Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Textures and chemical compositions of the Narm iron oxide-apatite deposit in Kuh-e-Sarhangi district (Central Iran): Insights into the magmatic-hydrothermal mineralization
Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
Department of Geology and Research Center for Ore Deposit of Eastern Iran, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-3881-7249
Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
Show others and affiliations
2022 (English)In: Ore Geology Reviews, ISSN 0169-1368, E-ISSN 1872-7360, Vol. 141, article id 104631Article in journal (Refereed) Published
Abstract [en]

The Narm deposit is located in the Kuh-e-Sarhangi district which is a main part of the most significant Iranian iron mineralization belt, the Kashmar-Kerman Tectonic Zone (KKTZ) in Central Iran. The Narm deposit comprises an estimated total of ∼ 135000 tons of iron ore with an average grade of ∼ 55% Fe and is hosted in Early Cambrian volcano sedimentary rocks of the Rizu formation. Ore occurrences in this deposit consist of lens-shaped magnetite ore bodies, magnetite-apatite-actinolite veins and locally rare brecciated dolomite with magnetite clasts. Magnetite, pyrite, chalcopyrite and specularite associated with apatite, actinolite, biotite and carbonate minerals form the primary main mineral assemblage which is accompanied by hematite and goethite as the secondary minerals. Magnetite as the most current mineral of Narm deposit reveal the magmatic to hydrothermal evolution of mineralization. Magmatic magnetite minerals (Mag I) are dark-gray inclusion-rich magnetite spatially correlated with high temperature Ca-Fe alteration. The brighter inclusion-free hydrothermal magnetite groups (Mag II and Mag III) form during the temperature decreasing of the mineralizing fluid. According to the magnetite chemistry examination, most magnetite fall into the field for magnetite from iron-oxide apatite (IOA) deposits. Apatite minerals with F/Cl >2, belong geochemically to the fluorapatite type. In addition to the primary dolomite, there are some hydrothermal Fe-rich dolomites and Mn bearing ones, indicating the hydrothermal fluid playing the important role for Fe-rich mineralization. In respect to fluid evolution, fluid inclusion analysis of calcite and apatite minerals form the magnetite paragenesis assemblage represent homogenization temperature range for fluid between 325-557℃. The salinity of fluid varied from 7.7 to 11.6 wt % NaCl equivalent and a cooling trend with the dominant chlorine complex as an agent for deposition of the Fe-rich ores. The geochemical characteristics of the δ18Ofluid values of magnetite (from +6.1 to +10.4‰) and δ18Ofluid values of actinolite (from +7.7 to +12.5‰) represent the magmatic-hydrothermal (δ18Ofluid > + 0.9 ‰) formation process. The iron rich Al-clinochlore composition from the alteration zone indicates a temperature range between 250 and 330℃ which points to a temperature reduction of hydrothermal fluids in this mineralizing zone. The integrated geochemical data from this investigation, including mineral chemistry, microthermometry of fluid inclusions and oxygen isotope data all reveal a magmatic-hydrothermal genesis for this deposit.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 141, article id 104631
Keywords [en]
Mineral chemistry, Fluid inclusion, O-isotope, Magnetite-Apatite deposit, Narm, Kuh-e-Sarhangi, Iran
National Category
Geology
Research subject
Applied Geochemistry
Identifiers
URN: urn:nbn:se:ltu:diva-88297DOI: 10.1016/j.oregeorev.2021.104631ISI: 000747603500001Scopus ID: 2-s2.0-85121255012OAI: oai:DiVA.org:ltu-88297DiVA, id: diva2:1619174
Funder
European Regional Development Fund (ERDF)
Note

Validerad;2022;Nivå 2;2022-01-01 (johcin);

Funder: Hellenic Foundation for Research and Innovation (275 HFRI-FM17-3090); Greek national funds (T2EDK-00468)

Available from: 2021-12-13 Created: 2021-12-13 Last updated: 2024-03-27Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Azimzadeh, Amir Morteza

Search in DiVA

By author/editor
Azimzadeh, Amir Morteza
By organisation
Geosciences and Environmental Engineering
In the same journal
Ore Geology Reviews
Geology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 119 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf