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  • 1
    Electronic Resource
    Electronic Resource
    The dating of shallow faults in the Earth's crust (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 412 (2001), S. 172-175 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Direct dating of ductile shear zones and calculation of uplift/exhumation rates can be done using various radiometric dating techniques. But radiometric dating of shallow crustal faulting, which occurs in the crust's brittle regime, has remained difficult because the low temperatures typical of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35084053
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Contradictions of slate formation resolved? (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 392 (1998), S. 348-348 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Slate is formed from clay-rich mud in response to tectonic stress. It has been studied for more than 150 years and was among the first geological features to be analysed on the microscopic scale. Early observations recognized the importance of micaceous minerals to the splitting of slate into ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/32810
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison of garnet-biotite, calcite-graphite, and calcite-dolomite thermometry in the Grenville Orogen; Ontario, Canada (1999)
    Springer
    Contributions to mineralogy and petrology 134 (1999), S. 217-231 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Elzevir Terrane of the Grenville Orogen in southern Ontario contains metapelites and abundant graphitic marbles that were regionally metamorphosed from the upper greenschist to upper amphibolite facies. Comparative thermometry was undertaken with widely used calibrations for the systems garnet-biotite, calcite-dolomite, and calcite-graphite. Temperatures that are obtained from matrix biotites paired with prograde garnet near-rim analyses are usually consistent with those determined using calcite-graphite thermometry. However, calcite-graphite thermometry occasionally yields low temperatures due to lack of equilibration of anomalously light graphite. Application of calcite-graphite and garnet-biotite systems may yield temperatures up to 70 °C higher than calcite-dolomite in amphibolite facies rocks. Calcite-dolomite temperatures most closely approach those from calcite-graphite and garnet-biotite when the samples contain a single generation of dolomite and calcite grains contain no visible dolomite exsolution lamellae. However, some of these samples yield temperatures considerably lower than temperatures calculated from calcite-graphite and garnet-biotite thermometry, indicating that the calcite-dolomite thermometer may have been partially reset during retrogression. Estimated peak metamorphic temperatures of regional metamorphism between Madoc (upper greenschist facies) and Bancroft (upper amphibolite facies) range from 500 to 650 °C. These results place the chlorite-staurolite isograd at 540 °C, the kyanite-sillimanite isograd at 590 °C, and the sillimanite-K-feldspar isograd at 650 °C. Although each thermometer may have an absolute uncertainty of as much as ±50 °C, the 50 to 60 °C temperature differences between the isograds are probably accurate to 10 to 20 °C. An incomplete picture of the thermal gradients can result from the application of only one thermometer in a given area. Simultaneous application of several systems allows one to recognize and overcome the inherent limitations of each thermometer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050480
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  • 4
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    Grain size and magnetic fabric analyses
    PANGAEA
    In:  Supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (1998): Use of grain size and magnetic fabric analyses to distinguish among depositional environments. Paleoceanography, 13(5), 491-501, https://doi.org/10.1029/98PA01939
    Details
    Publication Date: 2023-05-12
    Description: The combined use of grain size and magnetic fabric analyses provides the ability to discriminate among depositional environments in deep-sea terrigenous sediments. We analyzed samples from three different depositional settings: turbidites, pelagic or hemipelagic interlayers, and sediment drifts. Results indicate that sediment samples from these different environments can be distinguished from each other on the basis of their median grain size, sorting, as well as the intensity and shape of magnetic fabric as determined from an examination of the anisotropy of magnetic susceptibility. We use these discriminators to interpret downcore samples from the Bermuda Rise sediment drift. We find that the finer grains of the Bermuda Rise (relative to the Blake Outer Ridge) do not result from lower depositional energy (current speed) and so may reflect a difference in the nature of sediment being delivered to the site (i.e., distance from source) between the two locations.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    (Table 2) Sedimentology of the Pliocene section of the DSDP Gardar Drift Site 94-611C in the North Atlantic
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 94-611C; Accumulation rate, calcium carbonate; Accumulation rate, mass; Accumulation rate, terrigenous; AGE; Calcium carbonate; Calculated; Carbonate bomb (Müller & Gastner, 1971); Cibicides spp., δ13C; Cibicides spp., δ18O; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Isotope ratio mass spectrometry; Kappabridge; Leg94; Magnetic susceptibility, volume; Magnitude of anisotropy; Median, grain size; North Atlantic/RIDGE; Sample code/label; Shape of susceptibility; Terrigenous; Wet-chemistry (Rea & Janecek, 1981)
    Type: Dataset
    Format: text/tab-separated-values, 265 data points
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  • 6
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    (Table 1) Sedimentology of the Pliocene section of the DSDP Feni Drift Site 94-610 in the North Atlantic
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 94-610_Site; Accumulation rate, calcium carbonate; Accumulation rate, mass; Accumulation rate, terrigenous; AGE; Calcium carbonate; Calculated; Carbonate bomb (Müller & Gastner, 1971); Cibicides spp., δ13C; Cibicides spp., δ18O; COMPCORE; Composite Core; Deep Sea Drilling Project; DEPTH, sediment/rock; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Isotope ratio mass spectrometry; Kappabridge; Leg94; Magnetic susceptibility, volume; Magnitude of anisotropy; Median, grain size; North Atlantic/RIDGE; Sample code/label; Shape of susceptibility; Terrigenous; Wet-chemistry (Rea & Janecek, 1981)
    Type: Dataset
    Format: text/tab-separated-values, 215 data points
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  • 7
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    (Table 3) Radiogenic isotope analyses for sediment samples of the North Atlantic
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 94-610A; 94-611C; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Leg94; Mass spectrometer Finnigan MAT 262; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; North Atlantic/RIDGE; Sample code/label; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
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  • 8
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    (Table A) Results of inter-depositional environment analysis
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: CH89-1P; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Environment; Event label; GC; Gravity corer; Latitude of event; Longitude of event; Magnetic susceptibility; Magnitude of anisotropy; PC; Piston corer; Sample comment; Shape of susceptibility; Size; Standard deviation; W8209B; W8209B-19; W8209B-20; W8709A; W8709A-12; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 363 data points
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  • 9
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    (Table B) Results of analysis of Bermuda Rise sediment core CH89-9P
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: CH89-9P; DEPTH, sediment/rock; Magnetic susceptibility; Magnitude of anisotropy; PC; Piston corer; Shape of susceptibility; Size; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 432 data points
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  • 10
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    Physical properties and bulk minerals from IODP Holes 308-U1322B, U1322D and U1324B (2012)
    PANGAEA
    In:  Supplement to: Day-Stirrat, Ruarri J; Flemings, Peter B; You, Yao; Aplin, Andrew C; van der Pluijm, Ben A (2012): The fabric of consolidation in Gulf of Mexico mudstones. Marine Geology, 295-298, 77-85, https://doi.org/10.1016/j.margeo.2011.12.003
    Details
    Publication Date: 2023-05-12
    Description: How the micro-scale fabric of clay-rich mudstone evolves during consolidation in early burial is critical to how they are interpreted in the deeper portions of sedimentary basins. Core samples from the Integrated Ocean Drilling Program Expedition 308, Ursa Basin, Gulf of Mexico, covering seafloor to 600 meters below sea floor (mbsf) are ideal for studying the micro-scale fabric of mudstones. Mudstones of consistent composition and grain size decrease in porosity from 80% at the seafloor to 37% at 600 mbsf. Argon-ion milling produces flat surfaces to image this pore evolution over a vertical effective stress range of 0.25 (71 mbsf) to 4.05 MPa (597 mbsf). With increasing burial, pores become elongated, mean pore size decreases, and there is preferential loss of the largest pores. There is a small increase in clay mineral preferred orientation as recorded by high resolution X-ray goniometry with burial.
    Keywords: Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP
    Type: Dataset
    Format: application/zip, 2 datasets
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