Neogene subsidence pattern in the multi-episodic extension systems: Insights from backstripping modelling of the Okinawa Trough
Neogene subsidence pattern in the multi-episodic extension systems: Insights from backstripping modelling of the Okinawa Trough
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多幕式伸展系统中的新近纪沉降模式：冲绳海槽回缩模型的见解
DOI：
10.1016/j.marpetgeo.2019.08.051
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发表时间：
2019-04
影响因子：
4.2
通讯作者：
Li Chunfeng
中科院分区：
文献类型：
--
作者：
Fang Penggao;Ding Weiwei;Lin Xiubin;Zhao Zhongxian;Fang Yinxia;Li Chunfeng
东南亚地区对弧后盆地的伸展系统已经有了广泛的认识和研究，但对活动弧后盆地伸展构造与构造沉降时空分布的相互作用却知之甚少。利用反剥离技术，首次分析了33条多道地震剖面，计算了整个冲绳海槽（OT）的新近系构造沉降。构造沉降重建表明，东段可大致分为4个不同速率的沉降阶段。通过对比强烈沉降区的时空分布，确认中新世至晚上新世期间，裂谷事件首先发生在北段（NOT）和中段（MOT），晚上新世之后，裂谷事件向南段（SOT）扩散。控制整个东第三纪快速构造沉降的因素可分为两类：1)ne - nne向正断层与东第三纪伸展有关，以及NW- nww向走滑断裂；即托卡拉断裂带和宫古断裂带，与菲律宾海板块俯冲到欧亚板块之下有关；2) SOT最南端出现的异常快速沉降可能与加瓜脊俯冲引起岩浆侵入导致部分熔融有关。我们认为，俯冲物质部分熔融产生的岩浆体侵入地壳，形成了致密的岩石圈，导致了这次快速的构造沉降。
Extensional systems of back-arc basins have been widely recognized and studied in SE Asia, however the interactions between extensional tectonics and spatial-temporal distributions of tectonic subsidence in an active back-arc basin are poorly known. Using a backstripping technique, we analysed 33 multichannel seismic profiles to calculate the Neogene tectonic subsidence across the entire Okinawa Trough (OT) for the first time. Reconstruction of the tectonic subsidence shows that the OT can be roughly divided into four subsidence stages with variable rate. By comparing the temporal-spatial distribution of the intensive subsidence area, we confirmed that rifting events first occurred in the northern segment (NOT) and middle segment (MOT) from the Miocene to Late Pliocene, and then propagated to the southern segment (SOT) after the Late Pliocene. The factors controlling the rapid tectonic subsidence over the entire OT can be classified into two categories: 1) NE-to NNE-trending normal faulting, related to extension of the OT, and NW- to NWW-trending strike-slip faulting; i.e., the Tokara Fault and the Miyako Fault, related to subduction of the Philippine Sea Plate under the Eurasian Plate; 2) The anomalous rapid subsidence occurred in the southernmost part of the SOT is likely related to the subducted Gagua Ridge which caused magma intrusion resulting from partial melting. We suggest that magmatic bodies produced by partial melting of subducted materials intruded into the crust and created a dense lithosphere, causing this rapid tectonic subsidence.
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影响因子：
2.9
作者：
Y. Okamura;A. Nishizawa;M. Oikawa;D. Horiuchi
通讯作者：
Y. Okamura;A. Nishizawa;M. Oikawa;D. Horiuchi
影响因子：
4.2
作者：
Shuchun Yang;Shengbiao Hu;Dongsheng Cai;X. Feng;Linlin Chen;Le Gao
通讯作者：
Shuchun Yang;Shengbiao Hu;Dongsheng Cai;X. Feng;Linlin Chen;Le Gao
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
东海陆架盆地与南海东北部新生代盆地的异同
影响因子：
1.8
作者：
Zang Y. B.;Li S. Z.;Guo L. L.;Suo Y. H.;Somerville I. D.;Zhao S. J.;Hui G. G.;Zhang Y.;Zheng Q. L.
通讯作者：
Zheng Q. L.
DOI：
10.1360/03yd0246
发表时间：
2005
期刊：
Science in China Series D: Earth Sciences
影响因子：
--
作者：
Yanpeng Zheng;Baohua Liu;Jinlong Wu;Ruicai Liang;Chenguang Liu;Zhengmin Zhang
通讯作者：
Yanpeng Zheng;Baohua Liu;Jinlong Wu;Ruicai Liang;Chenguang Liu;Zhengmin Zhang