GLORIA — GEOMAR Library Ocean Research Information Access

1

Digitale Medien

40 Ar/ 39 Ar dating of the KBS Tuff in Koobi Fora Formation, East Rudolf, Kenya (1976)

Fitch, F. J. ; Hooker, P. J. ; Miller, J. A.

[s.l.] : Nature Publishing Group

Nature 263 (1976), S. 740-744

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/263740a0

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

2

Digitale Medien

K–Ar dating of the Pleistocene fossil hominid site at Chesowanja, North Kenya (1979)

Hooker, P. J. ; Miller, J. A.

[s.l.] : Nature Publishing Group

Nature 282 (1979), S. 710-712

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/282710a0

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

3

Digitale Medien

Microbial influence on the sorption of137Cs onto materials relevant to the geological disposal of radioactive waste (1991)

West, J. M. ; Haigh, D. G. ; Hooker, P. J. ; [weitere]

Springer

Cellular and molecular life sciences 47 (1991), S. 549-552

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1420-9071

Schlagwort(e): Microbiology ; radioactive waste ; geology ; radionuclide sorption ; 137Cs

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01949876

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

4

Digitale Medien

Helium isotopes in North Sea gas fields and the Rhine rift (1985)

Hooker, P. J. ; O'Nions, R. K. ; Oxburgh, E. R.

[s.l.] : Nature Publishing Group

Nature 318 (1985), S. 273-275

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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, ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/318273a0

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

5

Digitale Medien

Uranium-mineralized micro-organisms associated with uraniferous hydrocarbons in southwest Scotland (1990)

Milodowski, A. E. ; West, J. M. ; Pearce, J. M. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 347 (1990), S. 465-467

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/347465a0

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

6

Digitale Medien

Hydrogeochemical modelling of an active system of uranium fixation by organic soils and sediments (Needle's Eye, Scotland) (1993)

Jamet, P. ; Hooker, P. J. ; Schmitt, J. M. ; [weitere]

Springer

Mineralium deposita 28 (1993), S. 66-76

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1866

Quelle: Springer Online Journal Archives 1860-2000

Thema: Geologie und Paläontologie

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00199011

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext