CAJ | 학술논문

蛇绿岩成带出现于青藏高原各板块单元边界,其中雅鲁藏布江蛇绿岩带和北祁连山蛇绿岩带规模最大、最为典型,分别代表了秦祁昆和特提斯古大洋的洋壳物质.根据南北2个典型蛇绿岩带的研究实践,讨论了构造背景与岩石地层相结合、结构构造特征与矿物岩石分析相结合、物理化学成因与区域地质工作相结合、岩石类型年代学与地层年代学研究相结合的蛇绿岩研究方法.综合恢复重建古洋壳的古地磁资料分析、扩张速度分析、俯冲速率分析和古生物地球环境分析4种新技术,便可结合蛇绿岩研究比较容易地重建已经消亡了的古大洋岩石圈.这对研究青藏高原岩石圈的演化是有益的.
사록암성대출현우청장고원각판괴단원변계,기중아로장포강사록암대화북기련산사록암대규모최대、최위전형,분별대표료진기곤화특제사고대양적양각물질.근거남북2개전형사록암대적연구실천,토론료구조배경여암석지층상결합、결구구조특정여광물암석분석상결합、물이화학성인여구역지질공작상결합、암석류형년대학여지층년대학연구상결합적사록암연구방법.종합회복중건고양각적고지자자료분석、확장속도분석、부충속솔분석화고생물지구배경분석4충신기술,편가결합사록암연구비교용역지중건이경소망료적고대양암석권.저대연구청장고원암석권적연화시유익적.
Based on the studies of typical ophiolite belts of Yarlung Zangbo and North Qilian where they are the largest in scale and are respectively in representative in paleo-oceanic crust substances of Qinling-Qilian-Kunlun and Tethys,a study using four technique combinations of ophiolite has been put forward. That is combining the tectonic background with rock stratigraphy,combining the structural and tectonic characteristics with minerals and rocks (strata),combining physicochemical genesis with regional geological works,and combining the petrologjc chronology with stratigraphic chronology. By means of palaemagnetic data,expanding velocity, subduction rate,and paleontology and environment analysis, based on ophiolite belt research, it is possible to reconstruct the paleo-o-ceanic lithosphere, which is a great help to understand the evolution history of Qinghai-Tibet Plateau.