安徽月山矿田铜、金矿床氢氧同位素地球化学及成矿流体输运-化学反应成矿动力学

本文基于氢氧同位素的地球化学研究,论述了安徽月山矿田两类铜、金矿床成矿流体的来源、演化及成矿流体输运扣化学反应扣成矿作用动力学过程。结论认为。月山矿田金属矿床成矿流体为具复杂演化历史的岩浆水或多成因水的混合,主要成矿阶段成矿热液均以岩浆水占绝对优势,两类矿床是同源岩浆热液系统在不同的地质、地球化学环境下演化的产物,是成矿流体的等温输运反应及温度梯度输运反应等综合作用的结果。

H,O ISOTOPE GEOCHEMISTRY AND TRANSPORT-REACTION DYNAMIC PROCESSES OF ORE-FORMING FLUID FOR Cu, Au DEPOSITS IN THE YUESHAN OREFIELD, ANHUI PROVINCE

H,O isotope geochemistry and transport reaction dynamic processes of ore forming fluid for Cu,Au deposits in the Yueshan orefield,Anhui province have been investigated and discussed.It is concluded that the ore forming fluid of the two types of Cu,Au deposits ,the skarn type and the vein hydrothermal ones was magmatic water with a complex evolutional history with some input of meteoric water.The ore forming solutions of the major mineralization stages of ore deposits were magmatic water predominant,and the two types of deposits are the products of comagmatic hydrothermal system that evolved in different geological and geochemical environments.They were formed from a series of complex transport reaction dynamic processes such as the equitemperature transport reaction processes and the temperature gradient transport reaction processes of the ore forming fluid.