DOI: 10.1007/s00531-012-0800-5
论文题名: Fission-track constraints on the thermal and tectonic evolution of the Apuseni Mountains (Romania)
作者: Kounov A. ; Schmid S.M.
刊名: International Journal of Earth Sciences
出版年: 2013
卷: 102, 期: 1 起始页码: 207
结束页码: 233
语种: 英语
英文关键词: Apuseni Mountains
; Dacia
; Fission-track analysis
; Tisza
; Transylvanian ophiolites
Scopus关键词: apatite
; Cretaceous
; fission track dating
; geochronology
; Jurassic
; nappe
; obduction
; ophiolite
; structural geology
; tectonic evolution
; tectonic setting
; thermal structure
; zircon
; Apuseni Mountains
; Carpathians
; Romania
英文摘要: New zircon and apatite fission-track (FT) data, including apatite thermal modelling, are combined with an extensive literature survey and reconnaissance-type structural fieldwork in the Eastern Apuseni Mountains. This leads to a better understanding of the complex structural and thermal history of a key area at the boundary between two megatectonic units in the Balkan peninsula, namely the Tisza and Dacia Mega-Units. Following Late Jurassic obduction of the Transylvanian ophiolites onto a part of the Dacia Mega-Unit, that is, the Biharia nappe system, both units were buried to a minimum of 8 km during late Early Cretaceous times when these units were underthrust below the Tisza Mega-Unit consisting of the present-day Codru and Bihor nappe systems. Tisza formed the upper plate during Early Cretaceous ('Austrian') east-facing orogeny. Turonian to Campanian zircon FT cooling ages (95-71 Ma) from the Bihor and Codru nappe systems and the Biharia and Baia de Arieş nappes (at present the structurally lowest part of the Dacia Mega-Unit) record exhumation that immediately followed a second Cretaceous-age (i. e. Turonian) orogenic event. Thrusting during this overprinting event was NW-facing and led to the overall geometry of the present-day nappe stack in the Apuseni Mountains. Zircon FT ages, combined with thermal modelling of the apatite FT data, show relatively rapid post-tectonic cooling induced by a third shortening pulse during the latest Cretaceous ('Laramian' phase), followed by slower cooling across the 120°-60 °C temperature interval during latest Cretaceous to earliest Paleogene times (75-60 Ma). Cenozoic-age slow cooling (60-40 Ma) was probably related to erosional denudation postdating 'Laramian' large-scale updoming. © 2012 Springer-Verlag. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872287610&doi=10.1007%2fs00531-012-0800-5&partnerID=40&md5=984d19d9faff43c2929458ee0ac4c1b4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70583
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 Geology and Paleontology, Basel University, 4056 Basel, Switzerland; Institute of Geophysics, ETH, 8092 Zürich, Switzerland
Recommended Citation:
Kounov A.,Schmid S.M.. Fission-track constraints on the thermal and tectonic evolution of the Apuseni Mountains (Romania)[J]. International Journal of Earth Sciences,2013-01-01,102(1)