2003•Geology and ProspectingRequires access

SILVER OCCURRENCE AND DISTRIBUTION REGULATION IN THE NANFENG'AO AG DEPOSIT IN CHENZHOU, HUNAN PROVINCE

Yaxin Liu

Abstract

The Nanfeng'ao Ag deposit is a hydrothermal fissure filling-metasomatism type deposit controlled by NNE-NE trend faults. Wallrocks are Sinian low-grade metamorphic sandstone. Silver exists mainly in silver minerals. 15 silver minerals have been found, 10 of them are common. Main silver-minerals are silver fablerz, silver jamesonite. In addition, silver exists in Ag-bearing minerals in the form of isomorphous replacement. Main Ag-bearing mineral is galena, and others include marmatite, chalcopyrite, pyrite and arsenopyrite. Ag mineralization is concentrated in central ore area at 03 to 17 sections and 980 to 1036m level. Ag is rich in lead-rich orebodies, showing a positive relationship with lead.

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Key concepts: Galena, Chalcopyrite, Arsenopyrite, Mineralization (soil science), Geology, Geochemistry, Pyrite, Hydrothermal circulation