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thorium

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Journal Article
Journal: Geology
Published: 17 January 2018
Geology (2018) 46 (3): 259-262.
... . Blundy , J. , and Wood , B. , 2003 , Mineral-melt partitioning of uranium, thorium and their daughters , in Bourdon , B. , ., eds., Uranium-Series Geochemistry: Mineralogical Society of America Reviews in Mineralogy and Geochemistry 52 , p. 59 – 123 , https://doi.org/10.2113/0520059...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.4
EISBN: 9781786203328
... of the uranium ( 238 U) decay chain and is the direct decay product of radium ( 226 Ra), and is considered to be the main radiological health hazard to the general population owing to its half-life of 3.82 days, which allows it to accumulate in the built environment. Thoron ( 220 Rn) is part of the thorium ( 232...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.10
EISBN: 9781786203328
..., and the uranium and thorium content of the subsurface geology. Concerning the radionuclides in groundwater, it was found that only 222 Rn shows a significant correlation with the below-ground uranium content. Furthermore, high uranium concentrations in groundwater emerged only in two special geological...
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Journal Article
Journal: Geology
Published: 16 November 2017
Geology (2017) 46 (1): 55-58.
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Journal Article
Published: 31 May 2017
European Journal of Mineralogy (2017) 29 (5): 871-887.
...-70176 Stuttgart 2017 Ilímaussaq South Greenland steenstrupine-(Ce) britholite-(Ce) alteration protonation ussingite veins thorium rare-earth elements mineral A4 mineral A5 mineral A6 Steenstrupine-(Ce) is a typical mineral of hypersodic rocks belonging to the Ilímaussaq massif...
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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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Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP422.5
EISBN: 9781862397460
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... and 100–300 pg of Th. Typically, contributions from blank were negligible, constituting less than 1/1000th of the total uranium and thorium analyzed. Isotopic measurements of 236 U/ 235 U, 234 U/ 235 U, 232 Th/ 229 Th, and 230 Th/ 229 Th were determined on a Finnigan MAT 262 thermal ionization mass...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2418(12)
Journal Article
Journal: Geology
Published: 01 March 2002
Geology (2002) 30 (3): 199-202.
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Journal Article
Journal: Geology
Published: 01 August 2000
Geology (2000) 28 (8): 683-686.
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Journal Article
Journal: Geology
Published: 01 August 2000
Geology (2000) 28 (8): 743-746.
... ). The alteration of monazite to huttonite also leads to the leaching of uranium, as indicated by the increase of Th/U ratios (18.6 to more than 88.7) from monazite to the Th-silicate phase. The selective leaching of uranium with respect to thorium implies that the diagenetic brines responsible for the alteration...
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Journal Article
Published: 01 July 2000
American Mineralogist (2000) 85 (7-8): 898-911.
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Journal Article
Published: 01 February 2000
The Canadian Mineralogist (2000) 38 (1): 67-79.
... differentielle des terres rares légères et du thorium au cours de l’interaction de roche et H 2 O. Dans les conditions ambiantes de température et de pression dans ce contexte, les terres rares légères étaient davantage solubles et, ainsi, ont été mobilisées sur une plus grande échelle que le thorium...
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Journal Article
Published: 01 February 2000
The Canadian Mineralogist (2000) 38 (1): 81-100.
... degré d’altération augmente, il y a corrosion importante et remplacement de l’allanite par la fluorite, un phosphate de TR , Th et P (probablement monazite), et un minéral riche en Th (probablement thorianite). Malgré l’attaque par des solutions riches en fluorures, les terres rares et le thorium...
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Journal Article
Journal: Geology
Published: 01 November 1999
Geology (1999) 27 (11): 963-966.
Journal Article
Journal: Geology
Published: 01 September 1999
Geology (1999) 27 (9): 847-850.
Journal Article
Published: 01 September 1999
Geological Magazine (1999) 136 (5): 543-560.