Modern sediment characteristics and accumulation rates from the delta front to prodelta of the Yellow River (Huanghe)
Modern sediment characteristics and accumulation rates from the delta front to prodelta of the Yellow River (Huanghe)
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黄河三角洲前缘至前三角洲现代沉积物特征及堆积速率
DOI：
10.1007/s00367-016-0442-x
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发表时间：
2016-02
影响因子：
2.1
通讯作者：
Pei Shaofeng
中科院分区：
文献类型：
--
作者：
Zhou Liangyong;Liu Jian;Yoshiki Saito;Gao Maosheng;Diao Shaobo;Qiu Ji;ong;Pei Shaofeng
自1976年以来，黄河主河道一直处于三角洲复合体的东侧，黄河在渤海莱州湾形成了一个广阔的新三角洲瓣。2012年，进行了广泛的测深和高分辨率地震剖面测量，并在新的三角洲瓣外收集了沉积物岩心。本研究通过分析沉积物放射性核素（137 Cs、210 Pb和7 Be）、沉积结构、粒度组成、有机碳含量和1976 - 2012年期间的形态变化，研究了沿着现代黄河水下三角洲至莱州湾的三角洲沉积和形态。在水深剖面的变化，纵向河流的过程中，揭示了水下三角洲沉积在此期间。根据岩性和放射性核素分布确定了新三角洲叶沉积物和旧海底沉积物（1976年航向偏移之前）之间的浅底边界，并将其确认为地震记录中的下超面。新的三角洲叶瓣沉积物的堆积速率在三角洲前缘为5 ~ 18.6cm·a-1，在坡脚为2cm·a-1，在莱州湾陆架区为1- 2cm·a-1。沉积相也发生了变化，从近端区域的灰色和棕色沉积物到远端区域的灰色生物扰动细沉积物的交替。根据7 Be的分布，短期沉积速率至少为20 cm a-1在三角洲前缘。
Since 1976, the main channel of the Yellow River (Huanghe) has been on the east side of the delta complex, and the river has prograded a broad new delta lobe in Laizhou Bay of the Bohai Sea. In 2012, extensive bathymetric and high-resolution seismic profiles were conducted and sediment cores were collected off the new delta lobe. This study examined delta sedimentation and morphology along a profile across the modern subaqueous Yellow River delta and into Laizhou Bay, by analyzing sediment radionuclides (137Cs,210Pb and7Be), sedimentary structure, grain-size composition, organic carbon content, and morphological changes between 1976 and 2012. The change in the bathymetric profile, longitudinal to the river’s course, reveals subaqueous delta progradation during this period. The subbottom boundary between the new delta lobe sediment and the older seafloor sediment (before the 1976 course shift) was identified in terms of lithology and radionuclide distributions, and recognized as a downlap surface in the seismic record. The accumulation rate of the new delta lobe sediment is estimated to be 5–18.6 cm year–1on the delta front slope, 2 cm year–1at the toe of the slope, and 1–2 cm year–1in the shelf areas of Laizhou Bay. Sediment facies also change offshore, from alternations of gray and brown sediment in the proximal area to gray bioturbated fine sediment in the distal area. Based on7Be distribution, the shorter-term deposition rate was at least 20 cm year–1in the delta front.
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影响因子：
2.3
作者：
R. Wheatcroft;A. Stevens;L. M. Hunt;T. Milligan
通讯作者：
R. Wheatcroft;A. Stevens;L. M. Hunt;T. Milligan
DOI：
10.1016/s0278-4343(98)00090-9
发表时间：
1999-03
期刊：
--
影响因子：
--
作者：
C. Sommerfield;C. Nittrouer;C. Alexander
通讯作者：
C. Sommerfield;C. Nittrouer;C. Alexander
影响因子：
9.6
作者：
W. Qi;C. Lihua;Yang Zuo-sheng;Shen Wei-Quan;G.K.Kelier;D.B.Prior
通讯作者：
W. Qi;C. Lihua;Yang Zuo-sheng;Shen Wei-Quan;G.K.Kelier;D.B.Prior
现代黄河三角洲的沉积记录及其对近200年三角洲河道变化的响应
影响因子：
3
作者：
Xiao Wu;Naishuang Bi;Yutaka Kanai;Yoshiki Saito;Yong Zhang;Zuosheng Yang;Dejiang Fan;Houjie Wang
通讯作者：
Houjie Wang
影响因子：
2.9
作者：
C. Su;C. Huh
通讯作者：
C. Su;C. Huh