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۱Identifying Hydrothermal Alteration: Geochemical Particulars based on Lithogeochemical Data from the Kahang Cu Porphyry Deposit, Central Iran
اطلاعات انتشار: Iranian Journal of Earth Sciences، پنجم،شماره۱، Apr ۲۰۱۳، سال
تعداد صفحات: ۱۲
Kahang Cu Porphyry deposit is situated in the central part of a major Iranian magmatic belt, Urumieh–Dokhtar, in central Iran.There are several sub–volcanic stocks (e.g., porphyric granitoids rocks, quartz monzonite, diorite and monzodiorite–monzogranite)within Eocene volcanic and pyroclastic rocks consisting of basaltic, trachy–andesite and dacitic rocks. Hydrothermal alterations at the Kahang deposit have an extended range and exhibit a concentric zoning pattern including potassic, phyllic, argillic and propylitic from the center to the margin. The aim of this study was to identify geochemical particulars by geochemical applications in 184 rock samples in these potassic, phyllic and argillic alteration zones. The results of this study show that there are high values of K, Mg and Cu in the potassic zone (located in the central part), main Mo anomalous parts and high Cu values can be found in the phyllic zone (eastern part), and high values of Au, Ti and Al are concentrated in the argillic zone (western part) . Overall, the Kahang deposit hosts Cu, Mo and Au mineralization in these three zones

۲Identifying Hydrothermal Alteration: Geochemical Particulars based on Lithogeochemical Data from the Kahang Cu Porphyry Deposit, Central Iran
اطلاعات انتشار: Iranian Journal of Earth Sciences، پنجم،شماره۱، Apr ۲۰۱۳، سال
تعداد صفحات: ۱۲
Kahang Cu Porphyry deposit is situated in the central part of a major Iranian magmatic belt, Urumieh–Dokhtar, in central Iran.There are several sub–volcanic stocks (e.g., porphyric granitoids rocks, quartz monzonite, diorite and monzodiorite–monzogranite)within Eocene volcanic and pyroclastic rocks consisting of basaltic, trachy–andesite and dacitic rocks. Hydrothermal alterations at the Kahang deposit have an extended range and exhibit a concentric zoning pattern including potassic, phyllic, argillic and propylitic from the center to the margin. The aim of this study was to identify geochemical particulars by geochemical applications in 184 rock samples in these potassic, phyllic and argillic alteration zones. The results of this study show that there are high values of K, Mg and Cu in the potassic zone (located in the central part), main Mo anomalous parts and high Cu values can be found in the phyllic zone (eastern part), and high values of Au, Ti and Al are concentrated in the argillic zone (western part) . Overall, the Kahang deposit hosts Cu, Mo and Au mineralization in these three zones

۳Separation of Geochemical Anomalies Using Factor Analysis and Concentration–Number (C–N) Fractal Modeling Based on Stream Sediments Data in Esfordi 1:100000 Sheet, Central Iran
نویسنده(ها): ، ،
اطلاعات انتشار: Iranian Journal of Earth Sciences، پنجم،شماره۲، Oct ۲۰۱۳ ، سال
تعداد صفحات: ۱۱
The aim of this study is separation of Fe2O3, TiO2 and V2O5 anomalies in Esfordi 1:100,000 sheet which is located in Bafq district, Central Iran. The analyzed elements of stream sediment samples taken in the area can be classified into 5 groups (factors) by factor analysis. The Concentration–Number (C–N) fractal model was used for delineation of the Fe2O3, TiO2 and V2O5 thresholds. According to the thresholds, the distribution of elemental concentration for Fe2O3 and TiO2 were divided to four lassifications and V2O5 has five geochemical populations in the area. Based on correlation between obtained results with geological and remote sensing data, the results show that the major anomalies of Fe2O3, TiO2 and V2O5 and related factor are mostly situated around granitic\rhyolitic rocks, iron alterations and along faults.
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