兰坪盆地西缘铜矿床流体包裹体研究及找矿意义

Fluid Inclusion Studies and Its Geological Significance on Copper Deposits in the West Margin of Lanpin Basin, Yunnan

兰坪盆地西缘铜矿床的成矿流体是中低温、中高盐度的氯化物型或硫酸盐——氯化物型热卤水,源于地层水和循环大气降水,并有部分深源流体混合,矿床和矿点在流体包裹体特征上的差异明显,为找矿提供了重要新线索。

Fluid inclusion studies show that ore-forming solutions of copper deposits in the west margin of Lanpin basin artre a chloride or sulphate-chloride type of hydrothermal-brine, with middle to low temperature and middle-high salinity, originated from formation water and circulated meteoric water, and mixing with some deep solution. The deposits are formed in intermediate pressure, reducing and weak alkalic conditons. The differences in character of fluid inclusion between deposits and ore sport are very clear, which can be a new important clue for prospecting