海南戈枕金矿带同位素地质特征及其意义

Isotopic geological feature of the Ge-Zhen gold ore zone, Hainan Province and its significance

琼西戈枕金矿带可划分为肠状脉型、糜棱岩型、破碎带蚀变岩型和石英脉型共四种金矿化类型,分别形成于加里东期一海西早期、印支期、印支晚期一燕山早期和燕山晚期.四种金矿化类型的硫同位素组成惊人地一致,但Pb、H、O同位素则有着明显的演变规律,并与戈枕断裂带的构造演化历史密切相关.

Ge-Zhen gold ore zone in western Hainan can be divided into four types of Au mineralization: intestinal-shape type, mylonity type, Jiaojia type, and quartz-vein type, which were formed during Caledonian to early Variscan period, Indosinian period, late Indosinian to early Yanshanian period and late Yanshanian period. The sulfur isotopic compositions of the four types of Au mineralization reach unanimity, but their lead, hydrogen and oxygen isotopes show very strong evolution regularities. These evolution regularities have very close relationships with the tectonic evolution of the Ge-Zhen fault zone.