Geological and Geochemical Characteristics of the Tianmashan Au-S Deposit in Tongling, Anhui Province
安徽铜陵天马山金硫矿床地质地球化学特征

The Tianmashan Au-S deixosit is geochemically characterized by a vertical variation and a "two-member texture" as well as the development of the upper stratiform ore bodies and the lower disseminated-veinlet mineralized rocks(ores).Pb,Zn,Au,Ag,As,Hg content and average δ18O values increase progressively whereas Cu,Mo,Cr,Co,Ni,REE content,measured temperatures(from 499℃ to 65℃)of fluid inclusions and δ34S decrease gradually from the lower disseminated-veinlet mineralized rocks(ores)to the upper stratiform ore bodies.δ34S values of pyrite range from+4.0‰to+9.6‰.The average δ18O value of calcite and quaaz in the upper stratiform ore body is+13.7‰.while that of quartz and whole rock in the lower disseminated-veinlet mineralized rocks(ores)is+12.3‰.These geological-geochemical characteristics suggest that the Tianmashan Au-S deposit is of the submarine sedimentary exhalative origin.