Application of chromite composition as a petrological indicator for determination of the Dehsheikh ultramafic complex origin (south of Kerman Province, Iran)

Abstract

Chromite is one of the important mineral in all lithologies of the Dehsheikh ultramafic complex (South of Baft, Kerman Province) with different shapes and abundances. In the Dehsheikh harzburgites, this mineral present with two distinct generations. The first generation is refractory with variable Cr# values (between 46.2 to 60%) and contains low Al2O3 content (between 21 to 44.4 wt%). The second generation, as interstitial phase, is more Cr depleted and enriched in Al2O3 than the first one. Chemical composition of chromites from the Dehsheikh lherzolites is more similar to the second-type chromites of the Dehsheikh harzburgites. In the Dehsheikh irregular dunites, there are different shapes of chromites. The first group is chemically similar to those of the Dehsheikh chromitites, while the composition of second group is close to the harzburgitic refractory chromites. Cr-spinel in the Dehsheikh chromitties is characterized by high Cr# values (between 69 to 79) and in genetic diagram shows boninitic affinity. In TiO2 vs. Al2O3 wt% discrimination diagram, the Dehsheikh chromites plot in suprasubduction zone field. Olivine-spinel geothermometry calculations on the Dehsheikh peridotites indicate subsolidus equilibrium temperatures (930 to 1080°C) for these rocks, while oxygen fugacity estimations yield values varing from +1.53 for the Dehsheikh lherzolites to +3.94 for irregular dunites. These values can be found in suprasubduction zone settings. In general, a suprasubduction zone with aqueous fluids derived from subducted oceanic slab is responsible for the formation of the Dehsheikh depleted peridotites and associated chromitites.

Keywords


[1] Irvine T. N., "Chromian spinel as a petrogenetic indicator", Part I. Theory, Canadian Journal of Earth Science 2 (1965) 648–672.

[2] Irvine T. N., "Chromian spinel as a petrogenetic indicator", Part II. Petrological applications, Canadian Journal of Earth Science 4 (1967) 71–103.

[3] Arai S., "Chemistry of chromian spinel in volcanic rock as a potential guide to magma chemistry", Mineralogical Magazine 56 (1992) 173–184.

[4] Jackson E.D., “Chemical variation in coexisting chromite and olivine in chromitite zones of the Stillwater Complex”, Economic Geology, Mono-Series 4 (1969) 41 –71.

[5] Evans B. W., Frost B. R., “Chrome spinel in progressive metamorphism: a preliminary analysis”, Geochimica et Cosmichimica Acta 39 (1975) 959-972.

[6] Dick H. J. B., Bullen T., “Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas”, Contributions to Mineralogy and Petrology 86 (1984) 54–76.

[7] Arai S., “Characterization of spinel peridotites by olivine-spinel compositional relationship: review and interpretation”, Chemical Geology 113 (1994) 191–204.

[8] Sabzehei M., Berberian M., Alavi-Tehrani N., Houshman Zadeh A., Nougole-Sadat M.A.A., Madjidi B., “Geological quadrangle map of Iran, Geological survey of Iran, No”, (1994) 112.

[9] Dilek Y., Delaloye M., “Structure of the Kızılda ophiolite, a slow-spread Cretaceous ridge segment north of the Arabian promontory”, Geology 20 (1992) 19–22.

[10] Hassanipak A.A., Ghazi A.M., “Petrology, geochemistry and tectonic setting of the Khoy ophiolite, Northwest Iran”, Journal of Asian Earth Science 18 (1999) 43–55.

[11] McCall G.J.H., “Explanatory text of the Minab Quadrangle Map 1:250,000”, No. J13, Geological Survey of Iran, Tehran (1985) 530.

[12] Shahabpour J., “Tectonic evolution of the orogenic belt in the region located between Kerman and Neyriz”, Journal of Asian Earth Science 24 (2005) 405–417.

[13] Pagé P., Bédard J.H., Schroetter J.-M., Tremblay A., “Mantle Petrology and Mineralogy of the Thetford Mines Ophiolite Complex”, Lithos 100 (2008) 255–292.

[14] Stevens R.E., “Composition of some chromites of the western Hemisphere”, American Mineralogist 29 (1994) 1–34.

[15] Zhou M.-F., “PGE distribution in 27-Ga layered komatiite flows from the Belingwe greenstone belt, Zimbabwe”, Chemical Geology 118 (1994) 155–172.

[16] Robinson P.T, Zhou M.F, Malpas J., Bai W. J., “Podiform chromitites: their composition, origin and tectonic setting”, Episodes 20 (1997) 247–252.

[17] Bloomer S.H., Hawkins J.W., “Gabbroic and ultramafic rocks from the Mariana trench: an island arc ophiolite”, In: Hayes, D.E. (Ed.), The Tectonics and Geologic Evolution of Southeast Asian Seas and Islands: Part II. AGU Geophysical Monograph, 23. American Geophysical :union:, Washington (1983) 294–317.

[18] Bloomer S.H., Fisher R.L., “Petrology and geochemistry of igneous rocks from the Tonga Trench – a non-accreting plate boundary”, Journal of Geology 95 (1987) 469–495.

[19] Ishii T., Robinson P.T., Maekawa H., Fiske R., “Petrological studies of peridotites from diapiric serpentinite seamounts in the Izu–Ogasawara–Mariana forearc, Leg 1251”, In: Fryer, P., Pearce, J.A., Stokking, L.B. (Eds.), Proceedings of the Ocean Drilling Program. Scientific Results 125 (1992) 445–485.

[20] 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 the supra-subduction zone setting”, Journal of Petrology 39 (1998) 1577–1618.

[21] Umino S., “Magma mixing in boninite sequence of Chichijima, Bonin island”, Journal of Volcanology and Geothermal Research 29 (1986) 125–157.

[22] van der Laan S.R., Arculus R.J., Pearce J.A., Murton J.B., “Petrography, mineral chemistry, and phase relations of the basement boninite series of Site 786, Izu–Bonin forearc”, In: Fryer, P., Pearce, J.A., Stokking, L.B. (Eds.), Proceedings of the Ocean Drilling Program, Scientific Results, vol. 125. Ocean Drilling Program, College station, TX, (1992) 171–202.

[23] Cameron W.E., “Petrology and origin of primitive lavas from Troodos ophiolite, Cyprus”, Contributions to Mineralogy and Petrology 89 (1985) 239–255.

[24] Sobolev A.V., Danyushevsky L.V., “Petrology and geochemistry of boninites form the north termination of the Tonga trench: constraints on the generation conditions of primary high-Ca boninite magmas”, Journal of Petrology 35 (1994) 1183–1211.

[25] Wan Z., Laurence A., Coogan L.A., Canil D., “Experimental calibration of aluminum partitioning between olivine and spinel as a geothermometer”, American Mineralogist 93 (2008) 1142–1147.

[26] Ballhaus C., Berry R. F., Green D.H., “High pressure experimental calibration of the olivine-orthopyroxene-spinel oxygen geobarometer: implication for the oxidation state of the upper mantle”, Contribution to Mineralogy and Petrology 107 (1991) 27-40.

[27] Parkinson I.J., Arculus R.J., “The redox state of subduction zones; insights from arc-peridotites”, Chemical Geology 160 (1999) 409–423.

[28] Dick H.J.B., “Partial melting in the Josephine peridotite I, the effect on mineral compositions and its consequence for geobarometry and geothermometry”, American Journal of Science 277 (1977) 801-832.

[29] Barnes S.J., “The distribution of chromium among orthopyroxene, spinel and silicate liquid at atmosphere pressure”, Geochimica et Cosmochimica Acta 50 (1986) 1889–1909.

[30] Auge T., “Chromite deposits in the northern Oman ophiolite: mineralogical constraints”, Mineralium Deposita 22 (1987) 1-10.

[31] Zhou M. F., Robinson P., Malpas J., Li Z., “Podiform chromites in the Luobusa ophiolite (Southern Tibet): Implications for melt–rock interaction and chromite segregation in the upper mantle”, Journal of Petrology 37 (1996) 3–21.

[32] Bedard J. H., “Petrogenesis of boninites from the Betts Cove ophiolite, Newfoundland, Canada: identification of subducted source components”, Journal of Petrology 40 (1999) 1853–1889.

[33] Kamenetsky V.S, Crawford A.J, Meffre S., “Factors controlling chemistry of magmatic spinel: an empirical study of associated olivine, Cr-spinel and melt inclusions from primitive rocks”, Journal of Petrology 42 (2001) 655–671.

[34] Crawford A.J, Falloon T.J, Green D.H., “Classification, petrogenesis and tectonic setting of boninites”, In: Crawford AJ (ed) Boninites and related rocks, Unwin Hyman, London (1989)1–49.

[35] Maurel C., Maurel P., “Étude expérimental de la distribution de l’aluminium entre bain silicate basique et spinelle chromifère. Implications pétrogenetiques: teneur en chrome des spinelles”, Bulletin de Mineralogie 105 (1982) 197–202.

[36] Bloomer S.H., Hawkinz J.W., “Petrology and geochemistry of boninite series volcanic rocks from the Mariana trench”, Contribution to Mineralogy and Petrology 97 (1987) 361-377.

[37] Pal T., Mitra S., “P-T-fO2 controls on a partly inverse chromite bearing ultramafic intrusive: an evaluation from the Sukinda Massif, India”, Journal of Asian Earth Science 22 (2004) 483–493.

[38] Mondal S. K., Ripley E. M., Li C., Frei R., "The genesis of Archaean chromitites from the Nuasahi and Sukinda massifs in the Singhbhum Craton, India”, Precambrian Research 148 (2006) 45-66.

[39] Ahmed A.H., Arai S., “Unexpectedly high-PGE chromitite from the deeper mantle section of the northern Oman ophiolite and its tectonic implications”, Contributions to Mineralogy and Petrology 143 (2002) 263–278.









[40] Pearce J.A., Barker P.F., Edwards S.J., Parkinson I.J., Leat P.T., “Geochemistry and tectonic significance of peridotites from the South Sandwich arc–basin system, South Atlantic”, Contributions to Mineralogy and Petrology 139 (2000) 36–53.

[41] Gaetani G. A., Grove T. L., “The influence of water on melting of mantle peridotite”, Contribution to Mineralogy and Petrology 131 (1998) 323-346.

[42] Ghasemi A., Talbot C. J., "A new tectonic scenario for the Sananadaj-Sirjan Zone (Iran)", Journal of Asian Earth Science 26, (2005) 683–693.