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Seismic phases from the Moho and its implication on the ultra-slow spreading ridge
[Zhang Jiazheng; Zhao Minghui; Qiu Xuelin] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Li Jiabiao; Ruan Aiguo] State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China; [Zhang Jiazheng] Univ Acad Sci, Beijing 100049, Peoples R China; mhzhao@scsio.ac.cn
2013
发表期刊ACTA OCEANOLOGICA SINICA
ISSN0253-505X
卷号32期号:12页码:75-86
摘要The Moho interface provides critical evidence for crustal thickness and the mode of oceanic crust accretion. The seismic Moho interface has not been identified yet at the magma-rich segments (46 degrees-52 degrees E) of the ultra-slow spreading Southwestern Indian Ridge (SWIR). This paper firstly deduces the characteristics and domains of seismic phases based on a theoretical oceanic crust model. Then, topographic correction is carried out for the OBS record sections along Profile Y3Y4 using the latest OBS data acquired from the detailed 3D seismic survey at the SWIR in 2010. Seismic phases are identified and analyzed, especially for the reflected and refracted seismic phases from the Moho. A 2D crustal model is finally established using the ray tracing and travel-time simulation method. The presence of reflected seismic phases at Segment 28 shows that the crustal rocks have been separated from the mantle by cooling and the Moho interface has already formed at zero age. The 2D seismic velocity structure across the axis of Segment 28 indicates that detachment faults play a key role during the processes of asymmetric oceanic crust accretion.
部门归属海洋地质
关键词Moho Interface Seismic Phases Ultra-slow Spreading Ridge 2d Crustal Structure Southwestern Indian Ridge (Swir)
学科领域Oceanography
资助者Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01. ; Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01. ; Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01. ; Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01.
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语种英语
资助者Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01. ; Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01. ; Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01. ; Foundation item: The National Natural Science Foundation of China under contract Nos 41176053, 41076029, 91028002 and 41176046; Dayang 115 under contract No. DYXM-115-02-3-01.
WOS记录号WOS:000328528400010
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/11093
专题中科院边缘海地质重点实验室
通讯作者mhzhao@scsio.ac.cn
推荐引用方式
GB/T 7714
[Zhang Jiazheng,Zhao Minghui,Qiu Xuelin] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China,et al. Seismic phases from the Moho and its implication on the ultra-slow spreading ridge[J]. ACTA OCEANOLOGICA SINICA,2013,32(12):75-86.
APA [Zhang Jiazheng.,Zhao Minghui.,Qiu Xuelin] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.,[Li Jiabiao.,Ruan Aiguo] State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China.,...&mhzhao@scsio.ac.cn.(2013).Seismic phases from the Moho and its implication on the ultra-slow spreading ridge.ACTA OCEANOLOGICA SINICA,32(12),75-86.
MLA [Zhang Jiazheng,et al."Seismic phases from the Moho and its implication on the ultra-slow spreading ridge".ACTA OCEANOLOGICA SINICA 32.12(2013):75-86.
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