Plate tectonic gemstonesстатья из журнала
Аннотация: Research Article| July 01, 2013 Plate tectonic gemstones Robert J. Stern; Robert J. Stern * 1Geosciences Department, University of Texas at Dallas, Richardson, Texas 75083-0688, USA *E-mails: rjstern@utdallas.edu; tatsukix@misasa.okayama-u.ac.jp; gharlow@amnh.org; groat@mail.ubc.ca. Search for other works by this author on: GSW Google Scholar Tatsuki Tsujimori; Tatsuki Tsujimori * 2Pheasant Memorial Laboratory, Institute for Study of the Earth's Interior, Okayama University, 827 Yamada, Misasa, Tottori 682-0193, Japan *E-mails: rjstern@utdallas.edu; tatsukix@misasa.okayama-u.ac.jp; gharlow@amnh.org; groat@mail.ubc.ca. Search for other works by this author on: GSW Google Scholar George Harlow; George Harlow * 3Department of Earth and Planetary Sciences, American Museum of Natural History, New York, New York 10024-5192, USA *E-mails: rjstern@utdallas.edu; tatsukix@misasa.okayama-u.ac.jp; gharlow@amnh.org; groat@mail.ubc.ca. Search for other works by this author on: GSW Google Scholar Lee A. Groat Lee A. Groat * 4Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada *E-mails: rjstern@utdallas.edu; tatsukix@misasa.okayama-u.ac.jp; gharlow@amnh.org; groat@mail.ubc.ca. Search for other works by this author on: GSW Google Scholar Author and Article Information Robert J. Stern * 1Geosciences Department, University of Texas at Dallas, Richardson, Texas 75083-0688, USA Tatsuki Tsujimori * 2Pheasant Memorial Laboratory, Institute for Study of the Earth's Interior, Okayama University, 827 Yamada, Misasa, Tottori 682-0193, Japan George Harlow * 3Department of Earth and Planetary Sciences, American Museum of Natural History, New York, New York 10024-5192, USA Lee A. Groat * 4Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada *E-mails: rjstern@utdallas.edu; tatsukix@misasa.okayama-u.ac.jp; gharlow@amnh.org; groat@mail.ubc.ca. Publisher: Geological Society of America Received: 04 Nov 2012 Revision Received: 25 Jan 2013 Accepted: 29 Jan 2013 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2013 Geological Society of America Geology (2013) 41 (7): 723–726. https://doi.org/10.1130/G34204.1 Article history Received: 04 Nov 2012 Revision Received: 25 Jan 2013 Accepted: 29 Jan 2013 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 Robert J. Stern, Tatsuki Tsujimori, George Harlow, Lee A. Groat; Plate tectonic gemstones. Geology 2013;; 41 (7): 723–726. doi: https://doi.org/10.1130/G34204.1 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 gemstones jadeite and ruby generally form as a result of the plate tectonic processes subduction and collision. Jade made of jadeite (jadeitite) forms when supercritical fluids released from subducting oceanic crust condense in the overlying mantle wedge, 20–120 km deep in the Earth. Jadeitite deposits thus mark the location of exhumed fossil subduction zones. Ruby, the red gem variety of corundum, forms during amphibolite- and granulite-facies metamorphism or melting of mixed Al-rich and Si-poor protoliths, 10–40 km deep in the crust. Suitable conditions generally exist where passive-margin carbonates and shales are involved in continental collision. Most ruby deposits formed during Ediacaran-Cambrian (ca. 550 Ma) collisions that produced the East African–Antarctic orogen and the supercontinent Gondwana, or during Cenozoic collisions in south Asia. Ruby is thus a robust indicator of continental collision. As a result of these diagnostic properties, we propose the term "plate tectonic gemstones" (PTGs) for jadeitite and ruby. The PTGs are a new type of petrotectonic indicator that are mostly found in Neoproterozoic and younger rocks. The PTGs as petrotectonic indicators that form deep in the Earth have the added advantage that their record is unlikely to be obliterated by erosion, although the possibility of destruction via retrogression needs to be further assessed. Recognition of the PTGs links modern concepts of plate tectonics to economic gemstone deposits and ancient concepts of beauty, and may aid in exploration for new deposits. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Год издания: 2013
Издательство: Geological Society of America
Источник: Geology
Ключевые слова: Geological and Geochemical Analysis, earthquake and tectonic studies, High-pressure geophysics and materials
Открытый доступ: closed
Том: 41
Выпуск: 7
Страницы: 723–726