DOI: 10.1016/j.epsl.2020.116480
论文题名: The structure of Mediterranean arcs: New insights from the Calabrian Arc subduction system
作者: Prada M. ; Ranero C.R. ; Sallares V. ; Grevemeyer I. ; de Franco R. ; Gervasi A. ; Zitellini N.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 548 语种: 英语
中文关键词: Alpine orogeny
; Calabrian Arc, subduction
; mantle exhumation
; Mediterranean active arcs
; travel-time tomography
; wide-angle seismic data
英文关键词: Gasoline
; Petrology
; Seismic waves
; Wave propagation
; Complex structure
; Mediterranean mountains
; Mountain belts
; Orogenic belts
; P-wave velocity
; Seismic methods
; Structuration
; Temporal and spatial changes
; Seismology
; Alpine orogeny
; Calabrian
; exhumation
; geological mapping
; lithospheric structure
; seismic data
; seismic method
; slab
; subduction
; Calabrian Arc
英文摘要: The formation of Cenozoic mountain belts in the Mediterranean realm was preceded by tens of millions of years of subduction, forming volcanic arcs, and frontal contractional systems. In addition, subduction usually involves slab rollback and formation of oceanic backarcs. Although such structure must have influenced the orogeny of Mediterranean mountain belts, no active analog has been mapped with modern crustal-scale seismic methods. Here, we study the entire Calabrian subduction system to map the structure resulting from Tethys lithosphere subduction and slab rollback, in a process that must be akin to that operating during a phase of the formation of the Mediterranean orogenic belts. We present a crustal-scale cross section of the entire Calabrian subduction system obtained from on- and off-shore wide-angle seismic data. The 2D P-wave velocity section shows spatially abrupt (<5 km of profile distance) structural and petrological transitions from the Ionian sedimentary wedge and Calabrian arc, to the rifted NW Calabrian margin, where the Quaternary Aeolian arc is emplaced. The margin, then, transitions northwards into the Marsili backarc region, where exhumed mantle and localized volcanism occurred during its formation. This complex structure implies rapid temporal and spatial changes between magmatic and amagmatic processes, and between compressional and extensional regimes during the evolution of this subduction system. We find that some terranes involved in the Alpine orogeny share petrological and tectonic similarities with some domains of the Calabrian subduction system. Based on the results of this study we propose the Calabrian Arc system as an analog for the subduction structuration that preceded the formation of Alpine orogenic systems. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165216
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Barcelona-CSI, Inst. de Ciències del Mar-CSIC, Barcelona, Spain; Barcelona-CSI, Inst. de Ciències del Mar, ICREA at CSIC, Barcelona, Spain; GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany; Istituto di Geologia Ambientale e Geoingegneria IGAG-CNR, Milano, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, sede di Rende, Italy; Dipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Rende, Italy; Istituto Scienze Marine ISMAR-CNR, Bologna, Italy
Recommended Citation:
Prada M.,Ranero C.R.,Sallares V.,et al. The structure of Mediterranean arcs: New insights from the Calabrian Arc subduction system[J]. Earth and Planetary Science Letters,2020-01-01,548