Plutonic boninite-like rocks in an anatectic setting: Tectonic implications for the Delamerian orogen in southeastern Australia

Abstract

Research Article| April 01, 2003 Plutonic boninite-like rocks in an anatectic setting: Tectonic implications for the Delamerian orogen in southeastern Australia A.I.S. Kemp A.I.S. Kemp 1Department of Geology, Australian National University, Canberra 0200, Australia Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (4): 371–374. https://doi.org/10.1130/0091-7613(2003)031<0371:PBLRIA>2.0.CO;2 Article history received: 28 Aug 2002 rev-recd: 19 Dec 2002 accepted: 20 Dec 2002 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A.I.S. Kemp; Plutonic boninite-like rocks in an anatectic setting: Tectonic implications for the Delamerian orogen in southeastern Australia. Geology 2003;; 31 (4): 371–374. doi: https://doi.org/10.1130/0091-7613(2003)031<0371:PBLRIA>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 High-Mg, low-Ti diorites in the Cambrian–Ordovician Glenelg River Complex (southeastern Australia) have compositional affinities with the boninitic lavas erupted in intraoceanic arcs, but occur in an anatectic environment mingled with crustal melts. Boninitic rocks have not previously been recorded from such a setting. Field and petrologic evidence suggests that the parental boninitic liquids are approximated by hornblende diorites, crystallization from which yielded complementary cumulates and evolved tonalitic derivatives. The presence of these rocks, and associated arc-like intrusions, compromises collisional tectonic models for the Glenelg River Complex and instead implies early development of the terrane above a subduction zone. Boninitic magmas were subsequently trapped at deep crustal levels during convergent orogenesis. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.