内蒙古正镶白旗宝力根套海井田构造地质特征与找煤方向

内蒙古正镶白旗宝力根套海井田为一个新发现的全隐蔽井田,井田含煤地层为侏罗系中、下统阿拉坦合力群,是一套典型的内陆湖泊、河流、三角洲陆相含煤建造。井田为四条正断层所围限的矩形断块,含煤地层的形成严格受构造因素控制,与其所处特殊构造地理位置有关。含煤区处于隆起带的凹陷内,西北及西南为古隆起带,呈直角包围宝力根套海井田,形成有利的聚煤场所—交角构造区。井田与邻区实例对比分析表明:地台内隆起带的凹陷区聚煤的构造控煤模式是该区域的普遍成煤规律,煤易在盆地次边缘沉积,交角构造区更有利于聚煤。通过区域构造特征分析,提出了找煤方向。

Structural Geology Features in Bolgen Tohoi Minefield,Xulun Hobot Qagan Banner,Inner Mongolia

The Bolgen Tohoi minefield in the Xulun Hobot Qagan Banner, Inner Mongolia is a fully hidden minefield; its coal-bearing strata belong to middle, lower Jurassic Ahan Hol Group, a set of typical inland lacustrine, fluvial, delta terrestrial coal-bearing forma- tion. The minefield is a rectangular fault block limited by four normal faults. The formation of coal-bearing strata was strictly controlled by structural factors, and related with special structural and geographical position it situated. Coal-bearing area is a sag within mole track, Bolgen Tohoi minefield is perpendicularly surrounded by a paleo-uplifl from northwest and southwest, thus formed a favorable coal accumulation concourse--intersectional angle tectonic region. Contrastive analysis of the minefield and neighboring area examples has shown： coal accumulation structural coal controlling mode of mole track sag area in platform is general coal-forming pattern in the area. Coal is easy to deposit on basin hypo-margin, especially on intersectional angle tectonic region. Through the regional tectonic characteristic analysis, coal prospecting orientation put forward.