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The AAPG/Datapages Combined Publications Database

Showing 10,599 Results. Searched 191,954 documents.

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Study of Structure of Suwa Basin Near Kyoto, Japan, by Torsion Balance

M. Matsuyama, Y. Fujita, H. Higashinaka

AAPG Bulletin

... observation values can be made. If the depth and the dip of the bed rock are assumed, as shown in Figure 3, the calculated results satisfactorily...


Extending the Resolution of Seismic Reflection Exploration

L. R. Denham

Pacific Section of AAPG

... roll by velocity filtering is used. Realistic values for frequency, depth and dip of reflections will usually give a minimum number of groups around 100...


ABSTRACT: The Petrography of Ancient Organic Matter in Black Shale Weathering Profiles; #90113 (2010)

Lehne E. Slater and S. M. Rimmer

Search and

...ABSTRACT: The Petrography of Ancient Organic Matter in Black Shale Weathering Profiles; #90113 (2010) Lehne E. Slater and S. M. Rimmer...


Techniques in Sedimentary Geochemistry: (1) Separation of the Detrital and Non-Detrital Fractions of Limestones

D. M. Hirst, G. D. Nicholls

Journal of Sedimentary Research (SEPM)

... in high quality carbon anodes accurately machined to the following dimensions: outside diameter 4.8 mm, crater internal diameter 3.2 mm, crater depth...


Clay Minerals as Cumulative Records of Their Environments: ABSTRACT

W. D. Keller

AAPG Bulletin

...) the energies (climate, weathering, sedimentation, etc.) that effect the changes on the materials, and (3) the flow of time through which the energies act...


Organic Matter in Black Slate Shows Oxidative Degradation Within Only a Few Decades

Cornelius Fischer, Volker Karius, Volker Thiel

Journal of Sedimentary Research (SEPM)

.... 2002). Assuming a variable weathering depth, areas of black shale exposed to oxidative weathering can be calculated (Table 2). The higher the average...


Strontium Isotopes of Tertiary Phillipsites from the Southern Pacific: Timing of the Geochemical Evolution

Norbert Clauer

Journal of Sedimentary Research (SEPM)

... in "contaminant" authigenic phases. Careful leaching experiments with mass-balance calculations of the external and internal Rb and Sr of the zeolites...


Detailed Stratigraphic Control Through Dip Computations

J. A. Gilreath , J. J. Maricelli

AAPG Bulletin

... to that of the basic resistivity log. The base of the arrow denotes both the depth of the level and the magnitude of the dip. The scale for amount of dip is shown...


Critical Analysis of Stack Seismic Systems

L. E. Nugent, Jr.

AAPG Bulletin

... result in erroneous dip or fault indications. Furthermore, in some stack systems uphole data are not obtained and, in areas in which weathering problems...


First-Arrival Traveltime Inversion in the CMP Domain: Method and Application

Search and

... layer thickness estimation because of absence of very near offsets associated with the shallowest weathering layer. The velocity-depth pairs of each...


The Use of the Common Pb Isotope Composition of Detrital K-Feldspar Grains as a Provenance Tool and Its Application to Upper Carboniferous Paleodrainage, Northern England

S. Tyrrell, P.D.W. Haughton, J.S. Daly, T.F. Kokfelt, D. Gagnevin

Journal of Sedimentary Research (SEPM)

...-feldspar grains a useful provenance tool. However, it is unclear how robust this signal is, and to what extent it can be modified by weathering...


Inferring Stratigraphy from Seismic Data

R. E. Sheriff

AAPG Bulletin

..., such as might result from variations in offset, source, geophone plant or streamer depth, delays in weathering or seafloor sediments...


Bulk Geochemistry of Woodlark Basin and Solomon Islands Offshore Sediments: Some Implications for Crustal Evolution

Keith A. W. Crook, Gordon R. Taylor, Barrie R. Bolton

Circum Pacific Council Publications

... versus Si02 mimic magmatic differentiation trends but result from chemical differentiation during weathering and sedimentation, rather than from...


Some Petrophysical Aspects of the Mississippian "Chat" Glick Field, Kiowa County, Kansas

Jack D. Duren

Oklahoma City Geological Society

... that porosity below 15-20 per cent will be water filled. Free water level, i.e., where capillary pressure is zero, calculations from capillary pressure curves do...


Abstract: Weathering Profiles over Granitic Bedrock - Morphological Zones, Seismic Velocities and Excavability Characteristics

John Kunaraj

Geological Society of Malaysia (GSM)

...Abstract: Weathering Profiles over Granitic Bedrock - Morphological Zones, Seismic Velocities and Excavability Characteristics John Kunaraj 283...


Abstract: Description and Classification of Filled Joint in Granite „ An Approach

Mohd. For Mohd. Amin, Azman Kassim

Geological Society of Malaysia (GSM)

... Engineering, UTM Skudai The weathering degree of joint blocks and its infilling affects the deformational behaviour of filled joint. To appreciate its behaviour...


Seismic Imaging through Outcropping Carbonates: An Example from the Canadian Rocky Mountains, , #41533 (2015).

Yong Hua, Don C. Lawton

Search and

..., Calgary, AB, Canada 2 Abstract We investigated a seismic time processing procedure that provides an optimum dataset for advanced depth imaging...


Influences of Modern Pedogenesis On Paleoclimate Estimates from Pennsylvanian and Permian Paleosols, Southeast Ohio, U.S.A.

Sarah J. Kogler, Daniel I. Hembree

Journal of Sedimentary Research (SEPM)

... fluorescence (XRF) for major-oxide geochemistry. These data were used to calculate molecular weathering ratios, MAP, and MAT at each depth. Results indicate...


Laramide Mountain Flank Deformation and the Golden Fault Zone, Jefferson County, Colorado

Robert J. Weimer, R. Randy Ray

Rocky Mountain Association of Geologists



Geophysical and Petrological Study of Precambrian of Central Alberta, Canada

G. D. Garland , R. A. Burwash

AAPG Bulletin

... Mountains, at least as far west as Banff. Depth estimates made from gravity profiles strongly suggest that the Precambrian has been uplifted beneath...


Low-Porosity Haloes at Stylolites in the Feldspathic Upper Jurassic Ula Sandstone, Norwegian North Sea: An Integrated Petrographic and Chemical Mass-Balance Approach

Nicholas B. Harris

Journal of Sedimentary Research (SEPM)

... the stylolite. Chemical mass-balance calculations demonstrate that silica and elements associated with feldspar (Al2O3, Na2O, K2O) were exported from...


Regularities in the Changes of Physical Parameters of Rocks in the Kuybyshev Trans-Volga Region

L. N. Elanskiy

Petroleum Geology: A Digest of Russian Literature

.... (October) 1. Andreev, B. A., 1954, Determination of the depth to the surface of the crystalline basement of platform areas according to magnetic...


Mudstone Petrology of the Mesoproterozoic Unkar Group, Grand Canyon, U.S.A.: Provenance, Weathering, and Sediment Transport on Intracratonic Rodinia

John D. Bloch, J. Michael Timmons, Laura J. Crossey, George E. Gehrels, Karl E. Karlstrom

Journal of Sedimentary Research (SEPM)

...Mudstone Petrology of the Mesoproterozoic Unkar Group, Grand Canyon, U.S.A.: Provenance, Weathering, and Sediment Transport on Intracratonic Rodinia...


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