云南澜沧铅锌银铜矿床稳定同位素地球化学研究

澜沧铅锌银铜多金属硫化物矿床产于石炭系火山岩和碳酸盐岩中。矿床硫同位素研究表明硫具有来自下地壳或上地幔的特征。据铅构造模式认为矿石铅为上地壳铅和地幔铅的混合物，具有多来源的特点。矿物及其包裹体的氢、氧同位素组成反映出成矿溶液早期以岩浆水为主，稍晚有大气降水混入。脉石矿物方解石的碳同位素组成表明成矿过程中热液同围岩进行了广泛的物质成份交换。为与燕山期次火山活动有关的热液矿床。

THE STABLE ISOTOPE GEOCHEMISTRY OF THE LANCANG Pb-Zn-Ag-Cu DEPOSIT IN YUNNAN PROVINCE

The Lancang Ph-- Zn- Ag-Cu polymetallic sulfide deposit is hosted in Carbonifferious voleanic rocks and carbonate. Sulfur aught be derived from lower crust or upper mantle. The lead isotope model indicate that lead has characteristics ofmultiple sources and might be derived from upper crust and upper mantle. The composition of hydrogen alal oxygen isotopes inmineral and fluid inclusion shows that ore--forming hydrotherrnal solution might be mainly derived from the magmatlc water inthe early stage and the meteoric water might be involved in the later stage. The composition of carbon isotope of gangue mineralsshow that the mutual exchange of materials between country rocks and ore--forming fluid had taken place. The deposit is genetically a subvolcanic hydrothermal one.