PDF | Uranium, thorium and potassium contents in 16 different rock samples from various sites in Republic of Yemen were determined using three different techniques of analysis: γspectrometry ...

Uranium is associated mainly with organic matter and partly with apatite (phosphate clasts of fish skeletons) and calcite; thorium, with clay minerals; potassium, with clay minerals and Kfeldspar. The U content is 345 ppm at high apatite concentration (7%).

Uranium, potassium, and thorium contour maps derived from a helicopter gammaray spectrometer survey of the Getchell Trend, Humboldt County, Nevada

The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, ; Sr, 120; Th, ; and U, The ratio Sr 87 to Sr 86 is about, that of K to U is x 10 4, and of Th to U is

Potassium, rubidium, strontium, thorium, uranium, and the ratio of strontium87 to strontium86 in oceanic tholeiitic basalt

Potassium gives a depth scale for the primary differentiation of the crust. Thorium gives the depth scale of magmatic or metamorphic fluid circulation. Finally, the uranium distribution reflects the late effects of alteration due to meteoric water.

Natural gamma rays are emitted by isotopes that are the natural products (daughter products) of the uranium decay series, the thorium decay series, and potassium40. Uranium and thorium each decay into a series of unstable (radioactive) daughter products.

The purpose of this research is to study the use of the. actinides uranium and thorium as atmospheric oxygen indica¬. tors and thereby to gain more knowledge .

rayonnement gamma de l'uranium et du thorium sont désignées comme des équivalents d'uranium et des équivalents de thorium, soit éU et éTh. Les plages d'énergie utilisées pour mesurer le potassium, l'uranium et le thorium sont respectivement : de 1 370 à 1 570 keV, de .

Discovery of Thorium. To isolate thorium metal, Berzelius found the most effective method was to react thorium chloride with potassium, to yield potassium chloride and thorium. (Berzelius made thorium chloride by mixing thorium oxide with carbon and heating to redheat in a stream of chlorine gas.)...

Radioactivity in minerals are caused by the inclusion of naturallyoccurring radioactive elements in the mineral's composition. The degree of radioactivity is dependent on the concentration and isotope present in the mineral. For the most part, minerals that contain potassium (K), uranium (U), and thorium .

8 parts per million (ppm) for thorium and uranium, and as a percentage (%)for potassium. The total uncertainty of the radioactivity measurements, which is also applicable to the extracted Th, U, and K elemental concentration values, was typically in the range 3−10%.

[Uranium, thorium and potassium contents and radioactive equilibrium states of the uranium and thorium series nuclides in phosphate rocks and phosphate fertilizers]. Thorium contents were found to be, in general, low and appreciable disequilibrium of the thorium series nuclides was not observed except one sample. Potassium contents were also very low (less than % K2O) except for complex fertilizers. .

Jul 17, 2011· Radioactive decay of uranium, thorium, and potassium in Earth's crust and mantle is a principal source, and in 2005 scientists in the KamLAND collaboration, based in Japan, first showed that there was a way to measure the contribution directly. The trick was to catch what KamLAND dubbed geoneutrinos – more precisely,...

The coefficient of variation for the accuracy of the radioelement data, when compared to ana lyses by isotope dilution and flame photometry is about 3 percent for radiumequivalent uranium and thorium and about 1 percent for potassium.

The can encapsulates the reactor, called the "pot," which contains molten fuel salt—a homogeneous mixture of sodium, beryllium, and thorium fluorides with lowenriched (%) uranium235 (LEU).

1 Determination of thorium, uranium, and potassium elemental concentrations in surface soils in Cyprus Michalis Tzortzis and Haralabos Tsertos* Department of Physics, University of Cyprus, Box 20537, 1678 Nicosia, Cyprus.

Unlike uranium which is mobile element in soil surface, thorium, potassium and cesium has low mobility and their concentrations in soil reflect these variation in parental material, their distribution in soil being dependents by pH, organic matter content, clay minerals from soils.

Noncolloidal thorium (thorium nitrate) injected in rats concentrated in a nonsoluble form in bone marrow macrophages, hepatocytes and Kupffer cells. These deposits of thorium associated with phosphorus can be explained by the formation of thorium phosphate in lysosomes that remain in tissue for a long time.

Potassium Figure 2: Plot of the Thorium concentration vs. the Potassium concentration 6. Summary and Conclusions In conclusion, we demonstrate a clear statistical distinction between Potassium and ThoriumUranium. We see that the higher K/Th ratio is located around Imbrium with moderate to high Thorium content.

If thorium and/or potassium are low, and uranium is high, then the rock is not shale. Other data such as PE, density, and neutron are then used to define the porosity and rock type. However, if thorium or potassium is high, with or without uranium, then some shale should be suspected, and accounted for.

The Thorium, Uranium and Zirconium Concentrations in Bauxites and Their ... thorium and uranium lie well within these boundaries; ... with high thoriumtouranium (Th/U) ratios. Potassium 9 measurements are thought to he accurate to within ±5 of the amount present.

The Woodford Shale shows slightly higher potassium and slightly lower thorium levels than the Kinderhook Shale, which suggests that it may have a higher illite content. The uranium curve is scaled in ppm and reaches a maximum of about 43 ppm at the top of the Woodford Shale.

Uranium and thorium are trace elements; their concentrations rarely exceed a few tens of parts per million. Potassium, on the other hand, is a major element in many rocks, and its concentration is given in any complete chemical analysis.