DOI: 10.1007/s00531-012-0807-y
论文题名: Basin formation during the post-collisional evolution of the Eastern Alps: The example of the Lavanttal Basin
作者: Reischenbacher D. ; Sachsenhofer R.F.
刊名: International Journal of Earth Sciences
出版年: 2013
卷: 102, 期: 2 起始页码: 517
结束页码: 543
语种: 英语
英文关键词: Austria
; Carinthia
; Coal
; Miocene
; Sequence stratigraphy
; Structural geology
Scopus关键词: coal
; estuarine environment
; geometry
; Miocene
; sea level
; sedimentology
; sequence stratigraphy
; strike-slip fault
; structural geology
; Alps
; Eastern Alps
; Styrian Basin
英文摘要: The Miocene Lavanttal Basin formed in the Eastern Alps during extrusion of crustal blocks towards the east. In contrast to basins, which formed contemporaneously along the strike-slip faults of the Noric Depression and on top of the moving blocks (Styrian Basin), little is known about the Lavanttal Basin. In this paper geophysical, sedimentological, and structural data are used to study structure and evolution of the Lavanttal Basin. The eastern margin of the 2-km-deep basin is formed by the WNW trending Koralm Fault. The geometry of the gently dipping western basin flank shows that the present-day basin is only a remnant of a former significantly larger basin. Late Early (Karpatian) and early Middle Miocene (Badenian) pull-apart phases initiated basin formation and deposition of thick fluvial (Granitztal Beds), lacustrine, and marine (Mühldorf Fm.) sediments. The Mühldorf Fm. represents the Lower Badenian cycle TB2. 4. Another flooding event caused brackish environments in late Middle Miocene (Early Sarmatian) time, whereas freshwater environments existed in Late Sarmatian time. The coal-bearing Sarmatian succession is subdivided into four fourth-order sequences. The number of sequences suggests that the effect of tectonic subsidence was overruled by sea-level fluctuations during Sarmatian time. Increased relief energy caused by Early Pannonian pull-apart activity initiated deposition of thick fluvial sediments. The present-day shape of the basin is a result of young (Plio-/Pleistocene) basin inversion. In contrast to the multi-stage Lavanttal Basin, basins along the Noric Depression show a single-stage history. Similarities between the Lavanttal and Styrian basins exist in Early Badenian and Early Sarmatian times. © 2012 Springer-Verlag. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874019217&doi=10.1007%2fs00531-012-0807-y&partnerID=40&md5=48ca6f8461aa57899f35babc784e4bcd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70571
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 Applied Geosciences and Geophysics, Montanuniversitaet Leoben, Peter-Tunner-Strasse 5, 8700 Leoben, Austria
Recommended Citation:
Reischenbacher D.,Sachsenhofer R.F.. Basin formation during the post-collisional evolution of the Eastern Alps: The example of the Lavanttal Basin[J]. International Journal of Earth Sciences,2013-01-01,102(2)