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Dating of zircon from Ti-clinohumite–bearing garnet peridotite: Implication for timing of mantle metasomatism

2003; Geological Society of America; Volume: 31; Issue: 8 Linguagem: Inglês

10.1130/g19525.1

1943-2682

Ikuo Katayama, Atsumi Muko, Tsuyoshi Iizuka, Shigenori Maruyama, Kentaro Terada, Yukiyasu Tsutsumi, Yuji Sano, Ru Y. Zhang, J. G. Liou,

High-pressure geophysics and materials

Research Article| August 01, 2003 Dating of zircon from Ti-clinohumite–bearing garnet peridotite: Implication for timing of mantle metasomatism Ikuo Katayama; Ikuo Katayama 1Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551, Japan Search for other works by this author on: GSW Google Scholar Atsumi Muko; Atsumi Muko 2Department of Earth Sciences, Waseda University, Tokyo 169-8050, Japan Search for other works by this author on: GSW Google Scholar Tsuyoshi Iizuka; Tsuyoshi Iizuka 3Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551, Japan Search for other works by this author on: GSW Google Scholar Shigenori Maruyama; Shigenori Maruyama 3Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551, Japan Search for other works by this author on: GSW Google Scholar Kentaro Terada; Kentaro Terada 4Department of Earth and Planetary Sciences, Hiroshima University, Hiroshima 739-8526, Japan Search for other works by this author on: GSW Google Scholar Yukiyasu Tsutsumi; Yukiyasu Tsutsumi 4Department of Earth and Planetary Sciences, Hiroshima University, Hiroshima 739-8526, Japan Search for other works by this author on: GSW Google Scholar Yuji Sano; Yuji Sano 5Ocean Research Institute, Tokyo University, Tokyo 164-8639, Japan Search for other works by this author on: GSW Google Scholar Ru Y. Zhang; Ru Y. Zhang 6Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Juhn G. Liou Juhn G. Liou 6Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (8): 713–716. https://doi.org/10.1130/G19525.1 Article history received: 28 Jan 2003 rev-recd: 21 Apr 2003 accepted: 23 Apr 2003 first online: 02 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 Ikuo Katayama, Atsumi Muko, Tsuyoshi Iizuka, Shigenori Maruyama, Kentaro Terada, Yukiyasu Tsutsumi, Yuji Sano, Ru Y. Zhang, Juhn G. Liou; Dating of zircon from Ti-clinohumite–bearing garnet peridotite: Implication for timing of mantle metasomatism. Geology 2003;; 31 (8): 713–716. doi: https://doi.org/10.1130/G19525.1 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 Garnet peridotites from the Kokchetav ultrahigh-pressure (UHP) massif contain abundant volatile and high field strength element (HFSE) bearing minerals, such as Ti-clinohumite and zircon. These characteristics are interpreted to be related to fluid-infiltrated mantle metasomatism from the oceanic lithosphere that had been subducted below the area. The zircons from the peridotites were dated by using sensitive high-resolution ion microprobe (SHRIMP) and yielded apparent U-Pb ages of 554–494 Ma (weighted mean age, 528 Ma) that are mostly consistent with the timing of UHP metamorphism deduced from diamond-bearing country rocks in this massif. These zircons have an almost flat rare earth element (REE) pattern and very low REE concentrations; these characteristics are similar to those observed in kimberlitic zircons. Inherited zircon cores, although only rarely preserved, yielded apparently Proterozoic ages and have different trace element characteristics compared to the overgrowth rims. These features indicate that the mantle metasomatic events and the recrystallization of Ti-clinohumite and zircon were due to HFSE-enriched fluid infiltration during the UHP metamorphism at great depths. The metasomatized mantle may have been transported farther into the deep upper mantle and contributed to the source of intraplate magmas such as kimberlites and alkali basalts, because these rocks have characteristically high volatile and HFSE concentrations such as those of the Ti-clinohumite–bearing garnet peridotites. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.