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Diamonds from the Popigai impact structure, Russia

1997; Geological Society of America; Volume: 25; Issue: 11 Linguagem: Inglês

10.1130/0091-7613(1997)025 2.3.co;2

1943-2682

Christian Koeberl, В. Л. Масайтис, George I. Shafranovsky, I. Gilmour, F. Langenhorst, Marcus Schrauder,

Geological and Geochemical Analysis

Research Article| November 01, 1997 Diamonds from the Popigai impact structure, Russia Christian Koeberl; Christian Koeberl 1Institute of Geochemistry, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria Search for other works by this author on: GSW Google Scholar Victor L. Masaitis; Victor L. Masaitis 2Karpinsky Geological Research Institute, Sredny prospekt 74, 199026 St. Petersburg, Russia Search for other works by this author on: GSW Google Scholar George I. Shafranovsky; George I. Shafranovsky 2Karpinsky Geological Research Institute, Sredny prospekt 74, 199026 St. Petersburg, Russia Search for other works by this author on: GSW Google Scholar Iain Gilmour; Iain Gilmour 3Planetary Sciences Research Institute, Open University, Milton Keynes MK7 6AA, United Kingdom Search for other works by this author on: GSW Google Scholar Falko Langenhorst; Falko Langenhorst 4Institut für Mineralogie, Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany Search for other works by this author on: GSW Google Scholar Marcus Schrauder Marcus Schrauder 1Institute of Geochemistry, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria Search for other works by this author on: GSW Google Scholar Geology (1997) 25 (11): 967–970. https://doi.org/10.1130/0091-7613(1997)025 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 Christian Koeberl, Victor L. Masaitis, George I. Shafranovsky, Iain Gilmour, Falko Langenhorst, Marcus Schrauder; Diamonds from the Popigai impact structure, Russia. Geology 1997;; 25 (11): 967–970. doi: https://doi.org/10.1130/0091-7613(1997)025 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 Diamonds were found in impact melt rocks and breccias at the Popigai impact structure in Siberia. The diamonds preserve the crystallographic habit and twinning of graphites in the preimpact target rocks, from which they formed by shock transformation. Secondary and transmission electron microscopy indicate that the samples are polycrystalline and contain abundant very thin lamellae, which could represent stacking faults, with local hexagonal symmetry, or microtwins. Microcrystalline units are ≤1 µm. Infrared spectroscopy indicates the presence of solid CO2 and water in microinclusions in the diamonds, CO2 being under a pressure greater than 5 GPa (at room temperature). Trace element and isotopic compositions confirm the derivation from graphite precursors. 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.