草城及周边矿区构造控矿规律及找矿预测

Structural ore-control law and prospecting prediction in Caocheng and surrounding mining areas

通过对草城及周边矿区构造控矿规律的研究,认为矿区赋矿层位在成矿后期首先受NWW方向水平挤压应力作用,产生倒转褶皱,引起陆源物质重熔,出现大规模酸性岩浆体沿褶皱核部底辟侵位,形成了褶皱轴向NNE向线状同斜倒转褶皱。后期在NWW向连续递进的水平挤压应力下,盖家庄岩体与吕梁群之间发生了大规模的韧性剪切活动,产生了限定于褶皱核部的韧性剪切带。在两者的控制下,形成了草城矿区的构造控矿体系。

Based on the study of structural ore-controlling regularity in Caocheng and surrounding mining areas, it is considered that the ore-hosting strata in the mining area are first subjected to horizontal compressive stress in NWW direction in the late metallogenic stage, resulting in inverted folds, resulting in the remelting of terrigenous materials, largescale acid magma emplacement along the bottom of the core of folds, and forming linear NNE-trending folds along the axis of folds. In the later stage, under the NWW progressive horizontal compressive stress, a large-scale ductile shear activity occurred between the Gaijiazhuang rock mass and the Luliang Group, resulting in ductile shear zones confined to the core of the fold. Under the control of both, the structural ore-controlling system of Caocheng mining area was formed.