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Brecciation driven by changes in fluid column heights

Brecciation driven by changes in fluid column heights
Brecciation driven by changes in fluid column heights

A mechanism is presented for the pulses of high fluid pressure (PF) necessary for fluid-assisted brecciation. Establishment of hydraulic- or pneumatic-connectivity between rock masses with different PF can cause overpressure in the higher rocks because the PF gradient is parallel to the hydrostatic gradient (the centroid effect). PF can become high enough to create a fracture network, with an influx of fluids and mineralisation occurring as fluids migrate to areas of lower PF. Changes in PF caused by the centroid effect can cause other structures and seismicity.

0954-4879
76-81
Peacock, David C.P.
6a9e5a6a-445c-4412-8afa-053bcb1cc9cb
Rotevatn, Atle
a5811643-0e5c-4b86-9145-54f5810fbe4c
Sanderson, David J.
5653bc11-b905-4985-8c16-c655b2170ba9
Peacock, David C.P.
6a9e5a6a-445c-4412-8afa-053bcb1cc9cb
Rotevatn, Atle
a5811643-0e5c-4b86-9145-54f5810fbe4c
Sanderson, David J.
5653bc11-b905-4985-8c16-c655b2170ba9

Peacock, David C.P., Rotevatn, Atle and Sanderson, David J. (2019) Brecciation driven by changes in fluid column heights. Terra Nova, 31 (1), 76-81. (doi:10.1111/ter.12371).

Record type: Article

Abstract

A mechanism is presented for the pulses of high fluid pressure (PF) necessary for fluid-assisted brecciation. Establishment of hydraulic- or pneumatic-connectivity between rock masses with different PF can cause overpressure in the higher rocks because the PF gradient is parallel to the hydrostatic gradient (the centroid effect). PF can become high enough to create a fracture network, with an influx of fluids and mineralisation occurring as fluids migrate to areas of lower PF. Changes in PF caused by the centroid effect can cause other structures and seismicity.

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More information

Accepted/In Press date: 28 October 2018
e-pub ahead of print date: 19 December 2018
Published date: 1 February 2019

Identifiers

Local EPrints ID: 429230
URI: http://eprints.soton.ac.uk/id/eprint/429230
DOI: doi:10.1111/ter.12371
ISSN: 0954-4879
PURE UUID: 20e08c16-de93-43bb-af03-7800239fbf93
ORCID for David J. Sanderson: ORCID iD orcid.org/0000-0002-2144-3527

Catalogue record

Date deposited: 22 Mar 2019 17:30
Last modified: 18 Mar 2024 03:09

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Contributors

Author: David C.P. Peacock
Author: Atle Rotevatn
Author: David J. Sanderson ORCID iD

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