宁镇山脉五通组、高郦山组的剩磁特征及构造意义  

Paleomagnetism of Paleozoic Wutong and Gaolishan formations and its tectonic implication

作　　者：邹乐君[1] 沈晓华[1] 沈忠悦[1] 朱建丽[1] 方大钧[1] 

机构地区：[1]浙江大学地球科学系,浙江杭州310027

出　　处：《浙江大学学报（自然科学版）》2000年第6期619-623,共5页

基　　金：国家自然科学基金资助项目! (4 99740 16 )

摘　　要：通过岩石磁学、磁清洗和剩磁组分分离 ,结合野外地质实际 ,对宁镇山脉湖山地区晚泥盆世五通组、早石炭世高郦山组岩石作了剩磁分析与剩磁年代的探讨 ,确定了三组磁组分 :特征剩磁、印支期和燕山期重磁化组分 .从古地磁偏角数据 ,确认了古生代局部旋转运动的存在 。Rock magnetism, demagnetism and magnetic remanence isolation were performed on the samples from Paleozoic Wutong formation and Gaolishan formation in Ningzhen area. Three magnetic components were identified as characteristic remnant magnetization. Indosinian remagnetization and Yanshanian remagnetization. With the paleomagnetic results, we believe that there were local rotations among blocks in the studied area. The evolution and motion of the Lower Yangtze Block since Paleozoic age were discussed.

关 键 词：古地磁 剩磁分析 岩石磁学 宁镇山脉 高郦山组 

分 类 号：P318.4[天文地球—固体地球物理学] P542.3[天文地球—地球物理学]