Geophysical exploration of titanomagnetite ore deposits by geomagnetic and geoelectric methods

Abstract

Geophysical techniques, such as magnetic and geoelectric ones, are useful for ore deposit exploration, represented by titanomagnetite. Titanomagnetite is a mineral composed of oxides of titanium and iron. Forty-seven magnetic profiles have been measured using two proton magnetometers to cover the study area with a direction perpendicular to the ore outcrops. The qualitative interpretation of magnetic data indicates elongated highly magnetized anomalies extending northeast to southwest. The quantitative interpretation of magnetic data was carried out using 2D magnetic inversion. The results of the magnetic interpretation indicated ore deposits at < 10 m depth in the area with highly magnetic anomalies, and the magnetic anomalies related to the titanomagnetite ore bodies have a tabular form with thickness ranging from 7 to 100 m. Seven vertical electrical soundings were carried out along selected sites according to the geologic map and field observation for the geologic features of the ore bodies in the study area. The results of resistivity inversions indicated that there are many conductive bodies, which have resistivity values < 100 Ω m. Three electric resistivity tomography lines are made trending east-west perpendicular to the direction of exposed ore in the area. The profiles were processed using the finite element algorithm available in the Res2dinv program, and the generated models delineate the shape and orientation of the supposed ore.

Pendugaan Kedalaman Air Tanah Dengan Geolistrik Resistivitas Di Desa Tegalweru, Kecamatan Dau, Kabupaten Malang

“…Titik geolistrik terletak bagian barat lahan no 01 (Gambar 5) atau di jalan untuk kegiatan pertanian warga sekitar [15]. Pemilihan lokasi telah disetujui oleh pemilik lahan.…”

Geophysical Assessment of Structurally Controlled Mineral Resources at Wadi El-Nakheel, Eastern Desert, Egypt

“…The magnetic method is sensitive to some highly magnetized minerals; the presence of these minerals in different ratios in different types of sediments makes this method a potent tool for differentiating rock types. Mineral exploration using the magnetic method has been applied by many authors in similar geological settings [11][12][13][14][15][16][17].…”