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Open Access Article
1 - Salt Domes of Bastak, Hormozgan Province and its influence on the soil and water Resources
Mohammad Ebrahim Afifi Parviz KardavaniBastak Region is located in the northwest of Hormazgan Province. It is consideredas one of the poor regions of the country according to it's water resources while 7.24billion cubic meters of water run down to the sea in the form of waste water and floodsin Hormozgan eac MoreBastak Region is located in the northwest of Hormazgan Province. It is consideredas one of the poor regions of the country according to it's water resources while 7.24billion cubic meters of water run down to the sea in the form of waste water and floodsin Hormozgan each year without any further accessibility to it.Saline, alkaline and heavy ground water or the surface water flowing through thesaline formations are used for the irrigation of most agricultural territories of thisregion. However , the high level of ground water and severity of evaporation have stillreduced the soil fertility.On the other hand , the importance of water in this region increases with regard tothe dispersion of saline geological formations and improper quality of ground water.People suffer from the shortage of fresh and agricultural water most of the year. Thisregion is under the influence of two geological factors ie. The general folds of Zagrosmountaion chains and the phenomenon of diapirism.In addition to the saline and alkaline states of the soil, erosion has also largelyinfluenced on the decrease of its fertility. Therefore , this research mostly seeks for theeffective geomorphic evidence of the soil and water resources of the region while wehope to detect and offer some guidelines for it.Finally, salt domes are introdusing as one of the main factors of the salincty ofwater and soil in this region, We have used field activities and library and documentalmethods for achieving this purpose. Controling salinity plans should be implementedto prevent any further damage to the soil and water resources although manydifficulties are encountered when enforcing them due to several reasons. Thus, wehave tried to offer some reasonable suggestions base on two mechanical and biologicalstracthers for the reservation of soil and water resources according to regionalconditions. Manuscript profile -
Open Access Article
2 - Identification of salt domes in Ravar region, Kerman province by using the radar Polarimetry technique of Palsar images and analyzing Sentinel-2 and Aster multispectral images
Ali Mehrabi Sadegh Karimi Fatemeh NaghdiBackground and ObjectiveIn addition to tourist attractions, salt domes are one of the most interesting geomorphic phenomena having different mineral resources and can in some cases act as an oil reservoir and oil trap. It is very important to identify them. Iran i MoreBackground and ObjectiveIn addition to tourist attractions, salt domes are one of the most interesting geomorphic phenomena having different mineral resources and can in some cases act as an oil reservoir and oil trap. It is very important to identify them. Iran is very rich in evaporative deposits and also shows a unique abundance of emerged/outcropped salt domes. Most of the known salt domes are distributed in the south of Zagros and the Persian Gulf region. But they have also been reported in the other parts of Iran, including the Great Desert, Garmsar, Qom and the Ravar region. So far, no special study has been done on the salt domes of the Ravar region, so that only a few domes in the northern and eastern parts of Ravar have been mentioned. without specifying their location on the map. Therefore, the necessity for further study of this area is specified. The main purpose of this study is to identify the salt domes found/outcropped in the area of Ravar city, Kerman province, by using new remote sensing methods and using radar and multispectral images. Materials and Methods There are several ways to process multi-dimensional images that the analysis of the principle components and the false color combination are the most important ones. We will explain how these methods have been used in the present study. Aster thermal sensor bands were used to produce the false color combination, so that the mentioned minerals were exposed/highlighted by placing the 12, 11 and 13 bands in the red, green and blue channels respectively, Studies on the use of the main components analysis technique for Sentinel 2 satellite images to detect soil and rock salinity show that the false color combinations of PC7, PC6 and PC2, in red, green and green channels respectively is very suitable for this purpose. This is done in the same way in this study. Results and Discussion By performing atmospheric corrections on the multi-spectral images of Sentinel 2, the analysis of the main components was performed on it, as a result of which, the corresponding image was divided into 12 components. Using the three main components 2, 6 and 7, a false color combination was prepared. The results show that the different stone units are highlighted with different colors. Meanwhile, according to previous studies and by examining different colors and comparing and matching it with the geological map of the study area, it was specified that the light pink color indicates the salt units in the study area, This has been proven by field studies. It is noteworthy that in addition to determining the salt domes, the pink areas also show the secondary salts caused by weathering and erosion of these domes. Since the composition of the salt domes displayed in the Ravar salt basin varies so that some of these domes are dominated by salt minerals and polyalite, and others by sulfate minerals such as gypsum and Carbonate minerals such as anhydrite form the dominant mineral, different satellite images can be used to highlight the dominant minerals of each group in terms of their characteristics and spectral behavior. Thus Aster images were also used. Therefore, according to the specific spectral behavior of anhydrite and gypsum minerals in the thermal spectrum range, special color combinations can be combined to recognize salt domes by placing bands 12, 11 and 13 in the red, green and blue channels, respectively. As shown in this result, the salt domes having the dominant gypsum and anhydrite mineral are marked by light white. By performing the radar polarimetry technique and applying the CPR index, the relevant images were prepared. As mentioned earlier, CPR image suffering is closely related to the type and spectral behavior of different levels, In order to better analyze the images, the data suffering were normalized between 0 and 1. The closer these numbers are to the number one, the greater the roughness is due to surface erosion. As a result, the areas that are red in the image are usually very eroded. Conclusion The results of this study show that evaporative minerals and salt domes can be identified by using radar polarimetry method. In this study, with the application of CPR index, salt domes with red color were highlighted. In addition, due to the specific spectral behavior of the anhydrite and gypsum minerals in the thermal spectrum range, with the color combination of bands 12, 11 and 13, ASTER images of light-colored salt domes were identified. Also, the existing salt units in the study area were identified by using the three main components 2, 6 and 7 prepared from Sentinel 2 images,. Based on the obtained results, 27 salt domes were identified in the study area, which are in good agreement with the usual structural mechanism of salt domes creation. In addition, the accuracy of the results were confirmed by field survey. Manuscript profile -
Open Access Article
3 - Inverse modeling of gravity field data due to finite vertical cylinder using modular neural network and least-squares standard deviation method
Ata Eshaghzadeh Sanaz Seyedi Sahebari Roghayeh Alsadat Kalantari -
Open Access Article
4 - Geochemistry and potential of toxic elements in sediments originating from salt domes, north of Hormuz strait (Pol, Gachin, Angouran and Hormuz)
Tooba Jalali Nezhad Hamid Reza Masoumi Mohammadsadegh Dehghanian Jamal Tarrah -
Open Access Article
5 - Role of Diapirism on Stratigraphy Evolution of Mangrak Salt Dome Basin (South West Firozabad)
anahita keynezhad Ghis Badkhashan Moomtaz Moslem Ghavam Abadi Zahra RezaeeThe studied area is located in South West of Firozabad city in Fars province, south west of Iran, and structurally situated in Zagros zone. Tectonically, the area is active and has numerous salt domes. Existence of thick layers of salt in Hormuz complex and MoreThe studied area is located in South West of Firozabad city in Fars province, south west of Iran, and structurally situated in Zagros zone. Tectonically, the area is active and has numerous salt domes. Existence of thick layers of salt in Hormuz complex and consequently appearance of salt domes in this area, effected on the ancient deposition and sedimentary basin. Salt rising on one side and subsidence of sedimentary basin on another side, caused of drastic changes in sedimentary basin near the salt dome. Range of changes is related to the depth of sedimentary basin and tectonic movements, during Permian period to present. During of sea regression and transgression periods in the wide Zagros basin, these changes effected significantly in salt dome rising areas. To achieve this goal, Mangarak salt dome in the southwest of Firozabad was chosen and researched data. The result of these studies indicate that salt dome has been rising at late Cretaceous - Paleocene and found great changes in thickness of sediments which around it.Absolutely, this salt dome existed before deformation of Zagros basin and probably it has been exposed such as island in late paleogene and Neogene (such as the Persian Gulf Island’s salt domes). Manuscript profile -
Open Access Article
6 - Investigation of Active Geodynamics Caused by Performance of Salt Dome Using Radar Interferometry (Case Study: The Salt Dome of Qeshm Island)
Leilaa hajiesmaeli kourosh RashidiQeshm salt dome is a part of Qeshm unique Geopark, the only Geopark in the Middle East. The present study is a descriptive-analytical. Qeshm Salt Dome study area and required information for this research are radar satellite images, optical satellite images as well as r MoreQeshm salt dome is a part of Qeshm unique Geopark, the only Geopark in the Middle East. The present study is a descriptive-analytical. Qeshm Salt Dome study area and required information for this research are radar satellite images, optical satellite images as well as rock, geological information of the area using radar interferometry and paired radar images taken from the site. The European Space Agency is first developing some ground-level models for the region by doing some processing. After constructing the elevation model, the Envi software performs several measurements on the ASAR satellite Envisat satellite radar data and performs interpolation to calculate the elevation of Qeshm Island and presents the results digitally. An adaptive filter was used to provide better results. Rate of salt dome changes in the period 2003-2005, 0 to 0.16 m, in the period 2005-2008, -0.03 to 0.085 m and in the period 2008 to 2010, -0.007 to 0.082 m was calculated. Rate of changes in Qeshm Island in the period 2005-2003, 0 to 0.23 m, in the period 2008-2005, -0.2 to 0.15 m and in the period 2010-2008, were -0.03 to 0.23 centimeter Manuscript profile -
Open Access Article
7 - Leveling the nature attractions of Hormoz Island using Peralong model
Emad Esteki Amir Gandomkar Alireza AbbasiA very important part of tourism activities in the world is based on enjoying nature, and areas that have more valuable natural resources are given more attention in this field. In this research, using Peralong model, Hormoz Island nature tourism was prioritized. This r MoreA very important part of tourism activities in the world is based on enjoying nature, and areas that have more valuable natural resources are given more attention in this field. In this research, using Peralong model, Hormoz Island nature tourism was prioritized. This research is applied based on purpose and descriptive-analytical based on nature. The results show that by combining 5 main criteria of physical beauty, scientific criterion, historical-cultural criterion, socio-economic criterion, land form criterion, distance criterion, access criterion and coverage criterion, the final ranking was prepared in Vikor operator. In Pralong method, by combining 4 criteria of aesthetic value, scientific value, historical-cultural value and socio-economic value and 2 criteria of productivity quality value and productivity value, the total value of each landform was calculated and then prioritization was done accordingly. . In this method, the sculpture of the Statue Valley and the Rainbow Valley are of the highest value and the mangrove forest and salt cave are of medium value, and the Red Beach, Tombak Beach, Colorful Cave, Turtle Beach, White Valley, and Sandy Beach are of low value. The statue valley and the rainbow valley have gained high ranks in the two criteria of scientific value and physical beauty of the projected place compared to other criteria. Manuscript profile
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