ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
Filter
  • Articles  (20)
Collection
Source
Publisher
Years
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Rubidium Depletion in Feldspars (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 202-203 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This coherence is shown in Fig. 1. The dashed lines on the diagram indicate the limits of scatter of Ahrens s original data, and most subsequent analyses fall within these limits, which are taken to indicate the limits of normal potassium/rubidium ratios. In view of the close coherence of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/182202a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Thorium, Uranium and Potassium Concentrations in Hawaiian Lavas (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 254-256 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] KNOWLEDGE of the uranium, thorium and potassium concentrations in basaltic rocks is of importance in geochemical and geophysical investigations of the Earth's crust and upper mantle. The Hawaiian Islands, situated in an oceanic (non-orogenic) region, are built mainly of basaltic lavas, which are ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201254a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Radioactive Elements in the Continental Crust (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 479-480 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. ESTIMATES OF THORIUM, URANIUM AND POTASSIUM ABUNDANCES IN REGIONS OF THE CONTINENTAL CRUST Th U K (p.p.m.) (p.p.m.) (per cent) Ref. (reochemical estimates 11-4±2 3-0±0-6 Adams et al.12; geochemical balance; abundance in crust exposed to weather ing 10-0 2-8 2-6 Heier and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/208479b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    On the occurrence of eclogite in Western Norway (1970)
    Springer
    Contributions to mineralogy and petrology 26 (1970), S. 12-19 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Recent experimental data show that eclogites may form in the crust under conditions where total pressure exceeds water pressure. The regional distribution of eclogites in Western Norway and their association with crustal rocks makes their formation in the crust the most attractive hypothesis. Before a mantle origin should be assigned to any rock within this eclogite and garnet peridotite area it should be demonstrated that their country rocks are in a metamorphic state incompatible with the load pressures required for eclogite stability. Criteria for ascertaining eclogite formation in the crust are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373337
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Parageneses of garnet in granulite-facies rocks, Lofoten-Vesteraalen, Norway (1969)
    Springer
    Contributions to mineralogy and petrology 23 (1969), S. 89-116 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Garnet occurs widely as a secondary mineral in the granulite-facies rocks of the Lofoten-Vesteraalen islands of North Norway. The garnet-forming reactions may be inferred from the resulting textures and are interpreted as being retrograde reactions. Microprobe analyses show that garnets with high proportions of CaO and MgO occur in coronas around olivine grains in anorthosites, whereas the most iron-rich garnets formed by reaction between plagioclase and the very iron-rich pyroxenes of some monzonitic (mangeritic) rocks. Garnets ranging in composition between these extremes formed by reactions involving biotite, plagioclase and magnetite. Textural features indicate that these reactions have been induced by oxidation of the biotite; the liberated water has converted the pyroxenes to amphibole. The net effect of the reactions is to transform the granulite-facies assemblages to amphibolite-facies assemblages. The secondary garnet is nearly ubiquitous in the granulites of the outer Lofoten islands, which may show no other signs of retrogression. On Langöy in Vesteraalen garnet occurs only within a zone of strongly retrograded gneisses. Differences in bulk composition do not satisfactorily explain the distribution of secondary garnet. This distribution, and the observed oxidation textures, imply widespread penetration of the Lofoten granulites by a transient oxidizing fluid. On Langöy these fluids apparently affected only the narrow retrograded zone. The model suggests that the 1700 to 1800 m.y. Rb/Sr date obtained by Heier and Compston (1969) for the Lofoten granulites represents the time of oxidation, whereas the 2800 m.y. date for the Langöy granulites represents the original granulite-facies metamorphism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00375172
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Petrogenesis of eclogites in high grade metamorphic gneisses, exemplified by the Hareidland eclogite, western Norway (1972)
    Springer
    Contributions to mineralogy and petrology 36 (1972), S. 73-94 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The eclogite on Hareidland, western Norway, is among the largest eclogite bodies yet described. It occurs as a sheet-like body folded together with the surrounding metasedimentary gneisses of the basal gneiss complex of western Norway. The maximum surface extension of the body is about 6 km with the width varying between 0.2 and 1.5 km. Relations between bulk chemical variation and mineralogical variation suggest that the mafic rock now found as eclogite probably crystallized as a gabbroic rock. Field and mineralogical evidence suggests simultaneous later metamorphism of the gabbro and the surrounding gneisses at a temperature and load pressure near 625±30°C and 14 kb. The temperature estimate is based on a “thermometer” which uses the distribution coefficient, $${\text{K}}_{{\text{ga}} - {\text{cpx}}}^{{\text{Fe}}^{{\text{2 + }}} - {\text{Mg}}}$$ . Whole rock Rb-Sr dating indicates about 1700 m.y. as the age of the metamorphism of the gneisses and therefore also the age of the eclogite. The Sr87/Sr86-ratios of a few biotite and amphibole-rich samples suggest a later partial Rb-Sr homogenization (Caledonian?) of the gneisses on Hareidland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372836
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Rubidium/Strontium and Strontium-87/Strontium-86 Ratios in Deep Crustal Material (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 477-478 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many rocks with low 87Sr/86Sr ratios concentrate elements considered by geologists, geochemists, and geo-physicists to be strongly concentrated in the crust, and depleted in the mantle. A derivation of such rocks from the mantle would be contrary to many of our general ideas about the Earth, and of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/202477a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Radioelement variation in the Levang granite-gneiss, Bamble region, south Norway (1974)
    Springer
    Contributions to mineralogy and petrology 48 (1974), S. 171-177 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract An investigation of the distribution of thorium, uranium and potassium across the Levang granite-gneiss shows a significant increase in thorium and uranium from north to south. Although the mean thorium and uranium concentrations are comparable to average granitic values quoted in the literature, potassium is lower. The relative enrichment of thorium and uranium thus appears to be related to Sveconorwegian metamorphism recorded in the rocks of the adjacent Portør Peninsula to the south. The Levang granite-gneiss has recorded only the Svecofennian metamorphic event of approximately 1616 m.y.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383354
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    facet.materialart.
    Unknown
    Phase Relations of Potash Feldspar in Metamorphism (1957)
    University of Chicago Press
    Details
    Publication Date: 1957-09-01
    Print ISSN: 0022-1376
    Electronic ISSN: 1537-5269
    Topics: Geosciences
    Published by University of Chicago Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Radioactive Elements in the Continental Crust (1965)
    Springer Nature
    Details
    Publication Date: 1965-10-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...