喀拉通克铜镍矿成岩成矿模式

Diagenetic and metallogenic model of Kalatongke Cu-Ni deposit

新疆喀拉通克铜镍多金属成矿带是中亚造山带中部一个重要的Cu-Ni-Au多金属成矿带。通过讨论喀拉通克铜镍多金属矿床的成矿物质来源和成矿机制来研究该矿床的成岩成矿模式。结果表明:喀拉通克铜镍多金属矿床中的硫具有明显的陨石硫特征,说明硫来自地幔,但并不排除地壳硫的加入。岩体的铷锶同位素也已表明有地壳物质的混入。地层和矿石中的铅来源一致,均来源于地幔的玄武岩浆。新疆喀拉通克铜镍多金属矿床的成矿模式是以岩浆深部熔离作用为主导的脉动式成矿。

Kalatongke Cu-Ni poly-metal metallogenic belt is one of the most important Cu-Ni-Au belt in Central Asian Orogenic belt. The ore-forming material source and metallogenic mechanism were studied to discuss the diagenetic and metallogenic model of Kalatongke Cu-Ni deposit. The results suggest that the sulphur has the characteristics of meteorolite sulphur which implies that the sulfur is derived from mantle, but is possibly open to the sulphur from crust. Rb-Sr of rock mass also agrees with the precipitation of crust substance. The lead sources of both stratigraphy and ore are similar, and come from basaltic magma of mantle. The ore-forming models is pulsing mineralization dominated by liquation of deep magma.