湘西南金矿床地球化学特征及其成因

对湘西南金矿床的研究表明，五强溪组为金的主要矿源层，其形成的大地构造 活动大陆边缘；金矿床中Ｐｂ、Ｓ、Ｓｒ的同位素特征反映它们均来自赋矿围岩；成矿流体的和Ｈ、Ｏ同位素特征指示其主要来自大气降水；成矿流体显法出低温，低盐度、呈中性－弱碱性的特征；成矿时代为加里东期，而 传统认识中的武陵，雪峰期；矿床成因为大气降水热液改造成因。

Geochemical characteristics and ore genesis of gold deposits in southwestern Hunan Province

The geochemical study indicates that Wuqiangxi Formation, formed at the active continental margin, is the gold sourcebed in southwestern Hunan. It is revealed that Pb, S, Sr isotopes of gold deposits in this area originate from the host rocks. The composition of ore forming fluid and its H, O isotope features reveal its origin of meteoric water, and the ore forming fluid is characterized by the low temperature, low salinity, medium density, low oxygen fugacity, medium weakly alkaline. Gold mineralization in this area took place in Caledonian period rather than in Wuling Xuefeng periods or Yanshanian period as expected, and its ore genesis can be placed into the meteoric hydrothermal reworking deposit.