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High Resolution Reflection Seismic Profiling Over the Tjellefonna Fault in the Møre-trøndelag Fault Complex, Norway : Volume 4, Issue 1 (03/02/2012)

By Lundberg, E.

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Book Id: WPLBN0004021840
Format Type: PDF Article :
File Size: Pages 38
Reproduction Date: 2015

Title: High Resolution Reflection Seismic Profiling Over the Tjellefonna Fault in the Møre-trøndelag Fault Complex, Norway : Volume 4, Issue 1 (03/02/2012)  
Author: Lundberg, E.
Volume: Vol. 4, Issue 1
Language: English
Subject: Science, Solid, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Juhlin, C., Nasuti, A., & Lundberg, E. (2012). High Resolution Reflection Seismic Profiling Over the Tjellefonna Fault in the Møre-trøndelag Fault Complex, Norway : Volume 4, Issue 1 (03/02/2012). Retrieved from

Description: Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden. The Møre-Trøndelag Fault Complex (MTFC) is one of the most prominent fault zones of Norway, both onshore and offshore. In spite of its importance, very little is known of the deeper structure of the individual fault segments comprising the fault complex. Most seismic lines have been recorded offshore or focused on deeper structures. This paper presents results from two reflection seismic profiles, located on each side of the Tingvollfjord, acquired over the Tjellefonna fault in the south-eastern part of the MTFC. Possible kilometer scale vertical offsets reflecting, large scale north-west dipping normal faulting separating the high topography to the south-east from lower topography to the north-west have been proposed for the Tjellefonna fault. In this study, however, the Tjellefonna fault is interpreted to dip approximately 50–60° towards the south-east to depths of at least 1.4 km. Travel-time modeling of reflections associated with the fault was used to establish the geometry of the fault structure at depth and detailed analysis of first P-wave arrivals in shot-gathers together with resistivity profiles were used to define the near surface geometry of the fault zone. A continuation of the structure on the north-eastern side of the Tingvollfjord is suggested by correlation of an in strike direction P-S converted reflection (generated by a fracture zone) seen on the reflection data from that side of the Tingvollfjord. The reflection seismic data correlate well with resistivity profiles and recently published near surface geophysical data. A highly reflective package forming a gentle antiform structure was also identified on both seismic profiles. The structure may be an important boundary within the gneissic basement rocks of the Western Gneiss Region. The Fold Hinge Line is parallel with the Tjellefonna fault trace while the topographic lineament diverges, following secondary fracture zones towards north-east.

High resolution reflection seismic profiling over the Tjellefonna fault in the Møre-Trøndelag Fault Complex, Norway

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