globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-015-1232-9
Scopus记录号: 2-s2.0-84939635687
论文题名:
Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes Zone and from the Central Iberian Zone (NW Iberian Massif)
作者: Dias da Silva Í.; Díez Fernández R.; Díez-Montes A.; González Clavijo E.; Foster D.A.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2016
卷: 105, 期:4
起始页码: 1127
结束页码: 1151
语种: 英语
英文关键词: Continental rifting ; Iberian Massif ; Northern Gondwana ; Ordovician volcanics ; Passive Margin ; Rheic Ocean
Scopus关键词: basalt ; crystallization ; Gondwana ; igneous geochemistry ; inductively coupled plasma method ; magmatism ; Ordovician ; passive margin ; rhyolite ; rifting ; uranium-lead dating ; zircon ; Iberian Massif
英文摘要: LA-MC-ICP-MS U–Pb zircon ages and whole-rock geochemical data obtained from volcanic rocks erupted in the northern margin of Gondwana provide new insights on the polyphase magmatic evolution of the NW Iberian domain during the establishment of passive margin conditions in Lower Paleozoic times. The U–Pb data show crystallization ages of ca. 455 Ma for two calc-alkaline rhyolites sampled in the Upper Parautochthon of the eastern Galicia—Trás-os-Montes Zone (GTMZ) and for an intraplate basalt intruded into Middle Ordovician slates of the autochthonous series of the Central Iberian Zone (CIZ). Together with previous data, the ages obtained reveal a periodic magmatic activity across the northern Gondwana margin during the Lower Paleozoic, which is comparable to that observed in NE Iberia and in other massifs of the Mediterranean realm. Both geochronological and geochemical data reinforce paleontological and stratigraphic evidences for paleogeographic proximity between these domains and contribute to the recognition of extensional-related magmatism along the northern margin of Central Gondwana associated with the opening of the Rheic Ocean. © 2015, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939635687&doi=10.1007%2fs00531-015-1232-9&partnerID=40&md5=59c68f491a21e31df81d662a7878ecae
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70162
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: Instituto Dom Luiz, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Edifício C8, Piso 3, Lisbon, Portugal; Departamento de Geociências, Instituto Dom Luiz, ECT, Universidade de Évora, Apartado 94, Évora, Portugal; Department of Geological Sciences, University of Florida, P.O. Box 112120, Gainesville, FL, United States; Instituto Geológico y Minero de España, Unidad de Salamanca, Azafranal, 48, Salamanca, Spain

Recommended Citation:
Dias da Silva Í.,Díez Fernández R.,Díez-Montes A.,et al. Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes Zone and from the Central Iberian Zone (NW Iberian Massif)[J]. International Journal of Earth Sciences,2016-01-01,105(4)
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