Controls of subducting slab dip and age on the extensional versus compressional deformation in the overriding plate

Ritabrata Dasgupta; Nibir Mandal; Changyeol Lee

doi:10.1016/j.tecto.2020.228716

Controls of subducting slab dip and age on the extensional versus compressional deformation in the overriding plate

Ritabrata Dasgupta, Nibir Mandal, Changyeol Lee

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Oceanic plate subduction can exert extensional, compressional or both types of deformations simultaneously in overriding plates. In this study, we explore the factors controlling these two competing modes of deformation in response to contrasting stress fields. Two-dimensional computational fluid dynamics models are presented to show that the dip and age of subducting slabs are crucial parameters to modulate the extensional versus compressional deformations. Shallow-dipping (< 30°) and/or young (< 60 Myr) subducting slabs favor compressional tectonics to form an orogenic wedge (accretionary type), whereas steeply dipping (> 45°) and/or old (> 60 Myr) slabs facilitate extensional tectonics, expressed as a back-arc basin (non-accretionary type). We validate the parametric analysis by comparing our model results with the observed modes of overriding plate deformation in natural subduction zones.

Original language	English
Article number	228716
Journal	Tectonophysics
Volume	801
DOIs	https://doi.org/10.1016/j.tecto.2020.228716
Publication status	Published - 2021 Feb 20

Bibliographical note

Funding Information:
We thank Dr. Arthur Bauville, two anonymous reviewers and Editor Dr. Kelin Wang – for their insightful comments and suggestions at various stages to improve the present study. We thank Dr. Collin J. Grant, Shell, UK for his help in improving the English language of our manuscript. This work is a part of RD's doctoral thesis. RD gratefully acknowledges the University Grants Commission, India, for providing a fellowship. NM thanks the SERB, Department of Science and Technology, India, for the J. C. Bose Fellowship. CL is supported by the National Research Foundation of Korea (Grant: 2017R1A6A1A07015374 and 2019R1A2C1002517 ) and Yonsei University Research Fund of 2019-22-0010 . All the data are available from the corresponding author upon request.

Publisher Copyright:
© 2020 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Geophysics
Earth-Surface Processes

Access to Document

10.1016/j.tecto.2020.228716

Cite this

@article{99dbe8e0aff24501ba783e54bc6bb996,

title = "Controls of subducting slab dip and age on the extensional versus compressional deformation in the overriding plate",

abstract = "Oceanic plate subduction can exert extensional, compressional or both types of deformations simultaneously in overriding plates. In this study, we explore the factors controlling these two competing modes of deformation in response to contrasting stress fields. Two-dimensional computational fluid dynamics models are presented to show that the dip and age of subducting slabs are crucial parameters to modulate the extensional versus compressional deformations. Shallow-dipping (< 30°) and/or young (< 60 Myr) subducting slabs favor compressional tectonics to form an orogenic wedge (accretionary type), whereas steeply dipping (> 45°) and/or old (> 60 Myr) slabs facilitate extensional tectonics, expressed as a back-arc basin (non-accretionary type). We validate the parametric analysis by comparing our model results with the observed modes of overriding plate deformation in natural subduction zones.",

author = "Ritabrata Dasgupta and Nibir Mandal and Changyeol Lee",

note = "Funding Information: We thank Dr. Arthur Bauville, two anonymous reviewers and Editor Dr. Kelin Wang – for their insightful comments and suggestions at various stages to improve the present study. We thank Dr. Collin J. Grant, Shell, UK for his help in improving the English language of our manuscript. This work is a part of RD's doctoral thesis. RD gratefully acknowledges the University Grants Commission, India, for providing a fellowship. NM thanks the SERB, Department of Science and Technology, India, for the J. C. Bose Fellowship. CL is supported by the National Research Foundation of Korea (Grant: 2017R1A6A1A07015374 and 2019R1A2C1002517 ) and Yonsei University Research Fund of 2019-22-0010 . All the data are available from the corresponding author upon request. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

month = feb,

day = "20",

doi = "10.1016/j.tecto.2020.228716",

language = "English",

volume = "801",

journal = "Tectonophysics",

issn = "0040-1951",

publisher = "Elsevier",

}

TY - JOUR

T1 - Controls of subducting slab dip and age on the extensional versus compressional deformation in the overriding plate

AU - Dasgupta, Ritabrata

AU - Mandal, Nibir

AU - Lee, Changyeol

N1 - Funding Information: We thank Dr. Arthur Bauville, two anonymous reviewers and Editor Dr. Kelin Wang – for their insightful comments and suggestions at various stages to improve the present study. We thank Dr. Collin J. Grant, Shell, UK for his help in improving the English language of our manuscript. This work is a part of RD's doctoral thesis. RD gratefully acknowledges the University Grants Commission, India, for providing a fellowship. NM thanks the SERB, Department of Science and Technology, India, for the J. C. Bose Fellowship. CL is supported by the National Research Foundation of Korea (Grant: 2017R1A6A1A07015374 and 2019R1A2C1002517 ) and Yonsei University Research Fund of 2019-22-0010 . All the data are available from the corresponding author upon request. Publisher Copyright: © 2020 Elsevier B.V.

PY - 2021/2/20

Y1 - 2021/2/20

N2 - Oceanic plate subduction can exert extensional, compressional or both types of deformations simultaneously in overriding plates. In this study, we explore the factors controlling these two competing modes of deformation in response to contrasting stress fields. Two-dimensional computational fluid dynamics models are presented to show that the dip and age of subducting slabs are crucial parameters to modulate the extensional versus compressional deformations. Shallow-dipping (< 30°) and/or young (< 60 Myr) subducting slabs favor compressional tectonics to form an orogenic wedge (accretionary type), whereas steeply dipping (> 45°) and/or old (> 60 Myr) slabs facilitate extensional tectonics, expressed as a back-arc basin (non-accretionary type). We validate the parametric analysis by comparing our model results with the observed modes of overriding plate deformation in natural subduction zones.

AB - Oceanic plate subduction can exert extensional, compressional or both types of deformations simultaneously in overriding plates. In this study, we explore the factors controlling these two competing modes of deformation in response to contrasting stress fields. Two-dimensional computational fluid dynamics models are presented to show that the dip and age of subducting slabs are crucial parameters to modulate the extensional versus compressional deformations. Shallow-dipping (< 30°) and/or young (< 60 Myr) subducting slabs favor compressional tectonics to form an orogenic wedge (accretionary type), whereas steeply dipping (> 45°) and/or old (> 60 Myr) slabs facilitate extensional tectonics, expressed as a back-arc basin (non-accretionary type). We validate the parametric analysis by comparing our model results with the observed modes of overriding plate deformation in natural subduction zones.

UR - http://www.scopus.com/inward/record.url?scp=85099319426&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85099319426&partnerID=8YFLogxK

U2 - 10.1016/j.tecto.2020.228716

DO - 10.1016/j.tecto.2020.228716

M3 - Article

AN - SCOPUS:85099319426

SN - 0040-1951

VL - 801

JO - Tectonophysics

JF - Tectonophysics

M1 - 228716

ER -

Controls of subducting slab dip and age on the extensional versus compressional deformation in the overriding plate

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this