摘要
100号矿体位于南丹大厂矿田的西带,是一个超大型锡多金属矿体。其主要的成矿温度为300～360℃(文中计算所用的温度为300℃和350℃)。当温度为300℃时,pH值为4.8～6.3,当温度为350℃时,pH值为4.8～7.3。其硫逸度(f_(S_2)),氧逸度(f_(O_2))和二氧化碳逸度(f_(CO_2))呈现出由低到高的趋势。分析了100号矿体的硫、铅、氢和氧同位素,发现硫源为一种混合硫;铅是二阶段异常铅;成矿流体是以岩浆水为主,后期加入了部分天水或其他水混合而成。
Orebody No. 100 is situated in the western Dachang tin-polymetallic orefield, Nandan County. The orebody is a giant tin-polymetallic one. The main ore-forming pressure was 8. 24 MPa. With the temperature from low to high, pH was from 4. 8～6. 3 to 4. 8～7. 3. The sulfur, oxygen and carbon dioxide fugacity was relatively low. The isotopic features show that sulfur came from a mixed source, and lead from two unusual lead source, and the ore-forming fluid was mixed by magmatic water and other waters such as meteoric water.
出处
《地质论评》
CAS
CSCD
北大核心
2002年第S1期245-249,共5页
Geological Review
