Discovery of epidosites in a modern oceanic setting, the Tonga forearc

Research Article| February 01, 2000 Discovery of epidosites in a modern oceanic setting, the Tonga forearc Neil R. Banerjee; Neil R. Banerjee 1School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia V8W 3P6, Canada Search for other works by this author on: GSW Google Scholar Kathryn M. Gillis; Kathryn M. Gillis 1School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia V8W 3P6, Canada Search for other works by this author on: GSW Google Scholar Karlis Muehlenbachs Karlis Muehlenbachs 2Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar Geology (2000) 28 (2): 151–154. https://doi.org/10.1130/0091-7613(2000)28<151:DOEIAM>2.0.CO;2 Article history received: 09 Aug 1999 rev-recd: 20 Oct 1999 accepted: 29 Oct 1999 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Neil R. Banerjee, Kathryn M. Gillis, Karlis Muehlenbachs; Discovery of epidosites in a modern oceanic setting, the Tonga forearc. Geology 2000;; 28 (2): 151–154. doi: https://doi.org/10.1130/0091-7613(2000)28<151:DOEIAM>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyGeology Search Advanced Search Abstract The first suite of oceanic epidosites has been recovered from the Tonga forearc. Epidosites are metal-depleted rocks composed of subequal proportions of epidote and quartz that lack any original igneous texture. Epidosites have been interpreted to form in upflow zones at the base of ore-forming oceanic hydrothermal systems that vent as black smokers on the sea floor. Tongan epidosites metasomatically replaced basaltic and plagiogranite protoliths and formed under similar conditions to epidosites hosted in many ophiolites interpreted to have formed in a suprasubduction-zone setting. The similarities shared by the Tongan and suprasubduction-zone ophiolite epidosites, along with the absence of epidosites in collections from modern mid-ocean ridges, suggest that tectonic setting plays a role in their formation. You do not currently have access to this article.