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The AAPG/Datapages Combined Publications Database
Showing 3,218 Results. Searched 200,691 documents.
A New Graphical Method for Torsion Balance-Topographic Corrections and Interpretations
C. A. Heiland
AAPG Bulletin
... are used. The author suggests a new method which is based on the use of spherical coordinates, the final formulae of which are very simple and which does...
1929
Authigenic Quartz Microfabrics in Cretaceous Turbidites: Evidence for Silica Transformation Processes in Sandstones
James P. Hendry , Nigel H. Trewin
Journal of Sedimentary Research (SEPM)
... in diameter (Fig. 4B). In contrast, pockmarked fabrics (cf. Fig. 3B) are absent. The fringes are accompanied by subspherical to spherical clusters...
1995
Origin of Sr-Rich Magnesian Calcite Mud in a Holocene Pond Basin (Lee Stocking Island, Bahamas)
George R. Dix
Journal of Sedimentary Research (SEPM)
... spherical to podiform calcitic bodies, 0.12-0.15 µm in diameter (Fig. 3E), that occur intermixed with and form small masses in the above sediments (Fig...
2001
Abstract: Physical Modeling for Azimuthal AVO Over a Simulated Fractured Medium; #90174 (2014)
Faranak Mahmoudian, Gary F. Margrave, and Joe Wong
Search and Discovery.com
..., 2012, Calgary, AB, Canada the directivity correction, specific to piezoelectric transducers with non-spherical radiation pattern, we used...
2014
Petrology and Reservoir Characteristics of the Smackover Formation, Hatter's Pond Field: Implications for Smackover Exploration in Southwestern Alabama
D. Joe Benson , Ernest A. Mancini
GCAGS Transactions
..., as circular patches of finer-grained dolomite included within the coarser mosaic, and as circular leached pores (Fig. 11). These ghosts are roughly spherical...
1982
Distribution of Hydrocarbons in Petroleum
E. G. Baker
AAPG Bulletin
..., spherical, isotropic micelle appears to enhance hydrocarbon solubility chiefly by incorporating hydrocarbons on its surface. However, hydrocarbons may...
1962
Migration of Oil in Recent Sediments of Pedernales, Venezuela: Topical Papers
Albert L. Kidwell , John M. Hunt
AAPG Special Volumes
... was deposited about 5,000 years ago. Measurements of excess hydrostatic pressure made in the holes and on undisturbed cores showed...
1958
Deep Mantle Convection Plumes and Plate Motions
W. Jason Morgan
AAPG Bulletin
.... GRAVITY AND TOPOGRAPHIC HIGHS Figure 4 shows a worldwide gravity map computed for spherical harmonics up to order 16 (Kaula, 1970). Isolated gravity highs...
1972
Modes of Formation of Anomalously High Radioactivity in Oil-Field Brines: GEOLOGIC NOTES
Salman Bloch , Robert M. Key
AAPG Bulletin
... and the U-238/U-234 disequilibrium in nature: Science, v. 173, p. 47-48. Kronfeld, J., et al, 1975, Excess 234U: an aging effect in confined waters: Earth...
1981
Marine Seismic Sources: Part VI: High Frequency Signals From Air-Guns
Martin Landrø, Lasse Amundsen
GEO ExPro Magazine
... 150 Hz, far in excess of the low-frequency noise generated by the source vessel. Spectral source levels (measured in decibels) were highest below 100...
2011
The Resistivity Logs
John H. Doveton
Special Publications of SEPM
... and their geometry. The common reservoir framework minerals of quartz, calcite and dolomite have resistivities in excess of 100 million ohm-meters, and so can...
1994
A Gravity and Magnetic Survey of the Ute Mountain Ute Indian Reservation, Colorado and New Mexico
Michael W. Webring, Gerda A. Abrams
Utah Geological Association
.... Theoretical gravity begins with predicted gravity at sea level on a oblate spherical rotating earth. These data are corrected for distance above sea level...
1996
Beryllium and Associated Mineralization in the Sheeprock Mountains
Robert E. Cohenour
Utah Geological Association
... of crystals whose “c” axes radiate from a common center to produce spherical and nodular masses up to 2 feet in diameter, (3) in massive form in tiny...
1963
Porosity: Part 5. Laboratoy Methods
M. Peter Cone, David G. Kersey
AAPG Special Volumes
... interconnected pores plus the volume of all bound water in excess of the volume of a film of water, two molecules thick, retained by smectite. Keelan (1982...
1992
Depositional and Diagenetic Controls on Source-Rock Characteristics of the Lower Jurassic "Nordegg Member", Western Canada
Cynthia L. Riediger , John D. Bloch
Journal of Sedimentary Research (SEPM)
... %, excess sulfides were incorporated into the kerogen. This process resulted in the early diagenetic formation of the sulfur-rich kerogen (Type I/II...
1995
From Mud to Shale: the Role of Microquartz Cementation; #50206 (2009)
Jens Jahren, Brit Thyberg, Øyvind Marcussen, Turid Winje, Knut Bjørlykke, and Jan Inge Faleide
Search and Discovery.com
... quartz released in the clay mineral reaction smectite to illite within the micropores of the shale precipitate as 1-3 µm sub-spherical discrete...
2009
Manganese-Nodule Bedforms and Thermohaline Density Flows in a Deep-Sea Valley on Carnegie Ridge, Panama Basin
Peter Lonsdale
Journal of Sedimentary Research (SEPM)
... that are driven by pressure gradients within oceanic basins. The best known abyssal density flows are turbidity currents, whose excess density, perhaps 5-30 percent...
1980
Application of Seismography to Geological Problems
Eugene McDermott
AAPG Bulletin
... accurately stated, the wave front is spherical. If the material is not homogeneous the path is curved, that is, the wave is gently refracted, and the wave...
1931
Sediments of Great Salt Lake
A. J. Eardley
Utah Geological Association
... sphercity in form but few are truly spherical, ordinarily having one axis longer than the other two. This is commonly a reflection of an initially elongate...
1966
Distribution of Microborings Within Continental Margin Sediments of the Southeastern United States
Brian D. Edwards , Ronald D. Perkins
Journal of Sedimentary Research (SEPM)
.... Spinate microborings, although very limited in their distribution and abundance, were restricted to sediments collected from depths in excess of 25 m, sugge...
1974
Calibration of Agglutinated Foraminifera, Rhodochrosite Micronodules, and Pyritized Radiolarian Events into Gulf of Mexico Deepwater Wilcox Biostratigraphic and Chronostratigraphic Zonations
Gerald Jerry Ragan, Bruce Desselle, and Robert Campbell
GCAGS Transactions
..., they were referred to as phosphate nodules, concretions, spheroids, micronodules, internal molds of spherical agglutinated and planktonic foram chambers...
2025
Experimental Compaction of Ooids Under Deep-burial Diagenetic Temperatures and Pressures
Ajit Bhattacharyya , Gerald M. Friedman
Journal of Sedimentary Research (SEPM)
... are proceeding along two parallel lines: (1) petrographic studies of carbonate rocks from depths in excess of 6 km and (2) compaction of modern carbonate...
1984
Initiation of the Iceland Plume and Opening of the North Atlantic: Chapter 10: North Atlantic Perspectives
R. S. White
AAPG Special Volumes
...., in press). Along the present Reykjanes Ridge spreading center, igneous crustal thicknesses decrease southward away from Iceland. They are in excess of 15 km...
1989
Quantification of pore structure and its effect on sonic velocity and permeability in carbonates
Ralf J. Weger, Gregor P. Eberli, Gregor T. Baechle, Jose L. Massaferro, Yue-Feng Sun
AAPG Bulletin
... velocity is not solely controlled by the percentage of spherical porosity, and (3) quantitative pore geometry characteristics can be estimated from...
2009
Finite Difference Modelling: Part IV
Lasse Amundsen, Ørjan Pedersen, Martin Landrø
GEO ExPro Magazine
... velocity, the wave originating at the source expands in a series of spherical wavefronts centred on that source; a consequence of Fermat’s principle...
2019