摘要
本文通过对太原西山奥陶系碳酸盐岩中文石、方解石的差热分析、微量元素分析以及氧碳同位素的测定,认为该文石是在成岩作用过程中受大气淡水的影响并在构造压力的作用下形成的,而与成岩水介质中的锶(Sr)含量无关。文石和方解石中Sr含量的不同是受矿物晶体本身的结构所控制。
Based on the differential thermal analyses, trace element and oxygen and carbon isotope determinations of aragonite and calcites nearby in the Ordovician carbonates of Taiyuan Xishan,it is concluded that the aragonite was formed during diagenetic process under the influence of meteoric water and tectonic stress, and that its formation is not controlled by the Sr contents of diagenetic fluids. The difference of Sr concentrations between aragonite and calcite is governed by their own crystal structures.
基金
煤炭部基金
关键词
文石
方解石
太原市
Aragonite
calcite
trace element
isotope
