Fault Rock Classification: An aid to structural interpretation in mine and exploration geology

Abstract

Research Article| December 01, 2003 Fault Rock Classification: An aid to structural interpretation in mine and exploration geology A.M. Killick A.M. Killick The Mineral Corporation, P.O. Box 1346, Cramerview 2060, Republic of South Africa, e-mail: akillick@mineralcorp.co.za Search for other works by this author on: GSW Google Scholar Author and Article Information A.M. Killick The Mineral Corporation, P.O. Box 1346, Cramerview 2060, Republic of South Africa, e-mail: akillick@mineralcorp.co.za Publisher: Geological Society of South Africa First Online: 07 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2003 Geological Society of South Africa South African Journal of Geology (2003) 106 (4): 395–402. https://doi.org/10.2113/106.4.395 Article history First Online: 07 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation A.M. Killick; Fault Rock Classification: An aid to structural interpretation in mine and exploration geology. South African Journal of Geology 2003;; 106 (4): 395–402. doi: https://doi.org/10.2113/106.4.395 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 SocietySouth African Journal of Geology Search Advanced Search Abstract Faults are important to the economic geologist in that they can either control the formation of some classes of ore deposits or modify the position and geometry of ore bodies. Fault rock classification is an important part of understanding the structural geology of an area. In this paper practical modifications are suggested to the most commonly used classifications of fault rock, to make it more applicable for the economic geologist. The system recommended is based in the first instance on the classification according to cohesiveness of the rock. The second defining attribute is whether the matrix is foliated or has a random fabric, providing the subdivision of cohesive fault rocks into the mylonitic and cataclastic series. The third attribute used to categorize fault rocks is the proportion of matrix to clasts, and differs in detail from those previously published. The terminology relating to crush breccias used by earlier systems is considered confusing and superfluous and has been eliminated.Although of lesser importance to the economic geologist, the terminology evolving for mylonites and mylonitc gneisses is included and is based on internal fabrics and textures.Application of this simplified classification to geological mapping in underground exploration development and logging of faults in core will enhance the geologist's ability to interpret the structure of ore deposits. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.