DOI: 10.1007/s00531-013-0937-x
Scopus记录号: 2-s2.0-84893782080
论文题名: Geochemistry and paleotectonic setting of Ediacaran metabasites from the Ossa-Morena Zone (SW Iberia)
作者: Sánchez Lorda M.E. ; Sarrionandia F. ; Ábalos B. ; Carrracedo M. ; Eguíluz L. ; Gil Ibarguchi J.I.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 5 起始页码: 1263
结束页码: 1286
语种: 英语
英文关键词: Amphibolites
; Cadomian
; Geochemistry
; Iberian Massif
; Island arc
; Ossa-Morena Zone
; Serie Negra
Scopus关键词: amphibolite
; Cadomian orogeny
; calc alkaline rock
; convergent margin
; Ediacaran
; geochemistry
; geodynamics
; island arc
; metabasite
; mid-ocean ridge basalt
; neodymium isotope
; subduction zone
; tectonic setting
; trace element
; Iberian Massif
; Ossa Morena Zone
英文摘要: New results on the geochemistry of Neoproterozoic (late Ediacaran) metabasites of the Ossa-Morena Zone (OMZ, Iberian Massif) are presented. The metabasite suite exhibits N- and E-MORB signatures, as well as volcanic arc signatures. The three amphibolite groups are discerned on the basis of major and trace element contents, and the Nd isotope relations help unravel the existence of a diverse magmatism during late Ediacaran times across the OMZ. N-MORB "Serie Negra" metabasites are distributed in the southern and, mostly, the central OMZ (Monesterio antiform). Calc-alkaline metabasites are exclusively constrained to the Coimbra-Córdoba sector of the northern OMZ. Finally, E-MORB-type metabasites are widespread across the entire OMZ. In present-day active geodynamic settings, such magma types are typical of younger island arcs, notably of forearc zones that are affected by extension soon after the initiation of subduction. The new geochemical data permit us to postulate a petrological zonation congruent with a N-dipping subduction zone located to the S of the current OMZ during the late Ediacaran. We argue that the metabasite host units represent (continental) shallow-crustal forearc segments of a convergent margin. The volcanic arc edifice would have developed during the latest Ediacaran to early Cambrian times and has been preserved, often without major orogenic reworking, in the central and northern OMZ. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893782080&doi=10.1007%2fs00531-013-0937-x&partnerID=40&md5=7c1fc4ac6351c6ff42b4989c14695001
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70397
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Departamento de Mineralogía y Petrología, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV)/EHU, P.O. Box 644, 48080 Bilbao, Spain; Departamento de Geodinámica, Facultad de Farmacia, Universidad del País Vasco (UPV)/EHU, 01006 Vitoria, Spain; Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV)/EHU, P.O. Box 644, 48080 Bilbao, Spain
Recommended Citation:
Sánchez Lorda M.E.,Sarrionandia F.,Ábalos B.,et al. Geochemistry and paleotectonic setting of Ediacaran metabasites from the Ossa-Morena Zone (SW Iberia)[J]. International Journal of Earth Sciences,2014-01-01,103(5)