Gravity Flow on Slope and Abyssal Systems in the Qiongdongnan Basin, Northern South China Sea
Gravity Flow on Slope and Abyssal Systems in the Qiongdongnan Basin, Northern South China Sea
复制标题
南海北部琼东南盆地斜坡重力流及深渊系统
DOI：
10.1111/j.1755-6724.2011.00394.x
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发表时间：
2011-02
影响因子：
3.3
通讯作者：
C. M. Zhang
中科院分区：
文献类型：
--
作者：
M. Su, X. O. Xie, J. L. Li, T. Jiang, C. Zhang, Y.;C. M. Zhang
通过对新的地震资料的研究，可以从琼东南盆地内部结构和陆架和深海环境的分布来识别沉积物重力流。识别出6种重力流类型：(1)沿陆架边缘和斜坡具有截断基底和协调覆盖关系的浊积河道，包括横向移动和垂直堆积的河道复合体；(2)断裂陆架上具有勺形形态滑步的滑坡体，由低固结高含水率的沉积物变形而产生；(3)陆架斜坡上局限滑塌，由异常坡度或断裂活动触发；(4)浊积杂岩(TSC)属于盆底扇和斜坡扇成因，偶尔为深海沉积物提供浊流；(5)发生在下坡盆底、面积约400 km2的沉积波是在横穿海底的水流作用下产生的；(6)深水区的中央峡谷代表了一种由泥石流、浊流河道和TSC组合组成的特殊类型的重力流。它呈现出平面多段、垂直多相的特征。峡谷中伴生的浊积岩具有良好的物性，可作为QDNB的潜在勘探目标。
The study of new seismic data permits the identification of sediment gravity flows in terms of internal architecture and the distribution on shelf and abyssal setting in the Qiongdongnan Basin (QDNB). Six gravity flow types are recognized: (1) turbidite channels with a truncational basal and concordant overburden relationship along the shelf edge and slope, comprising laterally‐shifting and vertically‐aggrading channel complexes; (2) slides with a spoon‐shaped morphology slip steps on the shelf‐break and generated from the deformation of poorly‐consolidated and high water content sediments; (3) slumps are limited on the shelf slope, triggered either by an anomalous slope gradient or by fault activity; (4) turbidite sheet complexes (TSC) were ascribed to the basin‐floor fan and slope fan origin, occasionally feeding the deep marine deposits by turbidity currents; (5) sediment waves occurring in the lower slope‐basin floor, and covering an area of approximately 400 km2, were generated beneath currents flowing across the sea bed; and (6) the central canyon in the deep water area represents an exceptive type of gravity flow composed of an association of debris flow, turbidite channels, and TSC. It presents planar multisegment and vertical multiphase characteristics. Turbidite associated with good petrophysical property in the canyon could be treated as a potential exploration target in the QDNB.
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影响因子：
3.3
作者：
P. Dailly;P. Lowry;K. Goh;G. Monson
通讯作者：
P. Dailly;P. Lowry;K. Goh;G. Monson
影响因子：
3.5
作者：
D. Piper;B. Savoye
通讯作者：
D. Piper;B. Savoye
影响因子：
3.5
作者：
G. Shanmugam;R. Bloch;S. Mitchell;G. W. J. Beamish;R. Hodgkinson;J. Damuth;T. Straume;S. E. Syvertsen;K. Shields
通讯作者：
G. Shanmugam;R. Bloch;S. Mitchell;G. W. J. Beamish;R. Hodgkinson;J. Damuth;T. Straume;S. E. Syvertsen;K. Shields
影响因子：
2.9
作者：
J. Gardner;D. B. Prior;M. Field
通讯作者：
J. Gardner;D. B. Prior;M. Field
影响因子：
3.5
作者：
Percy P. H. Chen;Zhi Chen;Qi Zhang
通讯作者：
Percy P. H. Chen;Zhi Chen;Qi Zhang