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Comparison of PGE concentration in the chromitites of Khoy Ophiolite: Its implication for the presence of two types of chromitites with two different origins. www.ijcm.ir 2018; 26 (2) :273-286
URL: http://ijcm.ir/article-1-1097-en.html
Abstract:   (3104 Views)
Khoy ophiolitic complex in northwest of Iran have several chromitite bodies with various textures, different geochemical features and associated minerals. Based on Cr#, Khoy chromitites are divided into two groups: high-Cr (Cr# > 0.6) and high-Al (Cr# < 0.6) chromitites. The high-Cr contain some amount of PGEs with tiny grains of platinum-group minerals (PGM), whereas, high-Al chromitites are poor in PGE with no PGM inclusions. Geochemical analysis and Raman spectroscopy data on PGM inclusions in the high-Cr chromian spinels shows that they are laurite and rarely irarsite in composition. The PGE concentration in high-Cr- and high-Al chromitite reveals that the high-Cr chromitites probably were formed in a magmatic arc tectonic setting and those of high-Al were occurred in a back arc basin environment.
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1. [1] Ahmed H.A., Arai S., "Unexpectedly high-PGE chromitite from the deeper mantle section of the northern Oman ophiolite and its tectonic implications", Contribution to Mineralogy and Petrology 143 (2002) 263–78. [DOI:10.1007/s00410-002-0347-8]
2. [2] Economou-Eliopoulos M., "Platinum-group element distribution in chromite ores from ophiolite complexes: implications for their exploration" Ore Geology Reviews 11 (1996) 363 -381. [DOI:10.1016/S0169-1368(96)00008-X]
3. [3] Uysal I., Tarkian M., Sadiklar M.B., Zaccarini F., Meisel T., Garuti G., Heidrich S., "Petrology of Al- and Cr-rich ophiolitic chromitites from the Muğla, SW Turkey: implications from composition of chromite, solid inclusions of platinum-group mineral, silicate, and base-metal mineral, and Os-isotope geochemistry" Contribution to Mineralogy and Petrology 158 (2009) 659–674. [DOI:10.1007/s00410-009-0402-9]
4. [4] Miura M., Arai S., Mizukami T.," Raman spectroscopy of hydrous inclusions in olivine and orthopyroxene in ophiolitic harzburgite: Implications for elementary processes in serpentinization." Journal of Mineralogical and Petrological Sciences 106 (2011) 91-96. [DOI:10.2465/jmps.101021d]
5. [5] Akmaz R.M., Uysal I., Saka S., "Compositional variations of chromite and solid inclusions in ophiolitic chromitites from the southeastern Turkey: Implications for chromitite genesis" Ore Geology Reviews 58 (2014) 208-24. [DOI:10.1016/j.oregeorev.2013.11.007]
6. [6] Mernagh T. P., Hoatson D. M., "A Laser-Raman microprobe study of platinum-group minerals from the Munni Munni layered intrusion, West Pilbara Block, Western Australia" The Canadian Mineralogist 33 (1995) 409–417.
7. [7] Kananian A., Ataei M., Mirmohammadi M., Emamalipour A., "Petrography, mineral chemistry and genesis of Aland and Gheshlagh chromite deposits, Khoy ophiolite (NW of Iran)", Iranian Journal of Crystallography and Mineralogy 18 (2010) 369-380.
8. [8] Azimzadeh M., Zaccarini F., Moayyed M., Garuti G., Thalhammer O.A.R., Uysal I. Mirmohammadi M., "Magmatic and post-magmatic significance of chromitite and associated platinum-group minerals (PGM) in the eastern Khoy ophiolitic complex (NW Iran)" Ofioliti 36 (2011) 157-73.
9. [9] Emamalipour A., "Mineralogy of accessory and rare minerals associated with chromite deposits in the khoy area", Iranian Journal of Crystallography and Mineralogy 16 (2009) 559-570.
10. [10] Hassanipak A., Ghazi M., "Petrology, geochemistry and tectonic setting of the Khoy ophiolite, northwest Iran: implications for Tethyan tectonics" Journal of Asian Earth Sciences 18 (2000) 109–121. [DOI:10.1016/S1367-9120(99)00023-1]
11. [11] Shafaii Moghadam H., Stern R. J., "Ophiolites of Iran: Keys to understanding the tectonic evolution of SW Asia: (II) Mesozoic ophiolites" Journal of Asian Earth Sciences 100 (2015) 31–59. [DOI:10.1016/j.jseaes.2014.12.016]
12. [12] Khalatbari-jafari M., Juteau T., Bellon H., Emami M.H., "Discovery of two ophiolite complexes of different ages in the Khoy area (NW Iran)", Geodynamics, 335 (2003) 917–929. [DOI:10.1016/S1631-0713(03)00123-8]
13. [13] Avagyan A., Sosson M., Philip M.H., Karakhanian A., Rolland Y., Melkonyan R., Rebai S., Davtyan V., "Neogene to Quaternary stress field evolution in Lesser Caucasus and adjacent regions using fault kinematics analysis and volcanic cluster data" Geodinamica Acta 18 (2005) 401–416. [DOI:10.3166/ga.18.401-416]
14. [14] Arai S., Ishimaru S., "Insights into petrological characteristics of the lithosphere of mantle wedge beneath arcs through peridotite xenoliths: a review" Journal of Petrology 49 (2008) 665–695. [DOI:10.1093/petrology/egm069]
15. [15] Arai S., Okamura H., Kadoshima K., Tanaka C., Suzuki K., Ishimaru S., "Chemical characteristics of chromian spinel in plutonic rocks: implications for deep magma processes and discrimination of tectonic setting" Island Arc 20 (2011) 125–137. [DOI:10.1111/j.1440-1738.2010.00747.x]
16. [16] Arai S., "Compositional variation of olivine–chromian spinel in Mg-rich magmas as a guide to their residual spinel peridotites" Journal of Volcanology and Geothermal Research 59 (1994) 279–293. [DOI:10.1016/0377-0273(94)90083-3]
17. [17] Dick H.J.B., Bullen T., "Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas" Contribution to Mineralogy and Petrology 86 (1984) 54–76. [DOI:10.1007/BF00373711]
18. [18] González-Jiménez J.M., Griffin W.L., Gervilla F., Proenza J.A., O'Reilly S.Y., Pearson N.J., "Chromitites in ophiolites: how, where, when, why? Part I. A review and new ideas on the origin and significance of platinum-group minerals" Lithos 189 (2014) 127–139. [DOI:10.1016/j.lithos.2013.06.016]
19. [19] Rajabzadeh M.A., Moosavinasab Z., "Mineralogy and distribution of Platinum-Group Minerals (PGM) and other solid inclusions in the Neyriz ophiolitic chromitites, Southern Iran" The Canadian Mineralogist 50 (2012) 643-665. [DOI:10.3749/canmin.50.3.643]
20. [20] Rajabzadeh M.A., Moosavinasab Z., "Mineralogy and distribution of Platinum-Group Minerals (PGM) and other solid inclusions in the Faryab ophiolitic chromitites, Southern Iran" Mineralogy and Petrology 107 (2013) 943-962. [DOI:10.1007/s00710-012-0265-z]
21. [21] Ahmed A.H., "Diversity of platinum-group minerals in podiform chromitites of the late Proterozoic ophiolite, Eastern Desert, Egypt: genetic implications" Ore Geology Reviews 32 (2007) 1–19. [DOI:10.1016/j.oregeorev.2006.05.008]
22. [22] Uysal I., "Platinum-group minerals (PGM) and other solid inclusions in the Elbistan- Kahramanmaraş, mantle-hosted ophiolitic chromitites, south-eastern Turkey: their petrogenetic significance" Turkish Journal of Earth Sciences 17 (2005) 729–740.
23. [23] Prichard H.M., Neary C.R., Fisher F.C., O'Hara M.J., "PGE-rich podiform chromitites in the Al'Ays ophiolite complex, Saudi Arabia: an example of critical mantle melting to extract and concentrate PGE" Economic Geology 103 (2008) 1507–1529. [DOI:10.2113/gsecongeo.103.7.1507]
24. [24] Zhou M.F., Sun M., Keays R.R., Kerrich R., "Controls on platinum-group elemental distributions of podiform chromitites, a case study of high-Cr and high-Al chromitites from Chinese orogenic belts" Geochimical et Cosmochimica Acta 62 (1998) 677–688. [DOI:10.1016/S0016-7037(97)00382-7]
25. [25] Mao H.K., Hemley R.J., Chao E.C.T., "The application of micro-Raman spectroscopy to analysis and identification of minerals in thin section" Scanning Microscopy 1 (1987) 495–501.
26. [26] Merrnagh T. P., Trudu A. G., "A laser Raman microprobe study of some geologically important sulphide minerals" Chemical geology 103 (1993) 113-127. [DOI:10.1016/0009-2541(93)90295-T]
27. [27] Zaccarini F., Bakker R. J., Garuti G., Aiglsperger T., Thalhammer O. A. R., Campos L., Proenza J. A., Lewis J. F., "Platinum group minerals in chromitite bodies of the Santa Elena Nappe, Costa Rica: mineralogical characterization by electron microprobe and Raman-spectroscopy" Boletín de la Sociedad Geológica Mexicana 62 (2010) 161-171. [DOI:10.18268/BSGM2010v62n1a9]
28. [28] González-Jiménez J.M., Proenza J.A., Gervilla F., Melgarejo J.C., Blanco-Moreno J.A., Ruiz- Sánchez R., Griffin W.L., "High-Cr and high-Al chromitites from the Sagua de Tánamo district, Mayarí-Cristal Ophiolitic Massif (eastern Cuba): constraints on their origin from mineralogy and geochemistry of chromian spinel and platinum group elements." Lithos 125 (2011) 101–121. [DOI:10.1016/j.lithos.2011.01.016]
29. [29] Uysal I., Sadiklar M. B., Tarkian M., Karsli O., Aydin F., "Mineralogy and composition of the chromitites and their platinum-group minerals from Ortaca (Mugla-SW Turkey): evidence for ophiolitic chromitite genesis" Mineralogy and petrology 83 (2005) 219-242. [DOI:10.1007/s00710-004-0063-3]
30. [30] Najafzadeh A. R., Ahmadipour H., "Using platinum-group elements and Au geochemistry to constrain the genesis of podiform chromitites and associated peridotites from the Soghan mafic–ultramafic complex, Kerman, Southeastern Iran" Ore Geology Reviews 60 (2014) 60–75. [DOI:10.1016/j.oregeorev.2013.12.014]
31. [31] Chen G., Xia B., "Platinum- group elemental geochemistry of mafic and ultramafic rocks from the Xigaze ophiolite, southern Tibet" Journal of Asian Earth Sciences 32 (2008) 406-422. [DOI:10.1016/j.jseaes.2007.11.009]
32. [32] Zaccarini F., Bakker R.J., Garuti G., Thalhammer O.A.R., Proenza J.A., Aiglsperger T., "Raman spectroscopy applied to rare and tiny phases: example from the study of platinum group minerals (PGM)" Conference on Micro-Raman Spectroscopy and Luminescence Studies in the Earth and Planetary Sciences (CORALS II), Madrid (Spain), May 18–20, (2011) 82.
33. [33] Hoatson D.M., Keays R.R., "Formation of platiniferous sulfide horizons by crystal fractionation and magma mixing in the Munni Munni layered intrusion, West Pilbara Block, Western Australia" Economic Geology 84 (1989) 1775–1804. [DOI:10.2113/gsecongeo.84.7.1775]
34. [34] Allahyari K., Saccani E., Pourmoafi M., Beccaluva L., Masoudi F., "Petrology of mantle peridotites and intrusive mafic rocks from the Kermanshah ophiolitic complex (Zagros belt, Iran): implications for the geodynamic evolution of the Neo-Tethyan oceanic branch between Arabia and Iran" Ofioliti 35 (2010) 71–90.
35. [35] Rajabzadeh M.A., Nazari Dehkordi T., "Investigation on mantle peridotites from Neyriz ophiolite, South of Iran: geodynamic signals" Arabian Journal of Geosciences 6 (2013) 4445-4461. [DOI:10.1007/s12517-012-0687-2]
36. [36] Shafaii Moghadam H.S., Khedr M.Z., Arai S., Stern R.J., Ghorbani G., Tamura A., Ottley C.J., "Arc-related harzburgite–dunite–chromitite complexes in the mantle section of the Sabzevar ophiolite, Iran: a model for formation of podiform chromitites" Gondwana Research 27 (2015) 575–593. [DOI:10.1016/j.gr.2013.09.007]
37. [37] Arai S., Kadoshima K., Morishita T., "Widespread arc-related melting in the mantle section of the northern Oman ophiolite as inferred from detrital chromian spinels" Journal of the Geological Society, London 163 (2006) 869–879. [DOI:10.1144/0016-76492005-057]

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