Timing of the Nihewan formation and faunas
Timing of the Nihewan formation and faunas
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DOI：
10.1016/j.yqres.2007.10.006
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发表时间：
2008-01-01
影响因子：
2.3
通讯作者：
Pan, Yongxin
中科院分区：
文献类型：
--
作者：
Deng, Chenglong;Zhu, Rixiang;Pan, Yongxin
通过对泥河湾盆地河湖层序的磁地层测年，确定了泥河湾盆地的充填时间和相关的哺乳动物区系。结合泥河湾盆地东部洪崖和花堡沟剖面的古地磁新发现和已有的磁年表资料，认为泥河湾组记录了上新世—更新世泥河湾盆地的构造—沉积过程，泥河湾动物群可被置于matuyama—brunhes地磁倒转和Olduvai亚时（0.78 ~ 1.95 Ma）开始之间。盆地沉积的开始和结束分别发生在高斯-松山地磁倒转之前和末次间冰期至末次冰期晚期，表明泥河湾组的沉积时代为晚上新世至晚更新世。泥河湾动物群由马良、东古沱、小长梁、半山、马池沟、花堡沟、下沙沟、大南沟和东瑶子头等一系列哺乳动物群组成，时间跨度约为0.8 ~ 2.0 Ma。我们的新磁地层学与以前发表的磁地层学相结合，大大改进了陆地泥河湾组和动物的年代学。(C) 2007年华盛顿大学。版权所有。
Magnetostratigraphic dating of the fluvio-lacustrine sequence in the Nihewan Basin, North China, has permitted the precise timing of the basin infilling and associated Nihewan mammalian faunas. The combined evidence of new paleomagnetic findings from the Hongya and Huabaogou sections of the eastern Nihewan Basin and previously published magnetochronological data suggests that the Nihewan Formation records the tectono-sedimentary processes of the Plio-Pleistocene Nihewan Basin and that the Nihewan faunas can be placed between the Matuyama-Brunhes geomagnetic reversal and the onset of the Olduvai subchron (0.78-1.95 Ma). The onset and termination of the basin deposition occurred just prior to the Gauss-Matuyama geomagnetic reversal and during the period from the last interglaciation to the late last glaciation, respectively, suggesting that the Nihewan Formation is of Late Pliocene to late Pleistocene age. The Nihewan faunas, comprising a series of mammalian faunas (such as Maliang, Donggutuo, Xiaochangliang, Banshan, Majuangou, Huabaogou, Xiashagou, Danangou and Dongyaozitou), are suggested to span a time range of about 0.8-2.0 Ma. The combination of our new and previously published magnetostratigraphy has significantly refined the chronology of the terrestrial Nihewan Formation and faunas. (C) 2007 University of Washington. All rights reserved.