Regional ultrahigh-pressure coesite-bearing eclogitic terrane in central China: Evidence from country rocks, gneiss, marble, and metapelite

Abstract

Research Article| September 01, 1991 Regional ultrahigh-pressure coesite-bearing eclogitic terrane in central China: Evidence from country rocks, gneiss, marble, and metapelite Xiaomin Wang; Xiaomin Wang 1Department of Geology, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar J. G. Liou J. G. Liou 1Department of Geology, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar Author and Article Information Xiaomin Wang 1Department of Geology, Stanford University, Stanford, California 94305 J. G. Liou 1Department of Geology, Stanford University, Stanford, California 94305 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (9): 933–936. https://doi.org/10.1130/0091-7613(1991)019<0933:RUPCBE>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 Email Permissions Search Site Citation Xiaomin Wang, J. G. Liou; Regional ultrahigh-pressure coesite-bearing eclogitic terrane in central China: Evidence from country rocks, gneiss, marble, and metapelite. Geology 1991;; 19 (9): 933–936. doi: https://doi.org/10.1130/0091-7613(1991)019<0933:RUPCBE>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 The Dabie Mountains represent a fault-bounded, coesite-bearing eclogite gneissic terrane within the collisional belt between the Sino-Korean and Yangtze cratons. The following geologic evidence indicates that this terrane has been subjected to regional ultrahigh-pressure metamorphism. (1) The country rocks have a metamorphic pressure-temperature evolution compatible with that of the eclogites, on the basis of the occurrence of quartz pseudomorphs after coesite, calcite pseudomorphs after aragonite, relict high-pressure assemblages in different rock types of the country rocks, and consistent, comparable compositional zonations of garnets in both country rocks and eclogites. (2) Peak metamorphic pressure-temperature conditions consistently decrease both from east to west in the collisional belt and from north to south in the Dabie Mountains, and clockwise pressure-temperature paths are common for eclogites over the region. (3) Layered eclogites interbedded with gneisses and amphibolites contain omphacite, kyanite, and garnet, indicating a minimum pressure of 20 kbar at 600 °C for formation of these rocks. 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.