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  • 1
    Electronic Resource
    Electronic Resource
    Origin of granitoid rocks (reply) (1983)
    [s.l.] : Nature Publishing Group
    Nature 305 (1983), S. 73-73 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PANKHURST REPLIES-We thank Moorbath for his comments on the introduction to our article1 on the isotope geochemistry of the Etive Igneous Complex and apologize for any unintended misrepresentation of his view caused by a poor choice of words. Our purpose was simply to set the scene by referring to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/305073b0
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  • 2
    Electronic Resource
    Electronic Resource
    Sr, O, and Pb isotope evidence for origin and evolution of Etive Igneous Complex, Scotland (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 492-497 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A multi-isotope approach has been applied to the origin of one of the largest and latest Newer Granite complexes of the Scottish Caledonides. Contributions from both mantle and unexposed late Proterozoic lower continental crust are recognized, indicating that granite magmatism is a mechanism for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303492a0
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  • 3
    Electronic Resource
    Electronic Resource
    Isotopic evidence for the provenance of some Caledonian granites (1980)
    [s.l.] : Nature Publishing Group
    Nature 287 (1980), S. 279-284 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A combined Nd- and Sr-isotope study of Caledonian granites in Scotland and northern England demonstrates the importance of continental crust in their petrogenesis and places limits on the involvement of contemporary mantle-derived ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/287279a0
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  • 4
    Electronic Resource
    Electronic Resource
    Key Generation by Computer (1970)
    [s.l.] : Nature Publishing Group
    Nature 227 (1970), S. 1269-1270 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Keys of the traditional kind are often not available for specialists or students in the less popular branches of biology. There are shortcomings in such keys, even when they are available: (a) the key may not entirely agree with the corresponding description, because of the complexity of the task ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2271269a0
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  • 5
    Electronic Resource
    Electronic Resource
    Early Archaean Age for the Isua Iron Formation, West Greenland (1973)
    [s.l.] : Nature Publishing Group
    Nature 245 (1973), S. 138-139 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The age relations of the gneiss and the iron formation are not yet clear from field evidence, because intense deformation has resulted in structurally conformable contacts. Here we report a Pb-Pb isochron age for several typical banded ironstone samples consisting of alternating, but deformed, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/245138a0
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  • 6
    Electronic Resource
    Electronic Resource
    Strontium Isotopes and Rare Earth Elements in Basalts from the Heimaey and Surtsey Volcanic Eruptions (1973)
    [s.l.] : Nature Publishing Group
    Nature 243 (1973), S. 213-214 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Vestmannaeyjar are almost exclusively made up of basalt lavas and tuffs of mild alkaline character, like the Surtsey lavas and the Helgafell lava2. Basalts from the Vestmannaeyjar, together with basalts from the Snaefellsnes area of western Iceland (Fig. 1), are the only examples of postglacial ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/243213a0
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  • 7
    Electronic Resource
    Electronic Resource
    A 4.3 Aeon Pre-Imbrium Event (1972)
    [s.l.] : Nature Publishing Group
    Nature 237 (1972), S. 446-447 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Much discussion of lunar basalt genesis is centred on Rb-Sr isotope systematics. In particular, it is often said that most whole rocks have model ages, relative to the initial 87Sr/86Sr ratio of basaltic achondrites (BABI=0.69898), of about 4.6 aeon. The best fit isochron to eleven mare-type ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/237446a0
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  • 8
    Electronic Resource
    Electronic Resource
    Open system crystal fractionation and incompatible element variation in basalts (1977)
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 36-38 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I suggest that three rare earth elements (Ce, Sm and Yb) are especially useful for this purpose. In most solid-liquid equilibria relevant to basalt genesis they range from incompatible to slightly compatible with increasing atomic number. Their relative crystal-liquid partition coefficients are ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/268036a0
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  • 9
    Electronic Resource
    Electronic Resource
    Further rubidium–strontium age and isotope evidence for the nature of the late Archaean plutonic event in West Greenland (1976)
    [s.l.] : Nature Publishing Group
    Nature 262 (1976), S. 124-126 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A large collection of Nuk gneisses was made by us in 1973 from the area between Buksefjord and Sermilik (Fig. 1, also Table 1, Numbers 4, 5, 6). Some of these samples are from localities where Chadwick et al.7 believed they had unequivocal evidence for remobilisation of Amitsoq gneiss. A more ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/262124a0
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  • 10
    Electronic Resource
    Electronic Resource
    Geochemistry and petrogenesis of the early Tertiary lava pile of the Isle of Mull, Scotland (1978)
    Springer
    Contributions to mineralogy and petrology 66 (1978), S. 415-427 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Major and trace element analyses and strontium isotope ratios are presented for twenty-four samples of lavas and plugs from the early Tertiary lava pile in Mull. The samples were selected on the basis of petrographic freshness from a large collection from outside the hydrothermally altered “zone of pneumatolysis” which occupies the central region of the volcanic complex. Most of the analyses yield normative hypersthene and we argue that these are essentially unaltered magmatic compositions. The analytical data indicate that the samples may be divided into three groups on the basis of major element chemistry, initial 87Sr/86Sr ratios and correlations between lithophile element contents. Group I comprises an alkaline series (basalt-hawaiite-mugearite) with extremely low initial 87Sr/86Sr ratios (≦0.7030) and generally low lithophile element contents. Apart from their alkalinity and high Sr and Zr contents these samples have affinities with abyssal tholeiites. Group II contains hypersthene normative basalts with more tholeiitic characteristics but (as in the case of the Skye Main Lava Series) the more evolved rocks are trachytes. This group is characterized by more normal levels of lithophile element concentrations and relatively high initial 87Sr/86Sr ratios of about 0.7055. Group III is less clearly defined and contains basalts that are generally sparsely olivine-phyric and in most chemical respects fall between Group I and Group II-including initial 87Sr/86Sr ratios (0.7033 to 0.7043). They may represent mixtures of Group I and Group II type sources or magmas. Groups I and II appear to be similar, respectively, to the relatively sodic iron-rich and the relatively potassic ironpoor silica enrichment trends distinguished in the Skye Main Lava Series. In the Group I magma series the behaviour of Y and Sr relative to other incompatible elements can only be explained by differential partial melting of a deep garnet-lherzolite mantle source. Fractional crystallization has undoubtedly occurred at some stage during the ascent of these magmas from the mantle, as indicated by the behaviour of Ni and Cr, but has not been a major factor in the production of evolved magma compositions. The Group II magmas appear to have originated from a source more enriched in lithophile elements, and a relatively shallow (〈 50 km) plagioclase-lherzolite mantle source is suggested for these magmas because they have Sr/Ba ratios between one and two orders of magnitude lower than those characteristic of Group I. Rb-Sr systematics suggest that the vertical heterogeneity of the mantle which was largely responsible for the chemical differences between these three groups may have existed for a very long time prior to Tertiary magmatism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403427
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