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  • Institute of Physics  (23)
  • American Geophysical Union  (20)
  • Geological Society of London  (16)
  • American Association of Petroleum Geologists (AAPG)
  • American Institute of Physics (AIP)
  • Amsterdam : Elsevier
  • Geological Society of America (GSA)
  • International Union of Crystallography (IUCr)
  • 2020-2022  (10)
  • 2010-2014  (42)
  • 1960-1964  (13)
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  • 1
    Digitale Medien
    Digitale Medien
    The crystal and molecular structure of dichlorodi-(o-phenylenebisdimethylarsine)platinum(II) (1964)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 17 (1964), S. 1517-1522 
    Details
    ISSN: 0001-5520
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0365110X64003796
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  • 2
    Digitale Medien
    Digitale Medien
    The crystal and molecular structure of diiododi-(o-phenylenebisdimethylarsine)nickel(II) (1964)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 17 (1964), S. 592-596 
    Details
    ISSN: 0001-5520
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0365110X64001347
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  • 3
    Digitale Medien
    Digitale Medien
    The crystal structure of tetraethylammonium tetrabromo-μμ'-dibromoplatinum(II) (1964)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 17 (1964), S. 587-591 
    Details
    ISSN: 0001-5520
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0365110X64004200
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  • 4
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    Evolution of the west Greenland margin: offshore thermostratigraphic data and modelling (2012)
    Geological Society of London
    Details
    Publikationsdatum: 2012-09-01
    Beschreibung: The origin and age of topography along the west Greenland margin is a matter of continued debate. Evidence for tectonically driven Neogene uplift has been argued from interpretations of offshore seismic surveys, onshore fission-track data and inferred episodes of cooling. Here, analysis of seismic reflection profiles and 1D modelling of exploration wells along the Greenland margin of Davis Strait demonstrate that the data are consistent with a model of ancient continental topography affected by late Cretaceous–early Palaeocene rifting followed by thermal subsidence where offshore Neogene tectonic uplift is not required. This interpretation for the offshore evolution of the west Greenland margin has implications for the adjacent onshore evolution and for other continental margins developed throughout the Atlantic–Arctic rift system.
    Print ISSN: 0016-7649
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of London
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  • 5
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    Research Update: A hafnium-based metal-organic framework as a catalyst for regioselective ring-opening of epoxides with a mild hydride source (2014)
    American Institute of Physics (AIP)
    Details
    Publikationsdatum: 2014-10-28
    Beschreibung: Reaction of styrene oxide with sodium cyanoborohydride and a catalytic amount of Hf-NU-1000 yields the anti-Markovnikov product, 2-phenylethanol, with over 98% regioselectivity. On the other hand, propylene oxide is ring opened in a Markovnikov fashion to form 2-propanol with 95% regioselectivity. Both styrene oxide and propylene oxide failed to react with sodium cyanoborohydride without the addition of Hf-NU-1000 indicative of the crucial role of Hf-NU-1000 as a catalyst in this reaction. To the best of our knowledge, this is the first report of the use of a metal-organic framework material as a catalyst for ring-opening of epoxides with hydrides.
    Digitale ISSN: 2166-532X
    Thema: Maschinenbau
    Publiziert von American Institute of Physics (AIP)
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  • 6
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    Geochemical evolution of Dalradian metavolcanic rocks: implications for the break-up of the Rodinia supercontinent (2011)
    Geological Society of London
    Details
    Publikationsdatum: 2011-09-01
    Beschreibung: Neoproterozoic basaltic magmatism in the Dalradian Supergroup of Scotland and Ireland was associated with the break-up of the Rodinia supercontinent. Magmas were erupted in rift-related basins along a strike length of at least 700 km and during a time period of c. 80 Ma. New major and trace element analyses of metabasalts from several formations are presented to trace the variations in magma compositions in time and space. The primary magmas resulted from variable degrees of mixing of melts derived from mantle sources similar to those of normal and enriched mid-ocean ridge basalts; some younger lavas also show evidence of contamination with continental crust. In contrast to speculations about magmatism elsewhere in Rodinia, the evidence here suggests that there was no involvement of a mantle plume in basalt generation. For example, the Scottish promontory of Laurentia drifted rapidly southwards through c. 25{degrees} over the duration of the magmatism, with no evidence of significant elevation above sea level, as might be expected from involvement of a plume. Generation of the primary magmas might have taken place predominantly through decompression melting in depleted upper mantle containing enriched streaks and blobs. Both the Dalradian lithostratigraphy and the metabasaltic compositions are consistent with extreme lithospheric stretching and possibly rupture during the earliest phase of magmatism, whereas generation of later magmatism appears to have been associated with major fault systems, possibly on a foundering continental margin. Supplementary materialChemical analyses of Dalradian metavolcanic rocks (major elements recalculated to 100%, anhydrous) are available at www.geolsoc.org.uk/SUP18468.
    Print ISSN: 0016-7649
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of London
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  • 7
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    Geochemical evolution of Dalradian metavolcanic rocks: implications for the break-up of the Rodinia supercontinent (2011)
    Geological Society of London
    Details
    Publikationsdatum: 2011-08-31
    Beschreibung: : Neoproterozoic basaltic magmatism in the Dalradian Supergroup of Scotland and Ireland was associated with the break-up of the Rodinia supercontinent. Magmas were erupted in rift-related basins along a strike length of at least 700 km and during a time period of c . 80 Ma. New major and trace element analyses of metabasalts from several formations are presented to trace the variations in magma compositions in time and space. The primary magmas resulted from variable degrees of mixing of melts derived from mantle sources similar to those of normal and enriched mid-ocean ridge basalts; some younger lavas also show evidence of contamination with continental crust. In contrast to speculations about magmatism elsewhere in Rodinia, the evidence here suggests that there was no involvement of a mantle plume in basalt generation. For example, the Scottish promontory of Laurentia drifted rapidly southwards through c . 25° over the duration of the magmatism, with no evidence of significant elevation above sea level, as might be expected from involvement of a plume. Generation of the primary magmas might have taken place predominantly through decompression melting in depleted upper mantle containing enriched streaks and blobs. Both the Dalradian lithostratigraphy and the metabasaltic compositions are consistent with extreme lithospheric stretching and possibly rupture during the earliest phase of magmatism, whereas generation of later magmatism appears to have been associated with major fault systems, possibly on a foundering continental margin. Supplementary material: Chemical analyses of Dalradian metavolcanic rocks (major elements recalculated to 100%, anhydrous) are available at www.geolsoc.org.uk/SUP18468 .
    Print ISSN: 0016-7649
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of London
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  • 8
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    Seismological evidence for a fossil subduction zone in the East Greenland Caledonides (2014)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publikationsdatum: 2014-03-15
    Beschreibung: The postorogenic collapse of the early Paleozoic Caledonian orogeny is well documented; however, several different plate tectonic models exist for the convergent phase involving closure of the Iapetus Ocean and the collision of Laurentia and Baltica. Receiver function analysis of 11 broadband seismometers along a 270 km transect in the East Greenland Caledonides reveals the existence of an east-dipping high velocity slab. Numerical modeling demonstrates that relict subducted and eclogitized crust is a plausible explanation. Thus, eastward subduction preceded subsequent west-dipping subduction during the formation of the East Greenland and Scandinavian Caledonides. This is a key constraint for understanding the Caledonian and continental margin evolution in the North Atlantic realm.
    Print ISSN: 0091-7613
    Digitale ISSN: 1943-2682
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of America (GSA)
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  • 9
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    Evaluation of environmental impact on historical stone masonry through on-site monitoring appraisal (2013)
    Geological Society of London
    Details
    Publikationsdatum: 2013-11-26
    Beschreibung: This paper presents the design and application of an environmental monitoring system on the historical site of Odda’s Chapel in Deerhurst, Gloucestershire, UK, and the determination of hygroscopic behaviour of the original building materials to obtain long-term moisture content variation. The monitoring system provides a comprehensive profile of hygrothermal conditions in the walls at the locations where moisture conditions are potentially causing decay and damage. The system makes use of temperature and relative humidity sensing technology placed on the wall construction, providing continuous data including rainfall, wind-driven rain and runoff rain measurements. The relative merits and results of the designed system are evaluated and discussed, as well as the implications of its application in the conservation of historical structures. The environmental monitoring results show general deterioration in the shell of the building. Internal wall surface measurements are essential for the documentation of wall interior response and should be conducted across the wall section at several locations. The fact that 91% of in-wall recorded relative humidity (RH) values are greater than 75% RH throughout the monitoring period demonstrates the need for measures to conserve this historical stone masonry.
    Print ISSN: 1470-9236
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of London
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  • 10
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    Real-time x-ray studies of crystal growth modes during metal-organic vapor phase epitaxy of GaN on c- and m-plane single crystals (2014)
    American Institute of Physics (AIP)
    Details
    Publikationsdatum: 2014-08-05
    Beschreibung: Non-polar orientations of III-nitride semiconductors have attracted significant interest due to their potential application in optoelectronic devices with enhanced efficiency. Using in situ surface x-ray scattering during metal-organic vapor phase epitaxy (MOVPE) of GaN on non-polar (m-plane) and polar (c-plane) orientations of single crystal substrates, we have observed the homoepitaxial growth modes as a function of temperature and growth rate. On the m-plane surface, we observe all three growth modes (step-flow, layer-by-layer, and three-dimensional) as conditions are varied. In contrast, the +c-plane surface exhibits a direct crossover between step-flow and 3D growth, with no layer-by-layer regime. The apparent activation energy of 2.8 ± 0.2 eV observed for the growth rate at the layer-by-layer to step-flow boundary on the m-plane surface is consistent with those observed for MOVPE growth of other III-V compounds, indicating a large critical nucleus size for islands.
    Print ISSN: 0003-6951
    Digitale ISSN: 1077-3118
    Thema: Physik
    Publiziert von American Institute of Physics (AIP)
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