摘要
木孜塔格蛇绿岩沿木孜塔格 -鲸鱼湖断裂断续分布 ,由变质橄榄岩、堆晶岩和火山岩 3个单元构成。其中 ,蛇绿岩各单元呈构造混杂出露 ;尖晶石仅见于尖晶石二辉橄榄岩中 ,呈他形半自形。对尖晶石的成分分析表明 ,这些橄榄岩经历了从洋中脊到俯冲带环境的变化 ,而最终在俯冲带就位 ,因此属 SSZ型蛇绿岩 ,这对探讨昆仑山的演化极具参考价值。
Muztag ophiolite outcrops along Muztag-Jingyuhu fault discontinuously and is composed of metamorphosed peridotites,cumulates and volcanic rocks.Each unit of ophiolite occurs as tectonic melange respectively.Spinels are only seen in spinel-lherzolites and are anhedral to subhedral in shape.The analysis of spinels show that the peridotites have undergone the environmental from mid-ocean ridge to subduction zone,and emplaced in subduction zone.So it belongs to SSZ-type ophiolite.The study provides important data for probing into the evolution of Kunlun Mountain.
出处
《矿物岩石》
CAS
CSCD
北大核心
2002年第3期1-4,共4页
Mineralogy and Petrology
基金
国家"九.五"科技攻关 3 0 5项目 996-915 -0 6-0 3 )资助
