新疆塔什库尔干祖母绿(绿柱石)成矿区域地质背景研究

本文通过对新疆祖母绿(绿柱石)成矿区域地质背景研究,主要对新疆祖母绿矿床产出地层——温泉沟组地层的火山岩的岩石地球化学特征进行了一系列研究、测试、分析,包括岩石化学特征,微量元素特征,稀土元素特征等,确定其构造环境为消减带活动大陆边缘,洋壳向陆壳俯冲形成岛弧之后的弧后拉张环境.总体上为大陆一侧的活动陆缘(或大陆弧)环境...

Research on Metallogenic Geological Background of Emerald in Taxkorgan, Xinjiang

Based on research on regional metallogenic background of emerald (beryl) in Xinjiang, the authors made a systematic study, test and analysis of petrologic geochemical characteristics of volcanic rocks in strata of Wenquangou Fomration, the strata that produced emerald deposits, which included its petrologic chemical characteristics, trace elements and REE, and determined that its tectonic environment was an active epicontinental subduction zone, i.e., a back-arc pull-apart environment formed after the formation of island arc resulting from the subduction of the ocean crust towards the continental crust. It was generally an active epicontinental environment on the side of the continent, and somewhat had characteristics of the transition from the island arc to the continent.