Provenance variations in the Holocene deposits from the southern Yellow Sea: Clay mineralogy evidence
Provenance variations in the Holocene deposits from the southern Yellow Sea: Clay mineralogy evidence
复制标题
南黄海全新世沉积物的物源变化：粘土矿物学证据
DOI：
10.1016/j.csr.2014.05.001
复制
发表时间：
2014-11-01
影响因子：
2.3
通讯作者：
Fang, Xisheng
中科院分区：
文献类型：
--
作者：
Li, Jun;Hu, Bangqi;Fang, Xisheng
通过对黄海中部泥质沉积物的物源研究，探讨了全新世粘土矿物的来源和运移过程。YSC-1和YSC-4岩心的粘土矿物组合主要由伊利石组成，其次为蒙脱石和高岭石，少量为蒙皂石。结合已发表的资料，认为长江口细颗粒沉积物很可能是长江和朝鲜半岛小河流沉积物的混合产物。相比之下，黄河沉积物的影响是相当有限的，只出现在底部的YSC-1孔。6.4ka以来长江陆源物质对南海环流贡献的减少可能与现代海洋环流型的形成有关。6.4 ka后，来自北方朝鲜半岛的大同江和清川河的较细沉积物在CYSM中占主导地位。海洋锋可能阻止了西（现代和古老的黄河）和东（朝鲜半岛南部的小河流）两侧的悬浮沉积物分散到黄海中部。因此，我们的研究结果突出了黄海全新世沉积物来源和扩散模式的高度复杂性。黄海沉积物的源汇历史还有待进一步研究。(C)2014爱思唯尔有限公司版权所有。
We present a provenance study of two cores (YSC-1 and YSC-4) from the Central Yellow Sea Mud (CYSM) to investigate the source and transport processes of clay minerals during the Holocene. Clay mineral assemblages of Cores YSC-1 and YSC-4 mainly consist of illite, followed by chlorite and kaolinite, and scarce smectite. Combined with other published data, it is found that the fine sediments in the CYSM are most likely a mixing product of the Changjiang and Korean Peninsula small rivers sediments. In contrast, the influence of Huanghe sediments is rather limited and only appears in the bottom part of Core YSC-1. Decreased contribution of terrigenous supply from the Changjiang to the CYSM since 6.4 ka may be related to the formation of modern ocean circulation pattern. After 6.4 ka, the finer sediments of Taedong and Chongchon Rivers from the northern Korean Peninsula are dominated in the CYSM. The oceanic fronts likely prevent both the suspended sediments of the west (modern and older Huanghe) and east (southern Korean Peninsula small rivers) sides from dispersing into the central Yellow Sea. Our results thus highlight the highly complex nature of sediment source and dispersal pattern in the Yellow Sea during the Holocene. More detailed studies are needed to better understand the sediment source-to-sink history of Yellow Sea. (C) 2014 Elsevier Ltd. All rights reserved.