CHEN Cui-hua1, ZHAO De-kun2, GU Xue-xiang3, DAI Hong-zhang3
1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;
2. Sichuan Institute of Metallurgical Geology & Exploration, Chengdu 610051, China;
3. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
Abstract：The Laizhaiwan gold deposit is located in the northern rim of the Xichou arch of the Wenshan-Funing fault-fold bundle at the combining site of the western Yangtz platform and the Cathaysia block. The sources of ore-forming metal material were discussed on the basis of the analyses of ore-forming geological conditions in this deposit, trace elements, REE and S, Pb isotopic compositions of this deposit. The comparison plots of trace element features of rocks and ores were almost same, indicating that Au in ores mainly came from rocks. The content of total REE of ores was low with an Eu positive anomaly. The formation of ores may be related with magmatic hydrothermalism. The δ34S composition showed a no tower-shaped distribution and varied in a narrow range of 3.001‰~7.800‰, indicating mixed sulfur. The Pb isotopic composition of ore was stable, indicating normal lead. Analyses of the scheme of Pb isotopic indicated that Pb in ore mainly came from the upper crust.
Key Words： Yunnan Province Laozhaiwan gold deposit; trace element; REE S isotope; Pb isotope
Bulletin of Mineralogy, Petrology and Geochemistry Vol. 33, No.1, 2014, page 23-30
