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红石山基性火山岩为红石山蛇绿岩的重要组成单元之一,有关其形成的构造环境一直存在分歧,因此影响了对该蛇绿岩的性质、形成和演化方面的深入研究,笔者在野外对红石山一带的基性火山岩地质特征进行了详细的观察,在结合前人研究资料的基础上,利用地球化学(主量、微量及稀土元素)及Sm-Nd同位素分析等对其构造背景进行了多种手段相结合的判断和分析,确定红石山蛇绿岩其形成于洋中脊环境,时代定为早石炭世。
The Hongshishan basic volcanic rocks, as one of the important constituent units of Hongshishan ophiolite, have been disagreement about the tectonic environment they formed, thus affecting the further study on the nature, formation and evolution of this ophiolite. The geological characteristics of the basic volcanic rocks in Hongshishan area are observed in detail. Based on the previous research data, geochemical background (major, minor and rare earth elements) and Sm-Nd isotopic analysis are used to analyze the tectonic setting A combination of a variety of means of judgment and analysis to determine the Hongshi Shan ophiolite formed in the mid-ocean ridge environment, the age set as Early Carboniferous.