List of Articles Petrography

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Geological setting of iron oxide-apatite deposits in theBafq ‎district, central Iran with an emphasis on mineralogical,petrographic, and geochemical study of the Sechahun deposit
  Azat Eslamizadeh
  The objective of this research is to determine all processes in the magmatic evolution and related hydrothermal activities that created the volcanic rocks and associated ore-forming systems of the Bafq ‎mining district. Several iron oxide-apatite (IOA) deposits were More

  The objective of this research is to determine all processes in the magmatic evolution and related hydrothermal activities that created the volcanic rocks and associated ore-forming systems of the Bafq ‎mining district. Several iron oxide-apatite (IOA) deposits were investigated in this area with a focus on the Sechahun ore deposit. The Bafq ‎mining district is well known for hosting significant IOA ore deposits with several million tons of iron ore and with some economic resources of rare earth elements. To achieve the goals of this research, detailed petrographic, fluid inclusion microthermometry, and lithogeochemical studies were obtained and supported by geological investigations at both local and regional scales. Textural, mineralogical, and fluid inclusion evidence indicates the ore genesis by fluid mixing. Magmatic-hydrothermal iron oxide-apatite ore precipitated during circulation of deuteric solutions within the host rocks at the early stage of mineralization. The mesothermal iron oxide ore of the Sechahun deposit was emplaced at the relatively shallow depths, while the near-surface epithermal hematite-jaspilite ore formed in a subaqueous environment. The most likely source of iron oxide-apatite mineralization would be a combined magmatic hydrothermal to convective hydrothermal model ‎with magmatism originating from the upper mantle and related bimodal volcanism resulting in felsic volcanic rocks. Rifting of the continental lithosphere during the Early Cambrian was associated with emplacement of a highly fractionated bimodal ‎magmas along the regional ‎fracture-fault lines, a major controlling factor for mineralization processes in the Bafq district. ‎ Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Investigation of reservoir quality of the Kangan Formation based on petrographic and petrophysical studies: A case study of wells "A" and "B" in the gas field of the Tabnak Anticline, SW Iran
  Mohammad Nikbin Mohammad Khanehbad Reza Moussavi-Harami Asadollah Mahboubi Mahdi Khoddami Ehsan Ghofrani
  10.30495/ijes.2020.671658
  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Tectonical history of Arabian platform during Late Cretaceous An example from Kurdistan region, NE Iraq
  کمال حاجی کریم زردشت. ا طاها
  New simplified tectonic models and depositional history of Late Cretaceous rocks are established in a part of Zagros Orogenic Belt that is located in the Northeastern Iraq. These rocks constutes the most important Cretaceous oil reservoir in the Middle East. The depende More

  New simplified tectonic models and depositional history of Late Cretaceous rocks are established in a part of Zagros Orogenic Belt that is located in the Northeastern Iraq. These rocks constutes the most important Cretaceous oil reservoir in the Middle East. The dependent tools are petrography, field study and the concept of drowning phases. This concept is relatively new and accurate in explanation of development of carbonate sequences growth and termination. The columns of both carbonate and clastics rocks of the area are divided into three phases of drowning: 1- Pre-drowning phase of reefal limestone which is represented by Qamchuqa Formation which is equivalent to Mauddud and Shuaba formations (Early Cretaceous) in the south Iraq and in the Gulf. 2- Transitional phase of pelagic limestone and marl deposition which is transitional to post drowning phase during which Gulneri Shale and Dokan limestone Formations (Cenomanian- Turonian) are deposited. 3- Post drowning phase of deep carbonate sedimentation during which Kometan Formation (Santonian-Campanian) and 4- Burial Phase in which Shiranish and Tanjero Formations (Maasstrichtian) are deposited by which Arabian Platform was covered by siliciclastics sediments and main carbonate sedimentation was ended during Campanian. These phases, as resulted from tectonics of Zagros, can replace the complex previously assigned tectonic and depositional history of the area during Later Cretaceous. The application of the phases revealed nearly a continuous history of deposition in foredeep during Early Cretaceous and foreland basin during later ages. This continuous sedimentation is opposite to previously cited episodic sedimentation in the Cretaceous basins. Moreover than that, the occurrences of the previously mentioned subaerial cycles of erosion (unconformities) are not ascertained. The previous cycles had segmented the rocks and history of the area into several separated and unrelated tectonic events that occurred in different basins. According to the above cycles and unconformities the tectonic setting and depositional history of the whole northwestern Iraq assumed be violent during compete time span of the Late Cretaceous by which basin isolation and uplift and erosion occurred. The above ideas are amended and the unconformable boundaries are changed to conformable ones. Consequently, in the present study, a new tectonic history and model are established for Cretaceous which agree with field observation and existed lithofacies. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Preliminary Petrological Studies of Basement Rocks, Thar Coal Basin, Thar Parkar District, Sindh, Pakistan
  Yasmin Rizvi
  The basement rocks encountered in exploratory boreholes drilled for exploration and evaluation of coal deposits in Thar Parkar district, Sindh Pakistan have formed the basis for present studies. The basement complex was penetrated through eighteen boreholes at drill dep More

  The basement rocks encountered in exploratory boreholes drilled for exploration and evaluation of coal deposits in Thar Parkar district, Sindh Pakistan have formed the basis for present studies. The basement complex was penetrated through eighteen boreholes at drill depth range from 112 to 279 meters. These rocks were identified in field as Pink and Grey Granites.. The basement rocks are of Igneous as well as metamorphic origin. The Igneous rocks identified petrographically are Alkali-feldspar Granite, Granodiorite, Rhyolite, Rhyodacite and Aplite while that of metamorphic origin is Plagioclase Hornblende Gneiss. These rocks are termed as Thar Granitoids. The chemical data plotted in various binary and ternary diagrams suggests that the Thar Granitoids are (1) in general peraluminous in nature (2) restricted to psuedoternary minimum at moderate water pressure. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  5 - I-Type magmatism in granitoids from e-ne Tafresh
  Shiva Ansari Mohammad Hashem Emami Majid Ghaderi Khosro Khosro-Tehrani
  The polyphase Nevis granitoid pluton extends 70 km2, is located in Urmieh-Dokhtar zone, shows variationwhich in terms of emplacement depth is related to epizonal to mesozonal environments [16], and in range ofacidic to basic including tonalite, granodiorite, granite, mo More

  The polyphase Nevis granitoid pluton extends 70 km2, is located in Urmieh-Dokhtar zone, shows variationwhich in terms of emplacement depth is related to epizonal to mesozonal environments [16], and in range ofacidic to basic including tonalite, granodiorite, granite, monzonite, diorite and gabbro. The mentioned pluton isintruded to different units of volcano-sediments (according to the 1:250000 Geological Survey map) of Eocenesequences (E1, E2, E3, E4,E5, E6) and has imposed a contact metamorphism in Eocene [3]. Existance of maficenclaves in the main body could confirm the initial basic-intermediate magma replacement. According to thecoarse granular texture of these basic-intermediate rocks can be said that they have been replaced in crust middledepths (mesozonal) and in later stages, a large size of tonalitic magma intruded to the region shows variation intexture. Part of this tonalitic magma get to higher levels and show porphyry textures. Then they involved inmylonitic textures under tectonic stresses. Stress effects produced subgrain minerals and undulose extinction.The final phase of plutonism was made up leucocratic micro-granite and granophyres, comparing to tonalite theyhave limited volume and they are the most shallow plutonism in the area. Another pervasive process had beenthe effects of heat and fluid (hydrothermal process) caused by successive injections which had differentinfluences on the rocks, and created secondary mineral paragenesis of greenschist facies including epidote,chlorite, calcite, albite, sphene and opaque minerals, represent the geothermal system activities in differentphases and the formation history of polyphase Nevis pluton.Based on field surveys, lithology and geochemical, granitoids are I-type. These rocks are calc alkaline andmetaluminous. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  6 - the genesis and origion studies of haji abad granitoid pluton (south of boin zahra)
  elham safarzade mansour وثوقی عابدینی
  Haji Abad granitoid pluton (~90Km²) is located in 135 Km southwest of Tehran , 7 Km south of Boin Zahracity (Fig.1).This pluton with approximate age 39.2(±3.2)Ma [4] emplaced in central of Uromieh – Dokhtar zonerocks .This pluton has a compositional ra More

  Haji Abad granitoid pluton (~90Km²) is located in 135 Km southwest of Tehran , 7 Km south of Boin Zahracity (Fig.1).This pluton with approximate age 39.2(±3.2)Ma [4] emplaced in central of Uromieh – Dokhtar zonerocks .This pluton has a compositional rang of granitoid rocks include syenogranite , monzogranite , granodioriteand granophyr . Under study pluton in view of magmatic series is calk-alkaline , medium to high K and in viewof alumina saturation index is meta-alumine nature .Field , geology , petrography and geochemical study indicatethat these granitoids are High temperature magnetite I-type or Cordiller I- type granitoids . Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  7 - Geological,mineralogical,petrogeraphy and alternation investigation at Kashmar Chalpou-Kalate Chubak antimony deposite
  fatemeh KHakrah Mohammad Lotfi S.J Moghadasi
  The mine area is located in 65km north of Kashmar(Khorasan-e-Razavi province-East Iran)and it forms a part of northeast of Central Iran zone. This area consists of Paleogene terrigenoussediments containing of shale, marl, sandstone and conglomerate with interlayers of p More

  The mine area is located in 65km north of Kashmar(Khorasan-e-Razavi province-East Iran)and it forms a part of northeast of Central Iran zone. This area consists of Paleogene terrigenoussediments containing of shale, marl, sandstone and conglomerate with interlayers of pyroclasticrocks that age of sediments are belonged to Eocene. The faults with East-West trending(parallelwith Doruneh main fault) influenced the region and the formation of this deposit. The mineralogy of deposit is simple and consists of quartz, calcite, stibnite, pyrite, gold, realgar and orpiment. The main type alternations are arjillic, sericitic, pyritization, silicifcation and carbonatization. Field observations, petrography and paragenetic sequences indicate that mineralizationis happened in epithermal vein system. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  8 - Petrography and mineralography of copper deposits in South Kashmar area
  فرانک Fiezi S.E Haghighi-Bardineh
  Dahaneh Siah, Cheshmeh Gaz, Zangalu and Cheshmeh Zelzeleh deposits are located in Kashmar1:250000 geological map in north of Doruneh fault. This area belongs to Sabzevar zone .According tolitho logic studies, the volcanic rocks vary in composition from Basaltic Andesite More

  Dahaneh Siah, Cheshmeh Gaz, Zangalu and Cheshmeh Zelzeleh deposits are located in Kashmar1:250000 geological map in north of Doruneh fault. This area belongs to Sabzevar zone .According tolitho logic studies, the volcanic rocks vary in composition from Basaltic Andesite to Andesitic Basaltand Andesite as host rock and their adjacent rock units are Limestone and Tuffs. The mineralizationare occurred in contraction fractures around the Andesitic clasts and also disseminated in Andesitefractures. Dominant texture in Dahaneh Siah deposit is Porphiritic and Trachytic, Vesicular,Amygdaloidal are distinguished too. Plagioclases vary in composition between Oligoclase andAndesine. Biotite, green and Brown Hornblende have seen together and primary Pyroxenes containDiopside, Augite and Hypersthene. Inclusions of idiomorphic Appetites exist in Fe – Mg minerals orin matrix. Accessory minerals are Magnetite, Esphen and zircon. Vesicles are filled by Calcite,Chlorite and Quartz. Plagioclases altered to Clay minerals in Cheshmeh gaz deposit. The main mineralin Zangalu is Plagioclase and accessory minerals are altered Olivine and Pyroxene. Main minerals inCheshmeh Zelzeleh are Pyroxene and Plagioclase and accessory mineral is the Olivine which isAltered to Ferro oxide and Serpentine. There is no opaque mineral in polished sections of this deposit.Paragenesis of minerals in Dahaneh Siah, Cheshmeh Gaz and Zangalu contain: Magnetite → Pyrite →Chalcopyrite → Chalcocite → Bornite → Hematite → Covellite → Copper → Malachite →Chrysocolla → Lepidocrocite → Limonite. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  9 - Micro facies and sedimentary environment of the Qom formation in Verjun-Khur Abad area
  Keyvan khaksar Masoomeh Sohrabi-mollayousefy Saeed rahmanian
  Qom Formation in the section of Verjun-KHurabad area constitutes 852 meters of limestones in thin layers tothick layers, marl, gypsiferous marl, sandstones, and lime sandstones. Its lower contact (section a) is abrupt andmild unconformity with lower red formation. Its u More

  Qom Formation in the section of Verjun-KHurabad area constitutes 852 meters of limestones in thin layers tothick layers, marl, gypsiferous marl, sandstones, and lime sandstones. Its lower contact (section a) is abrupt andmild unconformity with lower red formation. Its upper contact (section f) is gradual and concordant with upperred formation. Besides sampling, lithology changes, stratigraphy, geomorphology of stone units was examined.The results led to drawn the stratigraphy log of Qom Formation in the studied area. Petrography and microfaciesstudies together with field evidences led to recognition of eight carbonated microfacies in different parts of QomFormation. This microfacies lied on the tidal, barrier, lagoon and open marine environments. The study of faciesand their succession in the mentioned area and compare with modern and old sedimentary environment showsthat Qom Formation was deposited in a warm marine environment. Also, the facies of Qom Formation in thestudied area was deposited in a carbonated ramp environment Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  10 - Mineralography and petrography studies in Kahang exploratory zone
  Maryam Farmahini Farahani Ahmad Khakzad Hooshang Asadi Mohammad Hashem Emami Iraj Rasa
  Kazerun covers one of the most precious and beautiful natural regions of Fars Province. Parishan Conservative,part ofwhich is on the east of Kazerun, is located in Kouhmareh, Nodan and Gerearea. Parishan Lake is alsocalled Famour. This comes from the name of the spring More

  Kazerun covers one of the most precious and beautiful natural regions of Fars Province. Parishan Conservative,part ofwhich is on the east of Kazerun, is located in Kouhmareh, Nodan and Gerearea. Parishan Lake is alsocalled Famour. This comes from the name of the spring which is the Lakes main source of water. The sceneryduring spring and fall is very attractive, and the green and flower fields around the lake and presence of wildbirds make a very astonishing natural resort. This lake has been registered as an international pond in RamsarConvention (1971) and as a conservative region in the classification of regions. In this article, a brief study of theanimals and plants specifications of Parishan Lake before fire and also the effective factors on its destruction arepresented. At the end, there is report on the current conditions of the lake after the fire. The Methodologyincludes documentary as well as field study Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  11 - Petrography, Geochemistry and Tectonomagmatic Setting of the intrusive bodies of Jasb area
  R. Mohammadi ناصر Ebadati
  The Jasb area is located about 100 Km of South of Qom in Urmiyeh-Dokhtar magmatic belt. Thescattered plutonic rocks belong to Eocene-Oligocene and Miocene. The plutonic rocks’ typeVariations are granite, quartzmonzonite, tonalite-granodiorite ,quartzmicrodiorite, More

  The Jasb area is located about 100 Km of South of Qom in Urmiyeh-Dokhtar magmatic belt. Thescattered plutonic rocks belong to Eocene-Oligocene and Miocene. The plutonic rocks’ typeVariations are granite, quartzmonzonite, tonalite-granodiorite ,quartzmicrodiorite, and gabbrodiorite.The petrographic studies revealed that the textures of plutonic rocks are mainly granular andsometimes graphic or porphyritic. The magmatic series of intrusive rocks except gabbrodiorite types(toleitic) are calk alkaline and metaaluminums. Probably, the small massive granite rocks in theinvestigation area are I - type granite. The Rocks in this area compositionally belong to the tectonicalregime of the VAG and SynCOLG. Considering change in abundance of minerals such as pyroxene,magnetite, amphibole, biotite, plagioclase and feldspar in the intrusive rocks, hence, it is indicative ofsuccessive process of differentiation in intermediate magma, and ultimately creating variation inlithology. According to the analysis results, the geochemical diagrams were drawn and interpreted.Defining the lithology of intrusives, the tectonomagmatic condition, magmatic series, and geochemicalvariations are the results of geochemical and petrologic studies of intrusives in the area. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  12 - Petrography and its Function for Investigation of Archaeological Materials (a Case Study: Stone )
  Hamid Amanollahi
  Archeology, like any other scientific field of study, is on the move to fundamental changes and evolution, in a way that its transformed view might appear unfamiliar for archeologists belonging to last generations, or those unaware of its recent extensive advancements i More

  Archeology, like any other scientific field of study, is on the move to fundamental changes and evolution, in a way that its transformed view might appear unfamiliar for archeologists belonging to last generations, or those unaware of its recent extensive advancements in two decades. The most important step in promoting archeology was the adoption of archaeological field methods based on scientific principles, with specific issues of cultural studies, field tests and theory making (hypothesis) that is common in all the fields of science today. Thus, the expansion of archaeological science in recent decades and increasing attention to the interaction and the role of environmental resources - and its role in human activities as well as creation of archeological monuments – caused archeologists to be in need of other fields of science, especially basic science and engineering. About fifty years of cooperation of scientists in archeological fields such Geoarchaeology, Paleoethnobotnay, Archaeozoology, Archaeobiology, etc. as a research group, has given a new form to this branch of science. Therefore, having a group of archaeological and geological experts altogether has enhanced the analysis. In this paper it is attempted to discuss the importance of interdisciplinary sciences, methods of recognizing, and the importance of identifying rocks and archaeological studies.  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  13 - Metallurgical Studies on Samples From Central Zagros, Northern Kuhdasht
  Soraya Elikay Dehno Taymour Akbari Morteza Gravand Faramarz Rostami Charati Fereshte Rahimi
  10.30495/jaa.2022.694797
  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  14 - Investigation of the Pumice Additive Effect in Azarshahr Region on Mechanical Properties and Self-compacting Concrete Performance
  Farhad Pirmohammadi Alishah Ayub Khandaghi Mehdi Mohammadrezaei Sattar Shafiei
  10.30495/geotech.2022.692951
  Manuscript profile