长江中下游转换构造结与区域成矿背景分析  

Transform Tectonic Node of the Middle and Lower Reaches of the Yangtze River and Analysis of Regional Metallogenic Settings

作　　者：宋传中[1] 张华[1] 任升莲[1] 李加好[1] Lin Shoufa 涂文传[1] 张妍[1] 王中[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]Department of Earth Sciences, University of Waterloo, Ont. , Canada N2L 3G1

出　　处：《地质学报》2011年第5期778-788,共11页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号40372097、40772131、41072161);中国地质调查局科技项目(编号1212011121114);安徽省公益性地质研究项目(编号2008-g-5);合肥工业大学重大项目预研基金项目(编号HGZY00008);中石化基础研究项目(编号20070902)联合资助成果

摘　　要：中国东部中生代以来的地壳运动频繁,构造演化复杂,岩浆活动剧烈,成矿作用多样,是不同体制构造转换的重要地区。长江中下游地区是中生代特提斯构造体制与太平洋构造体制转换的经典地区,是两大构造体制交汇和转换的焦点部位,具有岩石圈物质重组、结构重建的时-空演化关系。长江中下游转换构造结由是中国东部中生代特提斯构造体制与太平洋构造体制转换的产物,大别造山带、郯庐断裂带和长江中下游成矿带直接记录了两大构造体制转换的过程、沉积-构造-岩浆-成矿的时空关系和动力学背景。长江中下游转换构造结内构造叠加强烈,规律明显,以长江复合构造带和铜陵-杭州构造带为代表的NE-SW向构造带和NW-SE向构造带,严格控制着区内燕山期岩浆活动和长江中下游成矿带的展布;长江中下游转换构造结内具有结点成矿的规律,不同规模的NE-SW向构造带与NW-SE向构造带的交切处正是区内矿集区和重要矿床的分布位置。East China,which had experienced frequent crustal movement,complex tectonic evolution,intense magnetism,and diverse mineralization since the Mesozoic era,is an important area in various tectonic regime transform.The Middle and Lower Reaches of the Yangtze River is a typical area where the tectonic system converted from Mesozoic Tethys tectonic regime to the Pacific tectonic regime.It is a focal point of the two tectonic regimes met and transformed,with the relationship between spatial and temporal evolution of lithospheric material reorganization and structural reconstruction.The structural knots of the Middle and Lower Reaches of Yangtze River were the result of tectonic regime transition between Tethys and Pacific tectonic regimes in eastern China,The Dabie Orogenic belt,Tan-Lu Faulting belt,and Middle-Lower Reaches of Yangtze River metallogenic belts directly recorded the transition process of the two tectonic regimes,spatial-temporal relations between deposition-tectonic-magmatic-metallogenic and dynamic setting.The Middle and Lower Reaches of Yangtze River structural knot has distinct regularity of structural overlapping.The magmatic activity and the distribution of the metallogenic belt along the Middle and Lower Reaches of the Yangtze River area are controlled strictly by NE-SW trending structural belt represented by Yangtze River compound structural belt and NW-SE trending structural zones represented by Tongling-Hangzhou structural belt.Node-type mineralization can be found within the structural knots of the Middle and Lower Reaches of Yangtze River.Therefore,the intersection positions between various-scale NE-SW trending structural belts and NW-SE trending structural belts are the locations of ore concentration areas and important deposits.

关 键 词：中生代 长江中下游 构造结 岩浆活动 成矿带 

分 类 号：P612[天文地球—矿床学]