摘要
龙山金锑矿床属典型的强烈改造矿床,可划分为两期矿化:第一期为Cu-Pb-Au,第二期为Sb-Au。第一期矿化成矿物质来自深部更老地层,第二期矿化成矿物质来自控矿地层。矿床成矿温度在140—270℃之间,成矿溶液主要为大气降水,金主要呈Au(HS)_2^-、AuS_2^-配合物及金锑配合物形式迁移。
The Longshan Au-Sb deposit occurs in the well-known gold belt of western Hunan. The Au-Sb deposit consists of a series of hydrothermal veins emplaced in faults in the Sininia Jiangkou Group slates. Two periods of ore deposition are distinguished as follows: I. Cu-Pb-Au and II. Sb-Au.This paper focuses on the geochemical features of the Longshan Au-Sb deposit, including mineralization temperature, the salinity, composition and oxygen and hydrogen isotopic characteristics' of ore fluids and lead isotopes, trace elements and rare earth elements. It is considered that the Jiangkou Group slates are the source rocks for Sb-Ar mineralization, while the ore-forming material for Cu-Pb-Au mineralization is derived from the underlying strata. It is also considered that the ore fluids came from meteoric waters, and gold was transported mainly in the form of coordinate ions such as Au(HS)2- and Au(S2)- and aurum-atinomy coordinate ions. The Au-Sb deposit is a typical reworked deposit.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第4期342-350,共9页
Geochimica
