thorium uranium potassium

  • Potassium, Rubidium, Strontium, Thorium, Uranium, and the ...

    The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 x 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks.

  • Thorium, uranium and potassium concentrations in granites ...

    The uranium and thorium content of these older rocks, measured by gamma-ray spectrometry, is more than twice the average for silicic igneous rocks in general. Younger granites of the area also have high concentrations, suggesting that this is a uranium-thorium-rich province.

  • Uranium, thorium, and potassium in black shales of the ...

    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 K-feldspar. The U content is 345 ppm at high apatite concentration (7%).

  • ABUNDANCES OF URANIUM;THORIUM, AND POTASSIUM …

    content is stated, radium-equivalent uranium is implied. 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 radium-equivalent uranium and thorium and about 1 percent for potassium.

  • Potassium, Rubidium, Strontium, Thorium, Uranium ... - Science

    The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 x 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks.

  • Fluvial Sequence Stratigraphy using Thorium & Potassium

    Mar 28, 2011· Spectral Gamma-ray logging, in which Thorium (Th), Potassium (K) & Uranium (U) gamma-ray wavelength are distinguished, allows the differentiation of these three mayor radio-isotopic sources. Analysis of the sources of the natural gamma radiation can provide information on the composition and likely lithology of a formation.

  • Facts About Thorium - Live Science

    Named for the Norse god of thunder, thorium is a silvery, lustrous and radioactive element with potential as an alternative to uranium in fueling nuclear reactors. In 1815, Jöns Jakob Berzelius ...

  • Crain's Petrophysical Handbook - Clay Mineralogy From Pe ...

    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.

  • What percent of the Earth's core is uranium? - Earth ...

    Potassium 40, with a half-life of 1.277 billion years, Uranium 238, with a half-life of 4.468 billion years, and; Thorium 232, with a half-life of 14.056 billion years. The consensus view amongst geochemists is that there is very little, if any, of any of these isotopes in the Earth's core. Potassium, thorium, and uranium are chemically active.

  • 12. THE SPECTRAL GAMMA RAY LOG 12.1 Introduction

    coming from each of potassium-40, the uranium-radium series, and the thorium series for a particular formation. ... Figure 12.4 Thorium/potassium cross-plot for mineral identification using spectral gamma ray data. Figure 12.5 Thorium/potassium ratio plot for mineral identification using spectral gamma ray data. Th/K (ppm/%) 1 10 100 Weathering ...

  • Radioactivity : Potassium 40

    Potassium 40 is a radioisotope that can be found in trace amounts in natural potassium, is at the origin of more than half of the human body activity: undergoing between 4 and 5,000 decays every second for an 80kg man. Along with uranium and thorium, potassium contributes to the natural radioactivity of rocks and hence to the Earth heat.

  • Crain's Petrophysical Handbook - Natural Gamma Ray And ...

    In gamma ray spectral logging, the three main gamma ray contributors, potassium, thorium, and uranium, give gamma rays of different energy levels. By appropriate filtering, the total gamma ray flux can be separated into the three components.

  • KGS--Geological Log Analysis--Organic Mudstones

    Potassium, Uranium, Thorium (KUT) Curves. 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. Since uranium is linked with ...

  • Determination of uranium, thorium and potassium activity ...

    Jun 29, 2007· INTRODUCTION. Radioactivity of soil environment is one of the main sources of exposure to humans. Hence it is important to know its distribution, gamma radiation from radionuclides which are characterised by half-lives comparable to the age of the earth, such as 40 K and radionuclides from the 238 U and 232 Th series. Their decay products represent the main external source of …

  • The Chemistry Joke That Got a Student Suspended - The Atlantic

    May 20, 2014· Paris Gray, upstanding vice president of her about-to-graduate high-school class in Jonesboro, Georgia, was suspended last Friday when administrators figured …

  • URANIUM, THORIUM, AND POTASSIUM IN SOILS ALONG THE …

    Thorium, uranium, and potassium concentrations in specific areas near the lake are somewhat higher than average concentrations around the world. Visual inspection of Lake Issyk-Kyol's white, sandy beaches near the towns of Bokonbaevo and Kadji-Sai show a

  • The distribution of thorium, uranium, and potassium in the ...

    Thorium tends to increase with potassium, The distribution of thorium, uranium, and potassium in the Mancos shale 1131 giving a nearly constant K/Th ratio of about 2200. The variations in the amount of potassium are slight (see Table 1) and it is difficult to interpret the data.

  • Gamma-ray spectrometer calibration for field analysis of ...

    The calibration of a portable three-channel gamma-ray spectrometer for in situ analysis of thorium, uranium, and potassium is discussed. A method of regression analysis is suggested as the best means of including all of the data available from the calibration stations. Calibration indicates a nonlinear relation between count rates obtained in the field and concentrations in parts per million ...

  • Determination of thorium, uranium, and potassium elemental ...

    Determination of thorium, uranium, and potassium elemental concentrations in surface soils in Cyprus Michalis Tzortzis and Haralabos Tsertos* Department of Physics, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus. (Revised version: 8/03/2004) Abstract A comprehensive study was conducted to determine thorium, uranium and potassium

  • Uranium, thorium, potassium and argon in marine …

    Uranium, thorium, potassium and argon in marine phillipsites M~CHEL BERNAT,* RUDOLF H. BIERI, WORU KOIDE, JOHN J. GRIFFIN and EDWARD D. GOLDBERG Scripps Institution of Oceanography, University of California at San Diego La Jolle, California 92037 (Received 23 April 1970; accepted in revised form 26 illay 1970)

  • Spectral gamma ray logs - petrowiki.org

    This uranium can produce what appear to be hot sands on a gross gamma ray log. Using the uranium-free gamma ray curve from a spectral tool (CGR, in Schlumberger's mnemonics) can circumvent this problem and improve sand/shale discrimination in such environments. Occasionally, the ratio of thorium to potassium can be exploited in clay typing.

  • 12. THE SPECTRAL GAMMA RAY LOG 12.1 Introduction

    Petrophysics MSc Course Notes Spectral Gamma Ray Log ... coming from each of potassium-40, the uranium-radium series, and the thorium series for a particular formation. ... Figure 12.4 Thorium/potassium cross-plot for mineral identification using spectral gamma ray data. Figure 12.5 Thorium/potassium ratio plot for mineral identification using ...

  • DETERMINATION FOR LEVELS OF RADIONUCLIDES OF …

    the dry season while Uranium, Thorium and Potassium were beyond the limit of detection during the wet season The ED-XRF technique showed that 31.40±0.14 ppm of Potassium was present in algae during dry the season. Uranium, Thorium and Potassium were beyond detection limit in the water samples using ED-XRF.

  • Potassium, rubidium, strontium, thorium, uranium, and the ...

    The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 ?? 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks.

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