Abdollah Yazdi

Kahnooj Branch, Islamic Azad University, Kahnooj, Iran · Department of Geology

One of the widely used methods for improving the engineering performance of problematic soils is in-situ or ex-situ mixing using various additives (conventionally cement and lime). In this research, the combination of nano-silica (NS) and lime additives is investigated for improving the geomechanical characteristics and engineering performance of s...

Collapsing soils are among the problematic soils in geotechnical engineering. These soils have a relatively good resistance in their natural state with low humidity, but in case of saturation without change in the incoming load or subjected to vibration force, they settle a lot and in many cases, it will cause cracking or destruction of foundations...

Middle-Upper Eocene volcanic and volcano-sedimentary rocks of the Torud region have been formed by the sequences of basic-intermediate lavas, pyroclastic rocks, and sedimentary layers (e.g., siltstone, sandstone, and nummulite-bearing limestone) within a shallow marine basin. According to microscopic studies, the volcanic rocks of the region includ...

One of the seismic geotechnical phenomena is the occurrence of liquefaction in soil layers. This phenomenon occurs in non-dense saturated silty sandy sediments in which the saturated soil completely loses its strength and hardness due to the intense stress applied to it and behaves like a liquid. This stress can be due to earthquakes or sudden chan...

Morphological analysis for extracting lineaments has widespread applications in tectonic and structural studies, hydrogeology, speleology, mineral exploration, and other related sciences. In this regard, aerial photographs, satellite images, and digital elevation models (DEMs) are widely used in these studies. One of the most common techniques for...

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 Cretaceous Moro Formation from the Rakhi Nala section Dera Ghazi Khan has been studied in detail to investigate the Sedimentology and provenance. This paper describes the litho-facies changes, depositional environment, and provenance analysis of the Cretaceous Moro Formation from the Rakhi Nala section, eastern Sulaiman Range. The studied Forma...

The breadth of the field and the variety of underground engineering projects have made tremendous progress in design as well as in execution. A special feature of underground works is its strong impact on the geological situation. Due to the incompatibility of land conditions and variety of conditions, based on observations and results of statistic...

Leaking tanks may lead to severe contamination of their surrounding soil. The geotechnical behavior of the soil varies with the physicochemical processes that occur between the contaminant and the soil. Such a change may alter soil behavior and reduce its bearing capacity. In this respect, studying the geochemical properties of gasoline-contaminate...

Minerals from representative samples were analyzed at University of Tasmania (UTAS), Australia with a Cameca Sx-100 electron microprobe with combined WDS and EDS systems. A range of natural minerals were used as standards. The microprobe operated with a 5μm beam diameter, an accelerating voltage of 20 kV and a beam current of 15 nA. Precision, as i...

Considering that most of the development projects, directly are involved with the rock and stone as construction materials, Anon (1977), and Sowers (1975) investigated the characteristics of engineering geology of stone. Genou Mountain, three kinds of limestone from three different formations were investigated lithologically, and by defining the ph...

Relying on the magnetic fabrics study, Anisotropy of Magnetic Susceptibility (AMS) enjoys a special status in determining the mechanism and model of emplacement of intrusive rocks. Parameters resulted from AMS study is based on behaviors of magnetic minerals. The most important function of magnetic anisotropy measurement is to analyze rocks’ petrof...

This paper elucidates the compositional studies on biotites and plagioclases in granitoid rocks of Torud area to understand the geotectonic setting and geothermobarometry conditions. The Torud granitoids with Oligocene age are composed of quartzmonzonite to granite. The main minerals of granitoids are quartz, plagioclase, and K-feldspar. Other cons...

The area is located in northwest of Isfahan, 30 kilometers south of Kashan District, and southern section of Qamsar. The longitude of the area of study is 51º, 19′, 13 ″, E to 51º, 26′, 26 ″, E and its latitude is 33º, 34′, 24 ″N to 33º, 44′, 24 ″N. The rocks of the Qohrud batholithic mass and its enclaves are more quartz monzonite. The rocks are p...

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,...

In the southeast of Iran (SE Bam), there is a collection of volcanic rocks with andesite, basalt and trachyandesite composition. The textures of these rocks are often porphyritic with microlithic, porphyric cavity, and sometimes glomeroporphyritic, sore throat trachytic. Main minerals include olivine, clinopyroxene, plagioclase and secondary minera...

Mount Genou is located north of Bandar Abbas (southern Iran). In terms of geological divisions of Iran, this area is located in the Zagros zone. Carbonate rocks form a large part of the rocky cover of this anticline. Since carbonate rocks are used in most construction projects, it is therefore necessary to determine their quality. The results show...

The study area is located in Lavasanat District in the northeast of Tehran in Central Alborz zone. The outcrops are mainly linked to Karaj Formation, which belongs to the upper Eocene to Oligocene periods. In the study area, there are various plutonic rocks that are identified in the form of numerous dike and sill on the ground. These sills are inj...

Siah Kooh area is northeast of Shahroud city and is located in eastern Alborz. The lithologic composition of the volcanic rocks in the area consists of andesite, basalt, trachyandesite and quartztrachite. Plagioclase, olivine, and augite phenocrysts as the main minerals and apatite and magnetite, sericite, chlorite and apacite minerals are sub-mine...

Zarin-Kamar region is located north east of Shahrood (36o37’-36o42’N, 55007’-55012’E). Plutonic rocks in this area belongs to syenite group and their texture is intergranular hypidiomorphic. Volcanic rocks in the area have porphyritic, amygdale intersertal texture. which quartz is also seen among their cavities and porosities. Total concentration o...

Geological parameters and engineering geology play a key role in the design and construction of dams. In this regard, the role of natural factors is never more important than the geological factors and engineering geology. However, this does not mean that only the characteristics of the formation should be obtained. Rather, the available materials...

Qeshm Island is one of the most beautiful Islands in Iran which has gathered a worldly unique and precious collection due to its eroded phenomena (i.e. Chahkooh canyon, Stars Valley and Tang-e Ali Strait); valuable geological heritage (i.e. Namakdan Salt Dome the world's largest salt cave and etc.) and cultural and historical diversities. This Isla...

Geological and engineering geological parameters will play a very important role in the design and implementation of dams. The role of natural factors is no more important than geological and engineering geology. And the available materials are very important compared to other materials. There are many examples that the lack of careful consideratio...

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...

Relying on the magnetic fabrics study, Anisotropy of Magnetic Susceptibility (AMS) enjoys a special status in determining the mechanism and model of emplacement of intrusive rocks. Parameters resulted from AMS study is based on behaviors of magnetic minerals. The most important function of magnetic anisotropy measurement is to analyze rocks' petrof...

In the most advanced countries, geotourism has a top place in GNP and plays an important role in national development of these countries. The vast country of Iran has a lot of geotourism attractions with diverse geology and a wide variety in geomorphological effects that is known as the earth paradise in a lot of national and international societie...

Geotourism and geomorphotourism are considered the most important sub-categories of tourism industry in recent years, and their systematic development based on the principles of proper planning and creating required infrastructure ­ can have a direct impact on sustainable development of every country. With regard to the climate and tectonic conditi...

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 long...

Granitoid pluton in the north of Golpayegan is located in 10 km north of Golpayegan at Sanandaj-Sirjan 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 feld-spar + quartz + plagioclase + biotite + secondary minerals (op...

Disregarding water as a key sustainable development has led to the water crisis in Iran. This problem is the biggest factor for marginalizing the planning and long-term management of water. The sustainable development policies in water resources management of IRAN require consideration of the different aspects of management that each of them demand...

The studied area is located in the 10-12 Km of the N-NE of Semnan in the end of central Alborz structural zone. Sedimentary, Igneous and metamorphic rocks are the main rocks us this area. Igneous outcrops include granitoids. Nokeh granitoides contain mainly granodiorite and alkali feldspar granite. Quartz, plagioclase and k-feldspar are essential r...

The studied area is located in the 10-12 Km of the N-NE of Semnan in the end of central Alborz structural zone. Sedimentary, Igneous and metamorphic rocks are the main rocks us this area. Igneous outcrops include granitoids. Nokeh granitoides contain mainly granodiorite and alkali feldspar granite. Quartz, plagioclase and k-feldspar are essential r...

Abstract Given special tectonic and climatic conditions, Iran has the most diverse land-forms and beautiful geological phenomena, which could be attract many scientific, adventurous tourists and geological researchers. The present study aims at studying and introducing wonderful geomorphological attractions and numerous geotourism potentials of ver...

In order to assess the biological potential of ostracods in response to environmental processes, in this study, the Upper Cretaceous sediments of Bondare Bido Section, has been studied. The study Section is located at 45 km away in SouthWest direction of the Kerman (Iran). The area between northern latitude 57˚17' 48" and " western longitude 29˚49'...

Nowadays, geotourism is one of the fields of specialization of tourism, which identifies attractive geological phenomena and their tourism merit. Given its climatic and geological conditions, Iran has multiple geosites of novel geological phenomena such as the biggest salt cave of the world, the largest Kaluts of the world, beautiful mud volcanos a...

Geotourism is one of the specialized branches of tourism, which has been recently widely considered, and identifies attractive geological phenomena and their tourism merit. Iran is a country with a beautiful nature, diverse climate, and regions full of exclusive geological phenomena, study of which is necessary to identify them. Beautiful Qeshm Isl...

Geotourism is one of the new branches of tourism industry which recently has been highly regarded, and studies the introduction and utilization of the surface geological features in the line with tourism development. In this regard, Iran is a country which has been very apt and has countless attractions and amazing geological diversity and it can a...