陕西华阳川碳酸岩地质学和岩石学特征及其成因初探

GEOLOGICAL, PETROL-MINERALOGICAL CHARACTERISTICS AND ORIGIN OF THE CARBONATITES FROM HUAYANGCHUAN,SHAANXI PROVINCE

本文提供了陕西华阳川碳酸岩产状、规模形态、空间分布、围岩蚀变和主要造岩矿物特征,以及相互关系等方面的研究资料,初步论证了华阳川碳酸岩的成因。

This paper provides some information about geological, petrol-mineralogical characteristics of carbonatites from Huayangchuan, Shaanxi Province. These data show that Huayangchuan carbon-atites are the later carbonatite, which formed by the primary carbonatite' s magma rich in alkaline composition. The occurrence, forms, scale and distribution of the Huayangchuan carbonatites are controled by the multiple-cycle and multiple-stage activity of the deep fault structure systems in this region. The stable environments of the ancient swelling regions and deep fault systems where occurred carbonatites would provide possibility for carbonatite magmatism.