2005/03/01 by Peter J. Heaney, Edward P. Vicenzi, Subarnarekha De · 2 citations
Earth and Planetary Sciences · Computer Science · #Geological and Geochemical Analysis #Geochemistry and Geologic Mapping #earthquake and tectonic studies
paper · doi:10.2113/gselements.1.2.85
openalex publication_date 2005/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/09
Research Article| March 01, 2005 Strange Diamonds: The Mysterious Origins of Carbonado and Framesite Peter J. Heaney; Peter J. Heaney 1Department of Geosciences Penn State University University Park, PA 16802, USA E-mail: [email protected] Search for other works by this author on: GSW Google Scholar Edward P. Vicenzi; Edward P. Vicenzi 2Department of Mineral Sciences Smithsonian Institution Washington, D.C. 20013-7012, USA Search for other works by this author on: GSW Google Scholar Subarnarekha De Subarnarekha De 36338 Nepo Drive San Jose, CA 95119, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Peter J. Heaney 1Department of Geosciences Penn State University University Park, PA 16802, USA E-mail: [email protected] Edward P. Vicenzi 2Department of Mineral Sciences Smithsonian Institution Washington, D.C. 20013-7012, USA Subarnarekha De 36338 Nepo Drive San Jose, CA 95119, USA 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): 85–89. 10.2113/gselements.1.2.85 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 Peter J. Heaney, Edward P. Vicenzi, Subarnarekha De; Strange Diamonds: The Mysterious Origins of Carbonado and Framesite. Elements 2005;; 1 (2): 85–89. doi: 10.2113/gselements.1.2.85 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 Polycrystalline aggregates of diamond called carbonado and framesite have excited the attention of scientists because their crystallization histories are thought to depart markedly from established modes of diamond genesis. In contrast to kimberlitic diamonds, the geochemical signatures of carbonados are systematically crustal. Since the apparent age of carbonados is Archean (∼3.2 Ga), a number of exotic formation theories have been invoked, including metamorphism of the earliest subducted lithosphere, radioactive transformation of mantle hydrocarbon, and meteorite impact on concentrated biomass. Unlike carbonados, framesites are known to originate in the mantle. They appear to have crystallized very rapidly, shortly before the eruption of the kimberlites that brought them to Earth's surface, suggesting that old cratonic materials can be remobilized after long-term storage in the lithosphere. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.