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拉脊山造山带是在晋宁期基底上 ,由于断裂作用而形成的。拉脊山南北各有一条边界断裂 ,两断裂在早古生代由张性转化为压性具有重大意义 ,它们直接控制了火山岩和蛇绿岩套的时空分布 ,并影响火山岩和蛇绿岩套具有的一系列特征。按照“开”“合”观点对火山岩的岩石和岩石地球化学进行时序分析 ,证实了拉脊山造山带经历了一个完整的“开”“合”旋回 ,还可进一步划分为 3个次级“开”“合”旋回。拉脊山的蛇绿岩套仅限于∈ 3地层中 ,并有本身的一些特征 ,是一种新类型的蛇绿岩套 ,代表了小洋盆的基本特征。
The ridge ridge orogen is formed on the base of Jinning Period due to the fracture. Each ridge has a boundary fault between north and south of Ridge Mountains. The two faults were of great significance in the early Paleozoic, and they directly controlled the spatiotemporal distribution of volcanic rocks and ophiolite sets and affected the volcanic rocks and ophiolite sets Series of features. Time-series analysis of volcanic rock and rock geochemistry according to the “open” and “close” views confirmed that the Laji Mountain orogenic belt undergone a complete “on” and “coincident” cycle and could be further divided into three secondary “on” “” Hop "cycle. The Ridge ophiolite suite is limited to the ∈ 3 formation and has some characteristics of its own. It is a new type of ophiolite suite and represents the basic characteristics of a small oceanic basin.