Turbidite deposition in the southern South China Sea during the last glacial: Evidence from grain-size and major elements records
Turbidite deposition in the southern South China Sea during the last glacial: Evidence from grain-size and major elements records
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末次冰期南海南部浊积岩沉积：来自粒度和常量元素记录的证据
DOI：
10.1007/s11434-011-4685-7
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发表时间：
2011-08
影响因子：
--
通讯作者：
Xie, X.
中科院分区：
文献类型：
--
作者：
Zhao, Y.;Wu, Q.;Liu, Z.;Colin, C.;Xie, X.
对MD 05 -2895孔海相沉积物进行了高分辨率粒度和常量元素地球化学测量，以帮助了解浊积岩序列的形成。粒度结果表明，这些浊积岩沉积物比正常泥灰岩含有更多的粗沉积物颗粒。粗颗粒沉积物主要来自巽他陆架的残留沉积物。残留沉积物主要由石英、长石、火山灰和少量含钛或含铁重矿物组成。对应于这些矿物的浓度，在浊积岩层中观察到Si/Al、K/Al、Ti/Al和Fe/Al比增加。由于所有观察到的浊积岩序列沉积在末次冰期，这些浊流事件的发生是暗示密切相关的海平面引起的沉积物供应的不稳定性。我们认为，沉积物颗粒从一个单一的浊流通常是由重力和浮力之间的平衡控制，与个别颗粒的相互作用是次要的。
High-resolution grain size and major element geochemical measurements were performed on the marine sediments of Core MD05-2895 to help understand the formation of turbidite sequences. Grain-size results show that these turbidite sediments contain more coarse sediment grains than normal marls. The coarse sediment grains are mostly derived from relict sediments on the Sunda Shelf. Relict sediments are composed mainly of quartz, feldspar, tephra and a few titaniferous or ferruginous heavy minerals. Corresponding to the concentration of these minerals, increases in Si/Al, K/Al, Ti/Al and Fe/Al ratios are observed in the turbidite layers. As all the observed turbidite sequences were deposited during the last glacial, the occurrence of these turbidity events is implied to be closely related to instabilities in sea-level-induced sediment supply. We suggest that deposition of sediment particles from a single turbidity current is usually controlled by a counterbalance between gravity and buoyancy, with the interaction of individual grains being of minor importance.
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影响因子：
12.1
作者：
G. Shanmugam;R. J. Moiola
通讯作者：
G. Shanmugam;R. J. Moiola
影响因子：
4
作者：
W. Peltier
通讯作者：
W. Peltier
影响因子：
2.9
作者：
S. Steinke;T. Hanebuth;C. Vogt;K. Stattegger
通讯作者：
S. Steinke;T. Hanebuth;C. Vogt;K. Stattegger
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
M. Xi
通讯作者：
M. Xi
DOI：
10.2973/odp.proc.sr.155.208.1997
发表时间：
1997
期刊：
--
影响因子：
--
作者：
D. Piper;M. Deptuck
通讯作者：
D. Piper;M. Deptuck