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The AAPG/Datapages Combined Publications Database
Showing 661 Results. Searched 195,387 documents.
Abstract: Three Dimensional Gravity Modelling of Southern African Crust and Upper Mantle, by Susan J. Webb and David E. James; #90082 (2008)
Search and Discovery.com
2008
The Effects of Eolian Sorting and Abrasion Upon the Shapes of Fine Quartz Sand Grains
Jim Mazzullo, Donald Sims, David Cunningham
Journal of Sedimentary Research (SEPM)
... can be represented by a series of standard-shape components, called harmonics. Each harmonic is of the form Rn cos(n - n), where Rn represents...
1986
Contribution of Salinas River Sand to the Beaches of Monterey Bay, California, During the 1978 Flood Period: Fourier Grain-Shape Analysis
Ross A. Clark , Robert H. Osborne
Journal of Sedimentary Research (SEPM)
... beach sand. The average mean harmonic amplitude spectrum appears similar to the southern beach and Salinas River distributions. Chi-square tests...
1982
Grain Shape Analysis: Application to Problems of Sediment Source and Transport
Dr. Jim Mazzullo
GCAGS Transactions
... to the empiric shape. The relative contribution of each harmonic to the empiric shape is called "harmonic amplitude value", or simply "amplitude...
1982
Spalled Quartz Overgrowths as a Potential Source of Silt
Stephen K. Kennedy, Fehmi Arikan
Journal of Sedimentary Research (SEPM)
... component, or harmonic, is a specific geometric form; the second measures elongation, the third measures triangularity, and the higher harmonics...
1990
Abstract: An Introduction to Permeability Averaging and the Effects of Scale on the Permeability of Heterogeneous Rocks, by James W. Jennings; #120034 (2012)
Search and Discovery.com
2012
A Comparison of Fourier and Fractal Techniques in the Analysis of Closed Forms
Stephen K. Kennedy, Wei-Hsiung Lin
Journal of Sedimentary Research (SEPM)
... and Weinberg 1970; Kennedy and Ehrlich 1985). Briefly, in the Fourier analysis each grain is represented by 24 harmonic amplitudes and phase angles. Each...
1992
A Vertical Pattern of Variation in the St. Peter Sandstone--Fourier Grain Shape Analysis
James M. Mazzullo, Robert Ehrlich
Journal of Sedimentary Research (SEPM)
... of the "nth" harmonic and the remainder concerns the phase angle of that harmonic. The set of harmonic amplitudes constitutes the "harmonic amplitude...
1980
Upscaling Fault Flow Properties for Evaluation of Cross-Fault Flow, #41390 (2014)
Alton A. Brown, Russell K. Davies
Search and Discovery.com
... to the fault plane follow the power mean between the geometric and the harmonic average of the permeability of the constituent elements. Results presented...
2014
Petrophysical Characterization of Bioturbated Sandstone Reservoir Facies In the Upper Jurassic Ula Formation, Norwegian North Sea, Europe
Greg M. Baniak,, Murray K. Gingras, Beverly A. Burns, S. George Pemberton
Journal of Sedimentary Research (SEPM)
... (arithmetic, harmonic, and geometric) are commonly used to determine an average permeability that is equivalent to a homogeneous system (Muskat 1937...
2015
Vibration Induced Fatigue; Threats and Mitigation
Helge Lawrenz
Indonesian Petroleum Association
...) curves, depicted in Figure 2, effectively demonstrates this. The S-N curve approximates the average number of cycles that a material and geometry can...
2015
ABSTRACT: Fractal analysis of carbon deposits
M. Piechaczek, L. Smedowski
The Society for Organic Petrology (TSOP)
... was analyzed using the software HarFa v. 5.5.3. HarFA is a software that was compiled to perform harmonic, wavelet and/or fractal analysis of digital...
2013
A Preliminary Study of the Relationship Between Test Morphology and Bathymetry in Recent Bolivina Albatrossi Cushman, Northwestern Gulf of Mexico
Anthony C. Gary
GCAGS Transactions
... using Fourier harmonic amplitudes suggests the bathyal zone may be divided into four subzones. With further development this approach may allow...
1985
Differentiating Sediments from Different Sources in the Gulf Basin by Grain Shape Analysis: An Example from Late Pleistocene-Holocene Sediments of the Northwestern Gulf of Mexico Continental Shelf
K.D. Withers , Jim Mazzulo
GCAGS Transactions
... of the two provinces also differ. Rio Grande Province sands contain on the average 59% of the assemblage associated with the Highland Source Terrance...
1983
Integrated Quantitative Stratigraphy of the Cenomanian-Turonian Bridge Creek Limestone Member Using Evolutive Harmonic Analysis and Stratigraphic Modeling
Stephen R. Meyers , Bradley B. Sageman , Linda A. Hinnov
Journal of Sedimentary Research (SEPM)
...Integrated Quantitative Stratigraphy of the Cenomanian-Turonian Bridge Creek Limestone Member Using Evolutive Harmonic Analysis and Stratigraphic...
2001
SPHERICAL HARMONIC DEFORMATION
A. Challinor
Journal of Petroleum Geology
...SPHERICAL HARMONIC DEFORMATION A. Challinor 1979 75 102 1 3 A radically new method of structural analysis is proposed which relates the deformation...
1979
An Occurrence of "Brick Pattern" Oscillatory Ripple Marks at Mono Lake, California
Paul D. Komar
Journal of Sedimentary Research (SEPM)
... the harmonic motion of the near-bottom water that is produced by waves. The ripple marks so generated appeared to conform well with those formed in a wave...
1973
The Earths radial conductivity model derived from the latest CSES and Swarm satellite data
Mingquan Lai, Xiuyan Ren, Changchun Yin, Yunhe Liu, Bo Zhang, Yang Su
International Meeting for Applied Geoscience and Energy (IMAGE)
... a single spherical harmonic function Y10 cos (Banks & Ainsworth, 1992), where represents the geomagnetic colatitude. Above the Earth's surface...
2023
Characterization of Alluvial Sources in the Owens Valley of Eastern California Using Fourier Shape Analysis
J. L. Wagoner, J. L. Younker
Journal of Sedimentary Research (SEPM)
... by the average radius of the grain, so that shape comparisons could be made, independent of size. RESULTS The geologic setting and design of this study were...
1982
Abstract: A Method to Suppress Slip Sweep Harmonic in the Field and Its Effect, by Y. Lan, H. Xu, and G. Qian, #90188 (2014)
Search and Discovery.com
2014
Abstract: Towards Using Harmonic Noise to Image Shallow Thin Reflectors; #90187 (2014)
Christopher B. Harrison, Gary Margrave, Michael Lamoureux, Art Siewert, Andrew Barrett, and Helen Isaac
Search and Discovery.com
...Abstract: Towards Using Harmonic Noise to Image Shallow Thin Reflectors; #90187 (2014) Christopher B. Harrison, Gary Margrave, Michael Lamoureux...
2014
Study of Upscaling Permeability from Thin Sections Using 3D Pore Space Image and Pore Network Modeling (Geology Poster 24)
Luluan A. Lubis, Zuhar Zahir Tuan Harith
Geological Society of Malaysia (GSM)
... (horizontal) direction, while the geometric or harmonic mean is used to average permeability perpendecular to the bedding. CONCLUSIONS Keehm et al., (2006...
2011
A Method for Reducing the Effects of Base Plate Distortion
S. A. Sorkin
Pacific Section of AAPG
... of base plate distortion can be serious, especially when using a down sweep. Any harmonic frequencies present in the signal being cross-correlated...
1972
Stochastic Analysis of Monthly Precipitation Data in Alabama
Emmanuel E. Udoh, Nosa O. Egiebor, Kafui Nyavor
GCAGS Transactions
... in the average value of the time series with respect to time. For the hydrological time series, linear trend is adequate and it can be approximated...
1998