六盘山群磁性地层年代MAGNETOSTRATIGRAPHY OF THE LIUPANSHAN GROUP,CENTRAL CHINA
戴霜,朱强,胡鸿飞,唐玉虎,黄永波,刘俊伟,孔立,方小敏
摘要(Abstract)：
六盘山群磁性地层年代研究是认识鄂尔多斯西缘逆冲带和我国现今构造—环境格局形成的关键途径之一。通过对六盘山盆地中北部火石寨剖面厚730m的沉积地层进行高分辨率的古地磁采样测量,发现了11个长的正极性柱和11个短的负极性柱,可与标准极性柱M3n至M—"3r"段进行很好的对比,并与已有的生物化石资料显示的年代对应,从而获得六盘山群的年代约为127—100Ma。
关键词(KeyWords)： 磁性地层;早白垩世;六盘山群;鄂尔多斯;六盘山;甘肃
基金项目(Foundation): 国家自然科学基金(40571017、40721061);; 国家重点基础研究发展计划(2005CB422001);; 高等学校学科创新引智计划(No.B06026)资助
作者(Author): 戴霜,朱强,胡鸿飞,唐玉虎,黄永波,刘俊伟,孔立,方小敏
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