DOI: 10.1016/j.tecto.2020.228557
论文题名: Cenozoic increase in subduction erosion during plate convergence variability along the convergent margin off Trujillo, Peru
作者: Herbozo G. ; Kukowski N. ; Clift P.D. ; Pecher I. ; Bolaños R.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 790 语种: 英语
中文关键词: Andean orogeny
; Central Peruvian convergent margin
; Forearc subsidence
; Major plate reorganization events
; South America
; Subduction erosion
; Trujillo Basin
英文关键词: Plates (structural components)
; Process control
; Tectonics
; Geological process
; Multi-channel seismic
; Plate convergence
; Primary mechanism
; Spatio-temporal variation
; Structural deformation
; Subduction erosion
; Tectonic evolution
; Erosion
; Cenozoic
; convergent margin
; deformation
; plate convergence
; structural geology
; subduction
; tectonic setting
; Pacific Ocean
; Trujillo Basin
英文摘要: Subduction erosion is a long-term, large-scale geological process that dominates the structural inventory of a large number of convergent margins. Along the Peruvian convergent margin, this process has controlled the structural deformation of the forearc as a consequence of spatio-temporal variations during the Cenozoic. However, the pace at which tectonic erosion occurred has not been linked to regional, subduction-related events. The aim of this study is to show that subduction erosion along the Central Peruvian convergent margin off Trujillo (7∘S–9∘S) was influenced by plate convergence variability since the Late Cretaceous. Drilling data, multi-channel seismic (MCS) data and subsidence analyses are used to investigate the long-term effect of subduction erosion on the tectonic evolution of the Peru margin. Our study shows that subduction erosion (1) did not occur between the Cretaceous and Early Eocene (110–56 Ma), (2) increased and fluctuated between the Eocene and Pliocene (56–5 Ma) with a maximum average trench retreat of 3 km.Myr−1 between the Middle Miocene and Late Miocene (20–5 Ma), and (3) has decreased since the Pliocene (5 Ma) (1 km.Myr−1 of average trench retreat). A remarkable finding is that shorter periods of faster subduction erosion coincide with or follow major plate reorganization events that were marked by changes in the velocity and direction of relative plate convergence as well as with well-known phases of Andean orogeny. Based on our analyses, we therefore conclude that convergence variability off Peru is a primary mechanism controlling the pace at which tectonic erosion occurred along the Trujillo Basin during the Cenozoic. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170601
Appears in Collections: 气候变化与战略
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作者单位: Dirección de Hidrografía y Navegación (DIHIDRONAV), Marina de Guerra del Perú, Calle Roca 118, Chucuito, Callao, Peru; Institut für Geowissenschaften (IGW), Friedrich-Schiller-Universität (FSU) Jena, Burgweg 11, Jena, 07749, Germany; Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, United States; School of Environment, University of Auckland, Private Bag 92091, Auckland, 1142, New Zealand; PeruPetro, Luis Aldana 320, San Borja, Lima, Peru; Centro de Investigaciones para la Industria (Ceindust), Juan Balcázar 120, San Miguel, Lima, Peru
Recommended Citation:
Herbozo G.,Kukowski N.,Clift P.D.,et al. Cenozoic increase in subduction erosion during plate convergence variability along the convergent margin off Trujillo, Peru[J]. Tectonophysics,2020-01-01,790