Paleosecular variations refining the chronology of the sediments from the Pearl River Delta, southern China

Paleosecular variations refining the chronology of the sediments from the Pearl River Delta, southern China
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古时代变化完善了中国南部珠江三角洲沉积物的年代学

DOI:
10.1177/0959683612467480
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发表时间:
2013-02
期刊:
The Holocene
影响因子:
--
通讯作者:
Jiahua Wang
Jiahua Wang
中科院分区:
其他
文献类型:
--
作者:
Xiaoqiang Yang;Jie Yang;Zhihua Su;Wenya Huang;Jiahua Wang

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本文利用放射性碳定年方法,获得了珠江三角洲沉积物中6kyr以来的高分辨率古气候变化记录,包括方向和相对强度。与其他邻近记录的方向和相对强度的比较证实,非偶极子场在百年到千年的时间尺度上有共同的波动。这种模式为不同沉积环境下的沉积序列对比提供了深刻的联系点。不同记录之间相似的长期变化特征的显著年龄偏移证实了沉积物定年中的放射性碳误差。这一工作进一步表明,地磁长期变化可以作为一种有效的工具,以确定沉积物的年龄和地层对比的不同沉积环境在一个广泛的区域。
A high-resolution paleosecular variations record since ~6 kyr, including direction and relative intensity, was derived from the Pearl River delta (PRD) sediments in southern China constrained by the radiocarbon ages in this paper. The comparison of both direction and relative intensity with other adjacent records confirmed that the non-dipole field has common fluctuations in the centennial to millennial timescales. This pattern provides some profound tied points to correlate the sediment sequence in the different deposition environments. The significant age offsets of the similar secular variation features between the different records corroborate the radiocarbon errors in dating the sediments. This work further showed that the geomagnetic secular variations can serve as an effective tool to determine the sediments’ age and correlate the stratigraphy for the different deposition environments in a wide region.
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发表时间: 1999-03
影响因子: 2.8
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