The Study of chemical quality of groundwater in Khorramabad
area, Lorestan Province
A.
Ahmadi Khalaji
author
Z.
Tahmasbi
author
T.
Dolatsha
author
text
article
2013
per
Khorramabad plain is located in folded Zagros in classification of structural geology. The investigations of hydrochemical results in this area show that groundwater is calcic bicarbonate to magnesium type and water quality is suitable for drinking and agriculture. But according to composition of geological formation (chalky-salty Gachsaran and Limeston Sarvak, Ilam, Asmari Formation) in this area, the quality of karstic resources and reserves is vulnerable. Also this studies show that most of the elements (except for Ammonia amount in some samples and Fluorine) in groundwater occurred in the world standard global range and have not problem in regard to environmental geology.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
1
15
https://nfag.basu.ac.ir/article_691_36293bced9e82aa46497ad0d33c58215.pdf
Investigations on water escape causes of Arbatan Dam in Azerbaijan-e-Sharghi
M.
Keshavarz
author
M. A.
Ebadi
author
M.
Talkhablou
author
text
article
2013
per
Investigation on the causes of the water escape from Arbatan Dam is the main objective of this paper. The dam is located 50 km of North-East Tabriz in Azerbaijan-e-Sharghi province. The maximum capacity of the dam reservoir is about 27 millions m3 and is feeding by an artificial channel with 26 km length from Talkh-e-RoudRiver. The dam is constructed in 2005 and it is dewatered four years later due to water escaping. Geothechnial and field investigations show that Gypsifeerous marls with intercalations of Gypsum crystals are the main lithology of the site. A Salt layer has also been recognized in 35m under the reservoir. It seems the water has been reached to salt layer by dissolution of gypsum layers. The salt layer dissolution has been caused the underground channels and sinkholes, consequently. Roof falling of the underground channels caused the ground subsidence and the dam axis has broken. The same tendency of sinkholes and land subsidence with layers strike in the study area confirms the obtained result.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
16
26
https://nfag.basu.ac.ir/article_436_fb918ce7c58b4aac29fae197e52ec2ca.pdf
Geochemical study of volcanic host rocks and argillic alteration mineralogy in Sarcheshmeh porphyry copper deposit: based on new data
M.
Maanijou
author
M.
Mostaghimi
author
M.
Abdollahy Riseh
author
N.
Sahraro
author
text
article
2013
per
Sarcheshmeh porphyry copper deposit lies within volcanic belt of Urumieh-Dokhtar, the most important mettalogenic belt of Iran. Based on petrography and petrology, the volcanic rocks are generally andesite and dacite. The magma has calcalkaline affinities and the amount of MgO and FeOt show a negative correlation with SiO2 which is a sign of fractional crystallization of clinopyroxene from magama. The CaO content also decreases which can be related with composition changes of plagioclase from calcic to sodic. The situation of such volcanic rocks is within magmatic arcs related to subduction of oceanic crust under continental crust. Based on XRD analysis, the major minerals of argillic alteration in sarcheshmeh deposit includes: kaolinite, montmorilonite, illite-mica, chlorite, quartz and pyrite, in which pyrite is the only sulfide in this barren zone. Finally, according to these studies, changes of clay minerals in western outcrop outward the deposit is constant, but in northern outcrop the amount of clay minerals changes from inside to margins of the deposit. By which in interior samples and adjacent to the stock, kaolinite is dominant and in margins plus exterior zones of algillic alteration, the montmorilonite dominates.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
27
41
https://nfag.basu.ac.ir/article_437_e9791376ad4e9246d66855eeb7666eeb.pdf
Fractal Geometry of Faults and Seismicity of Azerbaijan (NW Iran)
M.
Mehrpouyan
author
M.M.
Khatib
author
M
Jami
author
M.
Arjmandi
author
H.
Mirzynaly Yazdi
author
text
article
2013
per
The Azerbaijan experimented several seismic activities during its history, that sometimes these earthquakes caused significant damage to lives and property. Most seismic activity in Azerbaijan can be seen around the major fault systems that distributedin the clustering system in the NW-SE direction. Seismic behavior in a fault could be related to geometrical irregularities, regardless of the scale, this can be a function off ractal geometry and so these geometricalirregularities can be investigated in case of fractal dimension (D). Box counting method off ractal analysis was conducted in Azerbaijan. Based on our results, with receding from the main fault systemin there gion which has a NW-SE trend and distributed from the NorthWest to Centre of Azerbaijan, the fractal dimension decrease. This is reason for the existence of discontinuities in the fault systems in the region. High value of fractal dimension in Tabriz, Osku and Bostan Abad regions and also decrease in value of fractal dimension in Qare Chaman, Sarab and Mianeh suggests that the ending zone of main fault systems in Azerbaijan lying in region between Bostan Abad and Qare Chaman region. On fractal analysis of Azerbaijan faults and surviving seismic data, main seismic activities in Azerbaijan are related to major fault or their branches in region. Also distribution of volume and surface fractal dimension in Azerbaijan shows high seismic activity in central and NW regions than other adjacent regions.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
42
51
https://nfag.basu.ac.ir/article_438_d44554101b195eab9dea7198b56a9f04.pdf
The Study of Fusulinata from Permian deposits in the Northern Maku (Azarbaijan, Iran)
E.
Ebrahim Nejad
author
A. A.
siabeghodsy
author
S.
Abbasi
author
text
article
2013
per
Permian deposits in Maku area have expanded similar to other parts of Azarbaijan and consists of dark gray limestones with approximately thickness of 926 meters. Permian deposits in the study area can be divided into three parts: Bellerophon limestones, cherty limestones and massive dolomitic and crystaline limestones. Permian limestones are fossiliferous and tree orders of foraminiferas (orders Fusulinata, Miliolata and Nodosariata) are detectable that Foraminiferas of Fusulinata and Miliolata have more diversity. In this study, 14 genera and 13 species from order Fusulinata have been identified. Identified foraminiferal assemblages determine the age of Early Murgabian-Dzhulfian for deposits.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
52
65
https://nfag.basu.ac.ir/article_439_a0f90cc793b47c8029fe71c88105353c.pdf
Evaluation of element mass changes according to Grant- Gresens equations and Isocon method in Kervian shear zone gold mineralization
F.
Darabi Golestan
author
R.
Ghavami Riabi
author
B.
Saidi
author
M.R.
Hezare
author
text
article
2013
per
Based on studies, Kervian gold mineralization is known as the shear zone type. Gold mineralization in this area has been controlled by factors such as plastic shear zones and hydrothermal alteration. Dominant alterations are chloritic and sericitic, and in some places silicic and carbonatic alteration are seen. Hence, geochemical comparison of non-altered rocks with altered rocks in the region will help to evaluate the effects of alteration process on the element scattering and investigate geochemical behavior of elements. Geochemical behavior (kind and rates of mobility) can be defined as a quantitative measure to evaluation of mineralization area. Isocon method is defined based on process where the immobile variables identified, and according that element by loss and gain behavior is separated. Numerical calculations were carried out to recognize mobile or immobile elements in various rock units (Intrusive rocks, metavolcanic and shear zone) and also different ratios of these elements in altered and non-altered area showed that elements of Al, Ti, and rarely Na, Cr having immobile behavior, and their masses was relatively unchanged during alteration. As, La, Mo, Ba, Mn and Au was added and As in shear zone part showed maximum mass gain. Also Zn, Ca, Sr and Mg were depleted in all kind of rocks. Exploration ratio which show distal and proximal to mineralization area, constructed from the total abundances of added element to depleted element, and according this survey exploration index is defined.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
66
76
https://nfag.basu.ac.ir/article_440_8dbebc0e2f531084852dff5de417f35f.pdf
The Study the geochemistry of Kharket polje (North of Mashhad city)
M.
Hydarizad
author
S.A
Aghaei
author
M.
Abdollahy Mansour Khani
author
text
article
2013
per
Kharket Polje is one of the most outstanding Karstic feature in Khorasan-Razavi province which is located 55 Km to the north of Mashahd. This polje is covered by Mozduran carbonate Formation and marginally by Shoorije Formation in the north and quaternary sediments in the center. During this survey, 33 samples including 28 samples from Mozduran carbonates and 5 samples from quaternary sediments were collected and the concentration of Sr, Mg, Mn, Fe and Ca were analyzed. The distribution map of these elements in the study area and factor analysis depicted the parameters which control the geochemistry of the polje and identify the locations of high concentration of the elements. Increase in Fe and Mn concentration in the carbonate samples is due to influence of diagenetic processes in relatively anoxic to low oxygen environments, whereas increase in these elements values and decrease in Sr concentration in the study samples can be related to their partition coefficient and low concentration of these element in diagenetic fluids. The results of this survey show that Meteoric diagenesis is the most significant factor which controls the geochemistry of Kharket polje whereas the distribution map and factor analysis demonstrates that the concentration of Fe increases dramatically in the base of polje and reaches about 7500 ppm where the slope is considerably lower compare to other parts of polje. The gentle slope of Kharket polje and its lithology (mainly consists of sandstone) in southern parts makes it good geochemical trap for some minor elements such as Fe, Ni and Mn.
New Findings in
Applied Geology
Bu-Ali Sina University
2228-5873
7
v.
13
no.
2013
77
88
https://nfag.basu.ac.ir/article_441_0cee441ca75a898b5345238893731115.pdf