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Pervasive Crustal Volcanic Mush in the Highly Stretched Sunda Plate Margin of Northern Sumatra

文献类型：期刊论文

作者Feng, Mingye1,2,3,4; Wei, Shengji2,3; Chen, Ling1,4; Muksin, Umar5; Lythgoe, Karen2,3; Wang, Tuo4; Wu, Zimu6
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2023-11-16
卷号50期号:21页码:11
ISSN号0094-8276
DOI10.1029/2023GL104391
英文摘要Arc volcanism, crustal deformation, and their interplay are poorly understood in northwestern Sumatra. Traditional receiver function H-kappa stacking studies constrain the variations in crustal thickness and Vp/Vs ratio in volcanic zones but rarely estimate the melt fractions. Here, we propose a H-phi stacking method, a variant of the H-kappa stacking method, and apply it to the dense nodal array data from Aceh, northern Sumatra, to estimate crustal thickness, Vp/Vs ratio, and melt fraction. Most results show considerably high Vp/Vs ratios (similar to 1.98) and melt fractions (up to 19%), indicating pervasive crustal magmatic mush. The northwestern edge of the Aceh crust is much thinner (similar to 22 km) than extended crust globally, reflecting a highly stretched crust due to tectonic processes governing the opening of the Andaman Sea. This thin crust and high melt fractions explain the Bouguer gravity anomaly, and partly explain the northward migration of Quaternary volcanics. Crustal thickness and melt fraction are important indicators of crustal magmatism and deformation. Situated between the Sumatran and Andaman subduction zones, Aceh, in northwestern Sumatra, is distinguished by strong crustal deformation, resulting in active crustal seismicity, and Quaternary volcanics that have migrated northward over time. However, the abnormal arc volcanism, crustal deformation, and their interplay, remain unclear because of poor understanding of the crustal structure. To fill this knowledge gap, we deployed 155 nodal seismic stations in Aceh for 18 months. In this work, we develop a new receiver function method that takes advantage of converted seismic energy from the base of the crust to constrain the crustal thickness and melt fraction beneath the stations in Aceh. We find that: (a) the average crustal melt fraction is as high as 19%, indicating a considerable volume of partially molten rock in the crust and (b) the crust in northern Aceh is as thin as similar to 22 km, suggesting high stretching of the crust associated with the opening of the Andaman Sea. The stretched crust with a high melt fraction partly explains the northward migration of Quaternary volcanics and active seismicity/crustal deformation, but the migration mechanism of other volcanics requires further investigation. A new receiver function method is developed to constrain crustal thickness and melt fractionApplications to dense nodal array data in northwestern Sumatra show a thin (similar to 22 km) crust and high crustal melt fraction (up to 19%)The new constraints partly explain abnormal volcanic migration and crustal stretching
WOS关键词RECEIVER-FUNCTION ; SEISMIC VELOCITIES ; CONTINENTAL-CRUST ; BENEATH ; CONSTRAINTS ; EARTHQUAKE ; STATIONS ; MELT ; EVOLUTION ; INVERSION
资助项目We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un[42288201] ; National Natural Science Foundation of China[MOE-MOET32021-0002] ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3
WOS研究方向Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:001095069800001
资助机构We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; We thank editor Christian Huber, reviewer Ayush Goyal, and another anonymous reviewer for their helpful comments. This research is jointly supported by the National Natural Science Foundation of China (42288201) and the Ministry of Education, Singapore, un ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3 ; Ministry of Education, Singapore, under its MOE Academic Research Fund Tier 3
源URL[http://ir.iggcas.ac.cn/handle/132A11/110678]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Wei, Shengji; Chen, Ling
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
2.Nanyang Technol Univ, Earth Observ Singapore, Singapore, Singapore
3.Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
5.Univ Syiah Kuala, Tsunami & Disaster Mitigat Res Ctr TDMRC, Banda Aceh, Indonesia
6.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China
推荐引用方式
GB/T 7714		 Feng, Mingye,Wei, Shengji,Chen, Ling,et al. Pervasive Crustal Volcanic Mush in the Highly Stretched Sunda Plate Margin of Northern Sumatra[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50(21):11.
APA Feng, Mingye.,Wei, Shengji.,Chen, Ling.,Muksin, Umar.,Lythgoe, Karen.,...&Wu, Zimu.(2023).Pervasive Crustal Volcanic Mush in the Highly Stretched Sunda Plate Margin of Northern Sumatra.GEOPHYSICAL RESEARCH LETTERS,50(21),11.
MLA Feng, Mingye,et al."Pervasive Crustal Volcanic Mush in the Highly Stretched Sunda Plate Margin of Northern Sumatra".GEOPHYSICAL RESEARCH LETTERS 50.21(2023):11.

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来源：地质与地球物理研究所

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