CHEN Jun-bing, ZENG Zhi-gang. PETROLOGY AND MINERALOGY OF PERIDOTITES FROM THE SOUTHERN MARIANA FOREARC: IMPLICATION FOR THE METASOMATISM OF THE MANTLE WEDGE UNDER MARIANA ARC[J]. Marine Geology & Quaternary Geology, 2007, 27(1): 53-59.
Citation: CHEN Jun-bing, ZENG Zhi-gang. PETROLOGY AND MINERALOGY OF PERIDOTITES FROM THE SOUTHERN MARIANA FOREARC: IMPLICATION FOR THE METASOMATISM OF THE MANTLE WEDGE UNDER MARIANA ARC[J]. Marine Geology & Quaternary Geology, 2007, 27(1): 53-59.
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PETROLOGY AND MINERALOGY OF PERIDOTITES FROM THE SOUTHERN MARIANA FOREARC: IMPLICATION FOR THE METASOMATISM OF THE MANTLE WEDGE UNDER MARIANA ARC

  • 1 Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

  • 2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China

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  • Received Date: July 07, 2006
  • Revised Date: December 08, 2006
    Graphical Abstract
    • Abstract
  • Peridotites from the southern Mariana forearc are described and the mineral compositions analyzed by EPMA. Amphibole which generally falls into Magnesiohornblende and Tremolite is common in these peridotites and the abundance of Al2O3 ranges from 0 wt% to 10 wt%. Composition of spinel in these peridotites is closely related to amphibole:the occurrence of amphibole rich in Al2O3 is always accompanied by enrichment of Al and depletion of Cr in spinel,and the occurrence of amphibole poor in Al2O3 by enrichment of Fe3+ and depletion of Al. These indicate there were two stages of hydrous metasomatism in mantle wedge under the Mariana arc:(1)Hydrous fluid (melt) enriched in Al and Ca reacted with mantle wedge under high pressure and temperature, resulting in the consumption of orthopyroxene and the occurrence of amphibole with high Al2O3 to lead to enrichment of Al and depletion of Cr in spinel; (2) Hydrous fluid (melt) enriched in Ca continually reacted with mantle wedge in low pressure and temperature conditions and changed the residual orthopyroxene into amphibole with low Al2O3 to lead to the enrichment of Fe3+ and depletion of Al in spinel.
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    • References (15)
  • [1]
    Tatsumi Y. The subduction factory:How it operates in the evolving Earth[J]. GSA Today, 2005,15:4-10.
    [2]
    Kepezhinskas P, Defant M J,Drummond M S.Na metasomatism in the island-arc mantle by slab melt-peridotite interaction; evidence from mantle xenoliths in the North Kamchatka Arc[J]. Journal of Petrology,1995, 36:1505-1527.
    [3]
    Kepezhinskas P, Defant M J,Drummond M S. Progressive enrichment of island arc mantle by melt peridotite interaction inferred from Kamchatka xenoliths[J]. Geochimica et Cosmochimica. Acta, 1996,60:1217-1229.
    [4]
    Parkinson I J,Pearce J A. Peridotites from the Izu-Bonin-Mariana Forearc (ODP Leg 125):Evidence for mantle melting and melt-mantle interaction in a supra-subduction zone setting[J]. Journal of Petrology, 1998,39:1577-1618.
    [5]
    Abe N, Arai S,Yurimoto H. Geochemical characteristics of the uppermost mantle beneath the Japan island arcs:implications for upper mantle evolution[J]. Physics of the Earth and Planetary Interiors, 1998,107:233-248.
    [6]
    McInnes B I A, Gregoire M, Binns R A, et al. Hydrous metasomatism of oceanic sub-arc mantle, Lihir, Papua New Guinea:petrology and geochemistry of metasomatised mantle wwedge xenoliths[J]. Earth and Planetary Science Letters, 2001,188:169-183.
    [7]
    Gregoire M, McInnes B I A,O'Reilly S Y. Hydrous metasomatism of oceanic sub-arc mantle, Lihir, Papua New Guinea Part 2. Trace element characteristics of slab-derived fluids[J]. Lithos.,2001, 59:91-108.
    [8]
    Ishii T, Robinson P T, Maekawa H,et al. Petrological studies of peridotites from diapiric serpentinite seamounts in the Izu-Ogasawara-Mariana forearc, Leg 125[R]//Proceedings of the Ocean Drilling Program:Scientific Results, College Station, TX, USA. 1992,125:445-486.
    [9]
    Ohara Y,Ishii T. Peridotites from the southern Mariana forearc:Heterogeneous fluid supply in mantle wedge[J]. The Island Arc, 1998,7:541-558.
    [10]
    Stern R J, Fouch M J,Klemperer S L. An overview of the Izu-Bonin-Mariana subduction factory[C]//Inside the Subduction Factory, American Geophysical Union, Washington D C,2003:175-222.
    [11]
    Yamazaki T,Murakami F. Asymmetric rifting of the northern Mariana Trough[J]. The Island Arc,1998, 7:460-470.
    [12]
    Fryer P, Saboda K L, Johnson L E, et al. Conical seamount:SeaMARC, Alvin submersible and seismic-reflection studies[R]//Proceedings of the Ocean Drilling Program, Initial Reports, College Station, TX, USA,1990,125:69-80.
    [13]
    Girardeau J,Lagabrielle Y. Deformation history of peridotites from Mariana forearc, Conical Seamount, Leg 125[R]//Proceedings of the Ocean Drilling Program:Scientific Results, College Station, T X,1990, 125:519-534.
    [14]
    Leake B E, Woolet A R, Arps C E S,et al.Nomenclature of Amphiboles:Report of the Subcommittee of the International Mineralogical Association, Commission on New Minerals and Mineral Names[J]. American Mineralogist, 1997,35:219-246.
    [15]
    Ernst W G,Liu J.Experimental phase-equilibrium study of Al-and Ti-contents of calcic amphibole in MORB——A semiquantitative thermobarometer[J]. American Mineralogist,1998, 83:952-969.
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