Papers by Taher Farhadinejad
Separation of geochemical anomalies from the background by using concentration-number fractal methods in the Veshnavah Area (South of Qom)
Iranian Journal of Geology, Nov 1, 2020
The most important objective, in geochemical studies, is to detect anomalies from the background ... more The most important objective, in geochemical studies, is to detect anomalies from the background and geochemical exploration of the stream sediments is the most common method used at the preliminary stages. By studying geochemical data, geochemical communities and potential areas can be identified. Fractal methods are widely used in geological and geochemical studies for some reasons such as the spatial distribution of data, the geometric shape of anomalies, and the use of all data without neglecting any of them. In this study, the concentration-number fractal method was used for regional exploration studies, and anomalies of copper, lead and zinc elements were investigated. To do this, 800 samples of stream sediments were selected from kahak and Aran geological maps, 1: 100,000 sheet. and the anomalies of these elements were mapped. The results show that severe copper anomalies are expanded in the northern, central, southern and western parts of the area, the most severe lead anomalies are located in the western part of the region. Gained Severe anomalies of the zinc element are located in the central, southern and western parts of the region. These anomalies coincide with the lithological units of andesitic- basalt lava, volcanic breccia, tuffs, dacites, micro quartz -diorite, and micro quartz-monzonite. The comparison of the anomalies map and faults indicates that the anomalies have been more concentrated in fault zones and fault intersection points in the area and have a major role in mineralization. Keywords: Faults, Fractal method, Concentration-Number, Geochemical, Mineralization.
Revista Geoaraguaia, Jun 25, 2021
Molla Taleb pegmatites (northeast of Aligudarz) are located in the western part of the metamorphi... more Molla Taleb pegmatites (northeast of Aligudarz) are located in the western part of the metamorphicigneous Sanandaj-Sirjan Zone (SSZ). Slates and schists along with siliceous veins and veinlet and black Hornfels, as well as metamorphic sandstones are among the oldest deposits of this area. The most important geological event in this area is the development and intrusion of granitoid masses into schists of the Molla Taleb area during the Middle Jurassic. The rocks of the study area are in the range of gabbro, diorite, granodiorite, and granite. Granites are in the range of type-I granites. Most specimens are calc-alkaline and mainly contain peraluminous. Microprobe electron analysis of tourmalines present in pegmatites, tourmaline-aplite-pegmatite veins, nodular tourmalines, and quartz-tourmaline veins shows that all tourmalines are in the Schorl region and the range of alkaline tourmalines. These tourmalines with FeO / FeO + MgO ratios between 0.6 and 0.8 are in the range of magmatic-hydrothermal tourmalines and more than 0.8 in the magmatic range. Therefore, the studied tourmalines are dependent on granite environments and are formed by a hydrothermal fluid of magmatic origin.
Iranian Journal of Earth Sciences, 2021
The purpose of the present research is delineating geochemical anomaly of REEs in granitoids in s... more The purpose of the present research is delineating geochemical anomaly of REEs in granitoids in south of Varcheh 1:100,000 sheet by the use of C-N fractal model and classical statistical methods. We gathered and studied 59 rock samples for REEs by ICP-MS method in the laboratory of Iran Mineral Processing Research Center (IMPRC). The Concentration–Number (C-N) fractal model was used to delineate elemental thresholds. According to the results, the distribution of elemental concentration for Pr and Sm were divided to three classifications and Ce, La, Nd and Y had five geochemical populations in the area. The classical statistics methods were able to separate three geochemical populations. The results obtained by this study showed that the separation of geochemical anomalies for REEs using C-N fractal model and classical statistics methods yielded to the same results. Meanwhile, the high ratio of LREE to HREE in rock samples as well as high P content, assigns monazite, apatite, and sph...
Remote Sensing Data Assessment to Identify the Landslide Zones (Case Study: Southeast of Khorramabad)
The study area is located in southeast Khorramabad in Lorestan province and based on classificati... more The study area is located in southeast Khorramabad in Lorestan province and based on classification of tectonic and old watersheds in Iran, is in folded Zagros range. According to the type of geological formations, seismic, climatic and topographic conditions, this area is considered unstable slip. Landslide is considered one of the most dangerous types of natural disasters. This phenomenon is causing great damage in many countries all years that need to contemplate measures to reduce these losses. This study is carried out to evaluate the remote sensing data for landslide cognition and mapping them. The confusion matrix has been used for data accuracy assessment of TM, ETM+, IRS, ASTER images. The separation of landslide zones done with using the detection techniques, visually making the different color compositions and finally these results used for comparison with real situations. Calculate the confusion matrix for maps show that by increasing the spatial resolution images, diagnostic accuracy of occurred landslides increase.
Arabian Journal of Geosciences, 2014
The Alut 1:100,000 sheet is located in the Sanandaj-Sirjan structural zone, NW Iran, which contai... more The Alut 1:100,000 sheet is located in the Sanandaj-Sirjan structural zone, NW Iran, which contains Au-Ag (Cu) mineralization. The aim of this research is to separate geochemical anomalies using concentration-number (C-N) multifractal modeling based on stream sediments and lithogeochemical data. Results obtained from the C-N method indicated the main anomalies of Au, Ag, Cu, and As accumulated in the central and eastern parts of the area which are associated with meta-volcanic and granitic rocks. Correlation between the elemental highly intensive anomalies and geological particulars consisting of alteration zones and faults revealed that the main Au anomalies are in the central and eastern parts of the Alut 1:100,000 sheet.
Arabian Journal of Geosciences, 2012
One of the important indicators to show the quality of water for drinking and irrigation is nitra... more One of the important indicators to show the quality of water for drinking and irrigation is nitrate values in water and soil. Nitrate enters surface water and groundwater through degradation and decomposition of human and animal wastes, industrial productions, and agricultural runoff. The present paper focuses on the concentration of nitrite (NO 2 -1 ) and nitrate (NO 3 -1 ) of the groundwater in Taft region, Central Iran. Sixty-one samples of the region's aqueducts, wells, and springs were collected in September 2008 and May 2009 and analyzed by ICP-MS method. However, distribution maps of nitrate and nitrite and their frequency diagram in the pertinent samples have been generated. Then, they were compared to the US Environmental Protection Agency (EPA) and WHO international standards. The mean of nitrate content measured in the samples was 18.52 mg/l, maximum was 115 mg/l which is higher than the EPA standard (i.e., 10 mg/l), and the mean of nitrite content was about 0.06 mg/l. According to the distribution maps, concentration of these anions is high in the downstream of settlements and farmlands of Taft region. With respect to the penetration of agricultural wastes, flooding irrigation, thin layer of alluvium, sandy texture, and the amount of fertilizer consumed in the region, and also absence of any natural source for these anions and absence of the major industrial activities in the region to produce sewage, it seems that nitrate and nitrite originated from the agricultural sewage and human waste. As the content of nitrate in drinking water in the region is higher than WHO and EPA standards, so there is the risk of methemoglobinemia disease in infants. In addition, nitrate content within the stomach and lungs interacts with amine and nitrosamines are made up which are potentially the initial cause of all cancers in human.
Study of mineralization in gholgholeh area based on SEM and fluid inclusion (southwest of saghez city—Iran)
The aim of this study is gold and its element mineralization in Gholgholeh area. The Gholgholeh a... more The aim of this study is gold and its element mineralization in Gholgholeh area. The Gholgholeh area is located in 40 Km southwest of Saghez city and in northwest of Kordestan province. The case of study in the oldest rock-unit outcrops in the north of this area which belongs to Percambrian gneiss. Permian deposit mostly distributed in north, northeast and northwest of this area. The major types of alteration are composed of silicification, sulfidation, sericitization, chloritization and carbonatization. sercitization and choritization are the most. SEM and mineralography studies indicate occurrence of sulfide mieralization especially Au sulfides which appears in two generations. On the basis of SEM studies, little Ag and As are observed. There is no gold in calcite. Primary mineral consist of: pyrite, marcazite and calchopyrite, and secondary minerals are pyrite, coveline and realgar. On the other hand, fluid inclusion studies shows 350oC temperature in gold formation. Evidence lik...
Fractal methods are regarded as a highly efficient method for more accurate separation of boundar... more Fractal methods are regarded as a highly efficient method for more accurate separation of boundaries between mineralized zone in shallow and deep studies. In this research, concentration-number (C-N) and concentration-area (C-A) fractal methods were used in order to identify promising areas of the elements like Cr, Co and Ni in the Khoy 1:100,000 geological mapping sheet, NW Iran. The factor analysis was performed on the elements, and factors, which were related to the elements, were isolated and studied by both fractal methods. The current geological locations of the extreme anomalies were investigated and the results showed a very close relationship and overlapping. The results of the presented models show that the most elements under study are located in the central and southwestern parts of the sheet. From the point of view of the lithology, these areas correspond to the serpentinite ultramafic units of harzburgite and dunite, and as a result, there is a high probability of Cr m...
Fractal analysis and structural mapping for copper exploration in Veshnavah area, central part of Urumieh-Dokhtar Magmatic Arc (UDMA), Iran
Geological structures play an important role in deposition of ore mineralization during hydrother... more Geological structures play an important role in deposition of ore mineralization during hydrothermal activities. In this study, the relationship between fault systems and location of copper mineralization was investigated using fractal analysis in the Veshnavah area, Urumieh-Dokhtar Magmatic Arc (UDMA), Iran. A copper anomaly map was generated by implementing fractal analysis of concentration-area (C-A) and concentration-number (C-N). Geochemical anomalies were mostly found in the northern, central, and southern parts of the study region that categorized to high and very high anomaly zones for copper mineralization. Well correlation of high- and medium-grade Cu anomalies with fracture density indicates a genetic relationship between Cu mineralization and fault and fracture systems particularly for NW-SE orientation. Besides, the andesitic-basalt lava lithologies, volcanic breccia, mega porphyritic andesite-basalt lava, micro-quartz diorite, and micro-quartz monzonite show a relevant...
Separation of au, Ag, As, Cd, Cu, Hg, Mo and Sb geochemical anomalies using the concentration-number (C-N) fractal and classical statistical models in Nahavand 1: 100,000 sheet, Iran
Arabian Journal of Geosciences
Study of mineralization in gholgholeh area based on SEM and fluid inclusion (southwest of saghez city—Iran)
Dere Sedi̇mani Veri̇leri̇ne “Fraktal Model” Ve “Faktör Anali̇zi̇” Uygulanarak CR Mi̇nerali̇zasyonunun Tanimlanmasi: Khoy 1:100.000 Paftasi, KB İran
Maden Tetkik ve Arama Dergisi, 2016
Dere Sedi̇mani Veri̇leri̇ne “Fraktal Model” Ve “Faktör Anali̇zi̇” Uygulanarak CR Mi̇nerali̇zasyonunun Tanimlanmasi: Khoy 1:100.000 Paftasi, KB İran
Maden Tetkik ve Arama Dergisi, 2016
Fractal methods are regarded as a highly efficient method for more accurate separation of boundar... more Fractal methods are regarded as a highly efficient method for more accurate separation of boundaries between mineralized zone in shallow and deep studies. In this research, concentration-number (C-N) and concentration-area (C-A) fractal methods were used in order to identify promising areas of the elements like Cr, Co and Ni in the Khoy 1:100.000 geological mapping sheet, NW Iran. The factor analysis was performed on the elements, and factors, which were related to the elements, were isolated and studied by both fractal methods. The current geological locations of the extreme anomalies were investigated and the results showed a very close relationship and overlapping. The results of the presented models show that the most elements under study are located in the central and southwestern parts of the sheet. From the point of view of the lithology, these areas correspond to the serpentinite ultramafic units of harzburgite and dunite, and as a result, there is a high probability of Cr mineralization. The achieved results are confirmed by factor analysis. This means that a factor accumulation of these elements is exactly the same as those of each element.
Arsenic is a toxic element and The magnitude of the problem of arsenic poisoning was so great tha... more Arsenic is a toxic element and The magnitude of the problem of arsenic poisoning was so great that WHO having recognized the enormous health implications lowered the provisional guideline value for arsenic in drinking water from 50 µg/L to 10 µg/L. Thirty five million people are believed to be exposed to an arsenic concentration in drinking water exceeding 50 µg/L and 57 million people exposed to a concentration exceeding 10 µg/L. The element arsenic is a pollutant known to exist in four major oxidation states +5, +3, 0 and -3. Arsenic mobilization in the environment occurs mostly under geogenic conditions though anthropogenic influences also affect the arsenic cycle to a significant degree. From among these, mining activity, combustion of fossil fuels, use of arsenic in agrochemicals is of particular importance.
The purpose of this paper is to investigate the concentration, distribution and origin of arsenic in ground waters in the Taft area ( 15 km South West of Yazd). Thus, 61 samples of water from canals, wells and springs in the area harvested in October 1387 and May 88. then They were analyzed using ICP-MS . Using the results of their analysis, maps of the arsenic iso- concentration and Frequency diagrams was plotted then they were compared with EPA and WHO standards. The results show that arsenic levels in the samples with average mg / l 5.72 and the maximum mg / l 18.37 is higher than the standard EPA (0 mg / l) and WHO (10 mg / l). Correlation chart of the elements arsenic, which shows a positive correlation with PH, iron and manganese, and aluminum is a weak inverse correlation. Correlation diagram of arsenic with different elements shows that arsenic have a positive correlation with PH, iron and manganese, and a weak inverse correlation with aluminum . The people consuming contaminated water with arsenic are at risk, such as nervous system disorders, skin cancer, lung and bladder and venous disease. therefore, contaminated water sources need to be removed from the intake system.
The study area is located in southeast Khorramabad in Lorestan province and based on
classificati... more The study area is located in southeast Khorramabad in Lorestan province and based on
classification of tectonic and old watersheds in Iran, is in folded Zagros range.
According to the type of geological formations, seismic, climatic and topographic
conditions, this area is considered unstable slip. Landslide is considered one of the most
dangerous types of natural disasters. This phenomenon is causing great damage in many
countries all years that need to contemplate measures to reduce these losses. This study
is carried out to evaluate the remote sensing data for landslide cognition and mapping
them. The confusion matrix has been used for data accuracy assessment of TM, ETM+,
IRS, ASTER images. The separation of landslide zones done with using the detection
techniques, visually making the different color compositions and finally these results
used for comparison with real situations. Calculate the confusion matrix for maps show
that by increasing the spatial resolution images, diagnostic accuracy of occurred
landslides increase.
One of the important indicators to show the quality
of water for drinking and irrigation is nitra... more One of the important indicators to show the quality
of water for drinking and irrigation is nitrate values in
water and soil. Nitrate enters surface water and groundwater
through degradation and decomposition of human and animal
wastes, industrial productions, and agricultural runoff.
The present paper focuses on the concentration of nitrite
(NO2
−1) and nitrate (NO3
−1) of the groundwater in Taft
region, Central Iran. Sixty-one samples of the region’s aqueducts,
wells, and springs were collected in September 2008
and May 2009 and analyzed by ICP-MS method. However,
distribution maps of nitrate and nitrite and their frequency
diagram in the pertinent samples have been generated. Then,
they were compared to the US Environmental Protection
Agency (EPA) and WHO international standards. The mean
of nitrate content measured in the samples was 18.52 mg/l,
maximum was 115 mg/l which is higher than the EPA
standard (i.e., 10 mg/l), and the mean of nitrite content
was about 0.06 mg/l. According to the distribution maps,
concentration of these anions is high in the downstream of
settlements and farmlands of Taft region. With respect to the
penetration of agricultural wastes, flooding irrigation, thin
layer of alluvium, sandy texture, and the amount of fertilizer
consumed in the region, and also absence of any natural
source for these anions and absence of the major industrial
activities in the region to produce sewage, it seems that
nitrate and nitrite originated from the agricultural sewage
and human waste. As the content of nitrate in drinking water
in the region is higher than WHO and EPA standards, so
there is the risk of methemoglobinemia disease in infants. In
addition, nitrate content within the stomach and lungs interacts
with amine and nitrosamines are made up which are
potentially the initial cause of all cancers in human.
The Alut 1:100,000 sheet is located in the Sanandaj-Sirjan structural zone, NW Iran, which contai... more The Alut 1:100,000 sheet is located in the Sanandaj-Sirjan structural zone, NW Iran, which contains Au-Ag (Cu) mineralization. The aim of this research is to separate geochemical anomalies using concentration-number (C-N) multifractal modeling based on stream sediments and lithogeochemical data. Results obtained from the C-N method indicated the main anomalies of Au, Ag, Cu, and As accumulated in the central and eastern parts of the area which are associated with meta-volcanic and granitic rocks. Correlation between the elemental highly intensive anomalies and geological particulars consisting of alteration zones and faults revealed that the main Au anomalies are in the central and eastern parts of the Alut 1:100,000 sheet.
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Papers by Taher Farhadinejad
The purpose of this paper is to investigate the concentration, distribution and origin of arsenic in ground waters in the Taft area ( 15 km South West of Yazd). Thus, 61 samples of water from canals, wells and springs in the area harvested in October 1387 and May 88. then They were analyzed using ICP-MS . Using the results of their analysis, maps of the arsenic iso- concentration and Frequency diagrams was plotted then they were compared with EPA and WHO standards. The results show that arsenic levels in the samples with average mg / l 5.72 and the maximum mg / l 18.37 is higher than the standard EPA (0 mg / l) and WHO (10 mg / l). Correlation chart of the elements arsenic, which shows a positive correlation with PH, iron and manganese, and aluminum is a weak inverse correlation. Correlation diagram of arsenic with different elements shows that arsenic have a positive correlation with PH, iron and manganese, and a weak inverse correlation with aluminum . The people consuming contaminated water with arsenic are at risk, such as nervous system disorders, skin cancer, lung and bladder and venous disease. therefore, contaminated water sources need to be removed from the intake system.
classification of tectonic and old watersheds in Iran, is in folded Zagros range.
According to the type of geological formations, seismic, climatic and topographic
conditions, this area is considered unstable slip. Landslide is considered one of the most
dangerous types of natural disasters. This phenomenon is causing great damage in many
countries all years that need to contemplate measures to reduce these losses. This study
is carried out to evaluate the remote sensing data for landslide cognition and mapping
them. The confusion matrix has been used for data accuracy assessment of TM, ETM+,
IRS, ASTER images. The separation of landslide zones done with using the detection
techniques, visually making the different color compositions and finally these results
used for comparison with real situations. Calculate the confusion matrix for maps show
that by increasing the spatial resolution images, diagnostic accuracy of occurred
landslides increase.
of water for drinking and irrigation is nitrate values in
water and soil. Nitrate enters surface water and groundwater
through degradation and decomposition of human and animal
wastes, industrial productions, and agricultural runoff.
The present paper focuses on the concentration of nitrite
(NO2
−1) and nitrate (NO3
−1) of the groundwater in Taft
region, Central Iran. Sixty-one samples of the region’s aqueducts,
wells, and springs were collected in September 2008
and May 2009 and analyzed by ICP-MS method. However,
distribution maps of nitrate and nitrite and their frequency
diagram in the pertinent samples have been generated. Then,
they were compared to the US Environmental Protection
Agency (EPA) and WHO international standards. The mean
of nitrate content measured in the samples was 18.52 mg/l,
maximum was 115 mg/l which is higher than the EPA
standard (i.e., 10 mg/l), and the mean of nitrite content
was about 0.06 mg/l. According to the distribution maps,
concentration of these anions is high in the downstream of
settlements and farmlands of Taft region. With respect to the
penetration of agricultural wastes, flooding irrigation, thin
layer of alluvium, sandy texture, and the amount of fertilizer
consumed in the region, and also absence of any natural
source for these anions and absence of the major industrial
activities in the region to produce sewage, it seems that
nitrate and nitrite originated from the agricultural sewage
and human waste. As the content of nitrate in drinking water
in the region is higher than WHO and EPA standards, so
there is the risk of methemoglobinemia disease in infants. In
addition, nitrate content within the stomach and lungs interacts
with amine and nitrosamines are made up which are
potentially the initial cause of all cancers in human.
The purpose of this paper is to investigate the concentration, distribution and origin of arsenic in ground waters in the Taft area ( 15 km South West of Yazd). Thus, 61 samples of water from canals, wells and springs in the area harvested in October 1387 and May 88. then They were analyzed using ICP-MS . Using the results of their analysis, maps of the arsenic iso- concentration and Frequency diagrams was plotted then they were compared with EPA and WHO standards. The results show that arsenic levels in the samples with average mg / l 5.72 and the maximum mg / l 18.37 is higher than the standard EPA (0 mg / l) and WHO (10 mg / l). Correlation chart of the elements arsenic, which shows a positive correlation with PH, iron and manganese, and aluminum is a weak inverse correlation. Correlation diagram of arsenic with different elements shows that arsenic have a positive correlation with PH, iron and manganese, and a weak inverse correlation with aluminum . The people consuming contaminated water with arsenic are at risk, such as nervous system disorders, skin cancer, lung and bladder and venous disease. therefore, contaminated water sources need to be removed from the intake system.
classification of tectonic and old watersheds in Iran, is in folded Zagros range.
According to the type of geological formations, seismic, climatic and topographic
conditions, this area is considered unstable slip. Landslide is considered one of the most
dangerous types of natural disasters. This phenomenon is causing great damage in many
countries all years that need to contemplate measures to reduce these losses. This study
is carried out to evaluate the remote sensing data for landslide cognition and mapping
them. The confusion matrix has been used for data accuracy assessment of TM, ETM+,
IRS, ASTER images. The separation of landslide zones done with using the detection
techniques, visually making the different color compositions and finally these results
used for comparison with real situations. Calculate the confusion matrix for maps show
that by increasing the spatial resolution images, diagnostic accuracy of occurred
landslides increase.
of water for drinking and irrigation is nitrate values in
water and soil. Nitrate enters surface water and groundwater
through degradation and decomposition of human and animal
wastes, industrial productions, and agricultural runoff.
The present paper focuses on the concentration of nitrite
(NO2
−1) and nitrate (NO3
−1) of the groundwater in Taft
region, Central Iran. Sixty-one samples of the region’s aqueducts,
wells, and springs were collected in September 2008
and May 2009 and analyzed by ICP-MS method. However,
distribution maps of nitrate and nitrite and their frequency
diagram in the pertinent samples have been generated. Then,
they were compared to the US Environmental Protection
Agency (EPA) and WHO international standards. The mean
of nitrate content measured in the samples was 18.52 mg/l,
maximum was 115 mg/l which is higher than the EPA
standard (i.e., 10 mg/l), and the mean of nitrite content
was about 0.06 mg/l. According to the distribution maps,
concentration of these anions is high in the downstream of
settlements and farmlands of Taft region. With respect to the
penetration of agricultural wastes, flooding irrigation, thin
layer of alluvium, sandy texture, and the amount of fertilizer
consumed in the region, and also absence of any natural
source for these anions and absence of the major industrial
activities in the region to produce sewage, it seems that
nitrate and nitrite originated from the agricultural sewage
and human waste. As the content of nitrate in drinking water
in the region is higher than WHO and EPA standards, so
there is the risk of methemoglobinemia disease in infants. In
addition, nitrate content within the stomach and lungs interacts
with amine and nitrosamines are made up which are
potentially the initial cause of all cancers in human.