【摘要】 对研究较为薄弱的中昆仑地区不同期次花岗岩的区域分布规律、岩石化学特征及其构造环境意义进行了初步研究。研究表明加里东晚期（４３０ ～３７０ Ｍａ） 花岗岩主要分布于祁漫塔格山北坡，具科迪勒拉Ｉ 型花岗岩或ＡＣＧ、ＰＡＧ 特征，代表活动大陆边缘或弧后盆地构造属性，加里东晚期祁漫塔格北坡至少存在洋壳的有限俯冲；华力西中期（３２０ Ｍａ ±） 发育伸展型富钾低铝钙碱性花岗岩，类似加里东Ｉ 型、ＣＰＧ、ＫＣＧ 花岗岩特征，广布于祁漫塔格山和求勉雷克山区，形成于碰撞后构造环境；华力西晚期（２７０ ～２５０ Ｍａ） 具科迪勒拉Ｉ型或ＡＣＧ 特征，属活动大陆边缘构造环境，其形成与早二叠世特提斯洋的向北俯冲作用有关；印支—燕山期（２２０ ～１６０ Ｍａ） 具Ａ２ 型或富钾低钙钙碱性花岗岩，形成于碰撞后挤压向拉张转折过渡的构造环境。更多还原

【Abstract】 The distribution,lithochemistry and tectonic significance of the granitoids in the Central Kunlun are preliminary discussed.The Caledonian granitoids,majorly distributed in the northern Qimatage mountain,showing geochemical characteristics of Cordilleran I-type grantiods,low-K high-Ca amphibole-bearing calc-alkaline granitoids(ACG) or peralkaline and alkaline granitoids(PAG),and associated with an active continental margin or back-arc basin,indicated the existence of the Qimatage ocean-related limited subduction during the Caledonian period.The mid-Variscan granitoids,emplaced in the Qimatage and Qiumilaike Mountains,are similar to Caledonian I-type,Cordierite-bearing peraluminous granitoids(CPG) or K-rich calc-alkaline granitoids(KCG),associated with a post-collision geodynamic environment.The late Variscan granitoids exhibit characteristics of Cordilleran I-type granitoids or ACG,associated with an active continental margin related to the northward subduction of Tethys ocean in the early Permian.The Indosinian-Yanshanian granitoids display characteristics of A2-type or high-K low-Ca calc-alkaline granitoids,related to a post-collision geodynamic environment with transition from a compressional regime to a tensional regime.更多还原