There are three diwa regions in South Siberia and West Mongolia. One of them is arranged in West Transbaikalia and was formed from Devonian till Carboniferous periods. Numerous deposits of tungsten , tin, molybdenum, ...There are three diwa regions in South Siberia and West Mongolia. One of them is arranged in West Transbaikalia and was formed from Devonian till Carboniferous periods. Numerous deposits of tungsten , tin, molybdenum, REE, synnyrites, urtites are genetically linked with intrusive rocks. The next diwa region is arranged in North Mongolia and South Buryatia. This diwa region was formed in the Late Paleozoic time. The deposits of molybdenum, tungsten, boron, iron, copper, beryllium are genetically linked with magmatic rocks of this region. The third region was formed in Devonian in West Mongollia. The magmatic rocks of this region are represented by alkaline granitoids. Some deposits of REE and rare metals are linked with these rocks.展开更多
Ejina rangeland is located in Alashan Laegue, west part of Innermongolian Autono-mous Region with a area of 1.22×10~4 square Km of which the available area is 6940 squareKm, Because the varieties of reasons, such...Ejina rangeland is located in Alashan Laegue, west part of Innermongolian Autono-mous Region with a area of 1.22×10~4 square Km of which the available area is 6940 squareKm, Because the varieties of reasons, such as natural, human, historic and present, therunoff of Ejina River is decreased year by year, the irrigated area of the rangeland is de-creased. The deterioration of the ecologic environment is caused by the degeneration of展开更多
文摘There are three diwa regions in South Siberia and West Mongolia. One of them is arranged in West Transbaikalia and was formed from Devonian till Carboniferous periods. Numerous deposits of tungsten , tin, molybdenum, REE, synnyrites, urtites are genetically linked with intrusive rocks. The next diwa region is arranged in North Mongolia and South Buryatia. This diwa region was formed in the Late Paleozoic time. The deposits of molybdenum, tungsten, boron, iron, copper, beryllium are genetically linked with magmatic rocks of this region. The third region was formed in Devonian in West Mongollia. The magmatic rocks of this region are represented by alkaline granitoids. Some deposits of REE and rare metals are linked with these rocks.
文摘Ejina rangeland is located in Alashan Laegue, west part of Innermongolian Autono-mous Region with a area of 1.22×10~4 square Km of which the available area is 6940 squareKm, Because the varieties of reasons, such as natural, human, historic and present, therunoff of Ejina River is decreased year by year, the irrigated area of the rangeland is de-creased. The deterioration of the ecologic environment is caused by the degeneration of
文摘以内蒙古自治区西部地区作为研究区,在分析钻孔及实验数据组的基础上,依据GB 50007—2011《建筑地基基础设计规范》,以地理信息系统数字平台(ArcView GIS)为载体,以1∶5万地质图及地形图为底图,对研究区进行冻胀等级分区,分区方法及成果具有实用性及可操作性;同时采用数据分析软件的方差分析(analysis of variance,ANOVA)法,对影响冻胀等级划分的因素进行统计分析,结果表明地下水埋深在冻胀等级划分中起着决定性作用。
