Advertisement

Contributions to Mineralogy and Petrology

, Volume 101, Issue 2, pp 165–175 | Cite as

Formation and compositional variation of phlogopites in the Horoman peridotite complex, Hokkaido, northern Japan: implications for origin and fractionation of metasomatic fluids in the upper mantle

  • Shoji Arai
  • Natsuko Takahashi
Article

Abstract

Harzburgite and lherzolite tectonites from the Horoman peridotite complex, Hokkaido, northern Japan, contain variable amounts of secondary phlogopite and amphibole. Phlogopite-rich veinlets parallel to the foliation planes usually cut olivine-rich parts of the rocks; single-grained interstitial phlogopites are usually associated with orthopyroxene grains. Amphiboles are disseminated in rocks or sometimes occur in the phlogopite-rich veinlets. Within individual veinlets, phlogopites show extensive inter-grain variations in K/(K + Na) ratio (0.96–0.75), generally decreasing from the central (usually the thickest) part towards the marginal parts of veinlets. In contrast, Ti contents are nearly constant in Ti-poor veins or decrease slightly with decreasing K/(K + Na) in T-rich veins. Variation of Ti in phlogopites is very large (0.1–6.8 wt%) and is inversely correlated with Mg/(Mg + Fe*) (Fe*, total iron) atomic ratios, which vary from 0.96 to 0.88. Intra-vein variation of phlogopite chemistry (especially K/(K + Na) ratio) could be achieved by in situ fractional crystallization of trapped fluids; variation of Ti, however, cannot be explained by in situ fractionation of the fluids, indicating various Ti contents of the parent fluids. It is suggested that fluids responsible for the formation of the Horoman phlogopites and amphiboles were magmatic volatiles successively released from evolving alkali basaltic magmas. Individual fluids trapped within peridotites were fractionated, precipitating phlogopites successively poorer in K. When the fluids became rich enough in Na, amphiboles co-precipitated with phlogopites. Similar fractional crystallization of phlogopites and amphiboles is expected in the upper mantle on a larger scale if fluids move upwards. This process may control, at least partly, a lateral K/Na distribution in the upper mantle; K and Na may be concentrated in deeper and shallower parts, respectively.

Keywords

Iron Fractionation Mineral Resource Atomic Ratio Fractional Crystallization 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aoki K (1975) Origin of phlogopite and potassic richterite bearing peridotite xenoliths from South Africa. Contrib Mineral Petrol 53:145–156CrossRefGoogle Scholar
  2. Aoki K, Shiba I (1973) Pargasites in lherzolite and websterite inclusions from Itinome-gata, Japan. J Jpn Assoc Mineral Petrol Econ Geol 68:303–310Google Scholar
  3. Arai S (1984) Pressure-temperature dependent compositional variation of phlogopitic micas in upper mantle peridotites. Contrib Mineral Petrol 87:260–264CrossRefGoogle Scholar
  4. Arai S (1986) K/Na variation in phlogopite and amphibole of upper mantle peridotites due to fractionation of the metasomatizing fluids. J Geol 94:436–444Google Scholar
  5. Arai S (1987) An estimation of the least depleted spinel peridotite on the basis of olivine-spinel mantle array. Neues Jahrb Miner Mh 1987, pp 347–354Google Scholar
  6. Arai S, Takahashi N (1986) Petrographical notes on deep-seated and related rocks. 4. Highly refractory peridotites from Horoman ultramafic complex, Hokkaido, Japan. Ann Rep Inst Geosci Univ Tsukuba 12:76–78Google Scholar
  7. Arai S, Takahashi N (1987) Phlogopites in the solid intrusive peridotites: their modes of occurrence and chemical characteristicts. Sci Rep Inst Geosci Univ Tsukuba Sec B 8:75–92Google Scholar
  8. Baker I (1969) Petrology of the volcanic rocks of Saint Helena Island, South Atlantic. Bull Geol Soc Am 80:1283–1310Google Scholar
  9. Basaltic Volcanism Study Project (1981) Basaltic volcanism on the terrestrial planets. Pergamon, New YorkGoogle Scholar
  10. Bence AE, Albee AL (1968) Empirical correction factors for the electron microanalysis of silicates and oxides. J Geol 76:382–403Google Scholar
  11. Bonatti E, Ottonello G, Hamlyn PR (1986) Peridotites from the Island of Zabargad (St. John), Red Sea: petrology and geochemistry. J Geophys Res 91:559–631Google Scholar
  12. Carswell DA (1975) Primary and secondary phlogopites and clinopyroxenes in garnet lherzolite xenoliths. Phys Chem Earth 9:417–429CrossRefGoogle Scholar
  13. Cawthorn RG (1975) The amphibole peridotite-metagabbro complex. Finero, northern Italy. J Geol 83:437–454Google Scholar
  14. Dawson JB, Smith JV (1977) The MARID (mica-amphibole-rutileilmenite-diopside) suite of xenoliths in kimberlite. Geochim Cosmochim Acta 41:309–323CrossRefGoogle Scholar
  15. Delaney JS, Smith JV, Carswell DA, Dawson JB (1980) Chemistry of micas from kimberlites and xenoliths. II. Primary- and secondary-textured micas from peridotite xenoliths. Geochim Cosmochim Acta 44:857–872CrossRefGoogle Scholar
  16. Ehrenberg SN (1982) Petrogenesis of garnet lherzolite and megacrystalline nodules from the Thumb, Navajo volcanic field. J Petrol 23:507–547Google Scholar
  17. Erlank AJ, Rickard RS (1977) Potassic richterite bearing peridotites from kimberlite and the evidence they provide for upper mantle metasomatism. 2nd Int Kimberlite Conf, Santa FeGoogle Scholar
  18. Ernst WG (1978) Petrochemical study of Iherzolite rocks from the Western Alps. Ibid 19:341–392Google Scholar
  19. Exley RA, Sills JD, u Smith JV (1982) Geochemistry of mica from the Finero spinel-lherzolite, Italian Alps. Contrib Mineral Petrol 81:59–63CrossRefGoogle Scholar
  20. Harte B, Gurney JJ (1975) Ore mineral and phlogopite mineralization within ultramafic nodules from the Matsoku kimberlite pipe, Lesotho. Carnegie Inst Wash Yearbook 74:528–536Google Scholar
  21. Harte B, Cox KG, Gurney JJ (1975) Petrography and geological history of upper mantle xenoliths from the Matsoku kimberlite pipe. Phys Chem Earth 9:477–506Google Scholar
  22. Hawthorne FC (1981) Crystal chemistry of the amphiboles. In: Veblen DR (ed) Ambiboles and other hydrous pyriboles — mineralogy. Reviews in Mineralogy 9A. Mineral Soc Am, pp 1–102Google Scholar
  23. Hirai H, Arai S (1987) H2O-CO2 fluids supplied to alpine-type mantle peridotites; electron petrology of relic fluid inclusions in olivines. Earth Planet Sci Lett 85:311–318CrossRefGoogle Scholar
  24. Jolivet L (1986) A tectonic model for the evolution of the Hokkaido Central Belt: late Jurassic collision of the Okhotsk with Eurasia. Monogr Assoc Geol Collab Japan 31:355–377Google Scholar
  25. Jolivet L, Miyashita S (1985) The Hidaka Shear Zone (Hokkaido, Japan): genesis during a right-lateral strike-slip movement. Tectonics 4:289–302Google Scholar
  26. Komatsu M (1975) Recrystallization of the high alumina pyroxene peridotite of the Uenzaru area in Hidaka province, Hokkaido, Japan. J Geol Soc Japan 81:11–28Google Scholar
  27. Komatsu M (1986) Tectonics of the Hidaka metamorphic belt (in Japanese with English abstract). Monogr Assoc Geol Collab Japan 31:441–450Google Scholar
  28. Komatsu M, Miyashita S, Arita K (1986) Composition and structure of the Hidaka metamorphic belt, Hokkaido — historical review and present status (in Japanese with English abstract). Monogr Assoc Collab Japan 31:189–203Google Scholar
  29. Le Roex AP (1985) Geochemistry, mineralogy and magmatic evolution of the basaltic and trachytic lavas from Gough Island. South Atlantic. J Petrol 26:149–186Google Scholar
  30. Macdonald GA, Katsura T (1964) Chemical composition of Hawaiian lavas. J Petrol 5:82–133Google Scholar
  31. Nagasaki H (1966) A layered ultrabasic complex at Horoman. Hokkaido, Japan. J Fac Sci Univ Tokyo 16:313–346Google Scholar
  32. Nakamura Y, Kushiro I (1970) Composition of the gas phase in Mg2SiO4-SiO2-H2 at 15 kbar. Carnegie Inst Wash Yearbook 73:255–258Google Scholar
  33. Nicolas A, Jackson M (1982) High temperature dikes in peridotites: origin by hydraulic fracturing. J Petrol 23:568–582Google Scholar
  34. Niida K (1974) Structure of the Horoman ultramafic mass of the Hidaka metamorphic belt in Hokkaido, Japan. J Geol Soc Japan 80:31–44Google Scholar
  35. Niida K (1975a) Texture of olivine fabrics and the Horoman ultramafic rocks, Japan. J Jpn Assoc Mineral Petrol Econ Geol 70:265–285Google Scholar
  36. Niida K (1975b) Phlogopite from the Horoman ultramafic rocks. J Fac Sci Hokkaido Univ Ser IV 16:511–518Google Scholar
  37. 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
  38. Niida K, Katoh T (1978) Ultramafic rocks in Hokkaido (in Japanese with English abstract). Monogr Assoc Geol Collab Japan 21:61–81Google Scholar
  39. Obata M, Nagahara N (1987) Layering of alpine-type peridotite and the seggregation of partial melt in the upper mantle. J Geophys Res 92:3467–3474Google Scholar
  40. Osanai Y, Miyashita S, Arita K, Bamba M (1986) The metamorphism and thermal structure of the collisional terrain of continental and oceanic crusts: a case of the Hidaka metamorphic belt, Hokkaido, Japan (in Japanese with English abstract). Monogr Assoc Geol Collab Japan 31:205–222Google Scholar
  41. Research Group of Peridotite Intrustion (1967) Ultrabasic rocks in Japan. J Geol Soc Japan 73:543–553Google Scholar
  42. Roden MF, Murthy VM (1985) Mantle metasomatism. Ann Rev Earth Planet Sci 13:269–296Google Scholar
  43. Roden MK, Hart SR, Frey FA, Melson WG (1984) Sr, Nd and Pb isotopic and REE geochemistry of St. Paul's Rocks: the metamorphic and metasomatic development of an alkali basalt mantle source. Contrib Mineral Petrol 85:376–390CrossRefGoogle Scholar
  44. Schneider ME, Eggler DH (1981) Fluids in equilibrium with peridotite minerals: implications for mantle metasomatism. Geochim Cosmochim Acta 50:711–724Google Scholar
  45. Shibata K, Ishihara S (1981) K-Ar ages of granitic rocks of the Hidaka belt, Hokkaido, Japan (in Japanese). Abstract, 88th Ann Meet Geol Soc Japan 342Google Scholar
  46. Shibata K, Uchiumi S, Uto K, Nakagawa T (1984) K-Ar age results -2- new data from the Geological Survey of Japan (in Japanese with English abstract). Bull Geol Surv Jpn 35:331–340Google Scholar
  47. Sinton JM (1979) Ultramafic inclusions and high-pressure xenocrysts in submarine basanitoid, equatorial mid-Atlantic ridge. Contrib Mineral Petrol 70:49–57CrossRefGoogle Scholar
  48. Takahashi E (1978) Petrologic model of the crust and upper mantle of the Japanese island arcs. Bull Volcanol 41:529–547Google Scholar
  49. Takahashi E (1986) Genesis of calc-alkaline andesite magma in hydrous mantle-crust boundary: petrology of lherzolite xenoliths from the Ichinomegata crater, Oga Peninsula, northeast Japan, part II. J Volcan Geotherm Res 29:355–395Google Scholar
  50. Takahashi N (1986) Mantle metasomatism in the Horoman ultramafic mass, Hokkaido. Graduation thesis, Univ Tsukuba (in Japanese with English abstract)Google Scholar
  51. Takahashi N (1988) The Horoman peridotite mass, the Hidaka Belt, Hokkaido, northern Japan: a complex of three kinds of peridotite suites. MSc thesis, Univ TsukubaGoogle Scholar
  52. Vogt P (1962) Geologisch-petrographische Untersuchungen im Peridotitstock von Finero. Schweiz Mineral Petrogr Mitt 42:59–125Google Scholar
  53. Volfinger M (1976) Effect de la température sur les distributions de Na, Rb et Cs entre la sanidine, la muscovite, la phlogopite et une sulution hydrothermale sous une pression de 1 kbar. Geochim Cosmochim Acta 40:267–282CrossRefGoogle Scholar
  54. Wells PRA (1977) Pyroxene thermometry in simple and complex systems. Contrib Mineral Petrol 62:129–139CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • Shoji Arai
    • 1
  • Natsuko Takahashi
    • 1
  1. 1.Institute of GeoscienceThe University of TsukubaIbarakiJapan

Personalised recommendations