Mohammad Lotfi

Islamic Azad University | IAU · Department of Geology

Magnetite mineralization accompanied by minor hematite, pyrite, chalcopyrite, tetrahedrite, tennantite, and goethite, occurs in the Guydash iron skarn deposit in East Azarbaijan province, Iran. Geologically, it is located in the northwestern part of the Sanandaj-Sirjan zone. The skarn was formed by the intrusion of igneous bodies, especially porphy...

The Shadan porphyry copper-gold deposit is located in the eastern margin of Tertiary volcano-plutonic belt of the Lut block. Hydrothermal Magmatic solutions of granite-granodiorite stock porphyry rocks that are generally intruded in the Eocene volcanic rocks resulted in vast potassic, potassic-phyllic, argillic and propylitic alterations in the are...

The Guydash Fe deposit is located in the south of East Azerbaijan Province, 27 km southwest of Qara Aghaj city at the northwestern tip of the Sanandaj-Sirjan zone. This study was conducted to study the mineralogy of the ore and the geochemistry of the intrusive bodies producing skarn mineralization. A set of granitoids with porphyry diorite-monzodi...

The target of this research is recognition of the alteration zones utilizing concentration-area fractal methodology according to the reflection of the main minerals of each alteration zone that enhanced by Spectral Feature Fitting (SFF) method due to Advanced Space-borne Thermal Emission and Reflection Radiometer (ASTER) satellite images in Saryazd...

The vein-type Chomalu polymetallic epithermal deposit, located in the Tarom-Hashtjin Metallogenic Province (THMP), western Alborz, formed in two separate mineralized zones controlled by fault zones within andesite and olivine basalt host rocks. The deposit occurs adjacent to the Varmarziar quartz monzonite, quartz monzodiorite, and monzosyenite int...

The Band-e-Narges magnetite deposit is located in the central part of Urumieh–Dokhtar Magmatic Arc. Wide I-type calk-alkaline and alkalin magmatic activity in the Koh-e Latif region has been reported due to Eocene intrusive processes in UDMA. Five stages of paragenesis have been observed in the mineralization in this area: prograde stage, retrograd...

The study area is located 5 km southwest of Mahdasht city in Karaj on the Urmia-Dokhtar magmatic arc. In this area, Eocene volcanic and pyroclastic rocks are observed including basaltic andesite lavas, andesite, Trachyandesiticand trachyte lavas, tuff, and ignimbrite, along with plutonic rocks. There are two spectra of basic and acidic for the rock...

The mineral zone under study is 32 square kilometers located in Chagho village, Akhtarabad village, Malard county, Shahriar city, Tehran province. This area is part of the Urumieh-Dokhtar Volcanic Belt. The age of the studied rocks is related to the Eocene and younger than the Eocene. The downward trend of some oxides of major elements such as MgO,...

The present study was conducted to determine different geochemical anomalies of rare earth elements (REEs) using a combined approach of stepwise factor analysis (SFA), sequential Gaussian simulation (SGS) ,and concentration-area (C-A) fractal modeling based on surface lithogeochemical samples obtained from the Esfordi phosphate mine (Central Iran)....

This study is aimed to determine geochemical anomalies of rare earth elements (REEs) and provides a concentration distribution map for the Esfordi phosphate deposit (EPD), Bafq metallogenic province (BMP), Central Iran. With an average grade of 5519 ppm for REEs, the EPD is one of the prominent deposits of the region. In this research, sequential G...

Main aim of this study is to propose a developed zonality index for Cu–Mo porphyry deposits based on staged factor analysis with Number-Size (N–S) fractal model. This method was used in an Iranian porphyry system as named Serenu (SE Iran). The developed zonality index was a ratio between factors related to major and minor ore elements based on i...

The IIC deposit area to the east of the Bafq region exposes rocks that comprise the part of the Central Iran continental terrane. The IIC deposit iron orebodies are magmatic-related hydrothermal deposits that, when considered collectively display a vertical zonation from high-temperature, magmatic ± hydrothermal deposits emplaced at moderate depths...

Shadan copper-gold deposit is located in nearly 65km Southwest of Birjand. The area is a part of eastern margin tertiary volcanoplutonic belt in Lut Block. The oldest units in this area are tertiary andesite, tuff, rhyolite, and rhyolitic tuff. The units are intruded by late Eocene–Oligocene quartz monzonite-granodieritic (Shadan porphyry), granite...

This study proposes the application of a hybrid methodology combining the Best-Worst Method (BWM) and Additive Ratio Assessment (ARAS) approaches to mineral prospectivity mapping. The ARAS approach is used to prioritize and rank individual cells. The BWM, on the other hand, is useful for assigning weights to the spatial proxies of the mineralized s...

In this paper, sequential Gaussian simulation (SGS) and number–size (N–S) fractal modeling were used for copper geochemical anomaly mapping in the western part (training area) of Kuhsiah-e-Urmak area, Iran. Then, according to the generated anomaly model in the training area, mineral potential mapping (MPM) was performed for the entire study area ba...

The Urumieh-Dokhtar Magmatic Belt (UDMB) is the host of many Iranian Cu porphyry deposits. The southern part of this belt, in the Jebal-Barez area, has been less investigated due to the mountainous and rough topography as well as some security confrontations. Porphyry deposits are associated with hydrothermal alteration zones, which can be mapped u...

Introduction Manganese deposits are classified as hydrogenous, diagenetic and hydrothermal deposits based on their mineralogy, chemical composition, and tectonic setting (Hein et al., 1997). Hydrogenous manganese deposits have slowly precipitated from seawater (2-10 mm/Myr) (Ingram et al., 1990). These deposits contain iron and are poor in manganes...

Gardaneshir Pb–Zn deposit is hosted by dolomitic carbonates which is located in the SW Ardestan, central Iran. Ore body is stratabound type in this deposit. Primary ores in this type are composed of sphalerite, galena, barite and quartz with massive, banded, veined and disseminated structures. Evaluation of ore-grade at the Gardaneshir Pb-Zn deposi...

https://www.gsjournal.ir/article_84248.html

The metallogenic zone of the Bafgh-Saghand in central Iran hosts huge low-titanium iron oxide-apatite (IOA) deposits (also called Kiruna type iron deposits) with more than 1500 Million tons grading 55% iron. The genesis of these deposits including Chadormalu, Choghart, She-chahun, and Esfordi has long been a subject of debate. In this regard, sever...

The Origin of Iron Oxide-Apatite deposits (IOA) with low Ti or Kiruna type deposits has long been a matter of debate. In this case, several origins have been proposed for these deposits which include: magmatic, magmatic-hydrothermal, hydrothermal, banded iron formations, and sedimentaryexhalative. Bafq-Saghand metallogenic zone is located in centra...

Dehoo manganese deposit is located 52 km to the south of Zahedan in Sistan and Baluchestan Province, southeastern Iran. This deposit that lies in the central part of the Iranian Flysch Zone is lenticular in shape and lies above the micritic limestone-radiolarite cherts of the upper Cretaceous ophiolite unit. It is hosted within the reddish to brown...

The aim of this paper is to delineate the different lead–zinc mineralized zones in the Zardu area of the Kushk zinc–lead stratabound SEDEX deposit, Central Iran, through concentration–volume (C–V) modeling of geological and lithogeochemical drillcore data. The geological model demonstrated that the massive sulfide and pyrite+dolomite ore types as m...

The XIV iron-oxide prospect in the northern part of the Bafq mining district is hosted by intrusive rocks and demonstrates similar characteristics with Kiruna mineralization. The plutonic complex of the XIV prospect is composed of two major types of intrusive rocks, including: 1) a granitic intrusive body which is itself composed of two types; a pa...

This paper presents an overview about the XIV iron-oxide prospect which is located in the Bafq mining district, central Iran. The prospect and its host rocks were investigated by field observations together with mineralogical and geochemical studies. According to these investigations, the XIV prospect is similar to Kiruna-type iron deposits and dem...

This study aims at prospecting copper and gold promising areas in Saveh 1:100,000 sheet, situated in Urumieh-Dokhtar magmatic belt (Central Iran). Geographic information system (GIS) is effective in recognition of probable mineral resources by collecting, processing, exploration layer weighting and integrating thematic maps. As there is no certaint...

The aim of this study is to separate and subsequently determine geochemical anomalies for exploration of Cu mineralization in Noubaran 1:100,000 sheet, situated in the Urumieh-Dokhtar magmatic belt, Center of Iran. To do this, stepwise factor analysis and also a Concentration-Number (C-N) fractal modeling were used. Stepwise factor analysis can be...

The aim of this research is the separation of the airborne geophysical anomalies of uranium (U) and thorium (Th) using concentration–area (C–A) fractal method in the Saghand area, Central Iran. At the first step, the C–A log–log plots of U and Th were generated and their thresholds were identified. The U and Th log–log plots obtained from the C–A m...

The aim of this study is to delineate the main Ni geochemical anomalies using concentration-perimeter (C-P) and concentration-number (C-N) fractal modeling based on lithogeochemical data in the Patang area, Eastern Iran. Results obtained by the C-P and C-N fractal modeling revealed that the extreme and high anomalies for Ni are located in the SE an...

The Khalyfehlou deposit is one of volcanic-hosted vein-type Cu deposits located in the Tarom metallogenic zone, NW Iran. The host rocks are part of an Eocene volcano-sedimentary sequence formed into a NE–SW trending anticline with the Khalyfehlou deposit in its axis. The main ore minerals are chalcopyrite, bornite, chalcocite, and covellite and the...

The Sangan manganese deposit is located 28 km northeast of the Khash city (Southeast of Taftan volcano) in the Sistan&Baluchistan province. Structurally and lithologically, this deposit lies in the central part of Iranian flysch zone. The ore body is layer in shape and lies above the Shale with intercalation meta sandstone - lithic tuffs of the Qua...

The Kehdolan area is located at 20 kilometers to the south-east of Dozdozan Town (Eastern Azarbaijan Province). According to structural geology, volconic rocks are situated in Alborz-Azarbyjan zone, and faults are observed in the same direction to this system with SE-NW trend. The results show that kaolinite alteration trend with Argilic and propyl...

The aim of this research is the separation of the airborne geophysical anomalies of uranium (U) and thorium (Th) using concentration–area (C–A) fractal method in the Saghand area, Central Iran. At the first step, the C–A log–log plots of U and Th were generated and their thresholds were identified. The U and Th log–log plots obtained from the C–A m...

The mineralized veins at Nikuyeh are located south of the Tarom-Hashtjin metallogenic province in Alborz-Azarbayejan (Western Alborz). Rhyodacite and andesite/andesitic basalt volcanic rocks are hosting the vein mineralization in the Nikuyeh ore district. Alteration in Nikuyeh ore district is consisting of propylilitization, sericitization, argilli...

Boznein manganese deposit is located in 25 km south-southwest of Ardestan, part of Urmiyeh-Dokhtar magmatic belt. The main units in the studied area are volcanic-pyroclastic sequences & intrusive bodies of middle Eocene-lower Oligocene. Porphyroid rhyolitic dome (upper Eocene-lower Oligocene) is host rock of economic Mn mineralization. The minerali...

This study uses the C–V fractal model to separate mineralization zones especially enriched supergene and hypogene protore in an Iranian Pb–Zn carbonate hosted deposit, based on subsurface data. The Tangedezan deposit is located in central Iran. In order to separate the two major mineralization zones in this deposit, log–log plots of major elements...

Vein type Mn deposit of Boznein has penetrated into the deeply and Traverse fault in porphyryr Ryolite-Hosted and it is noteworthy as vast and variety mineralography. XRD, XRF and electron microprobe analysis (EMPA) methods has been detected follow ore minerals: Spessartine, Rhodochrosite, Bixbyite, Hausmannite, Braunite, Pyrolusite, Psilomelane, C...

The Galali iron deposit are located in northwest Hamedan and Sanandaj-Sirjan geological structural zone. the host rocks of these deposits are metavolcanosedimentary successions of Songhor stratigraphic series with permo-trriassic age. field investigation, ore geometry, textures and structures and paragenetic sequence of minerals, all indicates that...

Baba-Ali and Galali iron deposits in west of Hamedan are emplaced within the Songhor volcano-sedimentary sequence of Sanandaj-Sirjan geological-structural zone. Mineralography and SEM-EDAX analyses on magnetite iron ores at both deposits for better understanding of mineralogy and crystal-chemistry of the ores have shown some interesting results. St...

Several important characteristics such as suitable parent rocks, hydrodynamics system for carrying uranium complexes and pervious sedimentary layers play key role for transportation and deposition of soluble uranium. In this paper, we present the results of investigations of parent rocks and host rock of sedimentary uranium in Razgah region to exa...

Several important characteristics such as suitable parent rocks, hydrodynamics system for carrying uranium complexes and pervious sedimentary layers play key role for transportation and deposition of soluble uranium. In this paper, we present the results of investigations of parent rocks and host rock of sedimentary uranium in Razgah region to exam...

The Emarat deposit, with a total proved reserve of 10 Mt ore grading 6% Zn and 2.26% Pb, is one of the largest Zn–Pb deposits in the Malayer–Esfahan belt. The mineralization is stratabound and restricted to Early Cretaceous limestones and dolomites. The ore consists mainly of sphalerite and galena with small amounts of pyrite, chalcopyrite, calcite...

Baba-Ali and Galali iron deposits are located west of Hamadan, within the Sanandaj-Sirjan geo-structural zone. Mineralogy and crystal-chemistry of the ore bodies using 57 analyses on the magnetite iron ore by SEM-EDAX method lead to some interesting results. Detecting the concentration of some trace elements such as V, Co, Ni, Cu, Cr, Ti, Au, PGE (...