摘要
应用Ｕ－Ｐｂ、Ｒｂ－Ｓｒ同位素体系与方法，结合Ｏ、Ｓ同位素的研究，对广西贺县龙水金矿床的形成时代、异常铅的成因及矿床成因进行了探讨。结果表明，该矿床形成于１２０．５Ｍａ左右，其异常铅为具有古老地壳阶段演化历史的铅与少量幔源铅的混合，成矿物质可能主要来自矿区发育的花岗闪长岩体。
The O,S isotopes,the ore-forming age,the genesis of the anomalous Pb and the source of ore-forming materials of the Longshui gold deposit are discussed in this paper.The results show that the deposit has a CretaceOus mineralization age of 120.5 Ma using Rb-Sr and U-Pb dating methods,the anomalous Pb resulted from the mixing of ancient crustal Pb and a small amount of mantle Pb,and the ore-forming materials were dominantly derived from the granodiorite in the ore district.
出处
《地球化学》
CAS
CSCD
北大核心
1994年第C00期39-47,共9页
Geochimica
