CAJ | 학술논문

　　科岗蛇绿岩位于塔里木板块西南缘西昆仑中间地块与北侧西昆仑沟弧带分界线上。通过对科岗蛇绿岩带岩石组成、地质地球化学特征研究，肯定了新疆地质志对科岗蛇绿岩带“三位一体”蛇绿岩建造的认识，分别由下部变质橄榄岩相，中部堆晶岩相、浅色花岗岩相，上部块状辉长岩-辉绿岩相和火山岩及碎屑岩相组成。科岗蛇绿岩为造山带型，与洋中脊型蛇绿岩区别明显。其大地构造环境应为弧后盆地或破坏性大陆边缘小洋盆快速拉张环境产物。
　　과강사록암위우탑리목판괴서남연서곤륜중간지괴여북측서곤륜구호대분계선상。통과대과강사록암대암석조성、지질지구화학특정연구，긍정료신강지질지대과강사록암대“삼위일체”사록암건조적인식，분별유하부변질감람암상，중부퇴정암상、천색화강암상，상부괴상휘장암-휘록암상화화산암급쇄설암상조성。과강사록암위조산대형，여양중척형사록암구별명현。기대지구조배경응위호후분지혹파배성대륙변연소양분쾌속랍장배경산물。
KeGang ophiolite is located in Tarim Plate in the southwestern margin of the western Kunlun intermediate massif and the north side of West Kunlun trench-arc with the dividing line. In this paper,the study on rock composition of KeGang ophiolite belt and geochemical characteristics affirmed the understanding of"Trinity"ophiolite-built in KeGang ophiolite belt,from the lower part of the metamorphic peridotite phase,the central cumulate facies,light-colored granite phase, the upper part of massive gabbro-diabase phase and volcanic rocks and clastic rocks,respectively.KeGang ophiol-ite is orogenic type,obviously different from the Mid-ocean ridge ophiolite. The tectonic environment should be quickly extensional environment product of back-arc basin or small ocean basin of destructive continental margin.