Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    40 Ar/ 39 Ar dating of the KBS Tuff in Koobi Fora Formation, East Rudolf, Kenya (1976)
    [s.l.] : Nature Publishing Group
    Nature 263 (1976), S. 740-744 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] 40Ar/39Ar and conventional K–Ar age determinations on volcanic sanidine–anorthoclase crystal concentrates from pumice lumps contained within the KBS Tuff in the Koobi Fora Formation at East Rudolf indicate an apparent age near 2.42 Myr. Recomputation of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/263740a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    K–Ar dating of the Pleistocene fossil hominid site at Chesowanja, North Kenya (1979)
    [s.l.] : Nature Publishing Group
    Nature 282 (1979), S. 710-712 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A summary of the stratigraphical sequence is shown in Fig. 1. The top 2 m of the Chemoigut sediments have been baked by the lower flow of the Chesowanja basalt which was exposed long enough to develop a red weathering profile on its surface before being covered by the upper flow. This in its turn ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/282710a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Microbial influence on the sorption of137Cs onto materials relevant to the geological disposal of radioactive waste (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 549-552 
    Details
    ISSN: 1420-9071
    Keywords: Microbiology ; radioactive waste ; geology ; radionuclide sorption ; 137Cs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A major concern in the geological containment of radioactive wastes is the speed of movement of radionuclides from the repository, after their eventual leaching and release, into the geosphere and finally into the biosphere. Radionuclide sorption onto the host rock is an important retarding mechanism. Experimental evidence shows that the presence of microbes in this environment influences the sorption capabilities of the host rock. Their presence can decrease the amount of retardation of137Cs, a common radionuclide in radioactive waste, by the solid phase. Sorption methods and data analysis procedures are presented and the implications for radioactive waste disposal assessments are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01949876
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Helium isotopes in North Sea gas fields and the Rhine rift (1985)
    [s.l.] : Nature Publishing Group
    Nature 318 (1985), S. 273-275 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 and Fig. 1 show 3He/4He and He/Ne ratios for 10 natural gas samples from the UK shelf and mainland; analyses were made as described elsewhere3. Nine of the samples are from the North Sea basins including the Ninian, Frigg, Forties fields in the north, and Placid, Indefatigable, Viking, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/318273a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Uranium-mineralized micro-organisms associated with uraniferous hydrocarbons in southwest Scotland (1990)
    [s.l.] : Nature Publishing Group
    Nature 347 (1990), S. 465-467 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Polymetallic mineralization containing uranium, copper, bis-muth, cobalt and nickel (with arsenic and antimony) occurs at Needle's Eye (National Grid reference NX 915 562) on the north coast of the Solway Firth (Fig. 1). It lies largely in the contact zone of the late Caledonian Criffel ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/347465a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Hydrogeochemical modelling of an active system of uranium fixation by organic soils and sediments (Needle's Eye, Scotland) (1993)
    Springer
    Mineralium deposita 28 (1993), S. 66-76 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Uranium accumulation in organic-rich sediments can be closely modelled by assuming that the dominant effect of the uranium-organic matter interaction is the direct or indirect reduction of uranyl compounds to form U(IV) minerals, especially uraninite-pitchblende. Application of this model to the Needle's Eye (Scotland) site where uranium is actively accumulating in Quaternary sediments demonstrates that uranium accumulation is both effective and rapid in environments involving shallow, organic-rich, reducing horizons. The period of uranium deposit formation at Needle's Eye is estimated to be as short as 5000 years. The transport of uranium to the site of deposition by oxidizing groundwaters and the channelling of these oxidizing uraniferous groundwaters are identified as important factors involved in the rapid accumulation of uranium. The regional hydrogeological model indicates that a fault in the area appears to act as a hydraulic screen for the uraniferous groundwaters. On one side of the fault the Quaternary sediments are well drained whilst on the other the flow of groundwater seeps out creating a major flux just at the bottom of the organic-rich layers. The local hydrogeological model shows that the groundwater flow is vertical in this area. A third significant factor in the development of these uranium accumulations is the presence of a significant nearby source of leachable primary uranium. In the case of the Needle's Eye site this is in the form of some thirty 185 ±20 Ma, pitchblende-bearing veins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00199011
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...