DOI: 10.1016/j.tecto.2021.229009
论文题名: Longest and still longer: The Messejana-Plasencia dyke and its links with later Alpine deformation belt in Iberia
作者: de Vicente G. ; Olaiz A. ; Muñoz-Martín A. ; Cunha P.P.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 815 语种: 英语
中文关键词: Alpine reactivation
; Dolerite dyke
; Fault-sedimentation relationships
; Left-lateral strike slip deformation belt
; Messejana-Plasencia fault
英文关键词: Deformation
; Offshore oil well production
; Strike-slip faults
; Alpine Faults
; Central systems
; Mainland Portugal
; Middle Miocene
; Pyrenean orogen
; Simple structures
; Strain partitioning
; Strike-slip deformation
; Fault slips
; Cenozoic
; deformation
; diabase
; dike
; gravimetry
; Miocene
; Moho
; Oligocene
; strike-slip fault
; tectonostratigraphy
; Iberian Peninsula
英文摘要: The Messejana-Plasencia dyke (End-Triassic), NE-SW oriented, is the longest simple structure in Iberia (~500 km) and constitutes a first-order rheological discontinuity that crosses the entire crust. During the Alpine deformation, this discontinuity nucleated the Messejana-Plasencia left-lateral strike-slip fault and its related strike-slip deformation belt, consisting of a series of wide coalescent stepovers and small basins developed on the footwalls. Both structures can be followed from offshore of SW mainland Portugal to the central sector of the Spanish-Portuguese Central System. Using tectonic, geophysical, magnetic, and gravimetric analyses, our study demonstrated that it extends NE more than ~100 km below the continental sediments of the Duero Cenozoic Basin, until the Iberian Chain. We used a tectonostratigraphic analysis to determine the age of the wrench fault movement and that of the Spanish-Portuguese thrusts. In this range, the largest displacement during the Cenozoic occurred in the southern thrust of the Spanish sector of the Central System over the Madrid Cenozoic Basin, and NE-SW trending. This thrust displaces the Moho more than 10 km and probably joins the Messejana-Plasencia strike-slip fault at depth. The deduced age movement for both is Oligocene-Lower-Middle Miocene, related to the intraplate stresses transmitted from the Pyrenean orogen towards its foreland. A strain partitioning process was then deduced for the simultaneous movement of both main Alpine faults in Central Iberia. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170795
Appears in Collections: 气候变化与战略
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作者单位: GEODESPAL Department, Faculty of Geology, Complutense University, Spain Institute of Geosciences, IGEO, CSIC-UCM, Madrid, Spain; Repsol Exploration S. A. Madrid, Madrid, Spain; University of Coimbra, MARE - Marine and Environmental Sciences Centre, Department of Earth Sciences, Rua Sílvio Lima, Univ. Coimbra - Pólo II, Coimbra, 3030-790, Portugal
Recommended Citation:
de Vicente G.,Olaiz A.,Muñoz-Martín A.,et al. Longest and still longer: The Messejana-Plasencia dyke and its links with later Alpine deformation belt in Iberia[J]. Tectonophysics,2021-01-01,815