Sea level implications from Late Quaternary/Holocene paleosols from the Oujiang Delta, China

Sea level implications from Late Quaternary/Holocene paleosols from the Oujiang Delta, China
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中国瓯江三角洲晚第四纪/全新世古土壤对海平面的影响

DOI:
10.1017/rdc.2018.77
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发表时间:
2018-09
期刊:
影响因子:
8.3
通讯作者:
Burr George
Burr George
中科院分区:
地球科学4区
文献类型:
--
作者:
Fan Daidu;Shang Shuai;Burr George

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摘要本文描述了在中国东南部瓯江三角洲沉积岩柱中发现的两种滨海古土壤。这些为东海沿岸过去的海平面变化提供了有用的基准。木炭和植物物质的放射性碳(14 C)年代测定表明,一个形成于海洋同位素阶段3(MIS 3),并在末次盛冰期暴露了大约20 ka。另一个形成于全新世早期,在海平面波动期间短暂暴露。类似的古土壤在长江三角洲和中国东海的许多其他地点也有描述。MIS 3古土壤记录了MIS 3期末的区域相对海平面约为-27m。虽然这一数值与东海地区其他古海平面估计值一致,但远高于海平面估计值。
ABSTRACT We describe two coastal paleosols recovered in sediment cores from the Oujiang Delta, Southeast China. These provide useful benchmarks for past sea level change on the East China Sea coast. Radiocarbon (14C) dates on charcoal and plant matter show that one formed during Marine Isotope Stage 3 (MIS 3) and was exposed for perhaps 20 ka, during the Last Glacial Maximum. The other formed in the Early Holocene and was briefly exposed, during a period of fluctuating sea level. Similar paleosols have been described from the Changjiang (Yangtze) Delta, and at many other sites from the East China Sea. The MIS 3 paleosol records a regional relative sea level of about –27 m at the end of MIS 3. While this value is consistent with other paleo sea level estimates for the East China Sea region, it is much higher than predicted by eustatic sea level estimates.
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