1975年内蒙古区测队七分队在大兴安岭南部、即内蒙古西乌珠穆沁旗与辽宁省林西县交界地区进行地质调查时,在巴彦宝力格公社(猴头庙)一带发现了连续的海相中、上石炭统。地层区划属准噶尔—内蒙古—兴安岭地层区,内蒙古—松花江地层分区,西乌珠穆沁旗小区。大地构造位置处于阿尔泰—蒙古弧形构造带东段(即内蒙古—兴安褶皱系,内蒙古褶皱带)米生庙复背斜南北两翼。 In 1975, Inner Mongolia Inspectorate Detachment 7 found a series of geological surveys in the southern part of Daxinganling, that is, the junction of Xiwuzhuqin Banner in Inner Mongolia and Linxi County in Liaoning Province. Marine, Upper Carboniferous. Stratum zoning is Junggar - Inner Mongolia - Xinganling stratigraphic area, Inner Mongolia - Songhuajiang stratigraphic division, west Wuzhu Muqinqi district. The tectonic location is located in the north and south wings of the Mianshengmiao complex anticline in the eastern segment of the Altai-Mongolia arc structure (ie Inner Mongolia-Xingan fold system and Inner Mongolia fold belt).