanced by fluids. Retrogressive fluids are characterized by high oxygen fugacity. [PUBLICATION ABSTRACT]
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ISSN:1000-9426
2096-0956
1993-0364
2365-7499
DOI:10.1007/BF03166141