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1区域地质背景巴音塔拉位于华北地台北缘与内蒙古海西褶皱带接合部位,属于二连盆地腾格尔坳陷南缘的次级构造单元。它是在加里东褶皱带基底上发展起来,由温都尔庙-多伦复背斜演化而来的温都尔庙隆升带上的北北东向狭长断陷系列湖盆之一凹陷主体呈北东向展布,呈狭长的“L”形,凹陷基底由下二叠统海底火山喷发建造和上侏罗统中酸性火山碎屑岩及熔岩组成,东南侧蚀源区出露大面积燕山期岩体。
1 Regional Geological Background Bayantala is located in the junction of the northern margin of North China Platform and the Hercynian fold belt in Inner Mongolia and belongs to the secondary structural unit on the southern margin of the Tengger Depression in the Erlian Basin. It was developed on the basement of the Caledonian fold belt and developed from the Wenduermiao-Duolun complex anticline, Showing a north-easterly distribution with a long and narrow “L” shape. The sag underlying the basement is composed of the Lower Permian submarine volcano eruption and the upper Jurassic intermediate-acid volcaniclastic rocks and lava, while the southeast eclogite source area is exposed Large-scale Yanshanian rock mass.