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Displacement profiles and displacement-length scaling relationships of thrust faults constrained by seismic-reflection data

Kristian J. Bergen and John H. Shaw
Displacement profiles and displacement-length scaling relationships of thrust faults constrained by seismic-reflection data
Geological Society of America Bulletin (July 2010) 122 (7-8): 1209-1219

Abstract

This study used high-resolution, two- and three-dimensional, seismic-reflection data from the Niger Delta, Sichuan Basin, and Magdalena Basin to analyze displacement profile patterns and scaling relationships between the maximum displacement and length (D (sub max) v. L) of thrust faults, referred to as displacement-length scaling relationships. The thrust faults mapped in this study exhibited highly variable displacement profiles, both in terms of shape and overall magnitude of displacement. A robust power-law displacement-length scaling relationship was obtained for all three data sets combined, yielding a scaling relationship (n=0.87) close to the linear fit most often observed for normal faults and thrust faults. At the regional scale, however, a robust fit was obtained only for the Sichuan Basin, and with a nonlinear displacement-length scaling relationship (n=0.58) suggesting scale dependence in this region. Many displacement profiles exhibited steep displacement gradients at the fault tips and shallow gradients in between, often with multiple maxima. These features are interpreted with conceptual growth models for thrust faults: hard linkage and soft linkage fault interaction models, a detachment linkage fault interaction model, and an overburden-limited, fault-growth model.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 122
Serial Issue: 7-8
Title: Displacement profiles and displacement-length scaling relationships of thrust faults constrained by seismic-reflection data
Affiliation: Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
Pages: 1209-1219
Published: 201007
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 81
Accession Number: 2010-050195
Categories: Structural geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2010026
Illustration Description: illus. incl. sects.
N04°15'00" - N05°00'00", E05°00'00" - E07°30'00"
N26°00'00" - N34°10'00", E97°30'00" - E108°25'00"
N01°49'60" - N11°04'60", W76°10'00" - W73°45'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201027
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