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Journals / Turkish Journal of Earth Sciences / 2019 / Cilt: 28 - Sayı: 1

U-Pb zircon geochronology, geochemistry, and petrogenesis of the Hamech intrusions in the Kuh-e-Shah volcano-plutonic complex, Eastern Iran

Sara RIBEIRO
Abbas ETEMADI
Mohammad Hassan KARIMPOUR
José Francisco SANTOS
Ryan MATHUR
Azadeh MALEKZADEH SHAFAROUDI
Pages
38–59
Publication Date
2022-11-04
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

All data suggest that the Hamech intrusions developed in a low maturity continental margin arc setting related to the convergence of the Afghan and Lut Blocks and subduction of Sistan oceanic crust during the Eocene

📌 3 Key Takeaways

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Objective & Hypothesis:The Hamech area is located in the west of Kuh-e-Shah volcano-plutonic complex, close to the boundary between the Lut Block and Sistan Suture Zone (SSZ), and is composed of monzonite to diorite porphyries and rare gabbro that intruded into older volcanic rocks.
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Key Findings & Data:U-Pb zircon dating indicates an age of 36.9 ± 1 Ma for gabbro (Late Eocene, Priabonian) and 38.6 ± 0.5 Ma for dacite (Late Eocene, Bartonian).
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Conclusion & Impact:All data suggest that the Hamech intrusions developed in a low maturity continental margin arc setting related to the convergence of the Afghan and Lut Blocks and subduction of Sistan oceanic crust during the Eocene
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The Hamech area is located in the west of Kuh-e-Shah volcano-plutonic complex, close to the boundary between the Lut Block and Sistan Suture Zone (SSZ), and is composed of monzonite to diorite porphyries and rare gabbro that intruded into older volcanic rocks. U-Pb zircon dating indicates an age of 36.9 ± 1 Ma for gabbro (Late Eocene, Priabonian) and 38.6 ± 0.5 Ma for dacite (Late Eocene, Bartonian). Geochemically, the studied intrusions are dominantly I-type, high-K calc-alkaline, and metaluminous features. Primitive mantle-normalized trace-element spider diagrams of these rocks present enrichment in ion lithophile elements such as Cs, Rb, Ba, K, and Sr and depletion in high field strength elements such as Nb, Ti, Zr, and heavy rare earth elements. Besides, chondritenormalized rare earth elements plots of the rocks show enrichment in light rare earth elements (6.85 < LaN/YbN < 9.72) and a lack or weak negative Eu anomaly (Eu/Eu* = 0.81–1.02). The initial 87Sr/86Sr and 143Nd/144Nd ratios for the rocks from 0.704541 to 0.704880 and from 0.512633 to 0.512691, respectively, when recalculated to an age of 39 Ma. The εNd(i) values vary from +0.87 to +1.99, which fits into a suprasubduction mantle wedge source for the parental melts. All data suggest that the Hamech intrusions developed in a low maturity continental margin arc setting related to the convergence of the Afghan and Lut Blocks and subduction of Sistan oceanic crust during the Eocene

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Cite This Article

RIBEIRO, S., ETEMADI, A., KARIMPOUR, M. H., SANTOS, J. F., MATHUR, R., SHAFAROUDI, A. M. (2022). U-Pb zircon geochronology, geochemistry, and petrogenesis of the Hamech intrusions in the Kuh-e-Shah volcano-plutonic complex, Eastern Iran. Turkish Journal of Earth Sciences, Cilt: 28 - Sayı: 1, 38–59. https://ajindex.com/articles/603050

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References (12)

  1. Abdi M, Karimpour MH (2013). Petrochemical characteristics and timing of Middle Eocene granitic magmatism in Kooh-Shah, Lute Block, Eastern Iran. Acta Geol Sin 84: 1032-1044.
  2. Aghanabati A (1998). Major sedimentary and structural units of Iran (map). J Geosci 7: 29-30.
  3. Aghanabati A (2005). Geology of Iran: Geological Survey of Iran, Tehran, Iran (in Persian). Alavi M (1991). Sedimentary and structural characteristics of the Paleo-Tethys remnants in northeastern Iran. Geol Soc Am Bull 103: 983-992.
  4. Andrade FRD, Möller P, Höhndorf A (1999). The effect of hydrothermal alteration on the Sr and Nd isotopic signatures of the Barra do Itapirapuã carbonatite, southern Brazil. The J Geol 107: 177-191.
  5. Arjmandzadeh R (2011). Mineralization, geochemistry, geochronology, and determination of tectonomagmatic setting of intrusive rocks in Dehsalm and Chahshaljami prospect areas, Lut block, east of Iran. PhD, Ferdowsi University of Mashhad, Mashhad, Iran. Arjmandzadeh R, Karimpour MH, Mazaheri SA, Santos JF, Medina JM, Homam SM (2011). Sr–Nd isotope geochemistry and petrogenesis of the Chah-Shaljami granitoids (Lut Block, eastern Iran). J Asian Earth Sci 41: 283-296.
  6. Arjmandzadeh R, Santos JF (2014). Sr–Nd isotope geochemistry and tectonomagmatic setting of the Dehsalm Cu–Mo porphyry mineralizing intrusives from Lut Block, eastern Iran. Int J Earth Sci 103: 123-140.
  7. Asiabanha A, Bardintzeff JM, Kananian A, Rahimi G (2012). Post-Eocene volcanics of the Abazar district, Qazvin, Iran: Mineralogical and geochemical evidence for a complex magmatic evolution. J Asian Earth Sci 45: 79-94.
  8. Babazadeh SA, De Wever P (2004). Radiolarian Cretaceous age of Soulabest radiolarites in ophiolite suite of eastern Iran. B Soc géol Fr 175: 121-129.
  9. Berberian M (1981). Towards a paleogeography and tectonic evaluation of Iran. Can J Earth Sci 18: 210-265.
  10. Berberian M, Jackson JA, Qorashi M, Khatib MM, Priestley K, Talebien M, Ghafuri-Ashtiani M, (1999). The 1997 May 10 Zirkuh (Qaenat) earthquake (M.W 7.2): aulting along the Sistan suture zone of eastern Iran. Geophys J Int 136: 671-694.
  11. Beydokhti RM, Karimpour MH, Mazaheri SA, Santos JF, Klötzli U (2015). U–Pb zircon geochronology, Sr–Nd geochemistry, petrogenesis and tectonic setting of Mahoor granitoid rocks (Lut Block, Eastern Iran). J Asian Earth Sci 111: 192-205.
  12. Blein O, Lapierre H, Schweickert RA (2001). A Permian islandarc with a continental basement: the Black Dyke Formation Nevada, North American Cordillera. Chem Geol 175: 543-566. B