Geochemical constraints on the origin and tectonic setting of Chargar intrusions in the Alborz orogenic belt, NW Iran

  • Seyed Hedayatalah Mousavi Motlagh
  • Majid GhaderiEmail author
  • Mir Ali Asghar Mokhtari
  • Narges Yasami


Chargar area is located in the southern border of Tarom subzone within the Alborz magmatic belt of NW Iran. Two types of intrusions, mainly present in the southern part of the area, have been identified. These bodies intruded into the Karaj Formation volcanic and volcaniclastic rocks. Type-I intrusions occur in the south and include two magmatic bodies: (a) Gabbro-pyroxene quartz monzodiorite-quartz monzodiorite and (b) quartz syenite. Type-II crops out in the west and has a gabbro – gabbro-diorite composition. Geochemically, Chargar intrusive rocks belong to the high-K calc-alkaline to shoshonitic series and are classified as I-type and metaluminous granitoids. These intrusive rocks show insignificant different distribution patterns of trace elements and REEs, but generally they are characterized by highly enriched large ion lithophile elements (e.g., K and Ba) and depleted Nb, similar to that of continental arc magmatism. Type-I intrusions and Type-II mafic intrusion were originated from mantle source with amphibole-bearing spinel peridotite composition. These intrusions formed in a continental arc to post-collisional tectonic setting.


Geochemistry continental arc post-collision calc-alkaline magmatism Chargar Alborz 



This paper is a part of the first author’s PhD thesis at Tarbiat Modares University, Tehran, Iran. An anonymous reviewer is thanked for the constructive review of the manuscript. Dr Rajneesh Bhutani is appreciated for careful editorial handling of the manuscript.


  1. Aldanmaz E, Pearce J A, Thirlwall M F and Mitchell J G 2000 Petrogenetic evolution of late Cenozoic, post-collision volcanism in western Anatolia, Turkey; J. Volcanol. Geotherm. Res. 102 67–95.CrossRefGoogle Scholar
  2. Altherr R, Holl A, Ernst H and Kreuzer H 2000 High-potassium, calc-alkaline I-type plutonism in the European Variscides: Northern Vosges (France) and northern Schwarzwald (Germany); Lithos 50(1) 51–73, Scholar
  3. Arslan M and Aslan Z 2006 Mineralogy, petrography and whole-rock geochemistry of the Tertiary granitic intrusions in the eastern Pontides, Turkey; J. Asian Earth Sci. 27(2) 177–193, Scholar
  4. Azizi H, Mehrabi B and Akbarpour A 2009 Genesis of Tertiary magnetite–apatite deposits, southeast of Zanjan, Iran; Res. Geol. 59 330–341.CrossRefGoogle Scholar
  5. Barth M G, Foley S F and Horn I 2002 Partial melting in Archean subduction zones: Constraints from experimentally determined trace element partition coefficients between eclogitic minerals and tonalitic melts under upper mantle conditions; Precamb. Res. 113 323–340, Scholar
  6. Bau M 1991 Rare-earth element mobility during hydrothermal and metamorphic fluid-rock interaction and the significance of the oxidation state of europium. Chem. Geol. 93 (3–4) 219–230.CrossRefGoogle Scholar
  7. Blatter D L, Carmichael I S E, Deino A L and Renne P R 2001 Neogene volcanism at the front of the central Mexican volcanic belt: Basaltic andesites to dacites, with contemporaneous shoshonites and high-TiO2 lava; Geol. Soc. Am. Bull. 113 1324–1342,<1324:NVATFO>2.0.CO;2.CrossRefGoogle Scholar
  8. Bonev N and Beccaletto L 2007 From syn- to post-orogenic Tertiary extension in the north Aegean region: Constraints on the kinematics in the eastern Rhodope–Thrace, Bulgaria–Greece and the Biga Peninsula, NW Turkey; In: The geodynamics of the Aegean and Anatolia (eds) Taymaz T et al., Geol. Soc. London, Spec. Publ. 291 113–114.Google Scholar
  9. Bowen N L 1937 Recent high–temperature research on silicates and its significance in igneous geology; Am. J. Sci. 233 1–21.CrossRefGoogle Scholar
  10. Brunet M F, Korotaev M V, Ershov A V and Nikishin A M 2003 The South Caspian basin: A review of its evolution from subsidence modelling; Sedim. Geol. 156 119–148, Scholar
  11. Castro A, Aghazadeh M, Badrzadeh Z and Chichorro M 2013 Late Eocene–Oligocene post-collisional monzonitic intrusions from the Alborz magmatic belt, NW Iran: An example of monzonite magma generation from a metasomatized mantle source; Lithos 180–181 109–127.CrossRefGoogle Scholar
  12. Chappell B W 1999 Aluminium saturation in I- and S-type granites and the characterization of fractionated haplo granites; Lithos 46 535–551, Scholar
  13. Chappell B W and Stephens W E 1988 Origin of infra crustal (I-type) granite magmas; In: The origin of granites, Earth Env. Sci. Trans. Roy. Soc. 79(2–3) 71–86, Turkey; In: Comptes rendus des Séance de la Société de Physique et d’Histoire Naturelle de Genève 10 141–150.Google Scholar
  14. Chappell B W and White A J R 2001 Two contrasting granite types: 25 years later; Austr. J. Earth Sci. 48(4) 489–499, Scholar
  15. Collins W J, Beams S D, White A J R and Chappell B W 1982 Nature and origin of A-type granites with particular reference to southeastern Australia; Contrib. Mineral. Petrol. 80 189–200.CrossRefGoogle Scholar
  16. Dall'Agnol R, Frost C D and Ramo T 2012 IGCP Project 510 A-type granites and related rocks through time: Project vita, results and contribution to granite research; Lithos 151 1–16.CrossRefGoogle Scholar
  17. Desta M T, Ishiwatari A, Machi S, Arai Sh, Tamura A, Ledneva G V, Sokolov S D, Moiseev A V and Bazylev B A 2015 Petrogenesis of Triassic gabbroic and basaltic rocks from Chukotka, NE Russia: Eastern end of the ‘arc-type’ Siberian LIP? J. Miner. Petrol. Sci. 110 249–275.CrossRefGoogle Scholar
  18. Esmaeli M, Lotfi M and Nezafati N 2015 Fluid inclusion and stable isotope study of Khalyfehlou copper deposit, southeast Zanjan, Iran; Arab. J. Geosci. 8 9625–9633.CrossRefGoogle Scholar
  19. Feeley T C and Cosca M A 2003 Time vs. composition trends of magmatism at Sunlight volcano, Absaroka volcanic province, Wyoming; Geol. Soc. Am. Bull. 115 714–772,<0714:TVCTOM>2.0.CO;2.CrossRefGoogle Scholar
  20. Gill J B 1981 Orogenic Andesites and Plate Tectonics; Springer, Berlin, 390p.CrossRefGoogle Scholar
  21. Gorton M P and Schandl E S 2000 From continents to island arcs: A geochemical index of tectonic setting for arc-related and within-plate felsic to intermediate volcanic rocks; Can. Mineral. 38 1065–1073.CrossRefGoogle Scholar
  22. Guest B, Axen G J, Lam P S and Hassanzadeh J 2006 Late Cenozoic shortening in the west‐central Alborz Mountains, northern Iran, by combined conjugate strike‐slip and thin‐skinned deformation; Geosphere 2 35–52, Scholar
  23. Guest B, Horton B K, Axen G J, Hassanzadeh J and McIntosh W C 2007 Middle to late Cenozoic basin evolution in the western Alborz Mountains: Implications for the onset of collisional deformation in northern Iran; Tectonics 26 TC6011, Scholar
  24. Guo Z F, Wilson M, Zhang M, Cheng Z and Zhang L 2013 Post-collisional, K-rich mafic magmatism in south Tibet: Constraints on Indian slab-to-wedge transport processes and plateau uplift; Contrib. Mineral. Petrol. 165 1311–1340.CrossRefGoogle Scholar
  25. Guo Z F, Wilson M, Zhang M, Cheng Z and Zhang L 2015 Post-collisional ultrapotassic mafic magmatism in south Tibet: Products of partial melting of pyroxenite in the mantle wedge induced by roll-back and delamination of the sub-ducted Indian continental lithosphere slab; J. Petrol. 56 1365–1406.CrossRefGoogle Scholar
  26. Harris N B W, Pearce J A and Tindle A G 1986 Geochemical characteristics of collision-zone magmatism; In: Collision Tectonics (eds) M P Coward and A C Ries, Geol. Soc. London, Spec. Publ., pp. 67–81.Google Scholar
  27. Hassanzadeh J, Axen G J, Guest B, Stockli D F and Ghazi A M 2004 The Alborz and NW Urumieh–Dokhtar magmatic belts, Iran: Rifted parts of a single ancestral arc; Geol. Soc. Am. Abstr. Programs 36(5) 434.Google Scholar
  28. Hastie A R, Kerr A C, Pearce J A and Mitchell S F 2007 Classification of altered volcanic island arc rocks using immobile trace elements: Development of the Co–Th discrimination diagram; J. Petrol. 48 2341–2357.CrossRefGoogle Scholar
  29. Hawkesworth C J, Gallagher K, Hergt J M and McDermott F 1993 Mantle and slab contributions in arc magmas; Ann. Rev. Earth Planet. Sci. 2 175–204.CrossRefGoogle Scholar
  30. Hawkesworth C, Turner S, Peate D, McDermott F and van Calsteren P 1997 Elemental U and Th variations in island arc rocks: Implications for U-series isotopes; Chel. Geol. 139 207–221.CrossRefGoogle Scholar
  31. Hou T, Zhang Z C, Encarnacion J and Santosh M 2012 Petrogenesis and metallogenesis of the Taihe gabbroic intrusion associated with Fe–Ti-oxide ores in the Panxi district, Emeishan large igneous province, southwest China; Ore Geol. Rev. 49 109–127.Google Scholar
  32. Hirayama K, Samimi M, Zahedi M and Hushmand-Zadeh A 1966 Geology of Taroum district, western part (Zanjan area north-west Iran), Geological Survey of Iran.Google Scholar
  33. Hirayama K, Haghipour A and Hajian J 1965 Geology of the Zanjan area: The Tarom district, eastern part (Zanjan area, northwest Iran), with 1:100,000 map; Geological Survey of Iran, Tehran 28 33p.Google Scholar
  34. Hosseini M, Moosavi E and Rasouli Jamadi F 2017 Abhar 1:100,000 geological map; Geological Survey of Iran.Google Scholar
  35. Irannezhadi M R, Ghorbani M R, Vossoughi M and Pourmoafi M 2007 Tertiary arc related volcanism in Central Alborz Mountains; Geophys. Res. Abs. 9 867.Google Scholar
  36. Irvine T N and Baragar W R A 1971 A guide to the chemical classification of the common volcanic rocks; Can. J. Earth Sci. 8 523–548.Google Scholar
  37. Kamber B S, Ewart A, Collerson K D, Bruce M C and McDonald G D 2002 Fluid-mobile trace element constraints on the role of slab melting and implications for Archaean crustal growth models; Contrib. Mineral. Petrol. 144 38–56.CrossRefGoogle Scholar
  38. Kelemen P B, Hanghøj K and Greene A 2003 Subduction-related magmatic arcs, with an emphasis on primitive andesite and lower crust; In: The Crust (eds) Holland H D and Turekian K K, V. 3. Treatise on Geochemistry, Oxford, UK: Elsevier-Pergamon, pp. 593–659.Google Scholar
  39. Kepezhinskas P, McDermott F, Defant M J, Hochstaedter A, Drummond M S, Hawkesworth C J, Koloskov A, Maury R C and Bellon H 1997 Trace element and Sr–Nd–Pb isotopic constraints on a three-component model of Kamchatka Arc petrogenesis; Geochim. Cosmochim. Acta 61 577–600, Scholar
  40. Kouhestani H, Azimzadeh A M, Mokhtari M A A and Ebrahimi M 2017 Mineralization and fluid evolution of epithermal base metal veins from the Aqkand deposit, NW Iran; N. Jb. Miner. Abh. (J. Min. Geochem.) 194(2) 139–155.CrossRefGoogle Scholar
  41. Kouhestani H, Mokhtari M A A, Chang Z and Johnson C A 2018 Intermediate sulfidation type base metal mineralization at Aliabad–Khanchy, Tarom–Hashtjin metallogenic belt, NW Iran; Ore Geol. Rev. 93 1–18.Google Scholar
  42. Liégeois J P, Navez J, Hertogen J and Black R 1998 Contrasting origin of post-collisional high-K calc-alkaline and shoshonitic versus alkaline and peralkaline granitoids. The use of sliding normalization; Lithos 45 1–28, Scholar
  43. Liu D, Zhao Z, Zhu D C, Niu Y, DePaolo D J, Mark Harrison T, Mo X, Dong G, Zhou S, Sun C, Zhang Z and Liu J 2014 Post-collisional potassic and ultrapotassic rocks in southern Tibet: Mantle and crustal origins in response to India–Asia collision and convergence; Geochim. Cosmochim. Acta 143 207–231.CrossRefGoogle Scholar
  44. Mazzucchelli M, Rivalenti G, Vannucci R, Bottazzi P, Ottolini L, Hofmann A and Parenti M 1992 Primary positive Eu anomaly in clinopyroxenes of low-crust gabbroic rocks; Geochim. Cosmochim. Acta 56(6) 2363–2370.CrossRefGoogle Scholar
  45. McDonough W F 1991 Partial melting of subducted oceanic crust and isolation of its residual eclogitic lithology; Phil. Trans. Roy. Soc. London, Ser. A 335 407–418.CrossRefGoogle Scholar
  46. McDonough W F and Sun S S 1995 The composition of the Earth; Chem. Geol. 120 223–253.CrossRefGoogle Scholar
  47. Meen J K 1987 Formation of shoshonites from calc-alkaline basalt magmas: Geochemical and experimental constraints from the type locality; Contrib. Mineral. Petrol. 97 333–351, Scholar
  48. Mehrabi B, Ghasemi Siani M, Goldfarb R, Azizi H, Ganerod M and Marsh E E 2016 Mineral assemblages, fluid evolution and genesis of polymetallic epithermal veins, Gulojeh district, NW Iran; Ore Geol. Rev. 78 41–57.Google Scholar
  49. Middlemost E A K 1985 Magmas and magmatic rocks: An introduction to igneous petrology; Longman Group, UK, pp. 73–87.Google Scholar
  50. Morley C K, Kongwung B, Julapour A A, Abdolghafourian M, Hajian M, Waples D, Warren J, Otterdoom H, Srisuriyon K and Kazemi H 2009 Structural development of a major late Cenozoic basin and transpressional belt in central Iran: The central basin in the Qom-Saveh area; Geosphere 5 1–38.CrossRefGoogle Scholar
  51. Mousavi Motlagh S H and Ghaderi M 2019 The Chargar Au–Cu deposit: An example of low-sulfidation epithermal mineralization from the Tarom subzone, NW Iran; N. Jb. Miner. Abh. (J. Min. Geochem.), 196(1) 43–66, Scholar
  52. Muller D and Groves D I 1997 Potassic igneous rocks and associated Gold-Copper mineralization; Springer-Verlag, Berlin, Heidelberg, 238p.Google Scholar
  53. Nabatian G, Giang S Y, Honarmand M and Neubauer F 2016 Zircon U–Pb ages, geochemical and Sr–Nd–Pb–Hf isotopic constraints on petrogenesis of the Tarom–Olya pluton, Alborz magmatic belt; Lithos 244 43–58, Scholar
  54. Nabatian G, Ghaderi M, Neubauer F, Honarmand M, Lui X, Dong Y, Jiang S-Y and Bernroider M 2014 Petrogenesis of Tarom high-potassic granitoids in the Alborz–Azarbaijan belt, Iran: Geochemical, U–Pb zircon and Sr–Nd–Pb isotopic constraints; Lithos 184–187 324–345.CrossRefGoogle Scholar
  55. Nakamura N 1974 Determination of REE, Ba, Mg, Na and K in carbonaceous and ordinary chondrites; Geochim. Cosmochim. Acta 38 757–775.CrossRefGoogle Scholar
  56. Pearce J 1996 Sources and settings of granitic rocks; Episodes 19 120–125.Google Scholar
  57. Pearce J A and Peate D W 1995 Tectonic implications of the composition of volcanic arc magmas; Ann. Rev. Earth Planet. Sci. 23 251–285.CrossRefGoogle Scholar
  58. Peccerillo A and Taylor S R 1976 Geochemistry of Eocene calc-alkaline volcanic rocks from Kastamonu area, northern Turkey; Contrib. Mineral. Petrol. 58 63–81.CrossRefGoogle Scholar
  59. Rapp R P and Watson E B 1995 Dehydration melting of metabasalt at 8–32 kbar: Implications for continental growth and crust–mantle recycling; J. Petrol. 36 891–931, Scholar
  60. Rudnick R L 1992 Restites, Eu anomalies, and the lower continental crust; Geochim. Cosmochim. Acta 56 963–970.CrossRefGoogle Scholar
  61. Seghedi I, Downes H, Szakács A, Mason P R D, Thirl-wall M F, Roşu E, Pécskay Z, Márton E and Panaiotu C 2004 Neogene–Quaternary magmatism and geodynamics in the Carpathian–Pannonian region; A synthesis: Lithos 72 117–146.Google Scholar
  62. Shand S J 1943 Eruptive Rocks; 2nd edn, John Wiley, New York.Google Scholar
  63. Sun S S and McDonough W F 1989 Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes; In: Magmatism in the Ocean Basins (eds) Saunders A D and Norry M J, Geol. Soc. London, Spec. Publ. 42 313–435.Google Scholar
  64. Saunders J C, Dolgin K G and Lowry L D 1980 The maturation of frequency selectivity in C57BL/6J mice studied with auditory evoked response tuning curves; Brain Res. 187 69–79.CrossRefGoogle Scholar
  65. Verdel Ch, Wernicke B P, Hassanzadeh J and Guest B 2011 A Paleogene extensional arc flare‐up in Iran; Tectonics 30 TC3008, Scholar
  66. Vincent S J, Allen M B, Ismail‐Zadeh A D, Flecker R, Foland K A and Simmons M D 2005 Insights from the Talysh of Azerbaijan into the Paleogene evolution of the South Caspian region; Geol. Soc. Am. Bull. 117 1513–1533, Scholar
  67. Wang K, Plank T, Walker J D and Smith E I 2002 A mantle melting profile across the basin and range, SWUSA; J. Geophys. Res. 107, ECV 5-1–ECV, 5–21, Scholar
  68. Wang H, Wu Y B, Qin Z W, Zhu L Q, Liu Q, Liu X C, Gao S, Wijbrans J R, Zhou L, Gong H J and Yuan H L 2013 Age and geochemistry of Silurian gabbroic rocks in the Tongbai orogen, central China: Implications for the geodynamic evolution of the North Qinling arc-back-arc system; Lithos 179 1–15.CrossRefGoogle Scholar
  69. White A J R and Chappell B W 1977 Ultrametamorphism and granitoid genesis; Tectonophys. 43 7–22, Scholar
  70. White A J R and Chappell B W 1983 Granitoid types and their distribution in the Lachlan Fold Belt, southeastern Australia; Geol. Soc. Am. Memoir 159 21–34.Google Scholar
  71. Whitney D and Evans B M 2010 Abbreviations for names of rock-forming minerals; Am. Mineral. 95 185–187.CrossRefGoogle Scholar
  72. Woodhead J D, Hergt J M, Davidson J P and Eggins S M 2001 Hafnium isotope evidence for ‘conservative’ element mobility during subduction zone processes; Earth Planet. Sci. Lett. 192 331–346.Google Scholar
  73. Yang J H, Sun J F, Chen F K, Wilde S A and Wu F Y 2007 Sources and petrogenesis of late Triassic dolerite dikes in the Liaodong peninsula: Implications for post-collisional lithosphere thinning of the eastern North China Craton; J. Petrol. 48 1973–1997.CrossRefGoogle Scholar
  74. Yasami N, Ghaderi M, Mokhtari M A A and Mousavi Motlagh S H 2018 Petrogenesis of the two phases of intrusive rocks at Chodarchay, NW Iran: Using trace and rare earth elements, NW Iran; Arab. J. Geosci. 11(20) 605, Scholar
  75. Zhao Z, Mo X, Dilek Y, Niu Y, De Paolo D J, Robinson P, Zhu D, Sun C, Dong G and Zhou S 2009 Geochemical and Sr–Nd–Pb–O isotopic compositions of the post-collisional ultrapotassic magmatism in SW Tibet: Petrogenesis and implications for India intra-continental subduction beneath southern Tibet; Lithos 113 190–212.CrossRefGoogle Scholar
  76. Zheng Y F 2012 Metamorphic chemical geodynamics in continental subduction zones; Chem. Geol. 328 5–48.CrossRefGoogle Scholar

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© Indian Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of Economic GeologyTarbiat Modares UniversityTehranIran
  2. 2.Department of Geology, Faculty of SciencesUniversity of ZanjanZanjanIran

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