Magnetochronological sequence of the Early Pleistocene Gigantopithecus faunas in Chongzuo, Guangxi, southern China
Magnetochronological sequence of the Early Pleistocene Gigantopithecus faunas in Chongzuo, Guangxi, southern China
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DOI：
10.1016/j.quaint.2013.08.049
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发表时间：
2014-12
影响因子：
2.2
通讯作者：
LU Sun;Yuanquing Wang;Caicai Liu;T. Zuo;J. Ge;Min Zhu;Chang-zhu Jin;C. Deng;R. Zhu
中科院分区：
文献类型：
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作者：
LU Sun;Yuanquing Wang;Caicai Liu;T. Zuo;J. Ge;Min Zhu;Chang-zhu Jin;C. Deng;R. Zhu
南方古猿动物群是中国南方早更新世最重要的哺乳动物群之一，但其年代多为洞穴或裂隙沉积。本文介绍了崇左地区白空洞、菊园洞、三河洞、雀雀洞等4个洞穴沉积序列的磁性地层学新成果。磁铁矿是洞穴沉积物中特征剩余磁化强度的主要载体。通过结合磁性地层学和生物年代学数据实现了地磁极性时间尺度的相关性。我们的对比表明，洞穴沉积序列跨越前Olduvai Matuyama时的Jaramillo亚时。结合磁生物年代学建立了崇左地区早更新世巨猿动物群的年代框架。早更新世巨猿动物群序列的年龄分别为：白孔洞1.2Ma，菊园洞1.8Ma，三河洞1.2Ma，雀雀洞1.0Ma。崇左地区河流下切速率约为14 mm/ky。
TheGigantopithecusfauna, the most important mammalian fauna during the Early Pleistocene in southern China, was usually excavated from cave or fissure deposits without precise age constraints. Here we present new magnetostratigraphy results for four cave sedimentary sequences in Chongzuo, Guangxi Zhuang Autonomous Region of southern China, from the highest and oldest to the lowest and youngest including Baikong Cave, Juyuan Cave, Sanhe Cave and Queque Cave. Magnetite was identified as the major carrier of characteristic remnant magnetizations in the cave deposits. Correlation to the geomagnetic polarity time scale was achieved by combining magnetostratigraphic and biochronologic data. Our correlation suggests that the cave sedimentary sequences span from the pre-Olduvai Matuyama chron to the Jaramillo subchron. The combined magneto-biochronology leads to the establishment of a chronological framework for the Early PleistoceneGigantopithecusfaunas in Chongzuo area. TheGigantopithecusfaunal succession of Early Pleistocene were assigned to estimated ages of ∼2.0 Ma (Baikong Cave), ∼1.8 Ma (Juyuan Cave), ∼1.2 Ma (Sanhe Cave) and ∼1.0 Ma (Queque Cave), respectively. The river incision rate in Chongzuo area during this time span was estimated to be ∼14 mm/ky.