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中国东部橄榄安粗岩省以大范围内(约80000km~2)分布晚侏罗世—早白垩世(165—100Ma)橄榄安粗岩系为主、高钾钙碱岩系为次的火山岩组合为特征,它形成以拉张为主的区域构造应力场中。与国外岛弧及活动大陆边缘同类岩石相比,其火山岩的岩石—矿物—地球化学特征及有关的矿床组合均有一定的特殊性,这些特殊性是本区壳幔成分与结构及中生代区域构造背景特殊性的综合体现。
Oliguangan rock province of eastern China is mainly composed of olivanan coarse-grained rock series of Late Jurassic-Early Cretaceous (165-100Ma) distributed in a large area (about 80,000 km 2), and the high-K calc-alkaline rock series is volcanic assemblage It is characterized by the tension-dominated tectonic stress field. The rock-mineral-geochemical characteristics of the volcanic rocks and the related ore-bearing assemblages have certain peculiarities compared with the foreign arcs and similar continental margins of the active continental margin. These particularities are the composition and structure of the crust and the Mesozoic regional structure A comprehensive manifestation of the particularity of the background.