浅述宁夏大地构造单元划分  

Brief introduction to ground tectonic units subdivision of Ningxia

作　　者：白生明[1] 

机构地区：[1]宁夏回族自治区国土资源调查监测院,宁夏银川750004

出　　处：《宁夏工程技术》2014年第2期117-122,共6页Ningxia Engineering Technology

基　　金：宁夏回族自治区矿产资源潜力评价(1212011121027)

摘　　要：宁夏大地构造单元的划分是在系统收集与综合已有研究成果的基础上,对宁夏区内沉积建造构造、侵入岩浆构造、变质建造构造和大型变形构造等进行了分析研究,对宁夏稳定陆块区和造山系的特点进行了综合研究,对宁夏大地构造单元进行了较为合理的划分和充分的表达.而大地构造单元的划分主要服务于成矿区带的划分和成矿规律的研究.以龙首山—六盘山断裂为界,将宁夏大地构造单元划分出华北陆块区和秦祁昆造山系2个Ⅰ级构造单元;鄂尔多斯陆块和北祁连弧盆系2个Ⅱ级构造单元;鄂尔多斯盆地、贺兰山被动陆缘盆地、走廊弧后盆地和走廊南山岛弧4个Ⅲ级构造单元;盐池—彭阳坳陷、贺兰山被动陆缘裂陷带、银川新生代断陷盆地、鄂尔多斯西缘被动陆缘坳陷、阿拉善南缘前陆盆地、香山弧后盆地、南山东端火山弧、南山东端弧背盆地8个Ⅳ级构造单元.为宁夏矿产资源潜力评价提供了可靠的基础地质背景资料及下一步的找矿工作奠定了理论基础.Ground tectonic units division of Ningxia is representation for analysis of sedimentary structures, intrusive magmatic structure, metamorphic structures and large deformation structures, feature of stable land areas and orogenic system on the basis of geological surveys and previous research. Ground tectonic units subdivisions mainly server metatlogenic region subdivision and mineralization law research. Along I^ngshoushan - Liupanshan break boundary, Ningxia ground tectonic units can be divided to 2 ｜ grade tectonic units： North China Craton region and Qin-Qi-Kun orogenic system, 2 ]1 grade tectonic units： Ordos land block and North Qilian arc basin system, 4 m grade tectonic units： Ordos Basin, Helan Mountain passive margin basin, corridor arc basin and corridor Nanshan island arc basin, 8 IV grade tectonic units： Yanchi - Pengyang depression, Helanshan passive margin rift zone, Yinchuan Cenozoic rift basin, western margin of Ordos passive margin depression, Alxa foreland basin, Xiangshan arc basin, Nanshan easternmost volcanic arc, arc back basin, Nanshan easternmost., These can provide geological background information for mineral resource potential evaluation of Ningxia and provide a reliable foundation for next prosoecting work.

关 键 词：北祁连弧盆系 鄂尔多斯陆块 宁夏大地构造 构造单元划分 

分 类 号：P544[天文地球—构造地质学]