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Azimi A, Nabatian G, Honarmand M, Ebrahimi M, Songjian A. Geochemistry and origin of Gheshlagh peridotites and chromites, Khoy ophiolitic complex, northwest of Iran. www.ijcm.ir 2025; 33 (1) :47-62
URL: http://ijcm.ir/article-1-1912-en.html
URL: http://ijcm.ir/article-1-1912-en.html
1- Department of geology, Faculty of sciences, University of Zanjan, Zanjan, Iran
2- Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
3- Institute of geology and Geophysics, Chinese Academy of Sciences, Beijing, China
2- Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
3- Institute of geology and Geophysics, Chinese Academy of Sciences, Beijing, China
Abstract: (582 Views)
The Khoy ophiolitic complex in NW Iran is a part of the Neo-Tethyan ophilite belt and contain several chromite mineralization such as Gheshlagh deposit. The Gheshalgh chromites occurred in the serpantinized dunites and harzburgites and display various thickness and geometries such lenzoid and textures include massive, dessiminated, leopard, vein-veinlets and breccia. Chromite associated with ferro-chromite and low amounts of sulfide minerals occurred as the most important mineral in the Gheshlagh deposit. The chemistry of Gheshlagh chromite show low Cr#, high Mg#, high Al2O3 and low TiO2 value. The geochemical data from the harzburgites and dunites in the Ghashlagh deposits show low values of SiO2, Al2O3, and CaO suggesting high depletion of these elements in the studied samples. The rare earth elements pattern in the Gheshalgh chromite are similar to those from the peridotite host rocks and show U-shape pattern. The geochemical data suggest the relationship of chromites and host harzburgites and dunites with abyssal peridotite and up to 20% partial melting degree as well interaction with subduction derived melts and fluids. Thus, the tectonic setting of the Gheshlagh ophiolitic complex is more likely imply to a back-arc setting.
References
1. [1] Coleman R.G., "Pre-accretion tectonics and metamorphism of ophiolites". Ofioliti 9 (1984) 205-222.
2. [2] Shafaii Moghadam H., Stern R. J., "Ophiolites of Iran: Keys to understanding the tectonic evolution of SWAsia: (II) Mesozoic ophiolites". Journal of Asian Earth Sciences 100 (2015) 31-59. DOI: http://dx.doi.org/10.1016/j.jseaes.2014.12.016 [DOI:10.1016/j.jseaes.2014.12.016]
3. [3] Khalatbari M., Juteau T., Bellon H., whitechurch H., Cotton J., Emami H., "Discovery of two ophiolitic complex of different ages in the Khoy area (NW Iran)". Geodyamics 335 (2003) 917-929. DOI: 10.1016/S1631-0713(03)00123-8 [DOI:10.1016/S1631-0713(03)00123-8]
4. [4] Hassanipak A.A., Mohamad Ghazi A., "Petrology, geochemistry and tectonite setting of the Khoy ophiolite, North West Iran: implication for Tethyan tectonics". Journal of Asian Earth Science Elsevier 18 (2000) 109- 121. DOI: 10.1016/S1367-9120(99)00023-1 [DOI:10.1016/S1367-9120(99)00023-1]
5. [5] Kananian A., Ataei M., Mirmohammadi M., Emamalipour A., "Petrography, mineral chemistry and genesis of Aland and Gheshlagh Chromite deposits, Khoy ophiolite (NW of Iran) (in Persian)". Iranian Journal of Crystallography and Mineralogy 18(3) (2010) 369-380.
6. [6] Radfar J., Amini B., Bahroudi A., Khalatbari M., Emami M.H., Bahremand M., "Geological map of Khoy". Geological survey of Iran, Tehran, Iran.
7. [7] Nabavi M.H., "An Introduction to Geology of Iran (in Persian)". Geological survey of Iran, Tehran, Iran (1976).
8. [8] Stocklin J., "Structural correlation of the Alpine range between Iran and Central Asia". Memoire Hors-Serve No.8 dela Societe Geologique de France 8 (1977) 333-353.
9. [9] Azizi H., Moinvaziri H., Mohajjel M., Yagobpoor A., "PTt path in metamorphic
10. rocks of the Khoy region (northwest Iran) and their tectonic significance for cretaceoustertiary continental collision". Journal of Asian Earth Sciences 27 (2006) 1-9. DOI: 10.1016/j.jseaes.2004.12.007 [DOI:10.1016/j.jseaes.2004.12.007]
11. [10] Azizi H., Chung S.L., 'Tanaka T., Asahara Y., "Isotopic dating of the Khoy metamorphic complex (KMC), northwestern Iran: A significant revision of the formation age and magma source". Precambrian Research 185 (2011) 87-94. [DOI:10.1016/j.precamres.2010.12.004]
12. [11] Khalatbari J.M., Juteau T., Cotton J., "Petrological and geochemical study of the Late Cretaceous ophiolite of Khoy (NW Iran), and related geological formations". Journal of Asian Earth Science 27 (2006) 465-502. DOI: 10.1016/j.jseaes.2005.05.006 [DOI:10.1016/j.jseaes.2005.05.006]
13. [12] Ghazi A.M., Pessagno E.A., Hassanipak A.A., Kariminia S.M., Duncan R.A., Babaie H.A., "Biostratigraphic zonation and 40Ar/39Ar ages for the Neo-Tethyan Khoy ophiolite of NW Iran". Palaeogeography, Palaeoclimatology, Palaeoecology 193 (2003) 311-323. DOI: 10.1016/S0031-0182(03)00234-7 [DOI:10.1016/S0031-0182(03)00234-7]
14. [13] Malekghasemi F., Karimzadeh-Somarin A.K., "Petrology and origin of chromite mineralization in the Khoy area". Berg und Huttenmannische Monatshefte 10 (2005) 358-366. DOI: [DOI:10.1007/BF03166826]
15. [14] Imamalipour A., "Metallogeny of Khoy ophiolite with special regard to sulfide deposits
16. associated with the volcanic rocks of Qezildash area". Doctoral dissertation, Ph.D. Thesis,
17. University of Shahid Beheshti, Tehran, Iran, pp. 359 (in Persian) (2001)
18. [15] Imamalipour A., "Mineralogy of accessory and rare minerals associated with chromite deposits in the Khoy area. (in Persian)". Iranian Journal of Crystallography and Mineralogy, 16(4) (2009) 559-570.
19. [16] Monsef I.M., Rahgoshay M., Mohajjel M., Moghadam H.S., "Peridotites from the Khoy Ophiolitic Complex, NW Iran: Evidence of mantle dynamics in a supra-subduction-zone context". Journal of Asian Earth Science 38 (2010) 105-120. DOI: 10.1016/j.jseaes.2009.10.007 [DOI:10.1016/j.jseaes.2009.10.007]
20. [17] Zaeimnia F., Kananian A., Arai A., Mirmohammadi M., Imamalipour A., Zaki Khedr M., Makoto Miura M., Abbou-Kebir K., "Mineral chemistry and petrogenesis of chromitites from the Khoy ophiolite complex, Northwestern Iran: Implications for aggregation of two ophiolites." Island Arc 26(6) (2017) 1-15. DOI: 10.1111/iar.12211 [DOI:10.1111/iar.12211]
21. [18] Whitney D.L., Evans B.W., "Abbreviations for names of rock-forming minerals". American Mineralogist 95 (2010), 185-187. DOI: 10.2138/am.2010.3371 [DOI:10.2138/am.2010.3371]
22. [19] Melcher F., Grum W., Simon G., Thalhammer T.V., Stumfl F., "Petrogenesis of the ophiolitic giant chromite deposits of Kempirisai Kazakhstan A study of solid and fluid inclusions in chromite". Journal of Petrology 38 (1997) 1419-1458. DOI: 10.1093/petrology/38.10.1419 [DOI:10.1093/petrology/38.10.1419]
23. [20] Zaccarini F., Pushkarev E., Garuti G., "Plutinum-group element mineralogy and geochemistry of chromitite of the Kluchevskoyophiolite complex central Urals (Russia)". Ore geology Reviews 33 (2001) 20-30. DOI:10.1016/j.oregeorev.2006.05.007 [DOI:10.1016/j.oregeorev.2006.05.007]
24. [21] Bridges J.C., Prichard H.M., Meireles C.A.,"Podiform Chromite-Bearing Ultramafic Rocks from the Bragança Massif, Northern Portugal: Fragments of Island Arc Mantle". Geological Magazine 132 (1995) 39-49. [DOI:10.1017/S0016756800011419]
25. [22] Büchl A., Brügmann G., Batanova V.G., "Formation of podiform chromitite deposits:implications from PGE abundances and Os isotopic compositions of chromites from the Troodos complex, Cyprus". Chemical Geology 208 (2004) 217-232. [DOI:10.1016/j.chemgeo.2004.04.013]
26. [23] Kamenetsky VS., Crawford AJ., 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(4) (2001) 655-671. [DOI:10.1093/petrology/42.4.655]
27. [24] Tamura A., Arai S., "Harzburgite-dunite-orthopyroxenite suite as a record of suprasubduction zone setting for the Oman ophiolite mantle". Lithos 90 (2006) 43-56. DOI:10.1016/j.lithos.2005.12.012 [DOI:10.1016/j.lithos.2005.12.012]
28. [25] Morishita T., Tani K., Shukuno H., Harigane Y., Tamura A., Kumagai H., Hellebrand E., "Diversity of melt conduits in the Izu-Bonin-Mariana forearc mantle: Implications for the earliest stage of arc magmatism". Geology 39 (2011) 411-414. DOI: 10.1130/g31706.1 [DOI:10.1130/G31706.1]
29. [26] Zhou M.F., Robinson P.T., Bai W.j., "Formation of podiform chromitites by melt rock interaction in the upper mantle". Minerlium Deposita 29 (1994) 98-101. DOI: [DOI:10.1007/BF03326400]
30. [27] McDonough W.F., Sun S.S., "The composition of the Earth". Chemical Geology 120 (1995) 223-253. DOI: 10.1016/0009-2541(94)00140-4 [DOI:10.1016/0009-2541(94)00140-4]
31. [28] Kelemen B., Shimizu N., Dunn T., "Relative depletion of niobium in some arc magmas and the continental crust: partitioning of K, Nb, La and Ce during melt rock reaction in the upper mantle". Earth and Planetary Science Letters 120 (1993) 111-134. [DOI:10.1016/0012-821X(93)90234-Z]
32. [29] Kinzler R.J., "Melting of mantle peridotite at pressures approaching the spinel to garnet transition: application to mid-ocean ridge basalt petrogenesis". Journal of Geophysical Research 102 (1997) 853-874. DOI:10.1029/96JB00988 [DOI:10.1029/96JB00988]
33. [30] Pagé P., Barnes S.J., "Using trace elements in chromites to constrain the origin of podiform chromitites in the Thetford Mines ophiolite, Québec,Canada". Economic Geology 104 (2009) 997-1018. [DOI:10.2113/econgeo.104.7.997]
34. [31] Barnes S.J, Roeder P. L., "The range of spinel compositions in terrestrial mafic and ultramafic rocks". Journal of Petrology 42 (2001) 2279-2302. [DOI:10.1093/petrology/42.12.2279]
35. [32] Zhang P.F., Zhou M.F., Malpas J., Robinson P.T., "Origin of high-Cr chromite deposits in nascent mantle wedges: Petrological and geochemical constraints from the Neo-Tethyan Luobusa ophiolite, Tibet". Ore Geology Reviews 123 (2020) 103-581.
https://doi.org/10.1016/j.oregeorev.2020.103581 [DOI:10.17632/n8zjdr6dbg.1]
36. [33] González-Jiménez J.M., Augé T., Gervilla F., Bailly L., Proenza J.A., Griffin B., "Mineralogy and geochemistry of platinum-rich chromitites from the mantle-crust transition zone at Ouen Island, New Caledonia ophiolite". Canadian Mineralogist, 49(6) (2011) 1549-1570.
https://doi.org/10.3749/canmin.49.6.1549 [DOI:10.3749/canmin.49.6.1549.]
37. [34] Colás V., González J.M., Griffin W.L., Fanlo I., Gervilla F.O., Reilly S.Y., Pearson, N.J., Kerestedjian T., Proenza J.A., "Fingerprints of metamorphism in chromite: new insights from minor and trace elements". Chemical Geology 389 (2014) 137-152. [DOI:10.1016/j.chemgeo.2014.10.001]
38. [35] Yao S., "Chemical composition of chromites from ultramafic rocks", application to mineral exploration and petrogenesis. (PhD thesis) Macquarie University, Sydney (174 pp.) (1999).
39. [36] Üner T., "Supra‑subduction zone mantle peridotites in the Tethyan Ocean (East Anatolian Accretionary Complex-Eastern Turkey): Petrological evidence for melting and melt‑rock interaction". Mineralogy and Petrology 115(6) (2021) 663-685.
https://doi.org/10.1007/s00710-021-00760-0 [DOI:10.1007/s00710-021-00760-0.]
40. [37] Niu Y., "Mantle melting and melt extraction processes beneath ocean ridges: Evidence from abyssal peridotites". Journal of Petrology 38 (1997) 1047−1074. [DOI:10.1093/petroj/38.8.1047]
41. [38] Parkinson I.J., Pearce J.A., "Peridotites from the Izu-Bonin-Mariana forearc (ODP Leg 125): Evidence for mantle melting and meltmantle interaction in a supra-subduction zone setting". Journal of Petrology 39(9) (1998) 1577-1618. [DOI:10.1093/petroj/39.9.1577]
42. [39] Proenza J. A., Gervilla F., Melgarejo J. C., Bodinier J. L., "Al- and Cr-rich chromitites from the Mayarí-Baracoa Ophiolitic Belt (Eastern Cuba): consequence of interaction between volatile-rich melts and peridotites in suprasubduction mantle". Economic Geology 94 (1999) 547-566. [DOI:10.2113/gsecongeo.94.4.547]
43. [40] Khalatbari J.M., Juteau T., Bellon H., Whitechurch H., Cotton J., Emami M.H., "New geological, geochronological and geochemical investigation on the Khoy ophiolites and related formations, NW Iran". Journal of Asian Earth Science 23 (2004) 507-535. DOI:10.1016/j.jseaes.2003.07.005. [DOI:10.1016/j.jseaes.2003.07.005]
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