TN204 :
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2011
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Abstarct: Saghand region is in middle part of construction zone incentral Iran. Among the nine regions of the radiation anomaly, the No. 6 were selected baxsed on the exploratory in order to geological studies, radiometric ground-baxsed and litho geochemical studies. By study polished and thin sections prepared and analysis taken samples of litho geochemical, it was found that genus of more anomaly 6 stones are formed of kinds of "diorite and quartz diorite (granodiorite)" calc-alkaline magma-owned (subduction zone) and "gabbroic" tholeiitic magma-owned (zone of the ocean floor); Genus of taken samples that show high content of radioactivity is the gabbro. Radioactive mineral in this anomaly is "davidite [(Fe,U) TiO3]" that comes with albite mineral in radioactive samples, confirming this radioactive elements mineralization is associated with the albitization phenomenon.
In this study, in 1.13 km2 of anomaly 6 saghand, rectangular regional with area of 0.45 km2 were studied for the systematic radiometric with profiles east-west by distance of 50 meters and 10 meter; that among 1001 taken radiometric readings, recorded 11 readings of radiation above the 1000 cps and maximum 6000 cps, is noteworthy. Also in most of the readings recorded, amount of enriched in the two-element uranium (U) and thorium (Th) was almost identical; while amount of enriched of these two elements is several fold amount of enriched in potassium (K). The radiometric data community separated to the two communities of anomaly and background and gamma ray counts contour (cps) for U, Th, K in terms of isolated anomaly, show that the radioactive contour focus in the northwest corner and north of the study area.
Analysis Result of 47 litho geochemical samples taken of two locations on radioactive contour focus shows that among the oxides of major and minor measured elements, only data for silica and aluminum oxide have a normal distribution. Also results of litho geochemical data analysis using spearman correlation coefficient, cluster analysis and scatter plots, indicates that element uranium (U) is correlated with the following elements and oxides.
TiO2 (0.720), Ba (0.634), Nb (0.630), Y (0.595), Th (0.500), Fe2O3 (0.463)
Finally, according to the results of the study of polished thin prepared sections, impressions of radiometric ground-baxsed and analysis of taken litho geochemical samples, regional about 405 m2 was proposed for core drilling and borehole.
Keywords:
#Anomaly 6 of saghand #Radioactive materials #Radiometric #Litho geochemical.
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
Visitor: