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overburden

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Series: GSA Special Papers
Published: 01 September 2010
DOI: 10.1130/2010.2465(09)
... A ground-penetrating radar (GPR) survey was carried out in order to characterize reflection patterns at Paluküla Hill, at the NE portion of the rim of the 4-km-diameter, Upper Ordovician Kärdla impact crater. The results allow us to distinguish between the Quaternary overburden and layered...
Series: GSA Reviews in Engineering Geology
Published: 01 January 2008
DOI: 10.1130/2008.4119(05)
EISBN: 9780813758190
... long-term performance of subsequent waste isolation capability. A key part of that assessment is an evaluation of the stability of underground openings and overburden. The principal approach to such an evaluation is described by the recommendations of the working group “Salzmechanik” of the German...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 2000
AAPG Bulletin (2000) 84 (5): 627-651.
... strength and ductility of the overburden enhances the decoupling between the deep and shallow deformation. Alternatively, increasing the viscosity of the viscous layer, the thickness of the overburden, and the magnitude and rate of displacement on the master normal fault reduces the decoupling between...
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Journal Article
Journal: Geophysics
Published: 01 January 2000
Geophysics (2000) 65 (4): 1210-1222.
... velocity variation within a layer. The layer velocity is defined with only two parameters: an average velocity ( v 0 ) and a vertical velocity gradient ( β ). Layer velocity parameterization using v 0 and β assumes that the lithology of the layer is constant and that the overburden and fluid pressure...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1999
AAPG Bulletin (1999) 83 (5): 727-756.
... that horizontal and vertical stresses are equal. The source rock fails when the pore pressure equals the overburden pressure. (3) The properties of the rock, organic matter, and fluids remain constant during oil generation. This assumption is valid when the change in depth (i.e., pressure and temperature...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 1998
AAPG Bulletin (1998) 82 (11): 2031-2074.
.... Negative velocity anomalies in the central and southern parts of the basin outline an area within which overpressures in the Chalk exceed 10 MPa, equivalent to a burial anomaly greater than 1 km relative to the normal trend. The Chalk pressure system is primarily dependent on overburden properties because...
Journal Article
Published: 01 August 1998
Petroleum Geoscience (1998) 4 (3): 193-202.
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1998
AAPG Bulletin (1998) 82 (8): 1504-1527.
... modeling program. The burial and thermal history of the source rocks by overburden rocks within a province must be reconstructed before the timing of hydrocarbon genesis can be determined ( Figure 4 ). By relating the location of the hydrocarbon kitchen to the locations of accumulations, and by taking...
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Journal Article
Journal: Geophysics
Published: 01 February 1997
Geophysics (1997) 62 (1): 138-148.
... used in conjunction with a generalized form of a seismic fracture density model to estimate the vertical and lateral extent of fracturing in a 12-m thick overburden of loess, clay, glacial till, and outwash above a longwall coal mine at 90 m depth. This generalized model accurately predicted fracture...
Journal Article
Published: 01 August 1996
Canadian Journal of Earth Sciences (1996) 33 (8): 1201-1212.
... be mapped. Significant variations in seismic velocity also indicate variations in lithology or formation boundaries. Variations in overburden and weathering thicknesses are accurately defined at Gullbridge where the careful choice of shot – receiver configuration allows estimates of both lateral...
Journal Article
Published: 01 May 1996
Petroleum Geoscience (1996) 2 (2): 133-144.
... Hoek metamorphism was less than 290 degrees C. Circumstantial evidence suggests that temperatures prior to deposition of the Permian Miseryfjellet Formation were probably much lower than those during the Mesozoic. Maximum eroded overburden above the Miseryfjellet Formation can be estimated at 2900...
Journal Article
Journal: Economic Geology
Published: 01 April 1995
Economic Geology (1995) 90 (2): 308-321.
.... Mass balance studies show that during postlateritic weathering all levels of the profile have been absolutely enriched in gold and that the gold-bearing overburden has been eroded from the upper part of the profile. Gold enrichment has taken place by chemical and mechanical processes. In the saprolite...
Journal Article
Published: 01 March 1995
Bulletin de la Société Géologique de France (1995) 166 (2): 181-192.
Series: GSA Special Papers
Published: 01 January 1995
DOI: 10.1130/SPE299-p375
... to approximately a 17-km depth or more, at least 13 km greater than inferred stratigraphic overburden (2–4 km) at the time of intrusion. The excess we attribute to pre-intrusion tectonic burial from overthrusting of the observed allochthon of Proterozoic basement and (or) from earlier Mesozoic overthrusting...
Journal Article
Published: 01 January 1995
Environmental and Engineering Geoscience (1995) I (2): 173-190.
...SUNGAT ALTIS; NORMAN R. TILFORD Abstract Ordinary point kriging was used to map twenty-six vertically-averaged soil and oxidized overburden acidity values from a future mine block at the Jewett lignite mine, east-central Texas. The pH data were collected as part of a geochemical overburden...
Journal Article
Published: 01 January 1995
Environmental and Engineering Geoscience (1995) I (3): 327-340.
...KHALED HASAN Abstract Evaluation of the suitability of overburden as topsoil replacement material at the Jewett Lignite mine was conducted with an emphasis on the textural criteria and geochemical parameters. Attempts were made to determine the relationships between geologic units...
Journal Article
Journal: Economic Geology
Published: 01 November 1994
Economic Geology (1994) 89 (7): 1614-1622.
Journal Article
Published: 01 August 1993
Canadian Journal of Earth Sciences (1993) 30 (8): 1730-1740.
...Sylvain Vallières; Claude Hillaire-Marcel; Bassam Ghaleb Abstract The Pleistocene overburden deposits in the St. Lawrence Lowlands were dated by Th/U to test the Rosholt U-trend method which, in principle, is applicable to the age determinations in open systems. The A horizon of a Holocene soil...
Series: GSA Special Papers
Published: 01 January 1992
DOI: 10.1130/SPE271-p79
..., house construction, draftiness of house, heating source, basement construction, radon levels in the water supply, and the type of overburden and bedrock underlying the house. Logistic regression was used to determine which variables were significantly associated with indoor air radon levels of 4 pCi/L...
Series: GSA Special Papers
Published: 01 January 1991
DOI: 10.1130/SPE256-p1
... maturities, particularly for the younger sediments. Previous studies have concluded that a significant amount of Permo-Carboniferous overburden has been removed from this region by early Mesozoic regional uplift and erosion. If the missing overburden were sufficiently thick and thermally resistive...