Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-10T10:42:39.976Z Has data issue: false hasContentIssue false
  • English
  • Français

Retrograde strontium metasomatism in serpentinite mélange of the Kurosegawa Zone in central Kyushu, Japan

Published online by Cambridge University Press:  05 July 2018

T. Miyazoe ,
M. Enami ,
T. Nishiyama  and
Y. Mori
T. Miyazoe*
Affiliation:
Department of Earth and Planetary Sciences, Nagoya University, Chikusa-Ku, Nagoya 464-8601, Japan Department of Earth and Environment, Graduate School of Science and Technology, Kumamoto University, 2-39-1, Kurokami, Kumamoto 860-8555, Japan
M. Enami
Affiliation:
Department of Earth and Planetary Sciences, Nagoya University, Chikusa-Ku, Nagoya 464-8601, Japan
T. Nishiyama
Affiliation:
Department of Earth and Environment, Graduate School of Science and Technology, Kumamoto University, 2-39-1, Kurokami, Kumamoto 860-8555, Japan
Y. Mori
Affiliation:
Kitakyushu Museum of Natural History and Human History, 2-4-1, Higashida, Yahatahigashi-Ku, Kitakyushu 805-0071, Japan
*
E-mail: miyazoe.tomoyuki@g.mbox.nagoya-u.ac.jp
Get access Rights & Permissions [Opens in a new window]

Abstract

Strontium-rich epidote, including epidote-(Sr) and epidote with major amounts of Sr (i.e. epidote containing up to 17.3 wt.% SrO), was found in pumpellyite schist and epidote blueschist in a tectonic block in the serpentinite mélange of the Kurosegawa Zone, central Kyushu, Japan. The tectonic block is 20 m wide and made primarily of lawsonite blueschist, with subordinate amounts of pumpellyite schist and epidote blueschist. The pumpellyite schist typically occurs at the edge of the block and is composed mainly of pumpellyite with subordinate amounts of strontium-poor epidote, albite and chlorite, and thin veins of fine-grained calcite and clinopyroxene. Epidote-(Sr) forms rims around strontium-poor epidote, fills fractures in strontium-poor epidote and also occurs interstitially between pumpellyite aggregates and along the boundaries between pumpellyite and calcite-clinopyroxene veins. The epidote blueschist is found between the pumpellyite schist and lawsonite blueschist, and consists mainly of sodic amphibole, epidote and titanite, with albite veining. Strontium-rich epidote occurs as rims, replacing Sr-poor epidote near the albite vein. The bulk strontium contents of the rocks are as follows: lawsonite blueschist (200 ppm), epidote blueschist (2800 ppm) and pumpellyite schist (~10,700 ppm). The chemical and petrological characteristics of the Sr-rich epidote-bearing metabasites suggest that the infiltration of a metamorphic fluid promoted extensive Sr metasomatism during the later stages of high-pressure metamorphism.

Keywords

strontiumepidotemetasomatismblueschistpumpellyite actinolite facies metamorphism
Type
Research Article
Information
Mineralogical Magazine , Volume 76 , Issue 3 , June 2012 , pp. 635 - 647
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2016

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ahijado, A., Casillas, R., Nagy, G. and Fernández, C. (2005) Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain). Mineralogy an. Petrology, 84, 107—127 CrossRefGoogle Scholar
Barnes, J.D., Selverstone, J. and Sharp, Z.D. (2004) Interactions between serpentinite devolatization, metasomatism and strike-slip strain localization during deep-crustal shearing in the Eastern Alps. Journal of Metamorphi. Geology, 22, 283—300 Google Scholar
Beane, R.J. and Liou, J.G. (2005) Metasomatism in serpentinite mélange rocks from the high-pressure Maksyutov Complex, southern Ural Mountains, Russiav. International Geology Review, 47, 24—40.CrossRefGoogle Scholar
Brastad, K. (1985) Sr metasomatism, and partition of Sr between the mineral phases of a meta-eclogite from Bjé ørkedalen, west Norway. Tschermaks Mineralogische und Petrographisch. Mitteilungen, 34, 87—103 Google Scholar
Connolly, J.A.D. (1990) Multivariable phase diagrams: an algorithm based upon generalized thermodynamics. America. Journal of Science, 290, 666—718 Google Scholar
Dörsam, G., Liebscher, A., Wunder, B., Franz, G. and Gottschalk, M. (2007) Crystal chemistry of synthetic Ca2Al3Si3O12OH-Sr2Al3Si3O12OH solid-solution series of zoisite and clinozoisite. America. Mineralogist, 92, 1133—1147 CrossRefGoogle Scholar
Grapes, R. and Watanabe, T. (1984) Al-Fe3+ and Ca-Sr2+ epidotes in metagreywacke-quartzofeldspathic schist, Southern Alps, New Zealand. America. Mineralogist, 69, 490—498 Google Scholar
Green, E., Holland, T. and Powell, R. (2007) An orderdisorder model for omphacitic pyroxenes in the system jadeite-diopside-hedenbergite-acmite, with applications to eclogitic rocks. America. Mineralogist, 92, 1181—1189 CrossRefGoogle Scholar
Hada, S., Ishii, K., Landis, C.A., Aitchison, J. and Yoshikura, S. (2001) Kurosegawa terrane in southwest Japan: disrupted remnants of a Gondwanaderived terrane. Gondwana Research, 4, 27—38 CrossRefGoogle Scholar
Harlow, G.E. (1994) Jadeitites, albitites and related rocks from the Motadua Fault Zone, Guatemala. Journal of Metamorphic Geology, 12, 49—68.CrossRefGoogle Scholar
Holland, T.J.B. and Powell, R. (1998) An internally consistent thermodynamic data set for phases of petrological interest. Journal of Metamorphi. Geology, 16, 309—343 Google Scholar
Karakida, Y., Oshima, T. and Miyachi, S. (1977) Kurosegawa tectonic belt and Chichi belt in Kyusyu, southern west Japan. Pp. 165-177 in: Sambagawa Belt (K. Hide, editor), Hiroshima University Press, Hiroshima.Japan, [in Japanese with English abstract].Google Scholar
Klein, E.M. (2003) Geochemistry of the Igneous Oceanic Crust. Pp. 433-463. in: The Crust, volume 3, Treatise on Geochemistry (R.L. Rudnick, editor). Elsevier-Pergamon, Oxford.UK.Google Scholar
Leake, B.E., Woolley, A.R., Arps, C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., Kisch, H.J., Krivovichev, V.G., Linthout, K., Laird, J., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C., Smith, D.C., Stephenson, N.C.N., Ungaretti, L., Whittaker, E.J.W. and Guo, Y. (1997) Nomenclature of amphiboles; report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadia. Mineralogist, 35, 219—246 Google Scholar
Minagawa, T., Hujishima, H., Nishio-Hamane, D. and Miura, H. (2008) Epidote-(Sr), CaSrAl2Fe3+(Si2O7) (SiO4)(OH), a new mineral from the Ananai mine, Kochi Prefecture, Japan. Journal of Mineralogical and Petrologica. Sciences, 103, 400—406 Google Scholar
Miyajima, H., Matsubara, S., Miyawaki, R. and Ito, K. (1999) Itoigawaite, a new mineral, the Sr analogue of lawsonite, in jadeitite from the Itoigawa-Ohmi district, central Japan. Mineralogica. Magazine, 63, 909—916 Google Scholar
Miyajima, H., Matsubara, S., Miyawaki, R. and Hirokawa, K. (2003) Niigataite, CaSrAl3(Si2O7) (SiO4)O(OH): Sr-analogue of clinozoisite, a new member of the epidote group from the Itoigawa- Ohmi district, Niigata Prefecture, central Japan. Journal of Mineralogical and Petrologica. Sciences, 98, 118—129 Google Scholar
Miyazoe, T., Nishiyama, T., Uyeta, K., Miyazaki, K. and Mori, Y. (2009) Coexistence of pyroxenes jadeite, omphacite, and diopside/hedenbergite in an albite omphacite rock from a serpentinite mélange in the Kurosegawa Zone of Central Kyushu, Japan. American Mineralogist, 94, 34—40.CrossRefGoogle Scholar
Mori, Y. and Mashima, H. (2005) X-ray fluorescence analysis of major and trace elements in silicate rocks using 1:5 dilution glass beads. Bulletin of Kitakyushu Museum of Natural History and Human History, Series A, 3, 1—12 Google Scholar
Morishita, T., Arai, S. and Ishida, Y. (2007) Trace element compositions of jadeite (+ omphacite) in jadeitites from the Itoigawa-Ohmi district, Japan; implications for fluid processes in subduction zones. Island Arc, 16, 40—56 CrossRefGoogle Scholar
Nagasaki, A. and Enami, M. (1998) Sr-bearing zoisite and epidote in ultra high-pressure (UHP) metamorphic rocks from the Su-Lu province, eastern China: an important Sr-reservoir under UHP conditions. American Mineralogist, 83, 240—247 CrossRefGoogle Scholar
Nishiyama, T. (1990) CO2-metasomatism of a metabasite block in a serpentine melange from the Nishisonogi metamorphic rocks, Southwest Japan. Contributions to Mineralogy and Petrology, 104, 35—46.CrossRefGoogle Scholar
Ordón˜ez-Calderón, J.C., Polat, A., Fryer, B.J., Gagnon, J.E., Raith, J.G. and Appel, P.W.U. (2008) Evidence for HFSE and REE mobility during calc-silicate metasomatism, Mesoarchean (approximately 3075 Ma) Ivisaartoq greenstone belt, southern West Greenland. Precambrian Research, 161, 317—340 CrossRefGoogle Scholar
Osanai, Y., Hamamoto, T., Kagami, H., Owada, M., Douyama, D. and Ando, T. (2000) Protolith and Sm-Nd geochronology of garnet-clinopyroxene granulite and garnet-amphibolite from the Kurosegawa Belt in Kyushu, southwest Japan. Memoirs of Geological Society of Japan, 56, 199—212.[in Japanese with English abstract].Google Scholar
Saito, M., Miyazaki, K., Toshimitu, S. and Hoshizumi, H. (2005) Geology of the Tomochi district. Quadrangle Series, 1: 50,000. Geological Survey of Japan (AIST), Japan, 218 pp., [in Japanese with English abstract].Google Scholar
Scambelluri, M., Fiebig, J., Malaspina, N., Muntener, O. and Pettke, T. (2004) Serpentinite subduction: implications for fluid processes and trace-element recycling. International Geolog. Review, 46, 595—613 Google Scholar
Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185—187 CrossRefGoogle Scholar