TN579 : Exploration copper-chromite deposits in Torbat heydaiyeh (Robatsefid) using the integration of geophysics, geochemistry, geological and remote sensing data in GIS environment
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2015
Authors:
Amir Kashefi [Author], Mansour Ziaii[Supervisor], Mehdi Ziaii [Advisor]
Abstarct: The zone of Torbat heydaryeh is located in mextallogenic belt Torbat_Sabzevar chromite with an area of over 10000 square kilometers is in the East of Iran. Formations of this ultrabasic and ophiolite melange belt includes dunite host rock and contain copper, manganese, small and medium chromite deposits. The aim of this study is potential mapping in Robatsefid for exploration of chromite and copper using an integration with Weight of evidence and fuzzy logic methods in GIS. For extraction the exploration indices, study and processing of geological data, linear structures, geochemical data, aeromagnetic data and remote sensing images were used. Processing of ASTER remote sensing data to study the area in the ENVI software to isolate and separate the chromite deposits and copper-related alterations were carried out. Geochemical data after pre-processing, was done for mapping geochemical optimal potential with univariate, multivariate methods and zonalite method (Solovov) and geochemical compound-halo. Aeromagnetic data processing was performed with the aim of detecting faults and magnetic anomalies in the application GEPSOFT (OASIS MONTAJ). Finally, by exploration integrating data with weight of evidence and fuzzy logic methods in ArcGIS software, map the potential were presented for study area. baxsed on the optimal potential maps obtained by these methods, eventually prone area have been identified and was referred for further evaluation. To validate the potential of maps obtained from fuzzy logic, copper's index and also hits of the ground in region have used. The favorable potential map for exploration of chromite in semi-detailed, areas with a higher likelihood than 4 times as prior probability with an area of 30 square kilometers, about 1/2 percent of the total study area were identified as high potential. Also baxsed on the Copper potential map, a series of high potential areas have been identified where the first priorities exploration areas are 1 and 2 and the next priorities zone exploration are 3, 4 and 5.
Keywords:
#Chromite #Copper #Mapping potential #Weight of evidence #Fuzzy logic #Robatsefid #Iran Link
Keeping place: Central Library of Shahrood University
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