CAJ | 학술논문

中天山北缘断裂带北侧的北天山晚古生代蛇绿混杂岩带呈 NWW—SEE 向展布，新疆巴音沟蛇绿混杂岩是该带的重要组成部分和典型代表。在前人研究基础上，对巴音沟蛇绿混杂岩带的物质组成进行详细的野外地质填图和剖面测制，发现至少存在3种玄武质岩石：与变质橄榄岩及辉长岩等伴生的玄武质岩石、与火山碎屑岩及酸性火山岩伴生的玄武质岩石及分布于蛇绿混杂岩边部的玄武质岩石。地球化学特征显示它们分别对应 MORB 型、OIB 型和 CRB 型等3种不同性质的玄武岩，表明巴音沟蛇绿混杂岩带物质组成、形成演化的复杂性。通过对巴音沟蛇绿混杂岩带两侧地质体的对比研究，认为巴音沟洋关闭于早石炭世末。
중천산북연단렬대북측적북천산만고생대사록혼잡암대정 NWW—SEE 향전포，신강파음구사록혼잡암시해대적중요조성부분화전형대표。재전인연구기출상，대파음구사록혼잡암대적물질조성진행상세적야외지질전도화부면측제，발현지소존재3충현무질암석：여변질감람암급휘장암등반생적현무질암석、여화산쇄설암급산성화산암반생적현무질암석급분포우사록혼잡암변부적현무질암석。지구화학특정현시타문분별대응 MORB 형、OIB 형화 CRB 형등3충불동성질적현무암，표명파음구사록혼잡암대물질조성、형성연화적복잡성。통과대파음구사록혼잡암대량측지질체적대비연구，인위파음구양관폐우조석탄세말。
Late Paleozoic ophiolitic melange belt in North Tianshan,which locates in the north rim fault zone of Middle Tianshan,spreads in NWW-SEE direction.Bayingou ophiolitic melange is an important part and the typical representative of the belt.Based on the previous researches, the material composition of Bayingou ophiolitic melange belt was analyzed by the field geological mapping and section measuring.The results show that there are at least three kinds of basaltic rocks,including basaltic rock associated with metaperidotite and gabbro,basaltic rock associated with pyroclastic and acidic volcanic rocks,and basaltic rock in the margin of ophiolitic melange;the basaltic rocks correspond to MORB,OIB and CRB types of basalts,reflecting the complexity of formation and evolution of Bayingou ophiolitic melange belt.The comparison of geological bodies in the both sides of Bayingou ophiolitic melange belt shows that Bayingou ocean closes at the end of Early Carboniferous.