globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-014-1024-7
Scopus记录号: 2-s2.0-84902544237
论文题名:
Geochemistry of the Peramora Mélange and Pulo do Lobo schist: Geochemical investigation and tectonic interpretation of mafic mélange in the Pangean suture zone, Southern Iberia
作者: Dahn D.R.L.; Braid J.A.; Murphy J.B.; Quesada C.; Dupuis N.; McFarlane C.R.M.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期:5
起始页码: 1415
结束页码: 1431
语种: 英语
英文关键词: Geochemistry ; Geochronology ; Melange ; Pangea ; Pulo do Lobo ; Tectonics ; Variscan
Scopus关键词: continental collision ; geochemistry ; geochronology ; geological mapping ; Gondwana ; Hercynian orogeny ; isotopic composition ; melange ; metasedimentary rock ; mid-ocean ridge basalt ; schist ; suture zone ; tectonic setting ; Iberian Peninsula
英文摘要: The Peramora Mélange is part of an accretionary complex between the South Portuguese Zone (a fragment of Laurussia) and the Ossa Morena Zone (para-autochthonous Gondwana) and is an expression of the Pangean suture zone in southwestern Iberia. The suture zone is characterized by fault-bounded units of metasedimentary rocks, mélanges, and mafic complexes. Detailed geologic mapping of the Peramora Mélange reveals a complex pattern of imbricated schists and mafic block-in-matrix mélanges. Geochemical signatures of the Pulo do Lobo schist (PDL) are consistent with derivation from both mafic and continental sources. The mafic block-in-matrix mélange displays normal mid-ocean ridge basalt (NMORB) geochemical signature, juvenile Sm-Nd isotopic compositions, and a range of zircon ages similar to those observed in the PDL, suggesting a sedimentary component. Taken together, these data suggest a complex tectonic history characterized by erosion of a NMORB source, mélange formation, and imbrication during underplating occurring during the final stages of continent-continent collision. © 2014 Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902544237&doi=10.1007%2fs00531-014-1024-7&partnerID=40&md5=2933b44dadefbd224f783497c38b956f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70401
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: Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS, B2G 2W5, Canada; Instituto Geológico y Minero de España (IGME), c/Ríos Rosas 23, 28003 Madrid, Spain; Department of Earth Sciences, University of New Brunswick, PO Box 4400, Fredericton, NB, E3B 5A3, Canada

Recommended Citation:
Dahn D.R.L.,Braid J.A.,Murphy J.B.,et al. Geochemistry of the Peramora Mélange and Pulo do Lobo schist: Geochemical investigation and tectonic interpretation of mafic mélange in the Pangean suture zone, Southern Iberia[J]. International Journal of Earth Sciences,2014-01-01,103(5)
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