Petrological Journal

Intermediat-sulfidation epithermal Cu (Pb and Zn) mineralization in the Marshoun 2 occurrence (SE Zanjan): Mineralization, geochemistry and fluid inclusions evidences

Somayeh Mohammadi; Hossein Kouhestani; Mir Ali Asghar Mokhtari

Volume 13, Issue 1 , August 2022, , Pages 143-168

https://doi.org/10.22108/ijp.2021.128215.1229

Abstract

Mineralization in the Marshoun 2 occurrence occurs as quartz-sulfide veins hosted by intermediate tuff units, and is divided into four stages. Stage 1 is represented by silicification ... Read More

Ti-Fe mineralization in Bafq anomaly no. 15, Central Iran: Insights to mineralogy and mineral chemistry

Sakine Amraei; Mehrdad Behzadi; Mohammad Yazdi; Hossein Kouhestani; Majid Ghasemi Siani

Volume 12, Issue 1 , June 2021, , Pages 93-112

https://doi.org/10.22108/ijp.2020.123784.1188

Abstract

The Ti- Fe mineralization in Bafq 15 anomaly located 35 Km NW of Bafq city, and is a part of Poshte Badam Block in the Central Iran. Mineralization including magnetite, titanomagnetite, ... Read More

Petrology, geochemistry and tectonomagmatic setting of Zajkan granitoid, Tarom-Hashtjin sub-zone, West of Qazvin

Amir abbas Seyedqaraeini; Mir Ali Asghar Mokhtari; Hossein Kouhestani

Volume 10, Issue 3 , December 2020, , Pages 79-100

https://doi.org/10.22108/ijp.2020.118649.1147

Abstract

Zajkan area as a part of Tarom-Hashjin magmatic belt contains some granitic intrusions which are intruded into the Eocene volcano-sedimentary rocks. Eocene volcano-sedimentary rocks ... Read More

Petrology and geochemistry of Granitoids at Khanchay-Aliabad region, Tarom sub-zone, East of Zanjan

Arefeh Saiedi; Mir Ali Asghar Mokhtari; Hossein Kouhestani

Volume 9, Issue 1 , June 2018, , Pages 207-229

https://doi.org/10.22108/ijp.2017.82000.0

Abstract

Khanchay-Aliabad area as a part of Tarom magmatic belt contains some shallow depth intrusions which are intruded the Eocene volcanic- sedimentary rocks and have very close association ... Read More Khanchay-Aliabad area as a part of Tarom magmatic belt contains some shallow depth intrusions which are intruded the Eocene volcanic- sedimentary rocks and have very close association with Cu mineralization. The Eocene volcanic- sedimentary rocks include alternation of basalt, basaltic andesite and andesite, various kinds of tuff, tuffaceous sandstone, sandstone, siltstone and occasionally shale. Petrographical studies demonstrate that intrusions are pyroxene quartz monzonite and olivine gabbro in composition. The Khanchay pyroxene quartz monzonite have porphyritic to porphyroidic, hetero-granular to sereitic, ophitic and sub- ophitic textures and composed of plagioclase, clinopyroxene, hornblende, quartz, K-feldspar and biotite. The Aliabad pyroxene quartz monzonite shows porphyritic to porphyroidic textures composing of plagioclase, clinopyroxene and hornblende in the quartz- feldspatic matrix. The Khanchay olivine gabbro is characterized by the presence of coarse grained granular, ophitic and sub- ophitic textures as well as the occurrence of plagioclase, clinopyroxene and olivine. Geochemical studies indicate that the Khanchay- Aliabad pyroxene quartz monzonitic intrusions have SiO2 content varying from 59.58 to 61.34 %. These intrusions have high- K calc- alkaline nature and are classified as I-type metaluminous granitoids. Their similar patterns on spider diagrams are indication of genetic relation of these intrusions. On these diagrams LILEs (Ba, K, Th and Pb) enrichment along with negative anomalies of HFSEs (Nb and Ti) are observed. Moreover, the Chondrite normalized REE patterns demonstrate LREE enrichment with high ratio of LREE/HREE and Lan/Ybn ratio ranging from 3.08 to 3.72. The overall field investigation, petrological and geochemical studies as well as tectonic setting discrimination diagrams confirm that the Khanchay- Aliabad high-K intrusions were formed from a subduction related metasomatized lithospheric mantle in a post- collisional setting.

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Author = Kouhestani, Hossein

Intermediat-sulfidation epithermal Cu (Pb and Zn) mineralization in the Marshoun 2 occurrence (SE Zanjan): Mineralization, geochemistry and fluid inclusions evidences

Abstract

Ti-Fe mineralization in Bafq anomaly no. 15, Central Iran: Insights to mineralogy and mineral chemistry

Abstract

Petrology, geochemistry and tectonomagmatic setting of Zajkan granitoid, Tarom-Hashtjin sub-zone, West of Qazvin

Abstract

Petrology and geochemistry of Granitoids at Khanchay-Aliabad region, Tarom sub-zone, East of Zanjan

Abstract