山东龙泉站金矿区稳定同位素特征及其地质意义

Characteristics and Geological Significance of Steady Isotopes in Golden Ore in the Longquanzhan Area of Yishu Fault Zone,Shandong Province

山东龙泉站金矿区的金矿产于沂水-汤头断裂主裂面下盘的糜棱岩化碎裂岩和花岗质碎裂岩中。对区内典型金矿床硫、氢、氧、碳和铅等稳定同位素的研究资料表明:黄铁矿的δ34S值的变化为+2.7‰-+4.4‰,δ18OH2O值为-1.78‰-+4.07‰,δD(SMOW)值为-74‰--77‰,δ13C平均值为-4.18‰--5.1‰,铅同位素具有正常铅的特点,说明区内金矿的成矿物质来源于地下深处,成矿流体以岩浆水为主,大气降水为辅。

The golden ore lies between mylonitic cataclasite rocks and granitic fragmentized rocks in the lower part of main tault plane of Yishui-Tangtou fault within the area of Longquanzhan Yishu fault zone Shandong Province. By study the data of isotopes in the typical gold mine, such as sulfur, hydrogen,oxygen, carbon and lead, it is shown that ;the changing value of δ^34S in iron pyrites is ＋2. 7‰ ＋4.4‰; the value of δ^18OH2O changes within --1.78‰-4.07‰;the value of δD（SMOW） varies in -71‰-77‰ and the average value of δ^13C is within --4. 18‰- 5.1‰, the isotope of lead has the same features in common. All these prove that the original matter for golden ore lies in the deep subterranean and the magma water is more than atmospheric precipitation in the liquid.