Articles | Volume 11, issue 4
Solid Earth, 11, 1227–1246, 2020
https://doi.org/10.5194/se-11-1227-2020

Special issue: Faults, fractures, and fluid flow in the shallow crust

Solid Earth, 11, 1227–1246, 2020
https://doi.org/10.5194/se-11-1227-2020
Research article
08 Jul 2020
Research article | 08 Jul 2020

Control of pre-existing fabric in fracture formation, reactivation and vein emplacement under variable fluid pressure conditions: an example from Archean greenstone belt, India

Sreyashi Bhowmick and Tridib Kumar Mondal

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Latest update: 31 Jan 2023
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Short summary
We explore pre-existing fabric in metabasalts replete with a wide range of crisscross fractures/faults, hosting quartz veins of variable orientations and thicknesses in the Chitradurga region, India. The fractures are identified as components of a riedel shear system. We evaluate reactivation potential of fractures and conclude that episodic changes in fluid pressure conditions triggered fault-valve action, thereby reactivating fabric and fractures, leading to vein emplacement in the region.