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  • 1985-1989  (3)
  • 1987  (3)
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  • 1985-1989  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Banding structures in induced morphology crystal aggregates of CaCO3 (1987)
    Springer
    Journal of materials science 22 (1987), S. 3095-3102 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Average radial growth rates in induced morphology crystal aggregates (IMCA) of CaCO3 with sheaf-of-wheat morphologies range between 33.4 and 111 μm/day. The growth process has not been found to be diffusion-controlled. Banding structures appearing in this kind of IMCA are explained just like rhythmic structures similar in origin to Liesegang rings, but the banding law in this case being modified by the matrix effect. Genetical models explaining the formation of ribbons with different particle density are also proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161169
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Facies control of strata-bound ore deposits in carbonate rocks: The F-(Pb-Zn) deposits in the Alpine Triassic of the Alpujárrides, southern Spain (1987)
    Springer
    Mineralium deposita 22 (1987), S. 216-226 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The strata-bound fluorite-(barite-)Pb-Zn ore deposits occurring within the more than 3,000 m thick Alpujárride Carbonate Formation of the Betic Cordillera, southern Spain, are linked to two defined stratigraphic positions (within the Anisian and at the Ladinian-Carnian transition) and to definite sedimentary contexts. These are highly restricted lagoons isolated from the open sea by calcarenitic barriers with noticeable development of algal mats in their inner margins. Preevaporitic deposition conditions are usually recognized. The ore-bearing horizons are located either at the transition from evaporitic to normal marine deposition (as in the case of the Anisian ore-bearing horizon) or at the transition from normal marine to evaporite deposition (as in the case of the uppermost Ladinian to lowermost Carnian ore-bearing horizon). These vertical facies changes correspond also to the transitions from predominantly terrigenous (continental and/or coastal) sedimentation to marine carbonate sedimentation (Anisian ore deposits) and vice versa (upper Ladinian-lower Carnian). It is proposed that the ore deposits in the Triassic Alpujárride Formation are controlled by certain facies associations in the lagoonal environment. The depositional environment determines the hydrologic regimes responsible for early diagenetic formation of fluorite and of the related ore minerals in a way similar to that of early-diagenetic dolomite. This hypothesis is consistent with field and petrographic observations and with available geochemical and itotopic data reported in other works. The present investigation intends to underline the role played by surface-linked ore formation processes, i.e., by ore-forming processes essentially linked to the environments in which sedimentation and early diagenesis takes place, in the genesis of numerous strata-bound Zn-Pb-(F-Ba) ore deposits in carbonate rocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206613
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Description of a case of rhinosporidiosis in Spain (1987)
    Springer
    Mycopathologia 97 (1987), S. 9-16 
    Details
    ISSN: 1573-0832
    Keywords: rhinosporidiosis ; fluorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Rhinosporidiosis is reviewed, and the first autochthonous case in Spain is presented (site: in the nasal cavity of a 19-year-old male from a rural background). Diagnosis was established morphologically after eliminating the possibilities of Cryptococcus neoformans, Coccidioides immitis, and Chrysosporium crescens. Clinico-pathological features are described. Preparations were stained with hematoxylin-eosin, PAS, and methenamine silver, and studied for fluorescence. Certain aspects of the epidemiology and diagnosis are commented upon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00437325
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    Paper (German National Licenses)
    Fulltext
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