二连盆地下古近系的磁性地层学研究MAGNETOSTRATIGRAPHY OF THE EARLY PALEOGENE IN THE ERLIAN BASIN
孙勃,岳乐平,王元青,孟津,王建其,徐永
摘要(Abstract)：
古地磁的测试结果表明,蒙古高原二连盆地努和廷勃尔和与呼和勃尔和地区剖面早古近纪地层共记录了5个正极性段与6个负极性段,通过与2004年标准极性年代表对比,确认其可与C21r-C26r之间的极性带对应。脑木根组以晚古新世沉积为主,同时接受了始新世最早期部分沉积及少许中古新世;阿山头组跨越了早—中始新世,持续时间较长;伊尔丁曼哈组的时代为中始新世。同时,确定了含Lambdopsalis,Prionessus及Palaeostylops的化石层的时代为晚古新世最早期;Gomphos层的年龄大致与古新世-始新世界线的年龄相当。
关键词(KeyWords)： 磁性地层学;亚洲陆生哺乳动物期(ALMA);古近纪;努和廷勃尔和—呼和勃尔和地区;二连盆地;内蒙古
基金项目(Foundation): 国家自然科学基金(No.40532010,40372202);; 西北大学大陆动力学国家重点实验室开放基金资助
作者(Author): 孙勃,岳乐平,王元青,孟津,王建其,徐永
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