大兴安岭中南段壳幔结构特征及对矿床的控制作用  

Characters of crust-mantle structure and its control to deposits in the middle and southern section of Da Hinggan Mountains

作　　者：马光[1] 宫丽[1] 王春[1] 丁东业[2] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]山东理工大学资源与环境工程学院,山东淄博255049

出　　处：《西北大学学报（自然科学版）》2014年第5期789-794,共6页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40072032);河南理工大学博士基金资助项目(648512)

摘　　要：大兴安岭中南段存在的总体明显呈北东—南西向的重力异常和磁法异常表明,该地区存在规模宏大的重力梯度带,在北东—北北东方向展布的嫩江超壳断裂附近,从北西到南东,地壳厚度骤减5 km。东部上地幔隆起区和西部上地幔凹陷区以及两者之间的斜坡上,特别是地壳厚度陡变带和深部两组断裂构造的交汇部位,控制了含矿岩浆、热液的运移和就位,形成了总体呈北东—南西向展布的铁(锡)铅锌多金属矿床,成为中国重要的有色金属成矿带之一。The gravity anomalies and magnetic anomalies trending NE-SW indicate that there has a grandiose gravity gradient belt in the middle and southern section of Da Hinggan Mountains.Near the Nenjiang ultracrustal deep faults trending NE-NNE,the crustal thickness reduced 5 km sharply from northwest to southeast.On the slope between the eastern uplift areas and western depression region of upper mantle,especially the rapid-change belt of the crust thickness and the intersections of two deep fracture structure controlled migration and positive emplacement of magma and hydrotherm containing ore,formed the Fe （Sn） Pb Zn polymetallic deposit tending generally NE-SW,and it became an important metallogenic belt of non-ferrous metals in our country.

关 键 词：地幔 物理勘探 矿床 大兴安岭 

分 类 号：P618.42[天文地球—矿床学]