气候变化领域集成服务门户(CCPortal): Cenozoic increase in subduction erosion during plate convergence variability along the convergent margin off Trujillo, Peru

CCPortal

DOI	10.1016/j.tecto.2020.228557
	Cenozoic increase in subduction erosion during plate convergence variability along the convergent margin off Trujillo, Peru
	Herbozo G.; Kukowski N.; Clift P.D.; Pecher I.; Bolaños R.
发表日期	2020
ISSN	00401951
卷号	790
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.
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
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207768
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
推荐引用方式 GB/T 7714	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],2020,790.
APA	Herbozo G.,Kukowski N.,Clift P.D.,Pecher I.,&Bolaños R..(2020).Cenozoic increase in subduction erosion during plate convergence variability along the convergent margin off Trujillo, Peru.Tectonophysics,790.
MLA	Herbozo G.,et al."Cenozoic increase in subduction erosion during plate convergence variability along the convergent margin off Trujillo, Peru".Tectonophysics 790(2020).