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Mineralium Deposita

, Volume 46, Issue 4, pp 409–428 | Cite as

The Kharapeh orogenic gold deposit: geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran

  • Shojaeddin Niroomand
  • Richard J. Goldfarb
  • Farid Moore
  • Mohammad Mohajjel
  • Erin E. Marsh
Article

Abstract

The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj–Sirjan Zone (SSZ) in the West Azerbaijan province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian plate during the Cretaceous–Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well as altered andesite and dacite dikes. Structural analysis indicates that the rocks underwent tight to isoclinal recumbent folding and were subsequently co-axially refolded to upright open folds during a second deformation. Late- to post-tectonic Cenozoic granites and granodiorites occur northeast of the deposit area. Mineralization mainly is recognized within NW-trending extensional structures as veins and breccia zones. Normal faults, intermediate dikes, and quartz veins, oriented subparallel to the axial surface of the Kharapeh antiform, indicate synchronous extension perpendicular to the fold axis during the second folding event. The gold-bearing quartz veins are >1 km in length and average about 6 m in width; breccia zones are 10–50 m in length and ≤1 m in width. Hydrothermal alteration mainly consists of silicification, sulfidation, chloritization, sericitization, and carbonatization. Paragenetic relationships indicate three distinct stages—replacement and silicification, brecciation and fracture filling, and cataclastic brecciation—with the latter two being gold-rich. Fluid inclusion data suggest mineral deposition at temperatures of at least 220–255°C and depths of at least 1.4–1.8 km, from a H2O–CO2±CH4 fluid of relatively high salinity (12–14 wt.% NaCl equiv.), which may reflect metamorphism of passive margin carbonate sequences. Ore fluid δ18O values between about 7‰ and 9‰ suggest no significant meteoric water input, despite gold deposition in a relatively shallow epizonal environment. Similarities to other deposits in the SSZ suggest that the deposit formed as part of a diachronous gold event during the middle to late Tertiary throughout the SSZ and during the final stages of the Zagros orogeny. The proximity of Kharapeh to the main tectonic suture of the orogen, well-developed regional fold systems with superimposed complex fracture geometries, and recognition of nearby volcanogenic massive sulfide systems that suggest a region characterized by sulfur- and metal-rich crustal rocks, collectively indicate an area of the SSZ with high favorability for undiscovered gold resources.

Keywords

Kharapeh Epizonal orogenic gold Zagros orogeny Sanandaj–Sirjan Iran 

Notes

Acknowledgments

This study was financially supported by research funds from the Geological Survey of Iran. We gratefully thank Ryan Taylor of the USGS for assistance and some laboratory analyses. Thanks are also extended to the Shiraz University research committee for various support. Dr M. Berberian is thanked for critically reading the manuscript, as well as referees Steffen Hagemann and Olivo Gema for improving an earlier version, and editor Bernd Lehmann for additional constructive comments. Final reviews by Garth Graham and Ryan Taylor are also appreciated.

References

  1. Abdollahi MJ, Karimpour MH, Kheradmand A, Zarasvandi AR (2009) Stable isotopes (O, H, and S) in the Muteh gold deposit, Golpaygan area, Iran. Nat Resour Res 18:137–151. doi: 10.1007//s11053-009-9091-3 CrossRefGoogle Scholar
  2. Agard P, Omrani J, Jolivet L, Mouthereau F (2005) Convergence history across Zagros (Iran): constraints from collisional and earlier deformation. Int J Earth Sci 94:401–419CrossRefGoogle Scholar
  3. Alavi M (1994) Tectonics of the Zagros orogenic belt of Iran: new data and interpretations. Tectonophysics 229:211–238CrossRefGoogle Scholar
  4. Alavi M (2004) Regional stratigraphy of the Zagros folded-thrust belt of Iran and its proforeland evolution. Am J Sci 304:1–20CrossRefGoogle Scholar
  5. Aliyari F (2006) Mineralogy, geochemistry and fabrics of gold mineralization in ductile to brittle shear zones of Qolqoleh deposit, southwest of Saqez, Iran. MSc thesis, Tarbiat Modares UniversityGoogle Scholar
  6. Aliyari F, Rastad E, Hou ZQ (2007) Orogenic gold mineralization in the Qolqoleh deposit, northwestern Iran. Resour Geol 57:269–282CrossRefGoogle Scholar
  7. Allen MB (2009) Discussion on the Eocene bimodal Piranshahr massif of the Sanandaj–Sirjan Zone, West Iran: a marker of the end of collision in the Zagros orogen. J Geol Soc London 166:981–982CrossRefGoogle Scholar
  8. Arvin M, Pan Y, Dargahi S, Malekizadeh A, Babaei A (2007) Petrochemistry of the Siah–Kuh granitoid stock southwest of Kerman, Iran: implications for initiation of Neotethys subduction. J Asian Earth Sci 30:474–489CrossRefGoogle Scholar
  9. Azizi H, Jahangiri A (2008) Cretaceous subduction-related volcanism in the northern Sanandaj–Sirjan Zone, Iran. J Geodyn 45:178–190CrossRefGoogle Scholar
  10. Azizi H, Moinevaziri H (2009) Review of the tectonic setting of Cretaceous to Quaternary volcanism in northwestern Iran. J Geodyn 47:167–179CrossRefGoogle Scholar
  11. Bakker RJ (1997) Clathrates: computer programs to calculate fluid inclusion V–X properties using clathrate melting temperatures. Comput Geosci 23:1–18CrossRefGoogle Scholar
  12. Bakker RJ (1999) Optimal interpretation of microthermometrical data from fluid inclusions: thermodynamic modeling and computer programming. Habilitation thesis, Ruprecht-Karls-University, Heidelberg, p 50 (in German)Google Scholar
  13. Berberian M (1995) Master blind thrust faults hidden under the Zagros folds: active basement tectonics and surface morphotectonics. Tectonophysics 241:193–224CrossRefGoogle Scholar
  14. Berberian F, Berberian M (1981) Tectono-plutonic episodes in Iran. In: Gupta HK, Delany FM (eds) Zagros–Hijndu Kush–Himalaya geodynamic evolution. American Geophysical Union, Geodynamic Series 3, pp 5–32Google Scholar
  15. Berberian M, King GCP (1981) Towards a paleogeography and tectonic evolution of Iran. Can J Earth Sci 18:210–265CrossRefGoogle Scholar
  16. Berberian F, Muir ID, Pankhurst RJ, Berberian M (1982) Late Cretaceous and early Miocene Andean-type plutonic activity in northern Makran and central Iran. J Geol Soc (Lond) 139:605–614CrossRefGoogle Scholar
  17. Besse J, Torcq F, Gallet Y, Ricou LE, Krystyn L, Saidi A (1998) Late Permian to late Triassic palaeomagnetic data from Iran: constraints on the migration of the Iranian block through the Tethyan ocean and initial destruction of Pangaea. Geophys J Int 135:77–92CrossRefGoogle Scholar
  18. Bodnar RJ (1993) Revised equation and table for determining the freezing point depression of H2O–NaCl solutions. Geochim Cosmochim Acta 57:683–684CrossRefGoogle Scholar
  19. Braud J (1987) La suture du Zagros au niveau de Kermanshah (Kurdistan Iranien): reconstitution palégéographique, évolution géodynamique, magmatique et tructurale. PhD thesis, Université de Paris-Sud, France, p 489 (in French)Google Scholar
  20. Brown PE (1989) FLINCOR: a microcomputer program for the reduction and investigation of fluid-inclusion data. Am Min 74:1390–1393Google Scholar
  21. Burke EAJ (2001) Raman microspectrometry of fluid inclusions. Lithos 55:139–158CrossRefGoogle Scholar
  22. Dercourt J, Zonenshain LP, Ricou L-E, Kazmin VG, Le Pichon X, Knipper AL, Grandjacquet C, Sbortshikov IM, Geyssant J, Lepvrier C, Pechersky DH, Boulin J, Sibuet J-C, Savostin LA, Sorokhtin O, Westphal M, Bazhenov ML, Lauer JP, Biju-Duval B (1986) Geological evolution of the Tethys belt from the Atlantic to the Pamirs since the Lias. Tectonophysics 123:241–315CrossRefGoogle Scholar
  23. Diamond LW (2003) Systematics of H2O inclusions. In: Samson I, Anderson A, Marshall D (eds) Fluid inclusions: analysis and interpretation. Mineralogical Association of Canada Short Course Series 32, pp 55–79Google Scholar
  24. Eftekhar-Nezhad J (1973) The Mahabad Quadrangle map (scale 1:250,000). Geological Survey and Mineral Exploration of Iran, TehranGoogle Scholar
  25. Eftekhar-Nezhad J (1981) Tectonic division of Iran with respect to sedimentary basins. J Iranian Petroleum Soc 82:19–28 (in Persian)Google Scholar
  26. Eftekhar-Nezhad J (2004) Exploration text of The Mahabad Quadrangle map: 1:250,000 (North Kurdestan). Geological Survey and Mineral Exploration of Iran, TehranGoogle Scholar
  27. Ghasemi A, Talbot CJ (2006) A new tectonic scenario for the Sanandaj–Sirjan Zone (Iran). J Asian Earth Sci 26:683–693CrossRefGoogle Scholar
  28. Ghazanfari M, Abbasi Z (2009b) Complementary report of detailed exploration of Ghabaghlogeh gold deposit. Internal report, Geological Survey of Iran, Tehran (in Persian)Google Scholar
  29. Ghazanfari M, Abbasi Z (2009a) Complementary report of detailed exploration of Qolqoleh gold deposit. Internal report, Geological Survey of Iran, Tehran (in Persian)Google Scholar
  30. Ghazanfari M, Fazlikhani T, Abbasi Z (2009) Complementary report of detailed exploration of Kervian gold deposit. Internal report, Geological Survey of Iran, Tehran (in Persian)Google Scholar
  31. Glennie KW (2000) Cretaceous tectonic evolution of Arabia’s eastern plate margin: a tale of two oceans. Soc Sed Geol Spec Pub 69:9–20Google Scholar
  32. Goldfarb RJ, Baker T, Dube B, Groves DI, Hart CJR, Gosselin P (2005) Distribution, character and genesis of gold deposits in metamorphic terranes. Economic Geology 100th Anniversary Volume, pp 407–450Google Scholar
  33. Groves DI, Goldfarb RJ, Gebre MM, Hagemann SG, Robert F (1998) Orogenic gold deposits: a proposed classification in the context of their crustal distribution and relationship to other gold deposit types. Ore Geol Rev 13:7–27CrossRefGoogle Scholar
  34. Heidari SM (2004) Mineralogy, geochemistry and fabrics of gold mineralization in ductile shear zones of Kervian deposit, southwest of Saqez, Iran. MS thesis, Tarbiat Modares University, IranGoogle Scholar
  35. Heidari SM, Rastad E, Mohajjel M, Shamsa SMJ (2006) Gold mineralization in ductile shear zone of Kervian (southwest of Saqez-Kordestan province). Geosciences 58:18–37 (in Persian with English abstract)Google Scholar
  36. Hollister LS (1990) Enrichment of CO2 in fluid inclusions in quartz by removal of H2O during crystal-plastic deformation. J Struct Geol 12:895–901CrossRefGoogle Scholar
  37. Holloway JR (1981) Composition and volumes of supercritical fluids in the Earth crust. In: Hollister LS, Crawford ML (eds) Fluid inclusions: applications to petrology. Mineralogical Association of Canada Short Course Handbook 6, pp 13–38Google Scholar
  38. Johnson EL, Hollister LS (1995) Syn-deformational fluid trapping in quartz: determining the pressure–temperature conditions of deformation from fluid inclusions and the formation of pure CO2 fluid inclusions during grain-boundary migration. J Meta Geol 13:239–249CrossRefGoogle Scholar
  39. Khodabandeh AA, Soltani GA (2004) The Naghadeh Sheet map (scale1: 100,000). Geological Survey and Mineral Exploration of Iran, TehranGoogle Scholar
  40. Mazhari SA, Bea F, Amini S, Ghalamghash J, Molina JF, Montero P, Scarrow JH, Williams IS (2009) The Eocene bimodal Piranshahr massif of the Sanandaj–Sirjan Zone, NW Iran: a marker of the end of the collision in the Zagros orogen. J Geol Soc 166:53–69CrossRefGoogle Scholar
  41. Mazhari SA, Amini S, Ghalamghash J, Bea F (2011) Petrogenesis of granitic unit of Naqadeh complex, Sanandaj–Sirjan Zone, NW Iran. Arab J Geosci. doi: 10.1007/s12517-009-0077-6
  42. Mohajjel M, Fergusson CL (2000) Dextral transpression in Late Cretaceous continental collision, Sanandaj–Sirjan Zone, western Iran. J Struct Geol 22:1125–1139CrossRefGoogle Scholar
  43. Mohajjel M, Fergusson CL, Sahandi MR (2003) Cretaceous–Tertiary convergence and continental collision, Sanandaj–Sirjan Zone, western Iran. J Asian Earth Sci 21:397–412CrossRefGoogle Scholar
  44. Moinevaziri H (1985) Volcanisme Tértiaire et Quatérnaire en Iran. Thèse d’ Etat, Paris-Sud Orsay, France, p 290 (in French)Google Scholar
  45. Moritz M, Ghazban F, Singer SS (2006) Eocene gold ore formation at Muteh, Sanandaj–Sirjan tectonic zone, western Iran: a result of late-stage extension and exhumation of metamorphic basement rocks within the Zagros Orogen. Econ Geol 101:1497–1524CrossRefGoogle Scholar
  46. Nezafati N, Herzig PM, Pernicka E, Momenzadeh M (2005) Intrusion-related gold occurrences in the Ashaneh–Sarband area, west central Iran. In: Mao JW, Bierlein FP (eds) Mineral deposit research—meeting the global challenge. Springer, Berlin, pp 445–448CrossRefGoogle Scholar
  47. Niroomand S (2004) Minerals exploration in geological Naghadeh sheet (1:100000 scale). Internal report, Geological Survey and Mineral Exploration of Iran, TehranGoogle Scholar
  48. Niroomand S (2011) The study of geology, mineralogy, geochemistry and genesis of Kharapeh–Zinonjian gold deposit (NW Piran- shahr–West Azarbaijan Province). PhD thesis, Shiraz University, Iran, p 402Google Scholar
  49. Nosratpoor H (2008) A study of gold mineralization in Ghabaghlojeh shear zone (southwest Saqqez, Kurdestan province). MS thesis, Tehran University, IranGoogle Scholar
  50. Omrani J (2008) The geodynamic evolution of Zagros: tectonic and petrological constraints from internal zones. PhD thesis, Universite Paris, FranceGoogle Scholar
  51. Omrani J, Agard P, Whitechurch H, Mathieu B, Prouteau G, Jolivet L (2008) Arc-magmatism and subduction history beneath the Zagros Mountains, Iran: a new report of adakites and geodynamic consequences. Lithos 106:380–398CrossRefGoogle Scholar
  52. Pearce JA, Peate DW (1995) Tectonic implications of the composition of volcanic arc magmas. Ann Rev Earth Plan Sci 23:251–285CrossRefGoogle Scholar
  53. Price NJ, Cosgrove JW (1990) Analysis of geological structures. Cambridge University Press, Cambridge, p 502Google Scholar
  54. Ramboz C, Pichavant M, Weisbrod A (1982) Fluid immiscibility in natural processes: use and misuse of fluid inclusion data. II. Interpretation of fluid inclusion data in terms of immiscibility. Chem Geol 37:29–48CrossRefGoogle Scholar
  55. Ramsay JG, Huber MI (1983) The techniques of modern structural geology. Academic, St. Louis, 307 ppGoogle Scholar
  56. Ricou LE (1994) Tethys reconstructed: plates, continental fragments and their boundaries since 260 Ma from Central America to Southeastern Asia. Geodyn Acta 7:169–218Google Scholar
  57. Ridley J, Hagemann SG (1999) Interpretation of post-entrapment fluid-inclusion re-equilibration at the Three Mile Hill, Marvel Loch and Griffins Find high-temperature lode-gold deposits, Yilgarn Block, Western Australia. Chem Geol 154:257–278CrossRefGoogle Scholar
  58. Roedder E (1984) Fluid inclusions. Rev Miner 12:644Google Scholar
  59. Sengor AMC (1990) A new model for the Late Paleozoic–Mesozoic tectonic evolution of Iran and implications for Oman. In: Robertson AHF, Searle MP, Ries AC (eds) The geology and tectonics of the Oman region. Geological Society of London Special Publications 49, pp 797–831Google Scholar
  60. Sengor AMC, Ozeren MS, Keskin M, Sakinc M, Ozbakir AD, Kayan I (2008) Eastern Turkish high plateau as a small Turkic-type orogen: implications for post-collisional crust-forming processes in Turkic-type orogens. Earth Sci Rev 90:1–48CrossRefGoogle Scholar
  61. Sheikholeslami MR, Pique A, Mobayen P, Sabzehei M, Bellon H, Hashem Emami M (2008) Tectono-metamorphic evolution of the Neyriz metamorphic complex, Quri-Kor-e-Sefid area (Sanandaj–Sirjan Zone, SW Iran). J Asian Earth Sci 31:504–521CrossRefGoogle Scholar
  62. Shepherd TJ, Rankin AH, Alderton DHM (1985) A practical guide to fluid inclusion studies. Blackie, Glasgow, p 239Google Scholar
  63. Stampfli GM, Borel GD (2002) The TRANSMED transects in space and time: constraints on the paleotectonic evolution of the Mediterranean domain. In: Cavazza W, Roure F, Spakman W, Stampfli GM, Ziegler P (eds) The TRANSMED Atlas: the Mediterranean region from crust to mantle. Springer, Berlin, pp 53–80Google Scholar
  64. Stampfli GM, Mosar J, Faver P, Pillevuit A, Vannay CJ (2001) Permo-Mesozoic evolution of the western Tethyan realm: the Neo-Tethys/East-Mediterranean connection. Pre-Tethyan memoir 6: Pre-Tethyanrift/wrench basins and passive margins. Int Geol Correl Prog 369:51–108Google Scholar
  65. Sterner SM, Bodnar RJ (1984) Synthetic fluid inclusions in natural quartz. I. Compositional types synthesized and applications to experimental geochemistry. Geochim Cosmochim Acta 48:2659–2668CrossRefGoogle Scholar
  66. Tajeddin H, Drri M, Niroomand S (2004) Gold mineralization in Barika sheared zone (East of Sardasht, western Azarbaijan). 22nd Geoscience Symposium, Geological Survey of IranGoogle Scholar
  67. Tajeddin H, Shamsa MJ, Abadian N, Niroomand S (2006) Gold mineralization styles in Saqqez–Piranshahr area. 24th Geoscience Symposium, Geological Survey of IranGoogle Scholar
  68. Takin M (1972) Iranian geology and continental drift in the Middle East. Nature 23:147–150CrossRefGoogle Scholar
  69. Touret J, Dietvorst P (1983) Fluid inclusions in high-grade anatectic metamorphites. J Geol Soc (Lond) 140:635–649CrossRefGoogle Scholar
  70. Yarmohammadi A (2006) Mineralogy, geochemistry, structure, texture and genesis of gold (Ag, base metals and barite) in Barika mineral area (east of Sardasht), Iran. MS thesis, Tarbiat Modares University, IranGoogle Scholar
  71. Yarmohammadi A, Emamjome A (2009) Complementary report of detailed exploration of Barika gold deposit. Imternal report, Sardasht Goldis Co (in Persian)Google Scholar
  72. Zhang Y, Frantz JD (1987) Determination of the homogenization temperatures and densities of supercritical fluids in the system NaCl–KCl–CaCl2–H2O using synthetic fluid inclusions. Chem Geol 64:335–350CrossRefGoogle Scholar
  73. Zheng Y (1993) Calculation of oxygen isotope fractionation in anhydrous silicate minerals. Geochim Cosmochim Acta 57:1079–1091CrossRefGoogle Scholar

Copyright information

© Springer-Verlag (outside the USA) 2011

Authors and Affiliations

  • Shojaeddin Niroomand
    • 1
  • Richard J. Goldfarb
    • 2
  • Farid Moore
    • 1
  • Mohammad Mohajjel
    • 3
  • Erin E. Marsh
    • 2
  1. 1.Department of Earth Sciences, College of SciencesShiraz UniversityShirazIran
  2. 2.United States Geological Survey, Federal CenterDenverUSA
  3. 3.Department of Earth Sciences, College of SciencesTarbiat Modares UniversityTehranIran

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