浅谈滇西北羊拉矿区基性岩地球化学特征及构造意义

Introduction to northwest yunnan sheep pull mine rock geochemical characteristics and tectonic significance

本文主要探讨滇西北羊拉矿区基性岩地球化学特征及构造意义,首先通过对该地区基性岩以系统性研究,主要研究项目为基性岩的微量元素与主量元素的构成。研究以滇西北金沙江羊拉矿区基性岩为实验背景,同时将其地质构造作为研究依据。分析结果得出滇西北羊拉矿区的地球化学性质相似的基性岩为玄武岩,该玄武岩为石炭统贝吾组以及白茫雪山。二者的玄武岩同时具有一定的特征——洋脊特征。主要表现为该地的玄武岩经过稀土元素分馏发现K、Ti元素的含量较低,且轻稀土元素与重稀土元素无法实施明显的分馏处理。除此以外通过对其微量元素的相关特征分析得到滇西北羊拉矿区的玄武熔岩来源区域为微量元素富集区,属于金沙江洋盆地经过一定的扩张后所产生的元素,从组成部分方面分析其为缝合带地区组成。

Thispaper mainly discusses the northwest yunnan sheep pull mine rock geochemical characteristics and tectonic significance, first of all, based on the rock in the region in a systematic research, the main research projects for the rock of trace elements and the composition of the main elements. Research in northwest yunnan jinsha sheep to pull the experimental background of mine rock, the geological structure at the same time as the research basis. The results of the analysis it is concluded that the geochemical nature of northwest yunnan sheep pull mining area rock is similar to that of basalt, the basalt of carboniferous repeatedly I group and the white snow mountain. Both the basalt has certain features - ridge at the same time. Main show is the area of basalt after fractionation of rare earth elements found a lower content of K,Ti element, and the light rare earth elements and heavy rare earth elements can not be implemented obvious fractionation process. In addition to its characteristics of trace element analysis related to get mining area of northwest yunnan sheep, basaltic lava source area for trace elements, belongs to the jinshajiang ocean basin after certain expansion of elements, from the aspects of component analysis for suture zone area.