Identifikasi mineral kalsit di kawasan sungai desa Sumbermiri kecamatan Lengkong kabupaten Nganjuk dengan metode geomagnet

This research aims to identify the mineral rocks that are found in river village districts of Sumbermiri village, Lengkong district, Nganjuk regency. XRF tests have been conducted on a rock an result was 57 percent is calcite minerals. He method used geomagnetics, by measurig value total magnetic field area using magnetometer. Data collection done three times at each point, then retrieved data with smallest noise be processed. Corection calculation daily (diurnal) and IGRF corection. location 33281,4, degree inclination 25,9993 declination 8,1201. Then has performed contour Surfer 10 Magpick transform see contours surface magnetics field. Interpretation results indicates content study area. Mag2DC modeling obtained 2D transversely. On first line, indentified susceptibility -2,955 - -0,651 misfit 747,79. Second line -0,897 -0,249 592,35. Third -0,509 -0,005 867,85.