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  • 1
    Electronic Resource
    Electronic Resource
    Seismic evidence for Mesozoic sedimentary troughs on the Hebridean continental margin (1978)
    [s.l.] : Nature Publishing Group
    Nature 276 (1978), S. 420-420 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] JONES'S interpretation of seismic refraction lines on the NW British continental shelf1 provides welcome corroboration of the Mesozoic sedimentary basin between the Flannan Isles and Lewis first postulated by Bullerwell (see refs 2-4). As we have already suggested that the Rockall Trough developed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/276420a0
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  • 2
    Electronic Resource
    Electronic Resource
    Formation of fossil hydrothermal chimneys and mounds from Silvermines, Ireland (1983)
    [s.l.] : Nature Publishing Group
    Nature 306 (1983), S. 545-550 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sulphur isotope analyses reveal that the fossil hydrothermal pyrite mound and tubes at Silvermines were produced by the reaction of hydrothermal Fe(II) with bacteriogenically-reduced sulphur species (δ34S range:−18.4 to −42.5%). This took place in a brine pool ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/306545a0
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  • 3
    Electronic Resource
    Electronic Resource
    Origin of a giant orebody at Navan, Ireland (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 223-226 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Generalized cross-section of the Navan orebody showing the lens structure referred to in the text (after Andrew and Ashton29). Inset: map of Ireland showing location of Navan. Various genetic models have been suggested for the origin of SEDEX base-metal deposits: (1) basin brine ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327223a0
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  • 4
    Electronic Resource
    Electronic Resource
    Submarine hot springs and the origin of life (1988)
    [s.l.] : Nature Publishing Group
    Nature 336 (1988), S. 117-117 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIRá€"Miller and Bada1 argue against the idea2 that hydrothermal vents at ocean-ridge crests would have provided suitable environments for life to originate. To their arguments one can add the lack of long-term stable microenvironments that would presumably have been needed for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/336117a0
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  • 5
    Electronic Resource
    Electronic Resource
    Pyrite and the origin of life (1990)
    [s.l.] : Nature Publishing Group
    Nature 344 (1990), S. 387-387 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/344387b0
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  • 6
    Electronic Resource
    Electronic Resource
    Tectonic Comparison of North Atlantic and Middle East Rifting (1969)
    [s.l.] : Nature Publishing Group
    Nature 222 (1969), S. 1056-1057 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We wish to compare the fracture patterns related to the formation of the Red Sea Rift with those related to the opening of the Labrador-Biscay Rift described by Webb2. In doing so, striking similarities become apparent which may have general significance in the study of rift zones. Webb2, using ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2221056a0
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  • 7
    Electronic Resource
    Electronic Resource
    The genesis of sediment-hosted, exhalative zinc + lead deposits (1981)
    Springer
    Mineralium deposita 16 (1981), S. 113-127 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Large sediment-hosted lead+zinc deposits like Mount Isa, McArthur River, Navan, Rammelsberg and Sullivan form a distinctive group characterised by stratiform, syngenetic sulphide ores that formed in local basins on the sea floor as a result of protracted hydrothermal activity accompanying continental rifting. Generally there is a development of a sedimentary pre-ore phase mineralization often featuring manganese followed by zinc±lead, iron and chert. Lower main phase zinc+lead lenses are usually almost devoid of copper but Cu tenors increase toward the middle or top of the ore sequences. Hanging wall trace element haloes are common. These characteristics are accounted for by deriving the ore solutions from subsurface convective circulation of modified highly saline seawater. The circulation is initiated during rifting and driven by a high geothermal gradient. As a result of continued extensional strain and cooling of the rock column the brittle-to-ductile transition zone is depressed and the circulation penetrates to greater depth with time. Of the ore metals the downward-penetrating convection fluids first leach and transport zinc and lead, but with increasing temperature are later able to leach and transport some copper. Unless convective circulation ceases the metal sequence generally reverses as the cooling phase sets in. The minimum distance separating major coeval orebodies of this type is 18 km which is a function of the size of the convective systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206458
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  • 8
    Electronic Resource
    Electronic Resource
    Sulphur isotopic investigation of vein lead-zinc mineralization at Tyndrum, Scotland (1983)
    Springer
    Mineralium deposita 18 (1983), S. 477-485 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Tyndrum Pb+Zn veins, hosted by late Proterozoic quartzites, were probably generated in the Tournaisian (360 Ma). By determination of sulphur isotopic ratios of vein minerals three aspects of the Tyndrum mineralization were addressed, (i) sulphate sulphur sources; (ii) reduced sulphur source; (iii) isotopic equilibrium in the vein system including geothermometry. Twelve galenas have δ34S values ranging from +3.55 ‰ to +6.38 ‰ (this excludes one value of +11.21 ‰ from a large but nearly barren quartz vein). Other sulphides are enriched or depleted in 34S in the sense expected for isotopic equilibrium although there is no evidence for isotopic equilibrium between the vein minerals. The sulphide sulphur source was probably in the Dalradian metasediments where disseminated pyrite averages +6 ‰. Baryte had δ34S values averaging 14 ‰ and was therefore not in isotopic equilibrium with sulphides: a continental groundwater source is most likely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204492
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  • 9
    Electronic Resource
    Electronic Resource
    Sulphur isotopic investigation of lower carboniferous vein deposits of the British Isles (1989)
    Springer
    Mineralium deposita 24 (1989), S. 148-153 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Similar characteristics and age data suggest that the Pb + Zn vein deposits hosted by Lower Palaeozoic and Vendian strata of the British Isles form a genetically related group, coeval with the Lower Carboniferous carbonatehosted base-metal deposits of Ireland. Sulphur isotopic data demonstrate that there were separate sulphide and sulphate sulphur sources for the vein minerals. δ34S values from minerals in individual vein systems are consistent but there is a large variation between deposits, revealing distinctive local sulphur sources. The data suggests that sulphide sulphur (total range of values of δ34SH2S of -6.5 to 18.62‰) was derived from the underlying strata while the sulphate (baryte) sulphur source (δ34Sbaryte mainly in the range 12 to 24‰) was groundwater or surface water that mixed with rising hydrothermal fluids in the upper reaches of the veins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206319
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  • 10
    Electronic Resource
    Electronic Resource
    Reply to A. M. Evans' discussion: Mineralization in Ireland — Some unanswered questions (1982)
    Springer
    Mineralium deposita 17 (1982), S. 439-441 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204472
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