搜索结果: 1-15 共查到“地质学 uranium”相关记录20条 . 查询时间(0.03 秒)
中国地质大学科学技术发展院张帆（博士研究生），焦养泉*，等. 资源学院 构造与油气资源教育部重点实验室. AAPG Bulletin, JAN 2019. Enhancement of organic matter maturation due to radiogenic heat from uranium: A case study from the Ordos Basin in China
砂岩型；铀矿；碳质碎屑；成熟；演化；催化效应
2019/3/1
近日，中国地质大学资源学院焦养泉教授团队在国际顶级期刊《AAPG Bulletin》上刊发研究成果，首次报道发现了砂岩型铀矿对围岩碳质碎屑的成熟演化具有催化效应，即“碳质碎屑Ro的放射性催化效应”。国际同行给予了高度评价："I very welcome you case study on the radiogenic heat of uranium enhancement of organic m...
Timing of Metamorphism and Provenance of the Metamorphic Basement of the Xiangshan Uranium Orefield, Jiangxi Province, China
basement metamorphic rock detrital zircon sedimentary provenance Precambrian Jiangnan orogenic belt Xiangshan
2018/1/10
The origin, age and evolution of the Precambrian metamorphic basement of southern China provide useful insights into early crustal development. Here, we present new laser ablation–inductively coupled ...
Distribution of radon activity in the atmosphere above Wzgórza Niemczansko-Strzelinskie (South-WestPoland) and its dependence on uranium and thorium content in the underlying rock and indirect ground basement
radon atmosphere uranium thorium rock
2015/9/10
Radon activity in the atmosphere and its behavior in the environment have been investigated using LR-115 nuclear
track detector. The complex geological structure of Wzgórza Niemczansko-Strzelinskie (...
Diagenetic clay mineral distribution in Mesoproterozoic sandstones of the Cariewerloo Basin, South Australia – implications for uranium mobilisation
Diagenetic clay mineral distribution Mesoproterozoic sandstones the Cariewerloo Basin implications uranium mobilisation
2012/2/7
A thick sequence of largely undeformed red-bed sandstones of Mesoproterozoic age, collectively termed the Pandurra Formation, overlies a wide area of crystalline basement of the central and eastern Ga...
Geochemical controls on uranium precipitation in calcrete palaeochannel deposits of Namibia
uranium hydrogeochemistry geochemical modelling Namibia
2011/11/10
Palaeo-river channels containing calcrete are important potential hosts for economic uranium mineralization in many parts of southern Africa particularly Namibia. The main feature of these deposits ar...
Geochemical controls on uranium precipitation in calcrete palaeochannel deposits of Namibia
uranium hydrogeochemistry geochemical modelling Namibia
2011/11/7
Palaeo-river channels containing calcrete are important potential hosts for economic uranium mineralization in many parts of southern Africa particularly Namibia. The main feature of these deposits ar...
Uranium and lead adsorption onto bentonite and zeolite modified with polyacrylamidoxime
Adsorption Polyacrylonitrile Composite Aluminosilicate Uranium Lead
2011/9/7
Polyacrylonitrile (PAN) and bentonite (B)/zeolite (Z)-PAN composites were prepared by direct polymerization of acrylonitrile (AN) and AN adsorbed onto B and Z. PAN and the composites were subjected to...
Sorption of uranium(VI) on Na-attapulgite as a function of contact time, solid content, pH, ionic strength, temperature and humic acid
Attapulgite U(VI) Sorption pH Ionic strength Temperature
2011/5/14
Sorption of U(VI) from aqueous solution to Na-attapulgite was investigated at different experimental chemistry conditions by using batch technique. The attapulgite sample was characterized by FTIR and...
Adsorptive removal of uranium from aqueous solution using chitosan-coated attapulgite
Chitosan Attapulgite Adsorption Uranium
2010/6/9
Chitosan-coated attapulgite beads were prepared by coating chitosan on naturally and abundantly available attapulgite, and made into spherical beads to adsorb uranium from aqueous solutions. The beads...
Uranium exploration,non-governmental organizations,and local communities.The origin,anatomy,and consequences of a new challenge in Finland
uranium exploration environment non-governmental organizations public awareness
2009/10/21
The advent of global warming has returned nuclear power to the agenda. Many countries, including Finland, have decided to construct more nuclear power plants. They will need uranium, and its price is ...
Adsorption of uranium(VI) onto Ulva sp.-sepiolite composite
uranium(VI) sepiolite Ulva sp.-sepiolite composite
2008/7/21
Ulva sp. and sepiolite were used to prepare composite adsorbent. The adsorption of uranium(VI) from aqueous solutions onto Ulva sp.-sepiolite has been studied by using a batch adsorber. The parameters...
Wyartite: Crystallographic evidence for the first pentavalent-uranium mineral
Wyartite:Crystallographic evidence first pentavalent-uranium mineral
1999/9/6
Determination of the structure of wyartite provides the first evidence for a pentavalent-U mineral.
5+UO ) (CO )O (OH)(H O) , Z = 4, orthorhombic, a = 11.2706(8), bThe structure of wyartite, CaU
2 2...
Bioaccumulation of metals by lichens:Uptake of aqueous uranium by Peltigera membranacea as a function of time and pH
Bioaccumulation aqueous uranium by Peltigera membranacea pH
1998/11/30
Uranium sorption experiments were carried out at ;258 C using natural samples of the lichen Peltigera membranacea. Thalli were incubated in solutions containing 100 ppm U for up to 24 h at pH values f...
Mineralogical geochemical and mechanisms of fixation under oxidizing conditions inU the vicinity of the secondary U ore deposit at Koongarra, Australia,were examined usingtransmission and scanning e...
X-Ray Identification of One-Layer Illite Varieties: Application to the Study of Illites around Uranium Deposits of Canada
Hydrothermal alteration Illite Octahedral cation distribution Polytype Uranium deposits Vacant cis-sites Vacant trans-sites
1993/6/1
Structural and diffraction criteria for distinguishing between t-1M, c-1M, m-1M, and 3T illite varieties are described. The t-1M illite corresponds to a one-layer monoclinic structure with vacant tran...