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radium

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Journal Article
Published: 29 May 2020
Geochemistry: Exploration, Environment, Analysis (2020) 20 (4): 408–424.
... and Hydrogeochemical Studies on the Inter-stratal Water in Farafra Oasis, Western Desert, A. r. Egypt . MSc thesis, Cairo University , Egypt . Hamza , M.S. , Swailem , F.M. and Abdel Monem , A.A. 1982 . Groundwater hydrology of Wadi El-Natrun. Distribution of radium and deuterium contents...
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Journal Article
Published: 01 December 2019
American Mineralogist (2019) 104 (12): 1806–1819.
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Journal Article
Published: 24 July 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (3): 257–267.
...M. W. Clark; J. J. Harrison; T. E. Payne; M. J. Comarmond; S. Thiruvoth; H. Wong; L. Mokhber Shahin Abstract The pH-dependence and reversibility of radium (Ra) and strontium (Sr) binding to a modified bauxite refinery residue (MBRR), and the effects of sample ageing, were studied in laboratory...
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Journal Article
Published: 01 March 2019
European Journal of Mineralogy (2019) 31 (2): 247–262.
... by counter-diffusion of BaCl 2 and Na 2 SO 4 solutions. Radium co-precipitation is taken into account by assuming a fixed partition coefficient and constant Ra concentration at the BaCl 2 injection boundary. Both homogeneous and heterogeneous growth were considered. Critical CNT parameters, particularly...
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Journal Article
Published: 19 November 2018
Geochemistry: Exploration, Environment, Analysis (2019) 19 (3): 245–254.
... distribution mapping radionuclides 210 Pb polonium radium thorium uranium nanoSIMS Uranium and thorium and their daughter isotopes occur naturally throughout the environment, from soils and streams to mountains and oceans. Brick and concrete, copper and steel, even the food we grow...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.5
EISBN: 9781786203328
... of the radioactive nuclei that poses the lung cancer risk. The concentration of 220 Rn in room air accounts, on average, for approximately 4% of the total annual radiation dose received by a member of the public in the UK. Fig. 2. Radium 226 decay series. Adapted from figure N.1 of Argonne National...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.4
EISBN: 9781786203328
...Abstract Abstract Radon is generally regarded as a naturally occurring radiological hazard but we report here measurements of significant, hazardous radon concentrations that arise from man-made sources: for example, radium-dial watches. This study is an examination and assessment of health...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.10
EISBN: 9781786203328
...). 228 Ra, 210 Pb and 210 Po are determined after several radiochemical separation steps ( Figs 4 – 6 ). The 1 l sample is evaporated, and 210 Pb and 210 Po, together with other radionuclides, are precipitated and separated from radium as sulphides. Radium stays in the solution and is then co...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.8
EISBN: 9781786203328
... was greatly improved thanks to the outstanding detailed work of two reviewers. This is IPGP contribution No. 3731. Abstract Abstract Effective radium-226 concentration, EC Ra , is the product of radium activity concentration, C Ra , multiplied by the emanation coefficient, E , which is probability...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.3
EISBN: 9781786203328
... The authors are grateful to Ulrich Koch (Saxon Academy of Sciences at Leipzig, Bad Brambach, Germany) for the opportunity to measure radon and radium concentrations at Bad Brambach, Saxony, Germany. We thank Carmen Ródenas for sharing her database. The original manuscript was significantly...
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Journal Article
Journal: Economic Geology
Published: 01 August 2017
Economic Geology (2017) 112 (5): 1231–1245.
... radiometric techniques to establish the frequency and duration of hydrothermal activity at that site, information that is vital when establishing the time elapsed to amass an ore deposit. In each case, the radiometric dating relied on the radium isotopes 228 Ra and 226 Ra with half-lives of 5.75 and 1,600...
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Journal Article
Published: 01 July 2017
American Mineralogist (2017) 102 (7): 1375–1383.
... . Broecker , W.S. , Li , Y.H. , and Cromwell , J. ( 1967 ) Radium-226 and radon-222—concentration in Atlantic and Pacific oceans . Science , 158 , 1307 – 1310 . Corfu , F. ( 2012 ) A century of U-Pb geochronology: the long quest towards concordance . Geological Society...
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Journal Article
Journal: Geology
Published: 01 April 2017
Geology (2017) 45 (4): 363–366.
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Journal Article
Journal: Geology
Published: 01 February 2017
Geology (2017) 45 (2): 147–150.
... acknowledges a Humboldt Research Award. 1 GSA Data Repository item 2017037, sample details, petrography, analytical techniques, fractional crystallization modeling, radium deficits, Tables DR1–DR5, and Figures DR1–DR4, is available online at http://www.geosociety.org/pubs/ft2017.htm or on request...
Journal Article
Published: 01 June 2016
Journal of Sedimentary Research (2016) 86 (6): 668–682.
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Journal Article
Published: 01 September 2015
Russ. Geol. Geophys. (2015) 56 (9): 1273–1280.
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Journal Article
Journal: Geology
Published: 01 June 2015
Geology (2015) 43 (6): 551–554.
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Journal Article
Journal: Clay Minerals
Published: 01 June 2015
Clay Minerals (2015) 50 (2): 221–232.
... 110.69, 71.52, 576.48 and 0.447 Bq/kg, respectively. The radium equivalent activities in the peloid samples ranged from 63.3 to 766.77 Bq/kg. The absorbed dose rate (D out ) varied between 37.52 and 330.67 nGy/h and most of the observed spa doses are greater than the worldwide recommended values...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 2015
AAPG Bulletin (2015) 99 (2): 181–206.
... by checking the charge balance and by comparing the results of duplicate samples. The majority of the data in Table  1 had charge balance errors <5% and nearly all were <10%. Analyses with errors ≥15% were discarded. Radium activities were determined by the USGS Radioisotopes Laboratory in Reston...
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Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP422.3
EISBN: 9781862397460
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