A study is presented on the distribution of thorium and radium isotopes in sediments, suspended matter and water collected along Jucar river (East of Spain), using low-level CC-spectrometry. The first aim of this work is to study the thorium and radium activity in water, sediment and suspended matter and their dependence on pH, temperature, conductivity and sediment sizes along Jucar river. The...

The hydrolysis of the thorium(IV) ion in various concentrations of magnesium, calcium, strontium and barium chloride media was studied by the emf method at 25 °c. The data show that the extent of thorium hydrolysis decreases with increasing concentration and hydration energy of the medium ions. The contribution of the concentration of the medium ions to the total medium effect is higher than th...

The northwest corner of the MoonÕs South Pole-Aitken (SPA) basin contains a high abundance of thorium and a unique Imbrian aged geomorphologic unit that consists of Ògrooves and moundsÓ (referred to here as the Imbrian grooves). Because the location of these features are almost antipodal to the Imbrium basin, where high-thorium ejecta and seismic energy are expected to have converged, an Imbriu...

In the last ten years, the use of gamma-ray spectrometry for geological mapping and mineral exploration has shown considerable growth. With this growth, standardized procedures have been developed for the calibration and processing of the airborne measurements so that they will be independent of survey parameters. This paper describes some of the new developments to convert airborne data to gro...

The South Pole-Aitken basin (SP-A) is the largest and oldest basin on the Moon. The basin has usually been interpreted to exhibit a degraded circular structure, but here we demonstrate that the topography, iron and thorium signatures of the basin are well described by ellipses with axes measuring 2400 by 2050 km and centered at 53 , 191 E. Topography, abundances of iron, thorium, and the distri...

Electron antineutrinos accompanying the β-decays of long-lived isotopes of uranium, thorium, and potassium in the earth carry information about the quantity and distribution of these geologically important, heat-producing isotopes. This letter discusses terrestrial antineutrino flux measurements at both a continental and an oceanic site. A combined analysis of both measurements provides informa...

________________________________ _________ _ Introduction and acknowledgments __________________ _ Distribution of uranium and thorium in igneous rocks __ _ ~age 91 91 92 Processing ________________ ___ ___ ___ ______ _________ _ Energetics and ·cost ________________ ----------------Conclusions ______________________ ___ _______ ______ _ Page