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The AAPG/Datapages Combined Publications Database
Showing 8,089 Results. Searched 200,616 documents.
Fold and Thrust Propagation in the Western Himalaya Based on a Balanced Cross Section of the Surghar Range and Kohat Plateau, Pakistan (1)
JAMES W. MCDOUGALL and AHMAD HUSSAIN
AAPG Bulletin
... Tertiary section is at or near the surface show interval velocities of 3000 to 4200 m/s to 1 km deep, 4200 to 4600 m/s for 1 to 2 km, and 4500 to 6000...
1991
Application of Geophysical Method to Delineate Contamination in Waste Disposal Site of Ampar Tenang, Dengkil, Selangor D.E.
Abdul Rahim Samsudin, Umar Hamzah, Wan Zuhairi Wan Yaacob, Bahaa-eldin El Wali Abdel Rahim, Loh Yean Sze
Geological Society of Malaysia (GSM)
... as leachate plumes which appears to have seeped at depth as far as 20 m below surface. Near surface low resistivity layer observed on the area east...
2003
Efficiency of Tdem and EM-IP Methods Application for Reservoirs Exploration in South East Asia (Geophysics Paper 2)
Yuri A. Agafonov, Mustapha M. Salleh, Sophia V. Kompaniets, Olga V. Markovceva, Ilya V. Egorov, Igor V. Bouddo
Geological Society of Malaysia (GSM)
... size of sounding set, superior detail and locality of investigations, no influence of lateral near-surface heterogeneity. TDEM effectiveness...
2011
Pebbly Phosphorites in Shale: A Key to Recognition of a Widespread Submarine Discontinuity in the Middle Devonian of New York
Gordon C. Baird
Journal of Sedimentary Research (SEPM)
... cement in buried, sediment infilled shells and as isolated nodules within near-surface soft muds. These sediments were subjected to erosion resulting...
1978
Developments in Alaska in 1950
Ralph L. Miller
AAPG Bulletin
... areas. Permafrost, which extends from a foot or two beneath the surface to as much as 1,000 feet, causes the near-surface permafrost horizontal...
1951
Comparison of Marcellus Fracturing Using Azimuthal Seismic Attributes Versus Published Data From Outcrop Studies
Tanya L. Inks, Terry Engelder, Jacki S. Hocum, Bruce Golob, Darien O'Brien
Unconventional Resources Technology Conference (URTEC)
... using a modified form of the Dix Equation 2 (Dix, 1955). This process effectively strips off shallow layers, removing near surface anisotropy. The process...
2014
Abstract: Application of a Tomographic Velocity Model to the Prestack Depth Migration of a Buried Valley; #90172 (2014)
Oluwafemi Ogunsuyi, Douglas R. Schmitt
Search and Discovery.com
..., in R. Miller, J. Bradford, K. Holliger, G. Baker, and A. Levander, eds., Near surface seismology and ground penetrating radar: Society Exploration...
2014
Application of finite difference eikonal solver for traveltime computation in forward modeling and migration
Amir Mustaqim Majdi, Seyed Yaser Moussavi Alashloo, Nik Nur Anis Amalina Nik Mohd Hassan, Abdul Rahim Md Arshad, Abdul Halim Abdul Latiff
Geological Society of Malaysia (GSM)
.... Geophysical Properties of the Near Surface Earth: Seismic Properties. In: Gerald Schubert (Ed.), Treatise on Geophysics: Second Edition. 595 p. https...
2021
Groundwater exploration using vertical electrical sounding and 2D electrical resistivity tomography in shale formation: A case study of Sabongida, Plateau State, North Central Nigeria
Solomon Nehemiah Yusuf, Hilnan Christopher Drenkat, Charity Mamza Azi
Geological Society of Malaysia (GSM)
... conglomerate of laterite which are reddish in color. A thin lateral layer of shale/sandstone/siltstone with low resistivity values varying from 55...
2022
III. Evidence of Faulting
Robert E. Sheriff
AAPG Special Volumes
... involved, merely by piling additional sediments on top. The shale had a fairly low velocity when near the surface, possibly about 1667 m/sec (5500 ft/sec...
1981
Contemporary Seismicity and Tectonics of the Northern and Central Coast Ranges-Sierran Block Boundary Zone, California
Ivan G. Wong, Richard W. Ely, Auriel C. Kollmann
Pacific Section of AAPG
...]. The Great Valley-Sierran foothills model contains no near-surface, low-velocity layer because the ray paths between earthquakes along the boundary zone...
1992
Abstract: Imaging the Nechako Basin, British Columbia, using Magnetotelluric Methods; #90171 (2013)
J.E. Spratt and J. Craven
Search and Discovery.com
... be reconsidered. The sedimentary packages of the Nechako Basin are imaged as a shallow conductive layer (1 – 200 Ohmm) that extend from the surface, or near-surface...
2013
Hydrocarbon System Analysis for Methane Hydrate Exploration on Mars
Michael D. Max, Stephen M. Clifford, Arthur H. Johnson
AAPG Special Volumes
... of a global layer of water 0.51 km (0.30.6 mi) deep may be stored as ground ice and groundwater beneath the surface. The detection of methane establishes...
2013
Late Pleistocene Air Temperatures in the Bighorn Basin, Wyoming: Inferences from Periglacial Ice-Wedge Casts and the Numerical Modeling of Near-Surface Ground Temperatures
Nick Visser, Henry P. Heasler, Brainerd Mears Jr.
Wyoming Geological Association
... required for the formation of the ice-wedge casts observed on the Polecat Bench were inferred from the numerical modeling of near-surface ground...
1996
Suspended Material Over the Central Oregon Continental Shelf in May 1974: I, Concentrations of Organic and Inorganic Component
I. N. McCave
Journal of Sedimentary Research (SEPM)
... slopes upwards towards the coast indicating that upwelling was taking place. Clearer water below the surface mixed layer enters the shelf region from...
1979
Stratigraphic Architecture and Processes Controlling Coeval Deltaic, Platform Carbonate, and Condensed Shelf Sedimentation, Upper Pennsylvanian, Leavenworth Limestone-Heebner Shale-Plattsmouth Limestone-Heumader Shale Minor Cyclothem, SE Kansas and NE Oklahoma
Wan Yang, Michael Bruemmer, Monica Turner-Williams
Tulsa Geological Society
... in a surface layer (E) 10s m thick (Fig. 10). On shelves where the water depth is not much greater than E and the sea floor serves as a bottom boundary, major...
2003
7.0 The Structural Significance of Seismic Velocity - A Progress Report
P. E. Gretener
AAPG Special Volumes
... a geological liquid - salt is often encountered many kilometres above its mother-bed. In this unusual environment of only semi-consolidated, near-surface...
1981
Abstract: Relaxing the Near-Surface assumption in Estimating 3C Receiver Orientations: Azimuth-Stack Power Optimization of Reflected PS Data; #90187 (2014)
Nirupama (Pam) Nagarajappa, Peter Cary, and Chuck Ursenbach
Search and Discovery.com
... or in the presence of a single anisotropic layer. Furthermore these objective functions should be less affected by scattering in the near-surface than...
2014
I. Relating Seismic Data to Stratigraphy
Norman S. Neidell
AAPG Special Volumes
... STATIC CORRECTIONS End_Page 16------------------------- At a more subtle level, departures from linearity or small inhomogeneities at the near surface...
1979
Pedogenic Mud Aggregates Preserved In A Fine-Grained Meandering Channel In the Lower Permian Clear Fork Formation, North-Central Texas, U.S.A.
Sharane S.T. Simon, Martin R. Gibling
Journal of Sedimentary Research (SEPM)
... of clay and hematite may have provided some protection. Rapid Near-Surface Burial. For in situ and reworked aggregates in Triassic soil profiles...
2017
Abstract: 4D Seismic & Petroleum Geomechanics for Hydrocarbon Reservoirs; #90171 (2013)
Sunjay Sunjay
Search and Discovery.com
... velocity change in the reservoir layer might cause a significant shift in critical offset at the surface, since the distance from the top reservoir...
2013
Variation in the Chemical Composition of Oil-Field Brines with Depth in Northern Louisiana and Southern Arkansas: Implications for Mechanisms and Rates of Mass Transport and Diagenetic Reaction
Jeffrey S. Hanor
GCAGS Transactions
... and Cl reflect the on-going, steady-state mass transport of these constituents upward from thousands of feet of depth to the near surface. Na and Cl...
1984
Diagenesis of Sandstones in the Morrison Formation within the Paradox Basin
George N. Breit, Martin B. Goldhaber
Utah Geological Association
..., b) deeper burial, c) passage of fault-related solutions, and d) near-surface weathering. Figure 1. Generalized geologic map of the study area...
1996
Time-lapse full-waveform inversion by model order reduction using radial basis function
Haipeng Li, Robert G. Clapp
International Meeting for Applied Geoscience and Energy (IMAGE)
... synthetic examples: a CO2 plume monitoring scenario, a reflection-based time-lapse FWI, and an extension to elastic FWI for near-surface monitoring...
2024
The Effects of Deposit Feeding Oligochaetes on Particle Size and Settling Velocity of Lake Erie Sediments
Peter L. McCall
Journal of Sedimentary Research (SEPM)
... to the rate of deposition of new sediment and the rate of pellet decay, th n a pelletized layer can form at the sediment surface. This pellet layer...
1979