A. Khakzad; A. Khakzad; H. Asadi; M. H. Emami
Abstract
Kahang exploration area located in Esfahan state and 10 Km of the east of Zefreh town that is located on Uromieh-Dokhtar volcanoplotonic belt. Primary results showed that it has good potential for resources of Copper (Cu) and Molybdenum (Mo). Kahang region is an alteration and breccia zone. Generally, ...
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Kahang exploration area located in Esfahan state and 10 Km of the east of Zefreh town that is located on Uromieh-Dokhtar volcanoplotonic belt. Primary results showed that it has good potential for resources of Copper (Cu) and Molybdenum (Mo). Kahang region is an alteration and breccia zone. Generally, more than %90 of rocks of this region has been affected by hydrothermal fluids.The occurrence of altration zones and Iron Oxides were confirmed by Satellite images processing. Faults and linear features were recognized using Satellite images (ETM) processing and PCA method. 320 litho geochemical samples of the area have been collected. They were chemically analyzed For geochemical survey . For the reason of irregular distribution of the elements in haloes related to porphyric massives , the normal data are used for study of distribution pattern of indicator elements and drawing maps . Also , the degree of correlation between elements are calculated using some statistic methods such as spearman and pearson and cluster analysis .Based on factor analysis method is distinguished that principal elements of the area are affected by 4 factors. In the next stage , geochemical maps of unielement of soil and rock samples are drawed for study of pattern of zonation of elements . Based on threshold limit method , the anomalous areas and pattern of zonation of elements are distinguished. Also, for separating and identifying the important anomalies, the P.N. method was used. For investigation of geochemical behaviors of Cu and Mo, anomalous maps of 10 elements were drawn which are Cu, Mo, Au, Ag, Pb, Zn, As, Sb, Mn and Ba. Consequently, it was found that in central part of Quartzmonzonites and Diorites areas the most concentration of Cu and Mo have been occurred, whereas in the margin of the andesitic rocks areas there is the most concentration of supergeous ores such as Pb, Zn and Ag.
To get better results and also to select the proper points for drilling, the composites haloes method was used and on the base of standard normalized data, the map of composite haloes of supergene and hypogen ores were drawn. The Solovof method was used for evaluation of erosion surface in ore area. The results show that the ore is located in subsurface and has not been destroyed by erosion.
A. Akbarpour; N. Gholami; A. Saiedi
Abstract
The masjeddaghi area with 8.5 km2 extent is located in 35 km for east of jolfa.The geological exploration started in this area in 2003 and soil sample method was chosen due to the geological situation topography and weathering ,The sampling network was 100m*100m and 100m*200m ...
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The masjeddaghi area with 8.5 km2 extent is located in 35 km for east of jolfa.The geological exploration started in this area in 2003 and soil sample method was chosen due to the geological situation topography and weathering ,The sampling network was 100m*100m and 100m*200m and all samples were analyzed for 13 elements .including Au,Cr,Co,Ba,Cu,Pb,Zn,Ag, Be, Mo,Sn,Mn.The geological studies shows that the oldest rock unit outcropped is Eocene flysh widely distributed in southern and north eastern part of the area .Another outcrops are mainly volcanic ,subvolcanic complex of andesite and trachyandesite, quartz monzonite and agglomerate(oligomiocene).
In this area brecciated veins of barite – silicious and Cu,Pb,Zn sulfids and various pyrite type of mineralization have been identified. data processing have been carried out for analytical results(comparing main and duplicated samples data),and indicate normal distribution for Ni,Be ,Mn log distribution for other elements.That these two analysis method s,factor analysis and correlation matrix analysis (using standardizing the datas (x-x/s))have been consictent.
Regarding The composite haloes,the result of studies indicate Au,Ag,Be anomalies in eastern part of the area and Cu,Mo anomalies in western part of ARPACHAI valley. considering the lithology and its relation to geochemical anomalies of the area, probable presence of porphyric Cu mineralization in eastern part and epithermal high sulfide Au mineralization in quartz-barite veins are identifid,
