Comparison of upwards splaying and upwards merging in segmented normal growth faults
File(s)Freitag_2017_JSG.pdf (4.16 MB)
Accepted version
Author(s)
Freitag, UA
Sanderson, DJ
Lonergan, L
Bevan, TG
Type
Journal Article
Abstract
A common model for normal fault growth involves a single fault at depth splaying upwards into a series of en-echelon segments. This model is applied to faults as well as a range of extension fractures, including veins, joints and igneous dykes. Examples of splaying growth fault systems in the Columbus Basin, offshore Trinidad, are presented. They include the commonly described upwards splaying type, but also one fault zone with an upward change from disconnected overlapping synthetic faults to a continuous fault. One fault zone with high-displacement fault segments is separated by a relay ramp at depth, becomes breached higher up, developing into a continuous fault at its upper part, where displacements are least. This example suggests that whilst kinematic linkage typically precedes geometric linkage in the evolution of relay ramps, low-displacement parts of a fault system may be geometrically linked whereas higher displacement areas are only kinematically linked.
Date Issued
2017-05-11
Date Acceptance
2017-05-10
Citation
Journal of Structural Geology, 2017, 100, pp.1-11
ISSN
1873-1201
Publisher
Elsevier
Start Page
1
End Page
11
Journal / Book Title
Journal of Structural Geology
Volume
100
Copyright Statement
© 2017 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Geochemistry & Geophysics
0403 Geology
Publication Status
Published