Research Article| May 01, 2005 Carbonate dilation breccias: Examples from the damage zone to the Dent Fault, northwest England Jon P.T. Tarasewicz; Jon P.T. Tarasewicz 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Search for other works by this author on: GSW Google Scholar Nigel H. Woodcock; Nigel H. Woodcock 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Search for other works by this author on: GSW Google Scholar J. Anthony D. Dickson J. Anthony D. Dickson 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Jon P.T. Tarasewicz 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Nigel H. Woodcock 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK J. Anthony D. Dickson 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Publisher: Geological Society of America Received: 19 Jan 2004 Revision Received: 15 Jun 2004 Accepted: 23 Jun 2004 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2005) 117 (5-6): 736–745. https://doi.org/10.1130/B25568.1 Article history Received: 19 Jan 2004 Revision Received: 15 Jun 2004 Accepted: 23 Jun 2004 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jon P.T. Tarasewicz, Nigel H. Woodcock, J. Anthony D. Dickson; Carbonate dilation breccias: Examples from the damage zone to the Dent Fault, northwest England. GSA Bulletin 2005;; 117 (5-6): 736–745. doi: https://doi.org/10.1130/B25568.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The obliqu-reverse Dent Fault, northwest England, throws Carboniferous limestone units in the footwall against mudston-dominated lower Paleozoic rocks in the hanging wall. The fault zone cuts the kilometer-wide steep limb of a precursory forced monocline. However, individual fault strands comprise centimeter-scale cataclasite cores fringed in the footwall carbonates by damage zones, some meters to tens of meters wide, composed of random-fabric dilation breccias. Breccia texture and microstructure, revealed by stained thin sections and peels, imply rapid coseismic fragmentation and then interseismic resealing by void-filling cements. The cements varied in composition through time from calcite to dolomite and then to ferroan calcite. Pervasive dolomitization of the protolith is common in the breccia zones. A key observation is that each volume of dilation breccia shows only limited refracture. This tendency to singl-phase brecciation suggests that cementation caused reseal-hardening of breccia with respect to intact protolith. Breccia thickness and refracture are greatest at jogs in the Dent Fault, but breccia distribution suggests that damage also accumulated in fault walls and at propagating fault tips. Dilation breccias are a common but poorly documented product of brittle deformation of limestone. Their reseal histories can provide valuable general clues to fault zone evolution. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.