| 内蒙古大青山地区地质构造与成矿 |
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| 引用本文： | 李洪喜,;徐士银,;张庆龙,;杜松金,;杜菊民,;解国爱.内蒙古大青山地区地质构造与成矿[J].火山地质与矿产,2008(3):204-211. |
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| 作者姓名： | 李洪喜 ;徐士银 ;张庆龙 ;杜松金 ;杜菊民 ;解国爱 |
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| 作者单位： | [1]山东正元资源勘查研究院,济南250014; [2]南京大学地球科学系,南京210093 |
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| 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、宽缓褶皱一断层转折褶皱带、滑脱褶皱一断层传播褶皱带等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。
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| 关 键 词： | 韧性剪切带 推覆构造 金多金属矿床 内蒙古 |
Tectonics and mineralization in Daqingshan region,Inner Mongolia |
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| Institution: | LI Hong-xi, XU Shi-yin ZHANG Qing-long, DU Song-in, DU Ju-min, XIE Guo-ai ( 1 Shangdong Zhengyuan Institute of Mineral Resources, China Exploration and Engineering Bureau, Jinan 250014, China;2 Department of Earth Sciences, Nanjing University, Nanjing 210093, China) |
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| 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. |
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| Keywords: | ductile shear zone thrust nappe structure gold-polymetallic deposits Inner Mongolia |
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