鄂西北许家坡金银矿床石英流体包裹体研究

STUDY ON FLUID INCLUSION WITHIN QUARTZ FROM THE XUJIAPO GOLD-SILVER DEPOSIT, NORTHWEST HUBEI

在前人工作的基础上,主要根据沿片理形成的矿石与脉状矿石中石英流体包裹体的明显差异和后者流体包裹体Rb-Sr等时线年龄为（86±1.4）Ma,提出该矿床经历了两次成矿作用,燕山晚期脉状矿体叠加在前人提出的印支期沿片岩片理形成的矿体之上,为多期复成中-低温热液矿床。

According to the obvious difference in type,stable isotopic composition and metallogenetic e-poch of fluid inclusions within quartz from the oretxxiies distributing along the schistosity of hoststrata and from the ore-bearing quartz veins, it is concluded that the Xujiapo gold-silver deposit is a composite middle-low hydrothermal one and endured two stages of mineralization, Indosinian orebodies distributing along the schistosity of host strata and Yanshanian ore-bearing quartz veins with a fluid inclusion Rb-Sr isochron age of (86±1.4)Ma.