Articles | Volume 11, issue 4
https://doi.org/10.5194/se-11-1227-2020
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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Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Structural geology and tectonics, paleoseismology, rock physics, experimental deformation | Discipline: Structural geology
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Cited articles

Acharyya, S. S. and Mondal, T. K.: Stress enhanced tensile fractures in elliptical clast in conglomerate, J. Struct. Geol., 122, 81–88, https://doi.org/10.1016/j.jsg.2019.02.001, 2019. 
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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.