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The AAPG/Datapages Combined Publications Database
Showing 675 Results. Searched 200,636 documents.
Chapter 19 - Diagenesis: Dissolution
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
... localized diffusive transport of solutes dominates because pore waters are buffered by rock-water interactions and geochemical gradients are low...
2014
Significance of Authigenic K-feldspar in Cambrian-Ordovician Carbonate Rocks of the Proto-atlantic Shelf In North America
M. Raymond Buyce , Gerald M. Friedman
Journal of Sedimentary Research (SEPM)
... and then feldspar. In New York State the waters affecting the tuff beds could have been of lower pH (buffered to 8 or below) causing montmorillonite to form...
1975
Stratal Geometries and Patterns of Platform Carbonates: The Cretaceous of Oman
Henk Droste, Mia Van Steenwinkel
AAPG Special Volumes
... in the Berriasian to Hauterivian indicates that the third-order sea level rises were buffered by the overall, second-order regressive trend. Carbonate production...
2004
Sedimentary Facies Analysis and Strontium-Isotope Stratigraphy of the Hillbank and Yalbac Formations, Corozal Basin, Belize
Karena K. Gill, David T. King, Jr., Haibo Zou, Fay Smith
GCAGS Transactions
... and upper mantle sources, as moderated and buffered by carbonate recycling (Elderfield, 1986). Because of these fluctuations, the marine strontium-isotope...
2018
Laminated Algal Mats from a Coastal Lagoon, Laguna Mormona, Baja California, Mexico
Robert J. Horodyski , Bonnie Bloeser, Stephen Vonder Haar
Journal of Sedimentary Research (SEPM)
... is controlled primarily by oceanic tides, fluctuations of the water table are buffered by the slow rate of percolation through the barrier dunes...
1977
A Geochemical Study of Dolomite in the Monterey Formation, California
Stephen J. Burns, Paul A. Baker
Journal of Sedimentary Research (SEPM)
... in acetic acid buffered with ammonium acetate (pH = 5) for 30 minutes. This treatment removed all the calcite and only a small fraction of the dolomite...
1987
Diagenesis of Iron in Proglacial Sand Deposits of Late- and Post-Weichselian Age
Dieke Postma, B. Sine Brockenhuus-Schack
Journal of Sedimentary Research (SEPM)
..., R., 1967, Kinetics of the alteration of K-feldspar in buffered solutions at low temperature: Geochim. Cosmochim. Acta, v. 31, p. 635-648. End...
1987
Geochemistry of Early Carbonate Cements in the Cardium Formation, Central Alberta
Steven D. Machemer, Ian Hutcheon
Journal of Sedimentary Research (SEPM)
... that the pH of the fluid was buffered by organic debris or mineral assemblages and thereby remained constant. The assumption of relatively constant pH...
1988
Diagenesis of Late Proterozoic Carbonates: The Beck Spring Dolomite of Eastern California
William G. Zempolich , Bruce H. Wilkinson, Kyger C Lohmann
Journal of Sedimentary Research (SEPM)
... and relatively invariant depleted 13C values, in fact, may record precipitation at shallow burial depth, from a rock-buffered fluid, over a small...
1988
Albitization of Detrital Plagioclase in Triassic Reservoir Sandstones from the Snorre Field, Norwegian North Sea
Sadoon Morad, Morten Bergan, Ragnar Knarud, Johan Petter Nystuen
Journal of Sedimentary Research (SEPM)
..., solubility of calcite depends on PCO2 and imbalance between the carbonate and carboxylic systems and that pH of oil-field waters is buffered...
1990
Authigenic Barite as an Indicator of Fluid Movement through Sandstones Within the Colorado Plateau
George N. Breit, Martin B. Goldhaber, Daniel R. Shawe, E. Craig Simmons
Journal of Sedimentary Research (SEPM)
.... Furthermore, this ratio would be buffered to low values by the large reservoir of strontium in gypsum and anhydrite in the evaporites. Similar...
1990
Mechanisms of Quartz Cementation in North Sea Reservoir Sandstones: Constraints From Fluid Compositions: Chapter 2: CONSTRAINTS ON DIAGENETIC PROCESSES
Andrew C. Aplin, Edward A. Warren, Shona M. Grant , Andrew G. Robinson
AAPG Special Volumes
... or amorphous silica (e.g. sponge spicules) or in mudstones with more varied mineral asssemblages. Here, silica could be buffered above quartz saturation...
1993
Diagenesis of Skeletal and Nonskeletal Components of Mid-cretaceous Limestones
Kyung-sik Woo , Thomas F. Anderson, Philip A. Sandberg
Journal of Sedimentary Research (SEPM)
... and a small negative shift in 18O. The (closed) diagenetic system was effectively buffered by the primary calcite, perhaps in types of microdiagenetic...
1993
Marine, Burial, and Meteoric Diagenesis of Early Silurian Carbonate Ramps, Quebec Appalachians, Canada
D. Lavoie , P.-A. Bourque
Journal of Sedimentary Research (SEPM)
... buffered rock system. The first hypothesis is rejected because of the unlikely formation of a gigantic mixed-water system needed to explain the regional...
1993
Shallow Burial Dolomitization and Dedolomitization of Mid-Cenozoic, Cool-Water, Calcitic, Deep-Self Limestones, Southern Australia
Noel P. James , Yvonne Bone , T. Kurtis Kyser
Journal of Sedimentary Research (SEPM)
... and the waters would have been buffered by passage through the carbonates. In summary, it appears that the poorly ordered, Ca-rich dolomites were more soluble...
1993
Interpretation of Methanic Diagenesis in Ancient Sediments by Analogy with Processes in Modern Diagenetic Environments: Part 1. Concepts and Principles
Donald L. Gautier, George E. Claypool
AAPG Special Volumes
... (albeit slow) precipitation of iron sulfides within the entire sulfate-reduction zone, the concentration of iron in solution is buffered to very low...
1984
Distribution of Holocene Benthonic Foraminifera on the Belize Shelf
Kenneth F. Wantland
AAPG Special Volumes
... and preserved in buffered formalin and seawater (see Aves, 1958, and Phleger, 1960c, for discussion of preservation techniques). In deeper areas, bottom...
1975
Ordovician Ophicalcites of Southern Quebec Appalachians: A Proposed Early Seafloor Tectonosedimentary and Hydrothermal Origin
Denis Lavoie , Pierre A. Cousineau
Journal of Sedimentary Research (SEPM)
... HCO3-. The carbon content of water is low, and any significant input of isotopically different bicarbonate could have buffered the isotopic signature...
1995
Early Diagenetic Minerals and Variables Influencing their Distributions in Two Long Cores (> 40 m), Mississippi River Delta Plain
A.M. Bailey , H.H. Roberts , J.H. Blackson
Journal of Sedimentary Research (SEPM)
... porewater salts and exchangeable cations and then with buffered acetic acid to remove calcite. They were then extracted with 0.1N HCl to dissolve...
1998
A Late Cambrian Positive Carbon-Isotope Excursion in the Southern Appalachians: Relation to Biostratigraphy, Sequence Stratigraphy, Environments of Deposition, and Diagenesis
Bosiljka Glumac , Kenneth R. Walker
Journal of Sedimentary Research (SEPM)
... diagenesis or may reflect later burial alteration. During diagenetic modification, the 13C value for fibrous to bladed calcite was buffered to the host...
1998
The Origin of Dolomites in Tertiary Sediments from the Margin of Great Bahama Bank
Peter K. Swart , Leslie A. Melim
Journal of Sedimentary Research (SEPM)
... to isolate the dolomite contained in the samples, selected sieved samples with greater than 5% dolomite (>63 µm) were treated with buffered acetic acid...
2000
Petrography and Geochemistry of Floodplain Limestones from the Clarks Fork Basin, Wyoming, U.S.A.: Carbonate Deposition and Fossil Accumulation on a Paleocene-Eocene Floodplain
Gabriel J. Bowen,, Jonathan I. Bloch
Journal of Sedimentary Research (SEPM)
... ultraviolet radiation and wet-dry cycles. Furthermore, fossils buried in micrite would be chemically buffered against acidic soil waters, which are common...
2002
13C-Enriched Carbonate in Mississippian Mud Mounds: Alamogordo Member, Lake Valley Formation, Sacramento Mountains, New Mexico, U.S.A.
Yongqiang Wu, Henry S. Chafetz
Journal of Sedimentary Research (SEPM)
... of carbonates equilibrate more rapidly with diagenetic fluids than the rock-buffered carbon isotopic compositions. If diagenesis occurs at low water/rock...
2002
CambrianOrdovician Knox Carbonate Section as Integrated Reservoirs and Seals for Carbon Sequestration in the Eastern Mid-continent United States
Stephen F. Greb, D. C. Harris, M. P. Solis, W. H. Anderson, J. A. Drahovzal, B. C. Nuttall R. A. Riley, W. Solano-Acosta, J. A. Rupp, Neeraj Gupta
AAPG Special Volumes
...). In carbonate reservoirs like the Knox, this decrease in pH should be temporary because the acidic solution will be buffered by dissolution of calcite...
2009
Micro-Sized Dolomite Inclusions in Ferroan Calcite Cements Developed During Burial Diagenesis of Kimmeridgian Reefs, Northern Iberian Basin, Spain
M. Isabel Benito, Kyger C. Lohmann, Ramon Mas
Journal of Sedimentary Research (SEPM)
... rock values (i.e., in a rock-buffered system with respect to carbon), while a pattern of progressive decrease of δ18O values within the burial cements...
2006