【摘要】 ∶内蒙古大青山地区的临河—集宁断裂带是华北板块北缘的一条重要断裂带。它主要由韧性剪切带、韧脆性剪切带和推覆构造等构成。推覆构造自南向北可分为叠瓦逆冲推覆构造带、紧闭褶皱—逆冲断层变形带、宽缓褶皱—断层转折褶皱带、滑脱褶皱—断层传播褶皱带等4个变形带。断裂带从韧性到脆性表示了其出露深度不同,并有由南到北活动强度逐渐减弱的趋势。该区主要分布有以金为主的多金属矿床和以煤、大理岩为主的非金属矿床。区内金多金属矿床多与韧性剪切带有关,断裂构造为金属矿床的形成提供了空间,也是成矿物质的通道。研究指出了该地区的找矿前景与方向。更多还原

【Abstract】 Linhe-Jining faulted zone in the Daqingshan area,Inner Mongolia,is an important faulted zone in the north margin of North China craton.The faulted zone consists mainly of ductile shear belt,ductile-brittle shear belt and nappe structures.The nappe structures in the area are formed in the late Cretaceous and may be divided into 4 deformable zones,namely,imbricated thrust nappe structure zone,closed folded-thrust faulted deformable zone,wide-gentle folded-faulted turned folded zone and decollement folded-faulted spreaded folded zone.The deformation of the faulted zones changes from ductile shear to brittle shear,indicating the different formation depths of the faulted zones.The intensity of the fault motions is gradually weakened from south to north.In the area there are distributed metallic deposits mainly of gold-polymetallic and nonmetallic deposits dominately of coal and marble.The gold-polymetallic deposits are mostly related with the ductile shear zone,the faulted structures were the channels for the ore-forming materials and provided the speces for the formation of metallic deposits.The research results also pointed out the perspect and direction of ore-prospecting in the area.更多还原