Results 81 to 90 of about 116,148 (294)
Geological Journal, EarlyView.A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
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Uranium is a naturally occurring radioactive element.It is found in very small amounts in nature in the form of minerals, but may be processed into a silver-colored metal .
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Geological Journal, EarlyView.U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid +9 more
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Review of recent developments in uranium extraction technology.
, 1978 Developments in uranium ore processing technology since the AAEC Symposium on Uranium Processing in July 1972 are reviewed. The main developments include the use of: - autogenous or semi-autogenous grinding, - benefication techniques such as radiometric ...
Crawford, RE, Alfredson, PG, Ring, RJ
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The relationship between cellular protein content and selenium accumulation in freshwater microalgae
Integrated Environmental Assessment and Management, EarlyView.Abstract Variability in the bioconcentration of selenium (Se) by primary producers at the base of the food web results in uncertainty in predictions of bioaccumulation and ecological risk to higher trophic level organisms. Water chemistry, speciation of Se, and periphyton community composition have all been suggested as factors that contribute to ...
Courtney Bogstie +3 more
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United States Department of Energy Grand Junction Office Report PGJ/F-053(82)
, 1982 Appendices containing data on uranium availability in the Salina Quadrangle to accompany a report on U.S.
Franczyk, K.J., Cornellisson, Joseph L.
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Managing and visualising geochemical data for tephra correlation with the IntChron Integration Tool
Journal of Quaternary Science, EarlyView.ABSTRACT There is now a wealth of glass‐shard geochemical data for volcanic ash (tephra) layers from a wide range of volcanoes and eruptions, providing invaluable datasets for tephrochronology. However, compilation of published data to assess tephra correlations leads to large files and requires careful management.
Victoria C. Smith +5 more
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, 1981 From abstract: Results of a reconnaissance geochemical survey of the Dallas Quadrangle, Texas are reported. Field and laboratory data are presented for 284 groundwater and 545 stream sediment samples.
National Uranium Resource Evaluation Program
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Yuanzineng kexue jishuSignificant breakthroughs have been made in the exploration of sandstone uranium deposits in the Qianjiadian area of the Songliao basin. The widespread development of basic magma intrusions in the region, along with their increasing relevance to the ...
DING Bo1, 2, LIU Hongxu1, 2, HUANG Shaohua1, 2, LIU Chiheng1, 2, QIU Linfei1, 2, HE Feng1, 2
doaj +1 more source
Southern Portugal hydroclimate of the last millennium from near‐annually resolved speleothem records
Journal of Quaternary Science, EarlyView.ABSTRACT Hydroclimate in Portugal is influenced by the North Atlantic subtropical high‐pressure system (the Azores High) and by internal climate modes, most prominently the North Atlantic Oscillation, which may shift in position and/or intensity due to anthropogenic climate change.
Alaina Chormann +10 more
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