SavedAdd your journal

Journals / Turkish Journal of Earth Sciences / 2016 / Cilt: 25 - Sayı: 5

Mineral chemistry of igneous rocks in the Lar Cu-Mo prospect, southeastern part of Iran: implications for P, T, and O2

Rahele MORADI
Mohammad BOOMERI
Sasan BAGHERI
Kazuo NAKASHIMA
Pages
418–433
Publication Date
2022-11-05
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

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

The whole-rock chemical data show that the study rocks are shoshonitic and high-K calc-alkaline.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:TheLar Cu-Mo prospect is located 20 km north of Zahedan in Sistan and Baluchestan Province.
📊
Key Findings & Data:The compositional range of plagioclase is relatively narrow (0.11% 26.05% An), whereas that of potassium feldspar is wide (11.80% 96.02% Or).
💡
Conclusion & Impact:The whole-rock chemical data show that the study rocks are shoshonitic and high-K calc-alkaline.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

TheLar Cu-Mo prospect is located 20 km north of Zahedan in Sistan and Baluchestan Province. This area is geologically situated in the Sistan Suture Zone. The Cu-Mo mineralization occurs as silicic veins in the Lar igneous rocks and includes hypogene chalcopyrite, bornite, and molybdenite mineralization. The syenite to monzonite host rocks occur as stock and dyke and display granular to porphyritic texture. In this study, mineral chemistry and petrographic examination of igneous rocks are used to constrain the crystallization conditions of the magma. The compositional range of plagioclase is relatively narrow (0.11% 26.05% An), whereas that of potassium feldspar is wide (11.80% 96.02% Or). Analyses of representative Lar biotite samples with electron microprobe analysis suggest that crystallization took place at average temperature of 731 °C. Amphiboles are calcic and compositionally range from pargasite to ferro-pargasite, edenite, actinolite, and magnesio-hornblende. Estimation of temperature and pressure using calcic amphibole geothermobarometry equations indicates that crystallization is estimated to have taken place at 831 °C and 7.65 kbar. Clinopyroxenes are mainly diopside and were crystallized in a magma chamber at an average temperature and pressure of 926 °C and 7.54 kbar, respectively. According to the mineral composition, the studied igneous rocks are calc-alkaline in magmatic series and were crystallized from a calc-alkaline oxidized magma. The whole-rock chemical data show that the study rocks are shoshonitic and high-K calc-alkaline.

🔖

Cite This Article

MORADI, R., BOOMERI, M., BAGHERI, S., NAKASHIMA, K. (2022). Mineral chemistry of igneous rocks in the Lar Cu-Mo prospect, southeastern part of Iran: implications for P, T, and O2. Turkish Journal of Earth Sciences, Cilt: 25 - Sayı: 5, 418–433. https://ajindex.com/articles/603116

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (10)

  1. Abdel-Rahman AM (1994). Nature of biotites from alkaline, calc-alkaline and peraluminous magmas. J Petrol 35: 525-541.
  2. Ali SA (2012). Geochemistry and geochronology of Tethyan-arc related igneous rocks, NE Iraq. PhD, University of Wollongong, Wollongong, Australia. Arjmandzadeh R, Karimpour MH, Mazaheri SA, Santos JF, Medina JM, Homam SM (2011). SrNd isotope geochemistry and petrogenesis of the Chah-Shaljami granitoids (Lut Block, Eastern Iran). J Asian Earth Sci 41: 283-296.
  3. Bagheri S, Bakhshi MR (2001). Investigation of North Zahedan Magmatism and Its Relation to Ore Genesis. Zahedan, Iran: University of Sistan and Baluchestan. Behrouzi A (1993). Geological Map of Zahedan Quadrangle (1:250000). Tehran, Iran: Geological Survey of Iran. Boomeri M (2004). Mineralogy and geochemistry of Lar mountains igneous rocks in northern part of Zahedan. In: 12th Symposium of Crystallography and Mineralogy of Iran. Boomeri M, Lashkaripour GR, Gorgij MN (2005). F and Cl in biotites from Zahedan granitic rocks. Iranian Journal of Crystallography and Mineralogy 13: 79-94.
  4. Boomeri M, Nakashima K, Lentz DR (2009).
  5. The Miduk porphyry Cu deposit, Kerman, Iran: a geochemical analysis of the potassic zone including halogen element systematics related to Cu mineralization processes. J Geochem Explor 103: 17-29.
  6. Boomeri M, Nakashima K, Lentz DR (2010). The Sarcheshmeh porphyry copper deposit, Kerman, Iran: a mineralogical analysis of the igneous rocks and alteration zones including halogen element systematic related to Cu mineralization processes. Ore Geol Rev 38: 367-381.
  7. Camp VE, Griffis RJ (1982). Character, genesis and tectonic setting of igneous rocks in the Sistan Suture Zone, eastern Iran. Lithos 15: 221-239.
  8. Chance P (1981). Petrogenesis of a low-Ti, potassic suite: Kuh-e Lar caldera subsidence complex, eastern Iran. MSc, University of Western Ontario, London, Canada. Chivas AR (1981). Geochemical evidence for magmatic fluids in porphyry copper mineralization, part 1: Mafic silicates from the Koloula igneous complex. Contrib Mineral Petrol 78: 289-403.
  9. Dal Negro A, Carbonin S, Molin GM, Cundari A, Piccirillo EM (1982). Intracrystalline cation distribution in natural clinopyroxenes of tholeiitic, transitional, and alkaline basaltic rocks. In Saxena SK, editor. Advances in Physical Geochemistry. Vol. 2. Berlin, Germany: Springer, pp. 117-150.
  10. Deer WA, Howie RA, Zussman J (1979). An Introduction to the Rock Forming Minerals. London, UK: Longman. Dushangani F (2015). Mineralog