DOI: 10.1007/s00531-012-0846-4
论文题名: Kinematic analysis and analogue modelling of the Passeier- and Jaufen faults: Implications for crustal indentation in the Eastern Alps
作者: Luth S. ; Willingshofer E. ; ter Borgh M. ; Sokoutis D. ; van Otterloo J. ; Versteeg A.
刊名: International Journal of Earth Sciences
出版年: 2013
卷: 102, 期: 4 起始页码: 1071
结束页码: 1090
语种: 英语
英文关键词: Alps
; Analogue modelling
; Geodynamics
; Indentation tectonics
; Orogeny
; Paleostress analysis
; Structural geology
Scopus关键词: brittle deformation
; crustal deformation
; crustal structure
; ductile deformation
; exhumation
; fault zone
; geodynamics
; greenschist facies
; indentation
; mylonite
; orogeny
; paleostress
; plate motion
; tectonic evolution
; transpression
; Alps
; Bolzano
; Eastern Alps
; Italy
; Passeier Valley
; Trentino-Alto Adige
英文摘要: Crustal deformation in front of an indenter is often affected by the indenter's geometry, rheology, and motion path. In this context, the kinematics of the Jaufen- and Passeier faults have been studied by carrying out paleostress analysis in combination with crustal-scale analogue modelling to infer (1) their relationship during indentation of the Adriatic plate and (2) their sensitivity in terms of fault kinematics to the geometry and motion path of Adria. The field study reveals mylonites along the Jaufen fault, which formed under lower greenschist facies conditions and is associated with top-to-the-west/northwest shear with a northern block down component. In addition, a brittle reactivation of the Jaufen shear zone under NNW-SSE to NW-SE compressional and ENE-WSW tensional stress conditions was deduced from paleostress analysis. The inferred shortening direction is consistent with fission track ages portraying Neogene exhumation of the Meran-Mauls basement south of the fault. Along the Passeier fault, deformation was only brittle to semi-ductile and paleostress tensors record that the fault was subjected to E-W extension along its northern segment varying into NW-SE compression and sinistral transpression along its southern segment. In the performed analogue experiments, a rigid, triangular shaped indenter was pushed into a sand pile resulting in the formation of a Passeier-like fault sprouting from the indenter's tip. These kinds of north-trending tip faults formed in all experiments with shortening directions towards the NW, N, or NE. Consequently, we argue that the formation of the Passeier fault strongly corresponds to the outline of the Adriatic indenter and was only little affected by the indenter's motion path due to induced strain partitioning in front of the different indenter segments. The associated fault kinematics along the Passeier fault including both E-W extension and NNW to NW shortening, however, is most consistent with a northward advancing Adriatic indenter. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878109783&doi=10.1007%2fs00531-012-0846-4&partnerID=40&md5=78e7fa3dfe4f5a714a56137f919fe20d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70551
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 Earth Sciences, Faculty of Earth and Life Sciences, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, Netherlands; Faculty of Geosciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands; Department of Geosciences, University of Oslo, Oslo, Norway; School of Geosciences, Monash University, Melbourne, VIC, Australia; Swedish Geological Survey (SGU), Uppsala, Sweden
Recommended Citation:
Luth S.,Willingshofer E.,ter Borgh M.,et al. Kinematic analysis and analogue modelling of the Passeier- and Jaufen faults: Implications for crustal indentation in the Eastern Alps[J]. International Journal of Earth Sciences,2013-01-01,102(4)