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The AAPG/Datapages Combined Publications Database
Showing 675 Results. Searched 200,756 documents.
Differential Mobility of Elements in Burial Diagenesis of Siliciclastic Rocks
Robert P. Wintsch, Cindy M. Kvale
Journal of Sedimentary Research (SEPM)
... of the Ca/Mg ratio of pore fluids, implying a composition buffered by Ca- and Mg-bearing minerals (Land et al. 1988). If dissolution of calcite locally...
1994
Two-Phase Diagenesis of Quaternary Carbonates, Arabian Gulf: Insights from 13C and 18O Data
Henry S. Chafetz, Patrick F. Rush
Journal of Sedimentary Research (SEPM)
.... 1992). Thus, the lower 13C values of the samples from dLMC, relative to the aragonitic samples, are the result of rock-buffered mineralogic...
1995
Authigenic Quartz Microfabrics in Cretaceous Turbidites: Evidence for Silica Transformation Processes in Sandstones
James P. Hendry , Nigel H. Trewin
Journal of Sedimentary Research (SEPM)
... rates of opal-A dissolution and opal-CT nucleation govern the extent to which silica activity is buffered near Point 2 in Figure 9, and therefore the net...
1995
Authigenic Feldspar as an Indicator of Paleo-Rock/Water Interactions in Permian Carbonates of the Northern Calcareous Alps, Austria
Christoph Spotl , Martin Kralik , Michael J. Kunk
Journal of Sedimentary Research (SEPM)
... 152 to 140 Ma, assuming that the burial diagenetic regime was buffered with respect to strontium by the associated marine Permian evaporites...
1996
Diagenesis of an Upper Devonian Carbonate-Evaporite Sequence: Birdbear Formation, Southern Interior Plains, Canada
Steve G. Whittaker , Eric W. Mountjoy
Journal of Sedimentary Research (SEPM)
... have argued that the O isotopic composition of seawater is buffered against major variations from its present value (Muehlenbachs and Clayton 1976...
1996
Diagenetic Mineralogy, Geochemistry, and Dynamics of Mesozoic Arkoses, Hartford Rift Basin, Connecticut, U.S.A.
Enrique Merino , Jean-Pierre Girard , Michael T. May , Vishnu Ranganathan
Journal of Sedimentary Research (SEPM)
... between 150°C and 400°C and if silica activity is buffered by quartz, not by amorphous silica. Of course, since quartz did precipitate (as chert...
1997
The Significance of Hiatus Beds in Shallow-Water Mudstones: An Example from the Middle Jurassic of Switzerland
Andreas Wetzel, Vincenzo Allia
Journal of Sedimentary Research (SEPM)
... into the overlying seawater and/or precipitation of Fe sulfide provides additional H+ (Fig. 11); the excess H+ is buffered by dissolution of carbonate...
2000
Estimation of Duration of Subaerial Exposure in Shallow-Marine Limestones--an Isotopic Approach
Wan Yang
Journal of Sedimentary Research (SEPM)
... equilibration of s13C to the water-buffered system. Two major assumptions are applied in this method. First, carbon isotopic equilibrium between...
2001
On the Origin and Significance of Pyrite Spheres in Devonian Black Shales of North America
Jurgen Schieber , Gordon Baird
Journal of Sedimentary Research (SEPM)
... "buffered" by the reactive iron content of the sediment (Canfield and Raiswell 1991; Canfield et al. 1992), or alternatively it could have been...
2001
Development of Magnesian Carbonates in Quaternary Soils on the Island of Hawaii
Charles E. Whipkey,, Rosemary C. Capo, Jean C.C. Hsieh, Oliver A. Chadwick
Journal of Sedimentary Research (SEPM)
... samples were first leached with a buffered ammonium (NH4) acetate or NH4-chloride-methanol solution (after Jackson 1975) to remove soluble salts...
2002
Geochemical and Sedimentologic Problems of Uranium Deposits of Texas Gulf Coastal Plain
Wen H. Huang
AAPG Bulletin
... had been buffered to higher pH during the course of migration. Although no experimental data are available on leaching by complexing organic acids...
1978
Diagenetic Evolution of Cretaceous-Tertiary Turbidite Reservoirs, Campos Basin, Brazil
Marco A. S. Moraes
AAPG Bulletin
... carbonate precipitation because the pH is buffered by the latter (Surdam and Crossey, 1985). The organic acids, especially the dicarboxylic acids...
1989
Secondary Porosity Revisited: The Chemistry of Feldspar Dissolution by Carboxylic Acids and Anions (1)
RONALD K. STOESSELL and EDWARD D. PITTMAN
AAPG Bulletin
... their experiments in pH-buffered solutions and actually detected a decrease in dissolution rates at pH 1 with oxalic acid relative to HCl solutions...
1990
Diagenetic alterations in Eocene, deeply buried volcaniclastic sandstones with implications for reservoir quality in the Huizhou depression, Pearl River Mouth Basin, China
Benben Ma, Jiachen Gao, Kenneth A. Eriksson, Hongtao Zhu, Qianghu Liu, Xianquan Ping, and Zhang Yang
AAPG Bulletin
... filling) and temporal and spatial distribution patterns of diagenetic minerals are sensitively buffered by the geochemistry of the reservoir system...
2023
Demonstration of Sequestration of Carbon Dioxide in a Simulated Coalbed through Injection of Dissolved Gas
John M. Pope, Wade A. Bard, Grant A. Myers
Carbon Capture, Utilization and Storage (CCUS)
... presence of methane sorbed to the coal prior to injection. In other future work, we will investigate the potential use of buffered solutions...
2024
STRATIGRAPHY AND MINERALOGY OF THE UNARE AREA, EASTERN VENEZUELA
Peter W. Taylor
Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)
... cemented, the pressure between adjacent grains is buffered by the cement, see Plate II, Figure 1. Consequently, the degree of pressure welding...
1962
A GIS Test of Two Models for the Distribution of Tertiary Epithermal Ore Deposits in Colorado
Vincent Matthews, Matthew L. Morgan
Rocky Mountain Association of Geologists
... into Proterozoic metamorphic rocks. This combined polygon was buffered by one mi. in order to take into account ore fluids that came up through the metamorphic rocks...
2012
Planktonic Foraminifera in Baffin Bay, Davis Strait and the Labrador Sea
Charles F. Stehman
Atlantic Geology
... in the centre of the net opening. Collections were: preserved in a 15% formaldehyde solution buffered with hexamethylene tetramine. In the laboratory...
1972
Did a volcanic mega-eruption cause global cooling during the Late Ordovician?
Achim D. Herrmann, Kenneth G. Macleod, Stephen A. Leslie
PALAIOS
... that Earth’s climate system is buffered against major reorganization due to forced shortterm perturbations like volcanic mega-eruptions. This conclusion...
2010
Glomalin, a newly discovered component of soil organic matter: Part IIRelationship with soil properties
M. J. Haddad, D. Sarkar
Environmental Geosciences (DEG)
.... Phosphate-buffered saline (PBS) was used to dilute the plate wells to the final volume of 250 L. All samples were compared to a known curve using...
2003
Resource Development/Utilization: Uranium In-Situ Leaching in the Tertiary Deposits of South Texas
Geoffry G. Hunkin
Houston Geological Society
.... The higher TDS values generated by the oxidation activities of uranium leaching will be rapidly buffered and diluted so as to become indistinguishable...
1977
Benthonic Foraminifera from Lahave Estuary
Ralph Allen, Robert S. Roda
Atlantic Geology
... to remove the wood and shell fragments and a 63-y sieve to retain the foraminifera and sand. The 63-y fraction was treated with buffered formalin and Rose...
1977
The Chemistry of Lateritic Soils: The Search for New Agricultural Technology
B. I. Kronberg, W. S. Fyfe, J. Walden, D. B. Walden
Geological Society of Malaysia (GSM)
... 65.9 0 22.7 72.7 61.4 47.7 95.5 68.2 70.5 85.2 ‘ These more soluble phosphate fertilizers are not effective on poorly buffered soils. C hem istry Ex...
1986
Metal attenuation processes in a landfill containing coal combustion waste: Implications for remediation
Christopher Barton, Lindy Paddock, Christopher Romanek, Sally Maharaj, John Seaman
Environmental Geosciences (DEG)
... may precipitate from acid sulfate solutions when buffered to a relatively high pH by carbonate materials; however, a pH near 5.0 must be achieved...
2005
Foraminiferal Distribution in Two Nova Scotia Marshes
B. Deonarine
Atlantic Geology
... a 0.062 mm screen. Samples were then fixed in 10% buffered formalin and stained with Rose Bengal. After washing, the foraminiferal samples were stored...
1979