鄂西建始龙骨洞含古人类化石沉积层磁性年代学再研究MAGNETOSTRATIGRAPHIC RESTUDY OF THE LONGGU CAVE WITH THE HOMININS FOSSILS AT JIANSHI COUNTY, WEST HUBEI
施林峰,王喜生,杨振宇
摘要(Abstract)：
由于湖北建始龙骨洞洞穴沉积地层年代存在疑问,对建始龙骨洞沉积剖面的154块样品进行了磁性地层学再研究,并建立了磁极性序列,结果显示龙骨洞沉积地层记录了单一的反极性序列,仅在距顶部0.93m处存在一个短期的正极性事件。将龙骨洞剖面极性柱与国际标准极性柱对比,反极性序列应对应于松山反极性时,正极性事件可对应于Cobb Mountain或者留尼旺正极性事件。如果龙骨洞沉积中的哺乳动物年代偏向早更新世,后一种对比方案可能更合理。由此龙骨洞哺乳动物群年龄为1.945—2.581Ma,古人类化石年龄为2.148—2.581Ma。
关键词(KeyWords)： 磁性地层;哺乳动物;古人类;第四系;龙骨洞;建始;湖北
基金项目(Foundation): 中国地质调查局地质调查项目(No1212010511704)
作者(Author): 施林峰,王喜生,杨振宇
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