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  • 1
    Series available for loan
    Series available for loan
    London : Brit. Antarctic Survey
    Associated volumes
    Call number: ZSP-164-59
    In: Scientific reports
    Description / Table of Contents: The geology of the Oscar II Coast and the Seal Nunataks, which was mapped in the field on a scale of 1 : 100,000, is described. The oldest stratigraphic unit discovered in this area is the Trinity Peninsula Series, consisting of a great thickness of geosynclinal sediments which have been regionally metamorphosed and isoclinally folded about west-south-west to east-north-east axes. Jurassic sedimentary beds were deposited in hollows on an erosion surface cut across the highly folded Trinity Peninsula Series sediments. [...]
    Type of Medium: Series available for loan
    Pages: 46 S., 12 Bl.
    Series Statement: Scientific reports / British Antarctic Survey 59
    Branch Library: AWI Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    London : The Geological Society
    Associated volumes
    Call number: 11/M 04.0178
    In: Rock-forming minerals
    Type of Medium: Monograph available for loan
    Pages: XX, 758 S.
    Edition: 2nd ed.
    ISBN: 1862391424
    Classification:
    Mineralogy
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 3
    Publication Date: 2023-06-27
    Keywords: 68-501; 69-504B; Comment; Comment 2 (continued); Deep Sea Drilling Project; Description; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; d-spacing; Event label; Glomar Challenger; Leg68; Leg69; North Pacific/FLANK; Sample code/label; X-ray diffraction (XRD)
    Type: Dataset
    Format: text/tab-separated-values, 45 data points
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  • 4
    Publication Date: 2023-06-27
    Keywords: 69-504B; Aluminium; Calcium; Calculated based on oxygen number; Charge; Comment; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Interlayer charge; Iron 2+; Iron 3+; Leg69; Magnesium; Octahedral charge; Potassium; Sample code/label; Sample ID; Silicon; Sodium; Sum; Tetrahedral charge
    Type: Dataset
    Format: text/tab-separated-values, 37 data points
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  • 5
    Publication Date: 2023-06-27
    Keywords: 69-504B; Aluminium oxide; Calcium oxide; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Glomar Challenger; Iron oxide, FeO; Leg69; Magnesium oxide; Potassium oxide; Sample code/label; Sample ID; Silicon dioxide; Sodium oxide; Total
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
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  • 6
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Andrews, Anthony J; Dollase, W A; Fleet, M E (1983): A Mössbauer study of saponite in layer 2 basalt, Deep Sea Drilling Project Leg 69. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 69, 585-588, https://doi.org/10.2973/dsdp.proc.69.131.1983
    Publication Date: 2023-06-27
    Description: Mössbauer analyses were conducted on a sample of saponite selected from DSDP Leg 69 basalt core. The sample was initially placed within a nitrogen-purged container on-board Glomar Challenger approximately three hours after recovery, where it remained until analysis. The Mössbauer data revealed an original, in situ Fe2O3/FeO ratio of 0.46, with both Fe**2+ and Fe**3+ in octahedral coordination. With controlled exposure to air under ambient laboratory storage conditions, the proportion of Fe**3+ increased from an original 30% to 51% over a period of about 11.5 months. The Fe**3+ thus produced remained in octahedral coordination, and no observable changes occurred in the physical appearance of the sample.
    Keywords: 68-501; 69-504B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68; Leg69; North Pacific/FLANK
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 39 (1967), S. 253-255 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Bogosu-Prestea mining district of southwestern Ghana is a 33 km section of the Early Proterozoic Ashanti Gold Belt. Greenschist facies carbonaceous and carbonate-bearing turbidites and greywackes, and mafic dikes host numerous economic mesothermal gold deposits. Structurally higher ores in the Bogosu concession have brittle deformation and consist of disseminated-sulphide lodes in tectonically-disrupted sedimentary rocks and carbonate-altered mafic dikes. Most gold occurs as micrometre-size particles in arsenian pyrite, and as “invisible” gold in arsenian pyrite and arsenopyrite. The structurally deeper ores of the adjoining Prestea concession are associated with brittle-ductile deformation and consist of extensive crack-seal quartz-veins and graphitic shear zones. Only minor amounts of “invisible” gold were detected; in these deeper lodes, gold occurs dominantly as abundant microscopic and larger particles in sulphide/arsenide minerals and in gangue. The gold distribution patterns revealed by SIMS microprobe analysis and ion maps, EMP and colour staining suggest that most of the primary gold in the Bogosu-Prestea system precipitated in solid-solution with sulphide/arsenide minerals. However, post-depositional concentration and redistribution occurred, in increasing degree with: 1) increase in metamorphic/hydrothermal gradients in the gold system (depth), 2) decrease in the refractory properties of the host mineral, and 3) increase in the amount of post-depositional, host-mineral recrystallization and deformation. Gold evolved from primary solid-solution within sulphide/arsenide minerals, to colloidal and micrometre-size particles concentrated in voids, fractures and internal grain boundaries, and finally to microscopic and larger particles at sulphide/arsenide grain margins and in the gangue assemblage. The general conclusions presented here are applicable to As-rich gold deposits of all ages, worldwide. The presence of gold in late fractures is insufficient evidence for late-stage introduction of gold in mesothermal gold systems.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 1202-1204 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 232-234 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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