Microdiamonds in Ultrahigh-Pressure Metamorphic Rocks

Research Article| March 01, 2005 Microdiamonds in Ultrahigh-Pressure Metamorphic Rocks Yoshihide Ogasawara Yoshihide Ogasawara 1Department of Earth Sciences, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, Japan E-mail: yoshi777@waseda.jp Search for other works by this author on: GSW Google Scholar Author and Article Information Yoshihide Ogasawara 1Department of Earth Sciences, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, Japan E-mail: yoshi777@waseda.jp Publisher: Mineralogical Society of America First Online: 09 Mar 2017 Online ISSN: 1811-5217 Print ISSN: 1811-5209 © 2005 by the Mineralogical Society of America Elements (2005) 1 (2): 91–96. https://doi.org/10.2113/gselements.1.2.91 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Yoshihide Ogasawara; Microdiamonds in Ultrahigh-Pressure Metamorphic Rocks. Elements 2005;; 1 (2): 91–96. doi: https://doi.org/10.2113/gselements.1.2.91 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 SocietyElements Search Advanced Search Abstract Since the first report of microdiamonds of metamorphic origin in crustal rocks of the Kokchetav Massif, northern Kazakhstan, diamonds have been described from several other ultrahigh-pressure (UHP) metamorphic terranes. In situ diamond is the best indicator of ultrahigh-pressure conditions (>4 GPa), and testifies to subduction of continental crust to depths within the diamond stability field followed by relatively rapid exhumation. In contrast to other UHP terranes, the Kokchetav Massif contains rocks with unusually abundant diamonds, particularly in the Kumdy-Kol region. Kumdy-Kol diamonds exhibit diverse morphologies, dependent upon the host rock. Raman and cathodoluminescence spectra and carbon isotope compositions differ between core and rim, indicating two distinct growth stages. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.