Flat slab deformation caused by interplate suction force

被引:14
|
作者
Ma, Yiran [1 ]
Clayton, Robert W. [1 ]
机构
[1] CALTECH, Seismol Lab, Pasadena, CA 91125 USA
关键词
NORMAL SUBDUCTION; MANTLE STRUCTURE; SOUTHERN PERU; AMBIENT NOISE; NAZCA; BENEATH; CRUST; ALTIPLANO; FLOW; CONSTRAINTS;
D O I
10.1002/2015GL065195
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We image the structure at the southern end of the Peruvian flat subduction zone, using receiver function and surface wave methods. The Nazca slab subducts to similar to 100 km depth and then remains flat for similar to 300 km distance before it resumes the dipping subduction. The flat slab closely follows the topography of the continental Moho above, indicating a strong suction force between the slab and the overriding plate. A high-velocity mantle wedge exists above the initial half of the flat slab, and the velocity resumes to normal values before the slab steepens again, indicating the resumption of dehydration and ecologitization. Two prominent midcrust structures are revealed in the 70 km thick crust under the Central Andes: molten rocks beneath the Western Cordillera and the underthrusting Brazilian Shield beneath the Eastern Cordillera.
引用
收藏
页码:7064 / 7072
页数:9
相关论文
共 50 条
  • [31] Compartment syndrome caused by suction
    Cosker, T
    Gupta, S
    Tayton, K
    INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED, 2004, 35 (11): : 1194 - +
  • [32] Interplate coupling and deformation in the accretionary prism in the Southwest Japan subduction zone
    Furukawa, Y
    GEOPHYSICAL RESEARCH LETTERS, 1999, 26 (20) : 3145 - 3148
  • [33] Slab segmentation controls the interplate slip motion in the SW Hellenic subduction: New insight from the 2008 Mw6.8 Methoni interplate earthquake
    Sachpazi, M.
    Laigle, M.
    Charalampakis, M.
    Sakellariou, D.
    Flueh, E.
    Sokos, E.
    Daskalaki, E.
    Galve, A.
    Petrou, P.
    Hirn, A.
    GEOPHYSICAL RESEARCH LETTERS, 2016, 43 (18) : 9619 - 9626
  • [34] Force-Deformation Study on Glass Fiber Reinforced Concrete Slab Incorporating Waste Paper
    Praburanganathan, S.
    Sudharsan, N.
    Reddy, Yeddula Bharath Simha
    Reddy, Chukka Naga Dheeraj Kumar
    Natrayan, L.
    Paramasivam, Prabhu
    ADVANCES IN CIVIL ENGINEERING, 2022, 2022
  • [35] NOTE ON CALCULATION OF SUCTION FORCE
    SIEKMANN, J
    SIAM REVIEW, 1965, 7 (03) : 349 - &
  • [36] Alternatives to Enhance Flat Slab Ductility
    Husain, Mohamed
    Eisa, Ahmed S.
    Roshdy, Ramy
    INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS, 2017, 11 (01) : 161 - 169
  • [37] Scraped by flat-slab subduction
    Marc-André Gutscher
    Nature Geoscience, 2018, 11 : 890 - 891
  • [38] Alternatives to Enhance Flat Slab Ductility
    Mohamed Husain
    Ahmed S. Eisa
    Ramy Roshdy
    International Journal of Concrete Structures and Materials, 2017, 11 : 161 - 169
  • [39] Measurement of Suction Stress and Soil Deformation at High Suction Range
    Dong, Yi
    Lu, Ning
    GEOTECHNICAL TESTING JOURNAL, 2021, 44 (02): : 308 - 322
  • [40] Geometric controls on flat slab seismicity
    Sandiford, Dan
    Moresi, Louis
    Sandiford, Mike
    Yang, Ting
    EARTH AND PLANETARY SCIENCE LETTERS, 2019, 527