Alireza Zarasvandi

Shahid Chamran University of Ahvaz

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Mohsen Rezaei

Carbon180

Houshang Pourkaseb

Shahid Chamran University of Ahvaz

Johann G. Raith

Montanuniversität Leoben

David R. Lentz

University of New Brunswick

Farid Moore

Shiraz University

Sina Asadi

Shiraz University

H Pourkaseb

Shahid Chamran University of Ahvaz

Fatemeh Rastmanesh

Shahid Chamran University of Ahvaz

Martiya Sadeghi

Geological Survey of Sweden

S. Liaghat

Luleå University of Technology

Cooperative Institutions

Shahid Chamran University of Ahvaz

Shiraz University

Ahvaz Jundishapur University of Medical Sciences

Islamic Azad University, Ahvaz Branch

Montanuniversität Leoben

Tehran University of Medical Sciences

Tarbiat Modares University

Shiraz University of Medical Sciences

Bu-Ali Sina University

Lorestan University

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Tracing of hydrothermal ore forming process in the Sorkhvand manganese deposit, Kermanshah Province, Iran

Arabian Journal of Geosciences (2016)

Alireza Zarasvandi Houshang Pourkaseb Masume Sepahvand Johann G. Raith Mohsen Rezaei

Pyrolusite

10.1007/s12517-015-2237-1

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Citations (9)

The Gol‐e‐Zard Zn‐Pb Deposit, Lorestan Province, Iran: a Metamorphosed SEDEX Deposit

Acta Geologica Sinica - English Edition (2014)

Alireza Zarasvandi Mona Sameti Martiya Sadeghi Fatemeh Rastmanesh H Pourkaseb

Abstract The Gol‐e‐Zard Zn‐Pb deposit is one of several sediment‐hosted Zn‐Pb deposits found in the central part of the Sanadaj‐Sirjan Zone, known as the Isfahan‐Malayer belt, western Iran. Mineralization occurs in Upper Triassic to Jurassic phyllites and meta‐sandstones. Sphalerite and galena are the most abundant metallic ores, with minor chalcopyrite. Calcite and quartz are the main gangue minerals. Fissure filling, replacement textures and especially mineralized faults, suggest an epigenetic stage in the Gol‐e‐Zard deposit formation. Geochemical studies of mineralized rocks show high concentrations of Zn, Pb and Cu, (Zn and Pb > 10000 ppm and Cu average 3000 ppm). LREE enrichment (LREE>HREE, La/Lu average 1.44) and positive Eu anomalies (Eu/Eu*>1 average 1.67) indicate reducing conditions during the deposition of deposit. However, some samples do not display negative Ce anomalies, which indicate that localized oxidizing conditions are also present. This study indicates that the Gol‐e‐Zard deposit formed due to circulating hydrothermal fluids in a marine environment. A SEDEX‐type genesis, which is defined by circulating hydrothermal fluids through sediments in a marine environment, and syngenetic precipitation of Zn and Pb sulphides, is suggested for the Gol‐e‐Zard deposit. Emplacement of some granitoid intrusions such as the Aligudarz granitoid intrusion remobilized mineralizing fluids and metamorphosed the Gol‐e‐Zard deposit.

Gangue

10.1111/1755-6724.12188

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Citations (7)

Major and trace element composition of urinary stones, Khuzestan province, southwest, Iran

Journal of Geochemical Exploration (2012)

Alireza Zarasvandi M Heidari Martiya Sadeghi E. Mousapoor

Positive correlation

Trace element

10.1016/j.gexplo.2012.08.014

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Citations (17)

Karst bauxite deposits in the Zagros Mountain Belt, Iran

Ore Geology Reviews (2008)

Alireza Zarasvandi A Charchi Emmanuel John M. Carranza Bahram Alizadeh

Anticline

Lithology

10.1016/j.oregeorev.2008.05.005

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Citations (86)

Rare earth element signatures of economic and sub-economic porphyry copper systems in Urumieh–Dokhtar Magmatic Arc (UDMA), Iran

Ore Geology Reviews (2015)

Alireza Zarasvandi Mohsen Rezaei Martiya Sadeghi David R. Lentz Mansour Adelpour

Back-arc basin

10.1016/j.oregeorev.2015.01.010

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Citations (74)

Environmental factors of urinary stones mineralogy, Khouzestan Province, Iran

Journal of African Earth Sciences (2014)

Alireza Zarasvandi Emmanuel John M. Carranza Majid Heidari Esmaeil Mousapour

Struvite

Brushite

Urinary stone

10.1016/j.jafrearsci.2014.04.031

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Citations (10)

Chemistry and determination of tectonomagmatic setting in mantle ‎peridotites from iron-copper area of the Heydarabad ‎

DOAJ (DOAJ: Directory of Open Access Journals) (2019)

Houshang Pourkaseb Alireza Zarasvandi Mansour Adelpour

آمیزة افیولیتی حیدرآباد در زمین‌درز سیستان، در مرز میان بلوک‏‌های قاره‏‌ای لوت و افغان جای گرفته است. این آمیزه دربردارندة پریدوتیت‏‌های گوشته‏‌ای و توالی پوسته‌ای است. پریدوتیت‏‌های گوشته‏‌ای بیشتر شامل هارزبورژیت و هارزبورژیت سرشار از کلینوپیروکسن هستند و در جایگاه پشته میان‌اقیانوسی پدید آمده‏‌اند. این پریدوتیت‏‌ها تحت‌تأثیر محلول‏‌های گرمابی قرار ‏‌گرفته و دگرسان شده‏‌اند. در این منطقه، کانه‏‌زایی آهن و مس در پی رفتار سیال‌های ‏‌گرمابی‏‌ روی داده است که در راستای‏‌ شکستگی‏‌ها و گسل‏‌ها در‏‌ حرکت بوده‌اند. ساخت و بافت مادة معدنی به‌صورت پرکنندة فضای خالی، دانه پراکنده، رگه‏‌رگچه و جانشینی است. دو فاز مهم برای رخداد کانه‌زایی در این محدوده شناخته شد. فاز نخست فرایندهای را دربر می‌گیرد که کانه‌زایی سولفیدی در پریدوتیت‏‌های گوشته‏‌ای را به‌دنبال داشته‌اند. فاز دوم، فرایند ورود سیال‌های اکسیدی است که کانه‌زایی مگنتیت را پدید آورده است. برپایة بررسی‌های ریزکاو الکترونی، کانی‏‌های الیوین، ارتوپیروکسن، کلینوپیروکسن و اسپینل سازنده‏‌های اصلی پریدوتیت‏‌های گوشته‏‌ای‌اند. بیشتر الیوین‏‌های پریدوتیت‏‌های گوشته سرپانتینی شده‏‌اند؛ اما الیوین‏‌های سالم از نوع فورستریت‌اند. همچنین، ارتوپیروکسن‏‌ها از نوع انستاتیت، کلینوپیروکسن‏‌ها از نوع دیوپسید و اسپینل‏‌ها از نوع آلومینیم کروم‏‌دارند.

10.22108/ijp.2018.111063.1085

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Discriminating productive and barren porphyry copper deposits in the southeastern part of the central Iranian volcano-plutonic belt, Kerman region, Iran: A review

Earth-Science Reviews (2014)

Sina Asadi Farid Moore Alireza Zarasvandi

Back-arc basin

Volcanic belt

Radiogenic nuclide

10.1016/j.earscirev.2014.08.001

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Citations (139)

Phosphogenesis in the Zagros Fold-Thrust Belt, Iran: The link between the Tethyan paleoenvironment and phosphate ore deposition

Ore Geology Reviews (2021)

Alireza Zarasvandi Zahra Fereydouni Bahram Alizadeh Nurul Absar A. D. Shukla

The Zagros phosphogenic horizon, hosted by the Eocene-Oligocene Pabdeh Formation, is located in the NW-SE-trending Zagros Fold-Thrust Belt (ZFTB), Iran. These phosphorites, which formed along the Tethyan Realm, are the most important and highest-grade phosphatic resources of Iran. This paper discusses the evolution and depositional paleoenvironment of the Zagros phosphogenic horizon. Petrographic studies indicate that the main components of the ZFTB phosphatic horizons are pellet, ooid, intraclasts, and bone fragments and various microfossils, which are common in other Tethyan phosphorites. Post-Archean Australian Shale-normalized patterns of REE in these rocks show HREE enrichment, a negative Ce anomaly in all studied samples and a positive Eu anomaly in the majority of the studied samples. These patterns are interpreted to reflect the original REE signature of the paleo-seawater rather than any significant effect of diagenetic changes on the geochemistry of the Zagros phosphorites. Comparison of measured 87Sr/86Sr values with the Eocene secular seawater curve suggests a Lutetian age (47.8 and 41.2 m.y.) for the Sheykh-Habil deposit and a Priabonian age (37.8 and 33.9 m.y.) for the Kuh-e-Sefid and Kuh-Rish deposits. The Zagros and eastern Mediterranean phosphorites form part of the Tethyan Phosphogenic Province which, over a period of ∼ 50 m.y., developed in a long (∼7000 km) and narrow (<800 km) east–west trending marine channel system. Additionally, the δ18OCarb values from the studied samples indicate minimal weathering, while the obtained δ13CCarb values support an unaltered authigenic origin, as has been proposed for other eastern Mediterranean phosphorites. Our findings suggest that the paleoenvironmental conditions during formation of the Zagros phosphorites varied from oxic-suboxic to anoxic during microbial decomposition of organic compounds and/or bacterial reduction of sulfate. The negative shifts evident in the δ13CCarb data and presence of glauconite are consistent with precipitation of the Zagros phosphorites in a shallow marine environment, most likely a mid- to outer ramp setting at a depth of ∼ 150 m within which the Pabdeh Formation is believed to have been deposited.

Authigenic

Ooid

10.1016/j.oregeorev.2021.104563

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Citations (9)

Geology of the Darreh-Zerreshk and Ali-Abad Porphyry Copper Deposits, Central Iran

International Geology Review (2005)

Alireza Zarasvandi S. Liaghat Marcos Zentilli

This paper describes the petrology, mineralogy, alteration, structural characteristics, and geological evolution of the Darreh-Zerreshk and Ali-Abad copper deposits within the central Iranian volcano-plutonic belt, Yazd Province, central Iran. Intrusions in this area, a result of subduction magmatism, range in composition from quartzmonzodiorite to granite, yet copper-molybdenum porphyry—type mineralization is restricted to quartzmonzodioritic to granodioritic plutons. The mineralizing intrusions cut Cretaceous and Eocene strata, and have been dated as Oligocene—Miocene. Strong negative anomalies for Nb, Ta, P, and Ti and enrichment in the LREE, LILE, Ba, Rb, Sr, and Pb for the mineralizing igneous rocks suggest they are of I type and have magmatic arc affinity. REE patterns, major-, and trace-element data suggest that these rocks were derived from partial melting of enriched upper mantle, modified by variable crustal contamination. Hornblende fractionation was an important control on the evolution of copper-bearing plutonic rocks. Structural observations suggest that these deposits were emplaced in tensional pull-apart domains formed between two secondary dextral strike-slip faults of the regional Dehshir-Baft shear system. Rapid exhumation of the porphyry copper systems allowed for the development of only minor supergene enrichment.

Plutonism

10.2747/0020-6814.47.6.620

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Citations (79)