摘要
本文报道了海南岛二甲、不磨等金矿床的铅、硫、氧及氢等同位素地球化学研究的最新成果，着重论述了铅和硫等同位素特征及铅、氧（氢）同位素示踪技术在金矿找矿评价中的应用，并建立同位素地球化学找矿模式。研究结果表明，在所研究的矿区，蚀变岩石的δ１８Ｏ‰值在矿体部位明显增高，而δＤ‰值及放射成因铅（如２０６Ｐｂ‰Ｐｂ值）则明显降低，而且与矿石品位和矿体大小关系十分密切。因此，铅、氧（及氢）等同位素可用于找矿评价的示踪研究。
Based on studies of Pb.S.O and H isotope geochemistry of the Erjia.Bumo ete. gold deposits,Hainan, this paper deals with the use of Ph.O ete. isotopes to the prospect evaluation in the Hainan gold mines. In the studies of the variation systematically in Ph.O (H) isotope data in the drill holes, it was found that the isotopes exhibit an obvious reqularity related to the scale and tenor of the ores. The 818O value relatively increases, at the same time, the 206Pb/204Pb and the δD values relativety decrease at the ore bodes or rich ores. Therefore, this isotopes can be used as an important indicator or tracer for prospect evaluation of the gold deposits.
关键词
同位素
地球化学
海南
金矿床
isotope geochemical
gold deposits
Hainan
