Detachment-controlled Subsidence Pattern at Hyper-extended Passive Margin: Insights from Backstripping Modelling of the Baiyun Rift, northern South China Sea
Detachment-controlled Subsidence Pattern at Hyper-extended Passive Margin: Insights from Backstripping Modelling of the Baiyun Rift, northern South China Sea
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超延伸被动边缘的脱离控制沉降模式：南海北部白云裂谷反剥离模型的见解
DOI：
10.1016/j.gr.2021.12.012
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发表时间：
2022-01
影响因子：
6.1
通讯作者：
Zhongxian Zhao
中科院分区：
文献类型：
--
作者：
Penggao Fang;Weiwei Ding;Yanghui Zhao;Xiubin Lin;Zhongxian Zhao
滑脱断层如何控制超伸展被动边缘的盆地沉陷仍是个谜。在对29条高分辨率多道地震剖面进行详细地质解释和反剥离的基础上，计算了白云裂谷盆地尺度的构造沉降量，研究了构造沉降量与滑脱断裂的关系。结果表明，滑脱断裂作用是控制同裂谷沉陷的主要因素。白云断陷东部始新世早期至晚始新世为衰减型沉降速率，与强烈的脆性伸展形成鲜明对比。我们将其归因于超伸展过程中涉及同裂谷岩浆活动的拆离断层下盘的隆起。而在白云裂谷西部，由于始新世晚期挠曲载荷的响应，其平均下沉速率比东部高出4500m/−以上。在裂谷后阶段，白云裂谷东部的下沉速率呈现类似的向洋递增趋势，并在中新世中期出现异常的快速下沉事件，这可归因于同裂谷拆离断裂作用导致的岩浆辅助的岩石圈弱化流变条件。我们认为，这种沉降模式与拆离断层作用之间的关系对其他发育拆离构造和岩浆穹隆构造的超伸展裂谷系统具有全球适用性。
How detachment fault controls the basin subsidence at hyper-extended passive margin remains mysterious. Based on a detailed geological interpretation and backstripping on 29 high-resolution multi-channel seismic profiles, we calculate the basin-scale tectonic subsidence across the Baiyun Rift to study the relationship between tectonic subsidence and detachment faulting. Our results confirm that detachment faulting is the primary factor controlling thesyn-rift subsidence. A decaying subsidence rate, or deficit subsidence is observed in the eastern Baiyun Rift from the early to late Eocene, which is in marked contrast to the intensive brittle stretching. We attribute this to the doming of the detachment fault footwall involving thesyn-rift magmatism during its hyper-extension process. While in the western Baiyun Rift the average subsidence rate is over 45 m Myr−1higher than that in the eastern as the response of flexural loading in the late Eocene. During the post-rift stage, the subsidence rate shows a similar oceanward increasing trend, and an anomalous rapid subsidence event during the middle Miocene in the eastern Baiyun Rift, which can be ascribed to the magma-assisted weakened rheological condition of the lithosphere deriving from thesyn-rift detachment faulting. We propose that this relationship between subsidence pattern and detachment faulting has global applicability for other hyper-extended rift systems developing detachments and magmatic-related dome structures.
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影响因子：
2.9
作者：
Zhichao Zhou;L. Mei;Jun Liu;Jinyun Zheng;Liang Chen;Shihao Hao
通讯作者：
Zhichao Zhou;L. Mei;Jun Liu;Jinyun Zheng;Liang Chen;Shihao Hao
DOI：
10.2973/odp.proc.ir.184.101.2000
发表时间：
2000-06
期刊：
--
影响因子：
--
作者：
Pinxian Wang;W. Prell;P. Blum
通讯作者：
Pinxian Wang;W. Prell;P. Blum
富含沉积物边缘的同裂谷岩浆特征和演化：来自南海高分辨率地震数据的见解
影响因子：
6.1
作者：
Zhang Cuimei;Sun Zhen;Manatschal Gianreto;Pang Xiong;Qiu Ning;Su Ming;Zheng Jinyun;Li Hongbo;Gu Yale;Zhang Jiangyang;Zhao Yanghui
通讯作者：
Zhao Yanghui
马尼拉海沟俯冲海山的地球动力学效应：数值模拟的见解
影响因子：
2.9
作者：
Cheng Zihua;Ding Weiwei;Faccenda Manuele;Li Jiabiao;Lin Xiubin;Ma Letian;Fang Penggao;Ding Hanghang
通讯作者：
Ding Hanghang
影响因子：
2.5
作者：
J. Saleeby;Z. Saleeby;L. Pourhiet
通讯作者：
J. Saleeby;Z. Saleeby;L. Pourhiet