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青藏高原东南部特提斯研究是世界地质研究的热点之一,而三江南段-中南半岛地区是该研究的薄弱而分散地区.因此在特提斯构造域背景下,结合地层学、岩石学、构造学及古生物学等前人成果资料,利用中小尺度构造解析,厘定蛇绿岩混杂带构造古地理并论述成矿规律具有重要意义.(1)在特提斯构造格局基础上,圈定出与蛇绿岩空间配套的构造岩浆带,并厘定了缝合带的展布和消减极性规律,建立了构造古地理图,从中可以看出古、中、新特提斯变形依次变弱.(2)古特提斯蛇绿岩带典型蛇绿岩区的地质构造解析研究表明其经历印支期以来多期强烈构造活动改造.(3)蛇绿岩带对部分重要矿产资源的形成及分布具有显著控制作用:蛇绿岩带内的超基性岩是岩浆型钴、镍矿带的重要成矿物质来源;洋壳关闭及板块碰撞过程中形成的与蛇绿岩带平行分布的大面积酸性岩浆是热液型钨锡矿带的重要物质来源;中新世前后的构造转折促进了全区热液型矿床的形成.
The Tethyan study in the southeastern Tibetan Plateau is one of the hotspots in the study of the world geology, and the southern section of the Three Jiangnan-Indochinese Peninsula is a weak and scattered area of the study.Therefore, in the background of Tethys tectonics, combining the stratigraphy, petrology , Tectonics and palaeontology, and so on. It is of great significance to determine the tectonic paleogeography of ophiolitic mixed belts and discuss the metallogenic regularity by using the structure analysis of meso-scale scale. (1) Based on the Tethyan structural pattern, And the tectonic magmatic belt matched with the ophiolitic space, and determined the rules of the distribution and reduction of the suture zone, established the tectonic paleogeography map, from which we can see that the deformations of the Middle, Middle and Neo-Tethys successively weakened. 2) The analysis of the tectonic structure of the ophiolite area in the ancient Tethyan ophiolite shows that it experienced many tectonic activities since the Indo-Chinese epoch. (3) The formation and distribution of some important mineral resources in the ophiolite belt Which has significant control effect. The ultramafic rocks in the ophiolite zone are the important metallogenic sources of magmatic cobalt and nickel ore belts. The large area of the ore-forming material that is formed parallel to the ophiolite zone during the closure of the oceanic crust and the plate collision Acidic magma is Important sources of liquid substance type tungsten tin belt; Miocene structure before and after the transition region to promote the formation of hydrothermal deposits.