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Investigation on the Geochemical Distribution of REE and Heavy Metals in Western Part of Jalal-Abad Iron Ore Deposit, Zarand, SE of Iran

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Open Journal of Ecology 2015年第9期5卷 460-476页

作者： abdollah yazdi Sajad Ziaaldini Rahim Dabiri Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran Department of Geology Science and Research Branch Islamic Azad University Tehran Iran Department of Geology Mashhad Branch Islamic Azad University Mashhad Iran

The Jalal-Abad iron ore deposit, with a reserve of more than 200 Mt ore, is located in NW of Zarand region, southeastern Iran. The ore deposit occurs in the form of an elongated lens-shaped body incorporated in a folded structure of Rizu volcano-sedimentary unit. Mineralization occurred mainly in siltstones, acidic volcanic rocks and dolomitized limestones. The ore minerals include magnetite, hematite, pyrite, chalcopyrite, goethite, malachite and azurite. Chloritization and silicification are the two most widespread alteration types in the Jalal-Abad area. Cu and Ti are among the associated elements with iron in the ore samples. In comparison, the concentrations of Cu, Ti and REE are relatively low in the samples analyzed. The combined concentrations of Ce, La and Y show that geochemical background values for most areas have been measured. The Pearson correlation coefficient values and the results of cluster and principal component analyses indicate a strong correlation between REE, La, Ce, and Y with Sr in the same geochemical group suggesting a common source for these elements. A close association between Cu and Cl with metasomatic host rock and among Pb, Zn and Ba with carbonate host rocks is observed.

关键词： REE Heavy Metals Iron Ore Deposit Jalal-Abad Zarand

Biozonation and Paleobathymetry on Foraminifera Upper Cretaceous Deposites of Central Iran Basins (Isfahan, Baharestan Section)

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Open Journal of Geology 2014年第8期4卷 343-353页

作者： Bita Ghasem Shirazi Lida Bakhshandeh abdollah yazdi Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran Department of Geology Science and Research Branch Islamic Azad University Tehran Iran

In this study Late Cretaceous stratum in central Iran, Baharestan section in Isfahan area, was evaluated by biozonation and paleobathymetry.?These sediments have 89 meters thick, and strata have been formed of marl and marl limestone. In order to indicate the ancient depth of Upper Cretaceous at this time, planktonic and benthic foraminifera were studied. The percentage of the total planktonic foraminifera to the whole sample of foraminifera after the removal of indwell benthic foraminifera (%P*) using the formula?D?=?e(3.58718 + (0.03534?×?%P*))?was identified and depth of 200 - 450 meters was achieved for them. In the present investigation, 30 planktonic species of 11 genus have been identified. The Upper Cretaceous deposit was divided to 6 biozones on the basis of planktonic foraminifera which are cosmopolitan and consist of: Biozone 1—Marginotruncana sigali-Dicarinella primitiva?partial range zone;?Biozone 2—Dicarinella concavata?interval zone;?Biozone 3—Dicarinella asymetrica?total range zone;Biozone 4—Globotruncanita elevata?partial range zone;Biozone 5—Globotruncana ventricosa?interval zone;Biozone 6—Radotruncana calcarata?interval zone.?Based on planktonic foraminifera, the Upper Cretaceous sediments in the study area are of the Turonian-Late Campanian ages.

关键词： Biozonation Foraminifera Central Iran Paleobathymetry Turonian Late Campanian

Dasht-e Lut in Iran, the Most Complete Collection of Beautiful Geomorphological Phenomena of Desert

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Open Journal of Geology 2014年第6期4卷 249-261页

作者： abdollah yazdi Mohammad Hashem Emami Seyed Mohsen Shafiee Department of Geology Islamshahr Branch Islamic Azad University Islamshahr Iran Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran

Given special tectonic and climatic conditions, Iran has the most diverse land-forms and beautiful geological phenomena, which could attract many scientific, adventurous tourists and geological researchers. The present study aims at studying and introducing wonderful geomorphological attractions and numerous geotourism potentials of very hot paradise of the earth, e.g. Dasht-e Lut of Iran, a desert which contains a collection of exclusive desert relieves and geological and geomorphological records of the world. Such unique perspectives as the biggest Nebkhas of the world, the largest Yardangs or Kaluts of the world, the hottest point of the earth, as well as rare species of desert structures such as salt marshes and salt polygons, Gandom Beryan Hill, massive sand dunes, Barchans, clay zones in pretty shapes, saline river , etc., present a vast and diverse extension of geographical beauties and phenomena of the desert. Using library studies, interpretation of satellite images and field studies, this study has been conducted. The results of the studies show that Lut Desert has considerable capability for carrying out complementary studies as well as effect on economic development process in national and international levels. In addition, geotourism development obstacles in Lut Desert are identified, and such solutions as development of ways for access to attractions, erection of geotourism development centers, advertisement and introduction of the desert's attractions, dispatch of guides with tourists, promotion of the region security, extension of accommodations and… for better use of the potentials of the desert, are provided. Furthermore, towards developing the region geotourism, some other fun and exciting activities such as sand skiing, racings and desert rallies, endurance cycling, sun bath, star observation, camel riding and so on, are suggested. Obviously, having various desert attractions and multiple geotourism potentials, Dasht-e Lut has the capability of b

关键词： Geomorphology Geotourism Dasht-e Lut Deserts Kalut Iran

Petrology of Intrusive Bodies of Azizabad-Tinamo Area in the South of Songour, Iran

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Open Journal of Geology 2016年第12期6卷 1567-1579页

作者： Siavash Gholizadeh Mohammad-Ali Arian Mahammad-Reza Jafari abdollah yazdi Department of Geology Faculty of Sciences North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran

In terms of structural divisions of the Iran’s earth crust, the studied area is considered as a part of the Sanandaj-Sirjan structural zone and Zagros Thrust. In this area, there are two gabbroic-dioritic and syenitic igneous intrusive bodies. The host rocks of these intrusive bodies are upper Cretaceous limestones and formed by contactmetamorphism at the contact zone between hornfels rocks and skarn. Field and geochemical datasets represent that all various rocks within these intrusive bodies have been originated from the same magma. The process of fractional crystallization and probably a small amount of contamination and assimilation has also played a role in the evolution of parent magma. Generally, these magmas are sub-alkaline and lie in themagmatic range of tholeiitic and calc-alkaline series. Samples investigated are metaluminous and peralkaline.

关键词： Syeniteintrusive Bodies Gabbro-Diorite and Granite Sub-Alkaline Metaluminous

Geological and Geotourism Study of Iran Geology Natural Museum, Hormoz Island

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Open Journal of Ecology 2014年第11期4卷 703-714页

作者： abdollah yazdi Mohammad Ali Arian Mahmoud M. Rezapour Tabari Department of Engineering Shahrekord University Shahrekord Iran Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran Department of Geology North Tehran Branch Islamic Azad University Tehran Iran

Iran is a country that benefits from nice nature, diverse continent, areas full of unique geological phenomena. Thus, it is necessary to study these attractions for better recognition of them. In this regard, Hormoz Island with valuable geoheritage, biodiversity, cultural, historical and political diversity is very important. The accumulation of these attractions and its being located in Persian Gulf strategic area made it of considerable significance in national and international communities. Hormoz Island is a spherical salt dome which is located in Hormoz strait. This Island is composed of evaporites, igneous rocks and sedimentary rocks, and sediments mainly belong to Mishan and Aghajari formations and salt, gypsum and, to a lesser extent, limestone evaporites. In sedimentary formations of Hormoz, Aouthigenic minerals such as Pyrite, Dolomite, quartz, Anhydrite, gypsum and halite are frequently seen. Mineralization of volcanic leads to formation of high temperature minerals, such as oligiste, pyroxene, amphibole and low temperature and hydrothermal minerals such as Pyrite, quartz... in the tracks of igneous rocks. This unique geodiversity in rocks and mineral which made various colors in Hormoz Island made it a mineraogical reservoir. Beside considerable mineralogical attractions, there are other potentials like ochre mine, coral reefs, rock seashore, sea caves, salt caves, plant cover and wild life which have added to various tourism capabilities of this Island and made it a unique place in the world. This paper studies Hormoz Island in terms of geological features and geotourism potentials.

关键词： Salt dome Geology Geodiversity Geotourism Hormoz Island Iran

Chemistry of Minerals and Geothermobarometry of Volcanic Rocks in the Region Located in Southeast of Bam, Kerman Province

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Open Journal of Geology 2017年第11期7卷 1644-1653页

作者： abdollah yazdi Afshin Ashja-Ardalan Mohammad-Hashem Emami Rahim Dabiri Mohammad Foudazi Department of Geology North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Islamshahr Branch Islamic Azad University Tehran Iran Department of Geology Mashhad Branch Islamic Azad University Mashhad Iran

In this paper, tectonic and geothermobarometric environments have been studied with respect to the combination of pyroxene, olivine and plagioclase in volcanic rocks in the southeast of Bam. The combination of volcanic rocks in the region consists of olivine basalt, basalt, alkaline basalt, andesite, trachyandesite and pyroxene andesite. This combination is the result of the processes of crystallization and sometimes contamination. Plagioclase, clinopyroxene, olivine, and amphibole constitute the major minerals (rock forming minerals) in these rocks. Porphyritic to mega-porphyritic textures with microlithic, glumero-porphyritic and amigdaluidal matrix are observed. Based on the thermometric calculations, plagioclase, pyroxene, and olivine minerals and the rocks of this region are crystallized at a pressure of 1.5 to 7 kb and temperatures ranging from about 700°C to 1250°C.

关键词： Plagioclase Pyroxene Geochemistry Thermo-Barometry Volcanic Rocks Bam

Petrology and Geochemistry of Dikes in the North of Saveh in Iran

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Open Journal of Marine Science 2016年第2期6卷 210-222页

作者： Mohammad-Hassan Bazoobandi Mohammad-Ali Arian Mohammad-Hashem Emami Gholamreza Tajbakhsh abdollah yazdi Department of Geology Faculty of Science North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Faculty of Science Islamshahr Branch Islamic Azad University Tehran Iran Department of Geology Faculty of Science Yazd University Yazd Iran Department of Geology Faculty of Science Kahnooj Branch Islamic Azad University Kerman Iran

Dikes in the north of Saveh are located in a region with an area of approximately 200 square kilometers, in a distance of approximately 100 kilometers south of Tehran. Dikes mentioned in terms of petrological composition, are divided into two categories: alkaline and intermediate to acidic. Alkaline dikes include: andesitic basalt and andesite and intermediate to acidic dikes include: trachyte and trachyandesite. In terms of geochemical, dikes in the north of Saveh have a dual nature of alkaline and calc-alkaline. Both groups are derived from more enrichment source than primitive mantle. Despite similarity of pattern of both groups, varieties of alkaline having less silica, in the elements Sr, Ti, Nb and Ta show more enrichment and in the elements Hf, Rb, Th, K show less enrichment than varieties of calc-alkaline.

关键词： Swarm Dikes Alkaline and Calc-Alkaline Saveh Iran

Geochemistry and Petrogenesis of Intrusive Pluton in North of Golpayegan (Central Part of Sanandaj-Sirjan Zone)

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Open Journal of Geology 2014年第9期4卷 481-494页

作者： Marzieh Shahpari Afshin Ashja Ardalan Mohammad Hashem Emami Mohammad Ali Arian abdollah yazdi Department of Geology Faculty of Sciences North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Eslamshahr Branch Islamic Azad University Eslamshahr Iran Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran

Granitoid pluton in the north of Golpayegan is located in10 kmnorth of Golpayegan at SanandajSirjan zone. Dominant rocks of this region include granite, syenite, and gabbro. Granite type is granular with medium to coarse crystals and its mineralogical composition contains alkali feldspar + quartz + plagioclase + biotite + secondary minerals (opaque + sphene + apatite). Granite rocks have calc-alkaline and?metaluminous to peraluminous nature, relative enrichment of Rb over Sr, and relative enrichment of LILE over HFSE elements. These granites, which are type I, are derived from the melting of metagreywackes and their tectonic setting is of upper continental crust and post-orogenic setting. Gabbroic type is older than other types of the pluton and is granular with medium to fine crystal. Mineralogical composition of these rocks is plagioclase + pyroxene + amphibole + biotite + secondary minerals (opaque). Based on geochemical characteristics of tholeiitic and metaluminous nature, relative enrichment of Ba and Sr elements over Rb, relative enrichment of LILE elements over HFSE, negative anomaly of Nb, Ba, and Ta, and positive anomaly of Pb are observed. Origin of this type is probably from enriched mantle and in-plane tectonic setting.

关键词： Granitoid Sanandaj-Sirjan Zone Golpayegan

Geodynamics of Dikes in North of Saveh

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Open Journal of Ecology 2015年第9期5卷 452-459页

作者： Mohammad-Hasan Bazoobandi Mohammad-Ali Arian Mohammad-Hashem Emami Gholam-Reza Tajbakhsh abdollah yazdi Department of Geology Faculty of Science North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Faculty of Science Islamshahr Branch Islamic Azad University Tehran Iran Department of Geology Faculty of Science Yazd University Yazd Iran Department of Geology Faculty of Science Kahnooj Branch Islamic Azad University Kerman Iran

Dikes can be divided into sheeted, feeder, cone and swarm types based on the origin and the formation. A group of dikes that are formed in dense in a relatively broad zone influenced by a particular tectonic regime are referred to as swarm dikes. Swarm dikes have numerous applications such as locating mantle plume centers, determining areas of longstanding tensions and detection of deformation networks. The purpose of this article is classified swarm dikes of “North of Saveh” based on previous studies. In one study, swarm dikes are classified based on their initial geometry into five types of I, II, III, IV and V. According to this classification, our study has been shown that the dikes in north of Saveh are of type IV. In another study, the swarm dikes are classified into three types: parallel, large radial and small radial. According to the classification, our study has been shown that the dikes of North Saveh are parallel that have arisen by tensions caused by the collision of the Arabian plate and the Central Iran plate. In addition to original tensions in the region, local faults have been effective on the arrangement and the establishment of dikes.

关键词： Swarm Dikes Locating Mantle Plume Dikes in North of Saveh Dikes Classification