Sulfur isotope geochemistry of the Lemachang independent Ag deposit, northeastern Yunnan——A concurrent discussion on the mechanism of sulfur isotope equilibrium between barite and freibergite below 300℃  

作　　者：DENG Hailin~1, LI Chaoyang~1, ZHOU Yunman~2 and WANG Congwu~2 1. Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. No.3 Braneh of No.1 Geology Party, Yunnan Bureau of Geology and Mineral Resources, Xundian 655205, China 

出　　处：《Chinese Science Bulletin》1999年第S2期227-230,共4页

摘　　要：IN the study of hydrothermal deposits sulfur isotopes bear much information about the source of sulfur,ore-forming temperature, the evolution of ore-forming fluids and the mechanism of metallogenesis. Todetermine whether sulfur isotopes reach equilibrium between fluids and sulfur-bearing minerals precipitated from the former and among the sulfur-bearing minerals is the key to the application of sulfur isotopegeochemistry to geological problems. As it has been commonly accepted that sulfur isotopic equilibrium could not be reached between sulfate and sulfide below 350℃, little attention has been paid to thepossible mechanism of sulfur isotope equilibrium between sulfate and sulfide below 300℃. However, this note presents an example to show sulfur isotope equilibrium between barite and sulfate

关 键 词：SULFUR ISOTOPE Lemachang INDEPENDENT Ag DEPOSIT BARITE freibergite SULFUR ISOTOPE EQUILIBRIUM below 300℃. 

分 类 号：P53[天文地球—古生物学与地层学]