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Contributions to Mineralogy and Petrology

, Volume 120, Issue 3–4, pp 223–248 | Cite as

P-T history of a mantle diapir: the Horoman peridotite complex, Hokkaido, northern Japan

  • K. Ozawa
  • N. Takahashi
Article

Abstract

The Horoman peridotite complex, Hokkaido, Japan is divided into Lower and Upper zones on the basis of contrasting geological features. The complex recorded a consecutive decompression history in chemical zoning of pyroxenes and plagioclase in plagioclase lherzolite, which is interpreted to have been derived from garnet lherzolite by subsolidus decompression reactions. In the Lower Zone, and earlier decompression history is clearly preserved in large pyroxene porphyroclasts, which show marked M-shaped Al zoning characterized by low Al concentration at the core (Al=0.12/6 oxygens), gradual increase toward the marginal region, and rapid decrease toward the rim. The Ca content in the core is nearly constant (Ca=0.03/6 oxygens) with slight increase toward the margin followed by abrupt decrease toward the rim. The Al and Ca contents in the core of orthopyroxene in plagioclase lherzolite from the Upper Zone (Al=0.22, Ca=0.055/6 oxygens) are much higher than those for the Lower Zone, and the Al content typically decreases monotonously from the core to the rim with several exceptions that show poorly developed M-shaped zoning profiles. The earliest P-T conditions, inferable from the core compositions of pyroxenes are 900–950°C and ∼20 kbar for the Lower Zone and 1100–1150°C and ∼20 kbar for the Upper Zone. The increase of Al from the core to the margin is inferred to have resulted from nearly adiabatic decompression from these conditions into spinel peridotite facies. The complex experienced further decompression from the spinel stability field into the plagioclase stability field, which is inferred from plagioclase zoning in fine-grained aggregates composed mostly of plagioclase, chromite spinel, and olivine with minor pyroxenes. The Na-Ca ratio of each plagioclase grain decreases from the core to the rim, suggesting continuous decompression reaction producing olivine and plagioclase from pyroxenes and spinel. The sharp increase in Ca content toward the rim indicates that fairly rapid cooling associated with decompression is necessary to form and preserve the marked zoning. The sharp decrease in Al and Ca contents toward the rim of orthopyroxene was also formed during this final ascent of the complex. The systematic changes of the mineralogic and petrographic features that are gradational between the Lower and Upper zones suggest that the Horoman complex retains a temperature variation from the upper mantle. The Upper Zone is interpreted to have followed a higher temperature decompression path than the Lower Zone and probably represents a relatively hotter portion of a mantle diapir ascending from a depth greater than 60 km in the upper mantle.

Keywords

Olivine Chromite Lower Zone Spinel Peridotite Garnet Lherzolite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Arai S (1987) An estimation of the least depleted spinel peridotite on the basis of olivine-spinel mantle array. Neues Jahrb Mineral Monatsh 8:347–354Google Scholar
  2. Arita K, Shingu H, Itaya T (1993) K-Ar geochronological constraints on tectonics and exhumation of the Hidaka metamorphic belt, Hokkaido, northern Japan. J Mineral Petrol Econ Geol 88:101–113Google Scholar
  3. Bence AE, Albee AL (1968) Empirical correction factors for the electron microanalysis of silicates and oxides. J Geol 76:382–403Google Scholar
  4. Boudier F, Nicolas A (1972) Fusion partielle gabbroique dans la lherzolite de Lanzo (Alpes Piémontaises). Bull Suisse Minral Petrol 52:39–56Google Scholar
  5. Boudier F, Nicolas A (1977) Structural controls on partial melting in the Lanzo peridotites. Oregon Dep Geol Miner Ind 96:63–78Google Scholar
  6. Boyd FR, England JL (1964) The system enstatite-pyrope. Carnegie Inst Washington Yearb 63:157–161Google Scholar
  7. Carslaw HS, Jaeger JC (1959) Conduction of Heat in Solids. Oxford University Press, New YorkGoogle Scholar
  8. Carswell DA (1968) Possible primary upper mantle peridotite in Norwegian basal gneiss. Lithos 1:322–335Google Scholar
  9. Cawthorn RG (1975) Degress of melting in mantle diapirs and the origin of ultrabasic liquids. Earth Planet Sci Lett 27:113–120Google Scholar
  10. Frey FA, Shimizu N, Leinbach A, Obata M, Takazawa E (1991) Compositional variation within the lower layered zone of the Horoman peridotile Hokkaido, Japan: constraints on models for melt-segregation. J Petrol Spec Lherzolite Issue: 211–227Google Scholar
  11. Gasparik T (1987) Orthopyroxene thermobarometry in simple and complex systems. Contrib Mineral Petrol 96:357–370Google Scholar
  12. Gasparik T (1990) A thermodynamic model for the enstatite-diopside join. Am Mineral 75:1080–1091Google Scholar
  13. Green DH (1973) Experimental melting studies on a model upper mantle composition at high pressure under water-saturated and water-undersaturated conditions. Earth Planet Sci Lett 19:37–53Google Scholar
  14. Green DH, Hibberson W (1970) The instability of plagioclase in peridotite at high pressure. Lithos 3:209–221Google Scholar
  15. Green DH, Ringwood AE (1967) The genesis of basaltic magmas. Contrib Mineral Petrol 15:103–190Google Scholar
  16. Green HW, Burnley PC (1988) Pyroxene-spinel symplectites: origin by decomposition of garnet confirmed. Am Geophys Union EOS 69:1514Google Scholar
  17. Henjes-Kunst F, Altherr R (1992) Metamorphic petrology of xenoliths from Kenya and northern Tanzania and implications for geotherms and lithospheric structures. J Petrol 33:1125–1156Google Scholar
  18. Hoogerduijn Strating EH, Rampone E, Piccardo GB, Drury MR, Vissers RLM (1993) Subsolidus emplacement of mantle peridotites during incipient oceanic rifting and opening of the Mesozoic Tethys (Voltri Massif, NW Italy). J Petrol 34:901–927Google Scholar
  19. Imai A, Ozawa K (1991) Tectonic implications of the hydrated garnet peridotites near Mt. Kinabalu, Sabah, East Malaysia. J S Asian Earth Sci 6:431–445Google Scholar
  20. Komatsu M, Nochi M (1966) Ultrabasic rocks in the Hidaka metamorphic belt, Hokkaido, Japan. I. Mode of occurrence of the Horoman ultrabasic rocks. Chikyukagaku (Earth Sci) 87:21–29Google Scholar
  21. Komatsu M, Miyashita S, Maeda J, Osanai Y, Toyoshima T (1983) Disclosing of a deepest section of continental-type crust upthrust as the final event of collision of arcs in Hokkaido, northern Japan. In: Hashimoto M, Uyeda S (eds) Accretion tectonics in the Circum-Pacific regions. Terra Sci Publ., Tokyo, pp 149–165Google Scholar
  22. Komatsu M, Shibakusa H, Miyashita S, Ishizuka H, Osanai Y, Sakakibara M (1992) Subduction and collision related high and low P/T metamorphic belts in Hokkaido. 29th Int Geol Congress Field Trip CO1 Guide Book 55Google Scholar
  23. Kornprobst J (1969) Le massif ultrabasique des Beni Bouchera (Rif. Interne, Maroc). Contrib Mineral Petrol 23:283–322Google Scholar
  24. Kushiro I, Yoder HS (1966) Anorthite-forsterite and anorthiteenstatite reactions and their bearing on the basalt-eclogite transformation. J Petrol 7:337–362Google Scholar
  25. Kushiro I, Syono Y, Akimoto S (1968) Melting of a peridotite nodule at high pressures and high water pressures. J Geophys Res 73:6023–6029Google Scholar
  26. Lasaga AC (1983) Geospeedometry: an extension of geothermometry. In: Saxena SK (ed) Kinetics and equilibrium in mineral reactions. Springer Verlag, Berlin Heidelberg New York, pp 81–114Google Scholar
  27. Lindsley DH (1983) Pyroxene thermometry. Am Mineral 68:477–493Google Scholar
  28. MacGregor ID (1974) The system MgO-Al2O3-SiO2: solubility of Al2O3 in enstatite for spinel and garnet peridotite compositions. Am Mineral 59:110–119Google Scholar
  29. McKenzie D, Bickle MJ (1988) The volume and composition of melt generated by extension of the lithosphere. J Petrol 29:625–679Google Scholar
  30. Mercier JC, Nicolas A (1975) Textures and fabrics of upper mantle peridotites as illustrated by basalt xenoliths. J Petrol 16:454–487Google Scholar
  31. Millholen GL, Irving AJ, Wyllie PJ (1974) Melting interval of peridotite with 5.7 per cent water to 30 kilobars. J Geol 82:575–587Google Scholar
  32. Miyashita S, Maeda J (1978) The basic plutonic and metamorphic rocks from the northern Hidaka Metamorphic Belt, Hokkaido. Monogr Prog Assoc Geol Collaboration Jpn 21:43–60Google Scholar
  33. Nagasaki H (1966) A layered ultrabasic complex at Horoman, Hokkaido, Japan. J Fac Sci Univ Tokyo Sect II 16:313–346Google Scholar
  34. Nakamura Y, Kushiro I (1970) Compositional relations of coexisting orthopyroxene, pigeonite and augite in a tholeiitic andesite from Hakone volcano. Contrib Mineral Petrol 26:265–275Google Scholar
  35. Nehru CE (1976) Pressure dependence of the enstatite limb of the enstatite-diopside solvus. Am Mineral 61:578–581Google Scholar
  36. Nickel KG, Green DH (1985) Empirical geothermobarometry for garnet peridotites and implications for the nature of the lithosphere, kimberlites and diamonds. Earth Planet Sci Lett 73:158–170Google Scholar
  37. Niida K (1974) Structure of the Horoman ultramafic massif of the Hidaka metamorphic belt in Hokkaido, Japan. J Geol Soc Jpn 80:31–44Google Scholar
  38. Niida K (1975) Textures and olivine fabrics of the Horoman ultramafic rocks, Japan. J Mineral Petrol Econ Geol 70:265–285Google Scholar
  39. Niida K (1984) Petrology of the Horoman ultramafic rocks in the Hidaka metamorphic belt, Hokkaido, Japan. J Fac Sci Hokkaido Univ, Ser IV 21:197–250Google Scholar
  40. Obata M (1980) The Ronda peridotite: garnet-, spinel-, and plagioclase-lherzolite facies and the P-T trajectories of a high-temperature mantle intrusion. J Petrol 21:533–572Google Scholar
  41. Obata M, Nagahara N (1987) Layering of Alpine-type peridotite and the segregation of partial melt in the upper mantle. J Geophys Res 92:3467–3474Google Scholar
  42. O'Neill HSC (1981) The transition between spinel lherzolite and garnet lerzolite, and its use as a geobarometer. Contrib Mineral Petrol 77:185–194Google Scholar
  43. Osanai Y, Arita K, Bamba M (1986) P-T conditions of granulite-facies rocks from the Hidaka metamorphic belt, Hokkaido, Japan. J Geol Soc Jpn 92:793–808Google Scholar
  44. Osanai Y, Komatsu M, Owada M (1991) Metamorphism and granite genesis in the Hidaka Metamorphic Belt, Hokkaido, Japan. J Metamorphic Geol 9:111–124Google Scholar
  45. Oxburgh ER (1980) Heat flow and magma genesis. In: Hargraves RB (ed) Physics of magmatic processes. Princeton University Press, Princeton, pp 161–199Google Scholar
  46. Piccardo GB, Rampone E, Vannucci R, Shimizu N, Ottolini L, Bottazzi P (1993) Mantle processes in the sub-continental lithosphere: the case study of the rifted sp-lherzolites from Zabargad (Red Sea). Eur J Mineral 5:1039–1056Google Scholar
  47. Quick JE (1981) Petrology and petrogenesis of the Trinity peridotite, an upper mantle diapir in the eastern Klamath Mountains, northern California. J Geophys Res 86: 11837–11863Google Scholar
  48. Ramberg H (1971) Temperature changes associated with adiabatic decompression in geologic processes. Nature 234:539–540Google Scholar
  49. Ramberg H (1972) Mantle diapirism and its tectonic and magmagenetic consequences. Phys Earth Planet Inter 5:45–60Google Scholar
  50. Rampone E, Piccardo GB, Vannucci R, Bottazzi P, Ottolini L (1993) Subsolidus reactions monitored by trace element partitioning: the spinel- to plagioclase-facies transition in mantle peridotites. Contrib Mineral Petrol 115:1–17Google Scholar
  51. Saeki K, Shiba M, Itaya T (1991) K-Ar ages of metamorphic and igneous rocks from the southern Hidaka metamorphic belt. J Mineral Petrol Econ Geol 86:177–178Google Scholar
  52. Shibata K, Uchiumi S, Uto K, Nakagawa T (1984) K-Ar age results 2. New data from the Geological Survey of Japan. Bull Geol Surv Jpn 35:331–340Google Scholar
  53. Smith D, Barron BR (1991) Pyroxene-garnet equilibration during cooling in the mantle. Am Mineral 76:1950–1963Google Scholar
  54. Takahashi E, Kushiro I (1986) Melting of a dry peridotite at high pressure and basalt magma genesis. Am Mineral 68:859–879Google Scholar
  55. Takahashi N (1991a) Evolutional history of the uppermost mantle of an arc system: petrology of the Horoman peridotite massif, Japan. In: Peters T, Nicolas A, Coleman RG (eds) Ophiolite genesis and evolution of the oceanic lithosphere. Proc Ophiolite Conf Muscat Oman January 1990. Kluwer Academic Publishers, Dordrecht, pp 195–205Google Scholar
  56. Takahashi N (1991b) Origin of three peridotite suites from Horoman peridotite complex, Hokkaido, Japan: melting, melt segregation and solidification processes in the upper mantle. J Mineral Petrol Econ Geol 86:199–215Google Scholar
  57. Takahashi N (1992) Evidence for melt segregation towards fractures in the Horoman mantle peridotite complex. Nature 359:52–55Google Scholar
  58. Takahashi N, Arai S (1989) Textural and chemical features of chromian spinel pyroxene symplectites in the Horoman peridotites, Hokkaido, Japan, Sci Rep Inst Geosci Univ Tsukuba Sect B 10:45–55Google Scholar
  59. Takazawa E, Frey FA, Obata M, Bodinier J-L (1992) Geochemical evidence for melt migration and reaction in the upper mantle. Nature 359:55–58Google Scholar
  60. Takazawa E, Shimizu N, Frey FA (1993) Compositional zoning in clinopyroxenes from the Horoman layered ultramafic complex Japan. Am Geophys Union EOS 74:682Google Scholar
  61. Tazaki K, Ito E, Komatsu M (1972) Experimental study on a pyroxene-spinel symplectite at high pressures and temperatures. J Geol Soc Jpn 78:347–354Google Scholar
  62. Vannucci R, Shimizu N, Piccardo GB, Ottolini L, Bottazzi P (1993) Distribution of trace elements during breakdown of mantle garnet: an example from Zabargad. Contrib Mineral Petrol 113:437–449Google Scholar
  63. Vissers RLM, Drury MR, Hoogerduijn Strating EH, van der Wal D (1991) Shear zones in the upper mantle: a case study in an Alpine lherzolite massil. Geology 19:990–993Google Scholar
  64. Wells PRA (1977) Pyroxene thermometry in simple and complex systems. Contrib Mineral Petrol 62:129–139Google Scholar
  65. Wood BJ, Banno S (1973) Garnet-orthopyroxene and orthopyroxene-clinopyroxene relationships in simple and complex systems. Contrib Mineral Petrol 42:109–124Google Scholar
  66. Yoshikawa M, Nakamura E, Takahashi N (1993) Rb-Sr isotope systematics in a phlogopite-bearing spinel lherzolite and its implications for age and origin of metasomatism in the Horoman peridotite complex, Hokkaido, Japan. J Mineral Petrol Econ Geol 88:121–130Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • K. Ozawa
    • 1
  • N. Takahashi
    • 1
  1. 1.Geological Institute, Faculty of ScienceUniversity of TokyoTokyoJapan

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