摘要
大平掌铜多金属矿床由块状硫化物矿体 (上部 )和细脉浸染状矿体 (下部 )组成 .前者的包裹体类型简单 ,均一温度、盐度和捕获压力较低 .后者以包裹体类型复杂、均一温度及捕获压力较高为特征 .其差异与成矿流体演化有关 .研究表明 ,成矿流体以富 K+、Na+、Cl-、SO2 - 4 、F-、CO2 和 CO为主 ,属中低温、中盐度的 K质溶液 ,主要来源于海水 。
Dapingzhang Cu polymetal deposit was composed of massive sulfide ore beds and veinlet disseminated sulfide orebodies. Compared with the former, the inclusion in the latter was characterized by its complex assemblage in types, and higher homogenization temperature, salinity and trapped pressure. Such variations in different orebodies were related to the evolution of ore forming solutions. Based on the studies of composition, H- and O-isotopes of fluid inclutions, it can be deduced that ore forming fluid was characterized as being rich in K +, Na +, Cl -, SO 2- 4, F -, CO 2 and CO, and belongs to the K type solution, epi to mesothermal in nature, moderately salinity and high pressure, mainly derived from sea water mixed with magmatic water.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第4期581-586,共6页
Acta Petrologica Sinica
基金
云南省自然科学基金项目 (97D0 3 1M)资助成果
关键词
流体包裹体
成矿流体
多金属矿床
铜矿床
Fluid inclusion, Ore forming fluid, Dapingzhang Cu polymetal deposit
