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
  • 1
    Electronic Resource
    Electronic Resource
    Thin-skinned thrust mineralization in the Brasília fold belt: the example of the old Luziânia gold deposit (1992)
    Springer
    Mineralium deposita 27 (1992), S. 293-303 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Luziânia gold deposits in southern Goiás lie within the Late Proterozoic Brasília fold belt. The rocks that host the gold mineralization are a monotonous series of hydrothermally altered phyllites that have been subject to low grade regional metamorphism. The major controls on the gold mineralization are northeast trending and gently northwest dipping ductile-brittle, dextral-reverse shear zones associated with regional thin-skinned thrusting of the Canastra Group. From a preliminary fluid inclusion study it is deduced that low salinity, ⩽ 7 eq. wt% NaCl, moderately dense, H2O-CO2 ± CH4 ore fluids deposited gold at temperatures of 300 ± 75°C and pressures of 1.5 to 3 kb in the filling stage of the vein formation. Post-filling stage gold deposition probably occured by mixing of fluids at higher crustal levels (1.5–2 kb). During thrusting, prograde metamorphism released pore water which penetrated along thrust planes that acted as high permeability zones for the ponding and release, by hydraulic fracturing, of overpressured fluids. Later in the tectonic evolution and at shallower crustal levels, there was likely an incursion of near suface water into the fault zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193400
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Determination of the inherent reflecting range of a single crystal in diffractometry (1963)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 16 (1963), S. 773-776 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X63003443
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Eastern Greenland basalts and their supposed plume origin (1976)
    [s.l.] : Nature Publishing Group
    Nature 260 (1976), S. 232-234 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The main outcrop of lavas is on the Blossville coast in the 450 km between Kangerdlugssuaq and Scoresby Sund, though scattered, less well known outcrops are found along the 800 km of coast between Kialineq and Shannon Isle. The lavas were extruded during an early stage of the opening of the North ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/260232b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Potassium–Argon Ages of some Aberdeenshire Granites and Gabbros (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 1287-1288 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The potassium-argon ages for three of the basic masses show a spread from 460 to 498 million years. If the gabbros were originally intruded as a single sheet, then the spread of ages can be regarded as due to varying degrees of overprinting caused by metamorphic effects associated with the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2071287a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The Effect of Grinding the Soil on Its Reaction as Determined by the Veitch Method. (1915)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 7 (1915), S. 776-777 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50081a014
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The Determination of Sulfates in Soils. (1915)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 7 (1915), S. 686-687 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50080a018
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Structure of a cyclopropachromene (1994)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 50 (1994), S. 424-425 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270193009436
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Textural evolution of the rapakivi granites, south Greenland —Sr, O and H isotopic investigations (1991)
    Springer
    Contributions to mineralogy and petrology 107 (1991), S. 459-471 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The development of rapakivi texture in feldspars from the Ketilidian granitoids of south Greenland has been investigated using Sr, O and H isotopes. A low temperature signature is found in the Sr and O data which seemingly contradicts some textural features that point to a magmatic origin of the plagioclase mantles around the K-feldspar ovoids. An origin for these mantles involving exsolution from an original alkali feldspar solid solution is proposed, which involves growth of mantles over a range of conditions determined by the mobility of the exsolving sodic feldspar. This mobility may be enhanced at high temperatures in the presence of melts or increased fluid pressures and at lower temperatures by the processes responsible for the transformation of K-feldspar to microcline. Rapakivi granites with both white and dark green feldspar occur in south Greenland but show no major isotopic differences, although the dark alkali feldspars contain significantly more fluid. Equivalent fluids in the white alkali feldspars may have escaped during plagioclase exsolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310680
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Major element composition of the Loch Coire migmatite complex, Sutherland, Scotland (1966)
    Springer
    Contributions to mineralogy and petrology 14 (1966), S. 1-26 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Analyses of Moine metasediments and migmatites in the Loch Coire area of northern Scotland are used to delineate the fields of composition of the major rock groups. An assessment is made of the relative merits of the hypotheses of isochemical metamorphism and metasomatism in the genesis of the migmatites. Within the migmatites the Fe″/Fe‴ ratio is constant, a feature not shown by the metasediments. This is interpreted as evidence of permeation of the migmatites by metasomatising fluids. Granitic sheets which are common in the migmatites have a very variable and predominantly sodium-rich composition more easily reconciled with metasomatism than a simple magmatic or anatectic origin. Attention is also drawn to the sodic nature of the large mass of Loch Coire granite which occurs in the centre of the migmatite area and the possibility is considered that the uprise of sodic magma provided sodium-rich fluids for permeation of the rest of the complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370983
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    The metasomatic development of zoned ultrabasic bodies in Unst, Shetland (1969)
    Springer
    Contributions to mineralogy and petrology 24 (1969), S. 275-292 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Read (1934b) described the mineralogy and regional setting of spectacularly zoned ultrabasic bodies occurring in Unst, Shetland. Chemical and phase compositional data are presented here for a selection of samples taken from each of the several “monomineralic” zones. The phase sequence and elemental distribution are discussed in some detail since both are complicated. It is shown that virtually all distributional features may be explained on the basis of a diffusion model: transport most probably having occurred via aqueous solutions in pore space. The present configurations represent “frozen” reaction intermediates. Controls upon the nature and extent of reaction are analysed. Certain features may be explained on the basis of “local equilibrium thermodynamics”. These arguments, however, are inadequate. Fairly simple kinetic considerations lead to a much more satisfactory analysis. Some of the problems associated with concepts of element “mobility” are discussed briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371271
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...