摘要
从 Dajing 存款的 Sn-Cu 矿石身体并且从 Huanggangliang 存款的 Sn 矿石身体在荧石和石英套住的单个液体包括上的 LA-ICP-MS 分析被进行用液体的 Rb/Sr 和 Sn/Cu 比率在 Dajing 存款跟踪 Cu 富有、 Sn 富有的液体的来源和进化。在 theDajing 的Cu富有的液体扔的结果表演，相对，在 Na 并且可能的富人源于深层的基本岩浆，包含 Cuseveral 到几多于 Sn ，和 Sr 的十时间几到几多于 Rb 的十时间，当时Sn富有的液体，相对，在 K 并且可能的富人源于高级花岗石的岩浆，包含 Sn 几到几多于 Cu ，和 Rb 的十时间几到几多于 Sr 的十时间。这被建议 Sn 富有并且 Cu 富有的液体在阶段被混合对低温度和低咸度中等，在 Dajing 存款的中央部分导致 Cu-Sn 矿石身体的形成。
LA-ICP-MS analyses on single fluid inclusions trapped in fluorite and quartz from the Sn-Cu orebody of the Dajing deposit and from the Sn orebody of the Huanggangliang deposit were conducted to trace the source and evolution of Cu-rich and Sn-rich fluids in the Dajing deposit using the Rb/Sr and Sn/Cu ratios of the fluids. The results show that the Cu-rich fluids in the Dajing deposit, relatively rich in Na and probably derived from deep-seated basic magma, contain Cu several to several tens of times more than Sn, and Sr several to several tens of times more than Rb, while the Sn-rich fluids, relatively rich in K and probably derived from high level granitic magma, contain Sn several to several tens of times more than Cu, and Rb several to several tens of times more than Sr. It is suggested that the Sn-rich and the Cu-rich fluids were mixed at the stage of moderate to low temperature and low salinity, resulting in the formation of Cu-Sn orebodies at the central part of the Dajing deposit.
基金
The LA-ICP-MS analyses were carfled out at the laboratory of Prof.GUnther at Institute of Science and Technology,Switzerland.Dr.Yuan Honglin is thanked for assistance during the analyses.Profs.Ni Pei and Fan Hongrui are thanked for constructive comments.The work was supported by National Natural Science Foundation of China(Grant No.40273021)
National 973 Project(Grant No.2001CB409806).
