TN992 : Exploration and reserve estimation of the Namakzar copper deposit (south Toroud), using geology and surface and borehole drilling data
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2020
Authors:
kimia kamali [Author], Susan Ebrahimi[Supervisor], Ali Reza Arab-Amiri[Supervisor]
Abstarct: The namakzar area located in the south of toroud is a part of toroud-chah shirin and sabzevar mextallogenic zone which includes different mines and deposits such as copper, lead – zinc, copper-gold, and chromite. Since the area is located in the alluvial and kavir region, Remote Sensing method is not useful for this. On the basis of 1:5000 scale geological map, the mineralization occurs in two mineralization zones in central (zone A) and southeast (zone B) areas with shale and Eocene tufaceous sandstone as host rocks suffering carbonate-zeolite alteration. According to the importance of mineralization of the A zone, further supplementary study is a top priority and 24 trenches have been designed and excavated to determine the longitudinal and transverse expansion of the mineralization zone. On the basis of the A zone studies copper oxide-sulfide mineralization are the formed as vein, veinlets and filling space in the pore minerals and rocks in the shale host rock. XRD and ICP - OES chemical analysis and microscopic studies have been taken on thin and polished sections in order to determine the grade and the type of ore mineralization. The results have shown that there is a substantial grade of copper with silver in the region in the form of minerals such as malachite, azorite and chalcocite and native copper formed of pore in the minerals and rock. Because of the impossibility of geochemical and geophysical studies, geological studies and desert observations were contributed to determine the drilling points. According to the geological survey and excavated trenches and the length, thickness and depth of them, the hypothetical 3D model of the mineral vein was constructed. Although baxsed on these studies 8 boreholes (90 degrees and 60 degree angles) were designed in the area, 6 vertical boreholes have been drilled with respect to time constraints. More than 170 meters of excavation took place in the core method in the region, and the results have been investigated to estimate the reserve. The results obtained from the topographic map and the core drilling in the reserve calculation were used in the method of vertical sections, geometrical calculations, and polygone and etc. According to these studies, the total reserve achieved is approximately 400 thousand tons. Deterministic reserve of the area, according to current studies, is approximately 150 thousand tons of copper with average grade of 0.44% copper, and its possible reserve is approximately 250 thousand tons.
Keywords:
#Copper #Manto type deposit #Toroud #DATAMINE Keeping place: Central Library of Shahrood University
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