DOI: 10.1007/s00531-015-1228-5
Scopus记录号: 2-s2.0-84954375746
论文题名: Late Jurassic–Early Cretaceous radiolarian age constraints from the sedimentary cover of the Amasia ophiolite (NW Armenia), at the junction between the Izmir–Ankara–Erzinçan and Sevan–Hakari suture zones
作者: Danelian T. ; Asatryan G. ; Galoyan G. ; Sahakyan L. ; Stepanyan J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2016
卷: 105, 期: 1 起始页码: 67
结束页码: 80
语种: 英语
英文关键词: Amasia ophiolite
; Armenia
; Early Cretaceous
; Late Jurassic
; Lesser Caucasus
; Radiolaria
; Radiolarites
; Volcaniclastic rocks
Scopus关键词: Barremian
; fossil assemblage
; Jurassic-Cretaceous boundary
; ophiolite
; radiolaria
; radiolarite
; siliceous deposit
; suture zone
; volcaniclastic deposit
; Armenia [West Asia]
; Caucasus
; Turkey
; Radiolaria (protozoans)
英文摘要: The Amasia ophiolite, situated at the northernmost corner of Armenia, is part of the Sevan–Hakari suture zone which links with the Izmir–Ankara–Erzinçan suture zone in northern Turkey. Three new radiolarian assemblages have been extracted from siliceous sedimentary rocks that accumulated on the Amasia ophiolite in an oceanic setting. Two of these assemblages were extracted from red-brownish bedded cherts overlying basaltic lavas; one of these is likely to be middle Oxfordian to early Kimmeridgian in age, while the second correlates with the Berriasian. Similar time-equivalent lava-chert sequences have been dated recently using radiolarians from the Stepanavan, Vedi and Sevan ophiolite units, where they are considered to relate to submarine volcanic activity in the back-arc marginal basin in which the Armenian ophiolites were formed. The third radiolarian assemblage, of late Barremian age, was extracted from a more than 15-m-thick volcaniclastic-chert sequence. The related volcanic activity is likely to have been subaerial and probably relates to the formation of an oceanic volcanic plateau; no Cretaceous subaerial volcanism has been previously recorded in the Lesser Caucasus area. © 2015, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84954375746&doi=10.1007%2fs00531-015-1228-5&partnerID=40&md5=3f099e4c7535368850a6f9007c2c7ffb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70203
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: University of Lille, CNRS, UMR 8198, Evo-Eco-Paleo, Lille, France; Institute of Geological Sciences, National Academy of Sciences of Armenia, 24a Baghramyan Avenue, Yerevan, Armenia
Recommended Citation:
Danelian T.,Asatryan G.,Galoyan G.,et al. Late Jurassic–Early Cretaceous radiolarian age constraints from the sedimentary cover of the Amasia ophiolite (NW Armenia), at the junction between the Izmir–Ankara–Erzinçan and Sevan–Hakari suture zones[J]. International Journal of Earth Sciences,2016-01-01,105(1)