论文部分内容阅读
1地质背景内蒙古东乌珠穆沁旗地区位于西伯利亚板块东南缘查干敖包—奥尤特—朝不楞早古生代构造-岩浆岩带东段,其东南侧就是西伯利亚板块与华北板块的缝合带——二连浩特—贺跟山深大断裂带(聂凤军等,2007;张万益等,2009)。区域范围内出露的地层有中奥陶统、上志留统、泥盆系、下二叠统、侏罗系和白垩系火山-沉积岩以及第三系和第四系沉积物。区内岩浆岩分布广
1 Geological Background The Dongwumuqinqinqi area in Inner Mongolia is located in the eastern part of the Chagan-Oute-Chao-Auron tectono-magmatic belt in the southeast margin of the Siberian plate. On the southeast it is the suture zone between the Siberian and North China plates - - Erenhot-He-Shan deep fault zone (Nie Fengjun et al., 2007; Zhang Wanyi et al., 2009). The strata exposed in the area are Middle Ordovician, Upper Silurian, Devonian, Lower Permian, Jurassic and Cretaceous volcanic-sedimentary rocks, and Tertiary and Quaternary sediments. The magmatic rocks in the area are widely distributed