Magnetic and Radiometric Signatures of Rocks and Soils

ISBN-13: 9783639313086 / Angielski / Miękka / 2010 / 168 str.

Moikwathai Moidaki

Opis

The main objective of this research is to determine the magnetic properties and radiometric signatures of rocks and soils in eastern Botswana, east of longitude 25.5oE and south of latitude 22oS. Magnetic susceptibilities were measured using a Bartington instrument and thermomagnetic curves were generated for selected samples. Selected anomalies from magnetic data were modelled to determine source, dimensions and configurations with measured magnetic susceptibility from soil and rock samples as constraints. The models reveal shallow magnetic sources of infinite depth extent with dip angles ranging from 80o to 150o and average half width ranging from 127 m to 1300 m. Radiometric ratio maps (U/Th, U/K, Th/K) were determined from the elemental maps of uranium, thorium and potassium and profiles were extracted from the grid ratios. The ratio patterns and the ratio profiles enhanced slight variations in elemental concentrations due to lithological changes or alteration processes associated with mineralization.

O autorze

My name is Dr. Moikwathai Moidaki. I come from Bobonong Village in Botswana. I completed my MSc in Physics in 2001 from the University of Botswana and completed PhD in geophysics (Seismology)in 2009 from Missouri University of Science and Technology in the United States of America. Currently I am a Physics Lecturer at the University of Botswana.