新疆阿尔泰花岗岩源区混合-结晶分异复合过程的微量元素效应

TRACE ELEMENT EFFECTS OF SOURCE MIXINGCRYSTAL FRACTIONATION COMPOSITE PROCESSES IN GRANITES OF THE ALTAY MTS., XINJIANG UYGUR AUTONOMOUS REGION

根据微量元素e1、e2、e3总分配系数的相对大小,源区混合-结晶分异复合过程在它们的比值-比值相关图上造成三种综合效应。新疆阿尔泰花岗岩微量元素的比值-比值相关图清晰地反映了三种效应,暗示着源区混合-结晶分异复合过程。源区混合机制可能为沉积物质在沉积盆地里的掺合。混合端员可能为:1)成熟度差异悬殊的陆源碎屑物质;2)陆源碎屑与基性火山物质。

Source mixing-crystal fractionation composite processes generate three complex patterns on ratio-ratio correlation diagrams of trace elements e1, e2, e3 according to their relative incompatibility. The three effects are clearly displayed on ratio-ratio correlation diagrams of trace elements in granites of the Altay Mts., Xinjiang Uygur Autonomous Region, China, indicative of source mixing-crystal fractionation composite processes. Source mixing mechanism is possibly the mingling of sediments in sedimentary basins. Mixing endmembers are probably: 1) terrestrial fragments differing greatly in their sedimentary maturity; 2) terrestrial fragments and basic volcanic rocks.