A-type granites revisited: Assessment of a residual-source model

Abstract

Research Article| February 01, 1991 A-type granites revisited: Assessment of a residual-source model Robert A. Creaser; Robert A. Creaser 1Department of Geology, La Trobe University, Bundoora, Victoria 3083, Australia Search for other works by this author on: GSW Google Scholar Richard C. Price; Richard C. Price 1Department of Geology, La Trobe University, Bundoora, Victoria 3083, Australia Search for other works by this author on: GSW Google Scholar Richard J. Wormald Richard J. Wormald 1Department of Geology, La Trobe University, Bundoora, Victoria 3083, Australia Search for other works by this author on: GSW Google Scholar Geology (1991) 19 (2): 163–166. https://doi.org/10.1130/0091-7613(1991)019<0163:ATGRAO>2.3.CO;2 Article history 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 Robert A. Creaser, Richard C. Price, Richard J. Wormald; A-type granites revisited: Assessment of a residual-source model. Geology 1991;; 19 (2): 163–166. doi: https://doi.org/10.1130/0091-7613(1991)019<0163:ATGRAO>2.3.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 A residual-source model for the origin of A-type granites is assessed by examining the likely mineral content and geochemistry of the residue remaining from generation of an I-type granite. Although this model may explain some characteristics of A-type granites, available data suggest that a residual source is unlikely to generate a partial melt with the appropriate major element characteristics. An alternative model for the origin of some A-type granites involves partial melting of crustal igneous rocks of tonalitic to granodioritic composition. Modeling the partial melting of these source rocks suggests that partial melts with water contents appropriate for A-type granites may be generated by ∼15% to 40% melting. This model can predict many other characteristics of A-type granites. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.