Geometry and kinematics of large arcuate structures formed by impingement of rigid granitoids into greenstone belts during progressive shortening

Abstract

Research Article| March 01, 2001 Geometry and kinematics of large arcuate structures formed by impingement of rigid granitoids into greenstone belts during progressive shortening She Fa Chen; She Fa Chen 1Geological Survey of Western Australia, Kalgoorlie Regional Office, P.O. Box 1664, Kalgoorlie, Western Australia 6430, Australia Search for other works by this author on: GSW Google Scholar John W. Libby; John W. Libby 2Tarmoola Operations Pty. Ltd., A PacMin Corporation Limited Company, P.O. Box 67, Leonora, Western Australia 6438, Australia Search for other works by this author on: GSW Google Scholar John E. Greenfield; John E. Greenfield 3Geological Survey of Western Australia, 100 Plain Street, East Perth, Western Australia 6004, Australia Search for other works by this author on: GSW Google Scholar Stephen Wyche; Stephen Wyche 3Geological Survey of Western Australia, 100 Plain Street, East Perth, Western Australia 6004, Australia Search for other works by this author on: GSW Google Scholar Angela Riganti Angela Riganti 3Geological Survey of Western Australia, 100 Plain Street, East Perth, Western Australia 6004, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information She Fa Chen 1Geological Survey of Western Australia, Kalgoorlie Regional Office, P.O. Box 1664, Kalgoorlie, Western Australia 6430, Australia John W. Libby 2Tarmoola Operations Pty. Ltd., A PacMin Corporation Limited Company, P.O. Box 67, Leonora, Western Australia 6438, Australia John E. Greenfield 3Geological Survey of Western Australia, 100 Plain Street, East Perth, Western Australia 6004, Australia Stephen Wyche 3Geological Survey of Western Australia, 100 Plain Street, East Perth, Western Australia 6004, Australia Angela Riganti 3Geological Survey of Western Australia, 100 Plain Street, East Perth, Western Australia 6004, Australia Publisher: Geological Society of America Received: 17 Jul 2000 Revision Received: 29 Nov 2000 Accepted: 30 Nov 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (3): 283–286. https://doi.org/10.1130/0091-7613(2001)029<0283:GAKOLA>2.0.CO;2 Article history Received: 17 Jul 2000 Revision Received: 29 Nov 2000 Accepted: 30 Nov 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation She Fa Chen, John W. Libby, John E. Greenfield, Stephen Wyche, Angela Riganti; Geometry and kinematics of large arcuate structures formed by impingement of rigid granitoids into greenstone belts during progressive shortening. Geology 2001;; 29 (3): 283–286. doi: https://doi.org/10.1130/0091-7613(2001)029<0283:GAKOLA>2.0.CO;2 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 SocietyGeology Search Advanced Search Abstract Regional-scale arcuate structures in the central part of the Archean Yilgarn craton, Western Australia, were generated by impingement of competent granitoid blocks into less competent greenstone belts during progressive east-west shortening. Sinistral shear zones developed along northwest-trending margins of the granitoid blocks, whereas dextral shear zones developed along northeast-trending margins. In apex regions, these northeast- and northwest-trending shear zones are linked by north-trending contractional zones along which shortening was accommodated by the formation of folds and reverse faults in the greenstone belts and a coaxial flattening fabric in granitoid rocks. Lateral escape of the greenstone belts is indicated by the progressive rotation of early macroscopic folds into parallelism with the strike-slip shear zones during granitoid impingement. This recently recognized deformation style may have important tectonic implications for other Archean granite-greenstone terranes and where rock heterogeneity and competency differences are significant. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.