Characteristics and evolution of fluids associated with lode gold deposits of the Zhaoyuan district, Eastern Shandong, China
The characteristics of the mineralizing fluids and their evolution in the Zhaoyuan district are studied based on microthermometric analysis of fluid inclusions from the Huangbuling, Jinchiling, Yuantuan and Aizizhaojia gold deposits, hosted in the Mesozoic Linglong gneissoid biotite granite suite. Three types of fluid inclusions (aqueous-carbonic, aqueous, and aqueous with daughter minerals) were recognized as secondary inclusions in quartz and were divided into 5 stages (A to E). The homogenization temperatures decrease from 307-341 ℃ (stageA), through 240-280 ℃ (stage B), 146-194℃ (stage C), to 112-159 ℃ (stage D), and salinities are 6.5-8.4, 5.0-10.6, 5.95-9.1, and 3.6-5.6 wt.％ NaCl equivalent for stages A, B, C and D, respectively. The final stage E is represented by halite-saturated aqueous fluids with salinities of 30.8-34.8 wt.％ NaC1 equivalent.The fluid inclusion data and P-T-X analysis suggest that the mineralization fluids in the Zhaoyuan district were of aqueous-carbonic type and that gold precipitation was related to phase separation.
J.Lai G.Chi H.Zou B.Yang T.Dai S.Peng
School of Geoscience and Environmental Engineering, Central South University, Changsha, Hunan, China Department of Geology, University of Regina, Regina, Saskatchewan, Canada School of Geoscience and Environmental Engineering, Central South University, Changsha, Hunan, China
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
139-142
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）