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The AAPG/Datapages Combined Publications Database

Showing 10,598 Results. Searched 191,921 documents.

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Early Evolution of the Oceansa„A Weathering Model

G. Michel Lafon, Fred T. Mackenzie

Special Publications of SEPM

... of siderite and ankerite supported are balance to some calculations These degree by on the sub Garrels and weathering of basalts Mackenzie...


How to Make Velocity Corrections

John W. Daly

AAPG Bulletin

... in Case IV to the assumption that the speed layers are parallel at the surface and dip at a rate which varies as a function of the depth. In this latter...


Abstract: Weathering Path Diagram (WPD)

Kadderi Md. Desa

Geological Society of Malaysia (GSM)

...Abstract: Weathering Path Diagram (WPD) Kadderi Md. Desa 195 Weathering path diagram (WPD) KAnDERI MD. DESA Jabatan Geologi, Universiti Kebangsaan...


Evidence for Biological and Hydrological Controls on the Development of a Paleoproterozoic Paleoweathering Profile in the Baraboo Range, Wisconsin, U.S.A.

Steven G. Driese, L. Gordon Medaris Jr.

Journal of Sedimentary Research (SEPM)

... and alteration of feldspars and mafic minerals (now sericite and Fe-oxides). Geochemical evidence for weathering includes depth-dependent whole-rock...


Evidence for the Formation of Illite from Smectite During Burial Metamorphism in the Belt Supergroup, Clark Fork, Idaho

Eric Eslinger , Barbara Sellars

Journal of Sedimentary Research (SEPM)

... suite indicates that the illite formed from smectite during metamorphism rather than from the direct weathering of some high-temperature phase...


Limitations on Resolution of Seismic Reflections and Geologic Detail Derivable from Them: Section 1. Fundamentals of Stratigraphic Interpretation of Seismic Data

Robert E. Sheriff

AAPG Special Volumes

... in the source waveshape; and surface-consistent amplitude processing and divergence corrections remove amplitude variations not relevant to the subsurface...


Geophysical Techniques Used in Uranium Exploration

P.A. Meyer

Rocky Mountain Association of Geologists

... of thorium and potassium. Corrections that enter into the calculation of percent uranium from drill hole logging are the correction factors for air, water...


Role of Organic Acids in Controlling Mineral Scale Formation During Hydraulic Fracturing at the Marcellus Shale Energy and Environmental Laboratory (MSEEL) Site

J. Alexandra Hakala, Thai Phan, Mengling Stuckman, Harry M. Edenborn, Christina L. Lopano

Unconventional Resources Technology Conference (URTEC)

... the accuracy, reliability, or timeliness of any information herein. All information is the responsibility of, and, is subject to corrections...


Deposition of Free Oil by Sediments Settling in Sea Water

O. A. Poirier , George A. Thiel

AAPG Bulletin

... the amount FOOTNOTE *. Corrections were made for weight calculations of hydrous salts. FOOTNOTE 4. W. W. Rubey, "Lithologic Studies of Fine-Grained...


Remote surface mapping using orthophotos and geologic maps draped over digital elevation models: Application to the Sheep Mountain anticline, Wyoming

Subhotosh Banerjee and Shankar Mitra

AAPG Bulletin

... of weathering and erosion in the area. Figure 6. (a) Three-dimensional view of flatirons, with locations of six points on the dip slope. Field...


Origin of the Rocky Mountain Trench in Southeastern British Columbia by Cenozoic Block Faulting

Thomas L. Thompson

CSPG Bulletin

... to extend infinitely in the direction perpendicular to the profile, the error will minimize the depth of fill. Calculations of theoretical gravity...


Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)

Kristof De Meersman and Marcelo Roizman

Search and

... and the converted wave arrival from the base of the weathering layer. Receiver functions are commonly used in global seismology experiments to infer crustal...


Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)

Kristof De Meersman and Marcelo Roizman

Search and

... and the converted wave arrival from the base of the weathering layer. Receiver functions are commonly used in global seismology experiments to infer crustal...


Paleotopography controls weathering of Cambrian-age profiles beneath the Great Unconformity, St. Francois Mountains, SE Missouri, U.S.A.

Katie J. Pevehouse, Dustin E. Sweet, Branimir Šegvić, Charles C. Monson, Giovanni Zanoni, Stephen Marshak, Melanie A. Barnes, Katie J. Pevehouse, Dustin E. Sweet, Branimir Segvic, Charles C. Monson, Giovanni Zanoni, Stephen Marshak, Melanie A. Barnes

Journal of Sedimentary Research (SEPM)

... the amount of elemental loss or gain during weathering versus depth. Plots use Al as the immobile element, similar to Driese et al. (2007). Negative values...


Siderite Concretions from Nonmarine Shales (Westphalian A) of the Pennines, England: Controls on Their Growth and Composition

Q.J. Fisher , R. Raiswell , J.D. Marshall

Journal of Sedimentary Research (SEPM)

...). These porosity estimates have been combined with shale compaction models, such as those of Baldwin and Butler (1985), to derive an estimate for the depth of cement...


Application of Seismography to Geological Problems

Eugene McDermott

AAPG Bulletin

... alluvial sediments the velocity increases with depth as a result of overburdening. Such a gradual change of velocity has no practical value...


Abstract: Elastic Finite-difference Modeling for Testing Acquisition and Processing Methods; #90187 (2014)

Peter Manning, Joe Wong, and David Henley

Search and

... to statics corrections and migration for imaging the deeper reflectors. Figure 1: A geology model with three weathering pockets near the source point...


Ancient Quartzite Boulders in the Red Valley Area of the Northern Black Hills, South Dakota and Wyoming

William C.B. Gates, Perry H. Rahn

Rocky Mountain Association of Geologists

... virtually unaffected by weathering processes which disintegrate the friable sandstone. Joint bounded quartzite boulders accumulated at the base...


Abstract: Potential of Impact-Structure Plays in Continental Southeast Asia (Paper 9)

H. D. Tjia

Geological Society of Malaysia (GSM)

... density of terrestrial impact craters on the Earth's surface is attributable to reworking by exogenous processes of weathering, erosion, organic activity...


Geomorphology of Reef Complexes: ABSTRACT

Arthur L. Bloom

AAPG Bulletin

... being dissolved away. The permeability of reef frameworks is the major reason for their durability under subaerial tro ical weathering. Although...


The Effect of Mineral Composition on Shale Oil Recovery

Andrew Fakhry, Todd Hoffman

Unconventional Resources Technology Conference (URTEC)

... herein. All information is the responsibility of, and, is subject to corrections by the author(s). Any person or entity that relies on any information...


Model Sensitivity of the Late Ordovician Climate to Atmospheric pCO2

Mark T. Gibbs, Eric J. Barron, Thomas J. Crowley, Lee R. Kump

Pacific Section SEPM

... and Kump, 1994). Here we present calculations of possible Late Ordovician global bicarbonate fluxes from chemical weathering for the different pC02...




Fort Worth Geological Society

...-trace offsets used in velocity calculations need to be equal to the depth of the target. If a reef is at a depth of 5,000 feet, horizontal offset traces...


Discovery of the Cunda Gas Field, Bee Block, North Sumatra: An Integrated Geologic/Seismic Stratigraphic Case History

M. D. Burnaman, R. B. Helm, C. R. Beeman

Indonesian Petroleum Association

... of Base Baong average velocity from north to south amplifies the south structural dip in depth. Overall, the time to depth conversion at the Base Baong...


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