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Application of Remote Sensing and Field Geophysics for Exploration of Cu Deposits in Bab-Zangoeie, Chahar-Gonbad Region of Kerman, Iran
Saeed Nazari, Alireza Arab Amiri, Abolghasem Kamkar Rouhani, Sadegh Karimpouli,
Volume 15, Issue 2 (9-2021)
Abstract
Chahar-Gonbad region of Kerman province is geologically located in the southern part of central Iran zone, dominantly in Uromieh-Dokhtar volcanic belt. In this region, many high potential prospects, specially Cu-Au mineralization, have been detected during large scale exploration and reconnaissance phases. In this paper, remote sensing and field geophysics were used for alteration mapping on the surface and ore body delineation on the subsurface, respectively. To this end, we used an ASTER satellite image and different maps were generated by spectral technics such as false color composites and spectral ratios. Results showed argillic (and phillic) alteration in Bab-Zangoeie area is surrounded by propylitic alteration, which could be a promising evidence for Cu mineralization. Integrating these results with previous exploration studies led to selecting target area selection for ground study and field geophysics. We used both induced polarization (IP) and resistivity (RS) methods as two powerful geoelectrical methods by a pole-dipole array along four profiles. After preprocessing analysis, forward and inverse models were constructed in 2D section and 3D overlay model of joint IP/RS anomalies were constructed. Based on the obtained results, the deposit in depth where we proposed drilling targets. Further drilling operation have proved the mineralization in our proposed targets../files/site1/files/152/%D9%86%D8%B8%D8%B1%DB%8C.pdf
 
Assessing the parameters affecting on ultrasonic wave velocity of some building stones used in Iran
Ms. Somayeh Arab-Ameri, Dr. Davood Fereidooni,
Volume 17, Issue 1 (Spring 2023 2023)
Abstract
Ultrasonic wave velocity testing is a non-destructive, economical, simple and rapid method used for determining the physical and engineering properties of rock. This test is based on the velocity of the elastic wave in rocks. The ultrasonic wave velocity of rocks depends on intrinsic and environmental properties such as mineralogical composition, density, porosity, grain size, shape, texture, anisotropy, water content, and temperature of rocks. In this research, 10 different types of building stone, including limestone and granite, were cut into 50 cubic specimens with dimensions of 10Í4Î4 cm, and then they were tested using the Pandit wave velocity testing machine to find the effective parameters on the velocity of the ultrasonic wave should be investigated in them. These parameters include dry unit weight, temperature, type of pore fluid, state of filling material and loading. Based on the obtained results, the correlation between ultrasonic wave velocity and dry unit weight is a direct linear relationship and its relationship with the type of pore fluid condition of the filling material and loading is inverse relationship. In addition, increasing the temperature increases the velocity of the ultrasonic wave. Also, in terms of the type of pore fluid, the lowest value of the wave velocity was obtained in the state saturated with water and the highest value of the wave velocity was obtained in the common salt solution with a concentration of 150%. Regarding the state of the rock pore filling material, the highest velocity value was observed in the frozen filling state and the lowest velocity value was observed in the air filling state. As the load increases, the velocity of the ultrasonic waves decreases in the studied rocks.

Effect of Siahroud river on lead and nitrate pollution of groundwater in Ghaemshahr-Joybar plain
Prof. Hamid Reza Nassery, Eng. Maryam Arab, Dr. Zahra Kayhomayoon,
Volume 18, Issue 2 (Summer 2024)
Abstract
The study of the aquifer hydrogeochemical processes and the detailed investigation of the groundwater pollutants in order to control the pollution and prevent its environmental consequences are of special importance. The aim of this research is to investigate the effect of the Siahroud River on lead and nitrate contamination of groundwater in Qaimshahr-Joibar plain. For this purpose, two surface water samples were collected from Siahroud River, before and after Qaimshahr city, and 13 groundwater samples were collected from 13 wells, located in the bed of Siahroud river, in three periods during 2019-2020. The of nitrate, lead and dissolved oxygen concentrations of the samples were measured in the laboratory of Mazandaran Regional Water Company. The assessment of the pollution of water resources in the area shows that the discharge of urban, rural and industrial sewage and agricultural drains into the Siahroud River has caused an increase in the concentration of nitrate and lead ions in the groundwater. The Siahroud River has had an impact on groundwater pollution in the Qaimshahr plain in the upstream and some middle parts of the range due to the direction of groundwater flow and the exchange that exists between the river and the aquifer, as well as the direct discharge of pollutant sources to surface water.

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