Journal
JOURNAL OF STRUCTURAL GEOLOGY
Volume 101, Issue -, Pages 43-57Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsg.2017.05.012
Keywords
Fluid flow; Fault; Fracture; Damage zone; Connectivity; Topology
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Funding
- BKK-UiB
- VISTA
- Statoil
- Research Council of Norway through ENERGIX [244129/E20]
- University of Bergen
- Norwegian Academy of Science and Letters
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Structural complexity along faults (e.g., relay zones, fault intersections and jogs) exert strong controls on fluid flow, yet few attempts have been made to quantify and visualise such relationships. This paper does that using an outcrop-based study of fracture networks in carbonate rocks in Malta. We investigate the spatial distribution of low-porosity cemented mounds within the fracture networks, and the geometry and topology of the fracture networks are characterised. The mounds are associated with low porosity due to selective cementation along the faults, as well as with peaks in connecting node frequency (a topological proxy for network connectivity), and fracture intensity (a fracture abundance proxy for network complexity). Considering the mounds as a record of palaeo-fluid flow and palaeo-fluid-rock-interaction, this work therefore quantifies and visualises the relationship between structural complexity and fluid flow. (C) 2017 The Author(s). Published by Elsevier Ltd.
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