DOI: 10.1007/s00531-013-0991-4
Scopus记录号: 2-s2.0-84896547995
论文题名: Palaeoproterozoic (1.83 Ga) zircons in a Bajocian (169 Ma) granite within a Middle Jurassic ophiolite (Rubiku, central Albania): A challenge for geodynamic models
作者: Kryza R. ; Beqiraj A.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 3 起始页码: 607
结束页码: 625
语种: 英语
英文关键词: Continental crust
; Oceanic lithosphere
; Ophiolite
; Plagiogranite
; Zircon SHRIMP geochronology
Scopus关键词: Bajocian
; continental crust
; geochronology
; geodynamics
; granite
; oceanic lithosphere
; ophiolite
; petrogenesis
; plagiogranite
; Proterozoic
; SHRIMP dating
; tectonic setting
; zircon
; Albania
英文摘要: Two distinct zircon populations, 1,827 ± 17 and 169 ± 2 Ma in age, have been found in the Rubiku granite dyke in the Middle Jurassic Mirdita ophiolite in central Albania. The old inherited zircons represent a homogeneous population formed during a discrete Palaeoproterozoic, likely magmatic, zircon crystallization event. These older zircons were likely incorporated, in large part, into the granite magma that crystallized broadly at the time of the ophiolite emplacement (around 169 Ma). The limited data available do not allow for the construction of an unequivocal petrogenetic model, though several palaeotectonic scenarios are discussed as possible settings for the granite formation. The models refer to recent findings of old inherited zircons in rocks at recent mid-ocean ridge settings, but also consider likely contributions of crustal materials to primary basic ophiolitic magmas within supra-subduction settings and subsequent accretion/collision circumstances. The presence of old zircons in much younger rocks within ophiolite successions runs counter to geodynamic models of interaction between the oceanic lithosphere and continental crust, but constraining their genesis would require further systematic studies on these old inherited zircons, both in mafic (if present) and in felsic rocks of the ophiolites. © 2014 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896547995&doi=10.1007%2fs00531-013-0991-4&partnerID=40&md5=4400b6d95c8cc4d6253479e0883b70f0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70391
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: Institute of Geological Sciences, University of Wrocław, ul Cybulskiego 30, 20-205 Wrocław, Poland; Polytechnic University of Tirana, Rruga Elbasanit, Tiranë, Albania
Recommended Citation:
Kryza R.,Beqiraj A.. Palaeoproterozoic (1.83 Ga) zircons in a Bajocian (169 Ma) granite within a Middle Jurassic ophiolite (Rubiku, central Albania): A challenge for geodynamic models[J]. International Journal of Earth Sciences,2014-01-01,103(3)