Integrated Geophysical Methods In Base Metal Exploration And Studies Of Shear Structures In Katta Ii Wonega

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The Katta n area is situated in the western wollega, about 7 km east of the Nejo two. This rnarea belongs to the Nejo series metasedimen1Iy metavolcanic and intrusive rocks of the rnUpper Proterozoic metamorphosed in the greenschist facies. Phyllite, different types of rnschists including graphitic schist, quartzite, gossaniferrous and metavolcanic are the prevalent rnrock types in K.atta n. rnA large number of geological investigation and borehole drilling in Katta n were carried out rnin the years between 1970 and 1982. As a result, occurrences of copper, nne, lead, gold and rncobalt are reported. rnThe purpose of this paper is mainly to outline the concepts of using integrated geophysical rndata to delineate the position of structw"al features and identify the base metal mineralization rnzone and thereby determining the most probable locations of economic importance. For this rnpurposes reevaluation of the existing IP lresistivity data and detailed magnetic and EM rnsurveys were done. The results of the qualitative interpretation are presented and discussed rnin relation to the available geological, geochemical and borehole infonnation. The rninterpretation is made on the bases of experimental, theoretical, and field model curves. rnPreliminary results show that shear structures control the mineralization. The investigation rnfurther indicates that the abundance of graphitic schist in the study area causes serious rninterpretational problem. rnFor thorough understanding of the anomalous zones and their qualitative description, rnfrequency domain IP, gravity, radiometric swveys and quantitative interpretation of the rnmagnetic data are proposed.

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Integrated Geophysical Methods In Base Metal Exploration  And Studies Of Shear Structures In Katta Ii Wonega

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