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The AAPG/Datapages Combined Publications Database

Showing 22,489 Results. Searched 200,616 documents.

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Structure and Morphogenesis of Microstromatolites from the Transvaal Supergroup, South Africa

William P. Lanier

Journal of Sedimentary Research (SEPM)

.... This study documents a new "microstromatolite" assemblage from carbonate-replacement black chert of the 2.3 Ga Transvaal Supergroup, South Africa...

1988

Capturing Interwell Scale Heterogeneity from Process-Based Modelling for Reservoir Flow Simulations: A Study of the Middle Triassic Latemar Platform, Dolomites, North Italy; #40793 (2011)

Graham Felce, Fiona Whitaker, Gregory Benson, and Tom Leadbeater

Search and Discovery.com

... synthetic platforms and evaluate approaches to layer aggregation. CARB3D+ simulations of the Latemar platform successfully replicate the 3D distribution...

2011

Permeability of upper Wolfcamp lithofacies in the Delaware Basin: The role of stratigraphic heterogeneity in the production of unconventional reservoirs

Sebastian Ramiro-Ramirez, Athma R. Bhandari, Robert M. Reed, and Peter B. Flemings

AAPG Bulletin

... flow model to examine the role of high-permeability layers in drainage at the completion scale. Flow is focused through the permeable layer, resulting...

2024

Origin of Satin Spar Veins in Evaporite Basins

Thomas C. Gustavson, Susan D. Hovorka, Alan R. Dutton

Journal of Sedimentary Research (SEPM)

... of satin spar fibers (Fig. 2). Three stages of deformation are envisioned as a layer of salt undergoes horizontal dissolution beneath jointed sedimentary...

1994

Eggshell Fragments from the Jurassic Morrison Formation of Colorado

Karl F. Hirsch, Robert G. Young, Harley J. Armstrong

Grand Junction Geological Society

...:173–182. Bruni, S.F., and Wenk, H.-R., 1985, Replacement of aragonite by calcite in sediments from the San Cassiano Formation (Italy): Journal...

1987

Organic and Inorganic Constituents of the Niobrara Formation in Weld County, Colorado

William F. Precht, Richard M. Pollastro

Special Publications of SEPM

... and pyrite replacement within burrows (Owt Creek No. 13, 7079'). (c) Disconformabte contact between Fort Hays Limestone above Codett Sandstone Member...

1985

Ecological Changes in a Massive Fresh-Water Clay Sequence

J. M. Coleman

GCAGS Transactions

... foot layer of swamp clays. Large carbonate and iron concretions, finely disseminated iron cement, and replacement of organic fragments by iron oxides...

1966

Base-Metal Concentration in a Density-Stratified Evaporite Pan

P. Sonnenfeld , P. P. Hudec , A. Turek , J. A. Boon

AAPG Special Volumes

... by occasional storms provide an upper layer of low-salinity water. Because of the high density of the brine, seawater is considered not to percolate...

1977

Fracture-Porosity Identification from Anisotropy AVO and Fluid Substitution Modelling in Seismic 2D Data

Septian Prahastudhi, Tenny Octaviani, Ayi Syaeful Bahri, Yulia Putri Wulandari

Indonesian Petroleum Association

... properties of crack (D) and anisotropy gradient (Gan). The crack properties can be computed after fluid replacement modeling using Gassmann Equation to find...

2012

Seismic Imaging in Anisotropic Media. or... "A Better Way to Moveout and Migrate Long Offset Data"

Rolf Klotz, Martin Bayly, Sue Downie, Swee Leng

Indonesian Petroleum Association

... velocity varying from layer to layer. When seismic energy propagates through these layers at a non normal angle it obeys Snell's Law and therefore...

2000

Feldspathized Shales from Minnesota

Malcolm P. Weiss

Journal of Sedimentary Research (SEPM)

... mica, 3; collophane. 2; detrital (?) feldspar. 1: calcite. 1; and limonite, 1 percent. Both the collophane and calcite locally show partial replacement...

1954

A Quantitative Model for Salt Deposition in Actively Spreading Basins; #30117 (2010)

Bernard Montaron and Paul Tapponnier

Search and Discovery.com

... on seismic measurements of evaporite layer thicknesses, basin geometry and plate separation rate. We discuss results concerning the main salt deposits...

2010

Climatic Influence on Fountain Sedimentation in the Manitou Embayment

Lee J. Suttner

Rocky Mountain Section (SEPM)

... is kaolinite; chlorite, smectite, (including mixed-layer varieties) and illite are subordinate and quartz, various carbonate minerals and iron oxides...

1984

Petrology of the Post-St. Peter Ordovician, Northern Arkansas

Tom Freeman

Tulsa Geological Society

... within interrhomb secondary pores. The dolomite is clearly authigenic as evidenced by its partial replacement of fossils (Fig. 1). Freeman (1965) argued...

1966

New Evidence Concerning Age of Spavinaw Granite, Oklahoma: GEOLOGICAL NOTES

W. E. Ham , R. H. Dott

AAPG Bulletin

... crystal form, are found locally coating solution pockets, as a filling in brecciated beds, in thin veins, and as irregular replacement bodies of small size...

1943

Stratigraphy and Petrology of the Morrison Formation (Jurassic) of the Canon City, Colorado, Area

Lawrence L. Brady

Journal of Sedimentary Research (SEPM)

... be observed in several thin sections (fig. 4B). In several thin sections there is staining and replacement of the calcite by hematite in some areas...

1969

Limestone Conglomerates (Recent and Cretaceous) in Southern Florida: GEOLOGICAL NOTES

Joseph E. Banks

AAPG Bulletin

... the ostracods. Below this layer of sand is more loose gravel. It is easy to see in cross section that the sediment on top of Molasses reef has peak...

1959

Detrital Grains: Rock Fragments

AAPG Special Volumes

... filling or replacement fabric in sedimentary rocks. Here the chalcedony is surrounded by carbonate cement crystals. As with cherts, a wide variety...

1979

Secondary Ferroan Dolomite Rhombs in Oil Reservoirs, Chadra Sands, Gialo Field, Libya: GEOLOGIC NOTES

Zuhair Al-Shaieb, John W. Shelton

AAPG Bulletin

... is present as patchy replacement of glauconite and fossil fragments. Phosphate is present as nodules, shark teeth, bone, and Lingula fragments. Clay...

1978

Diagenesis, Reservoir Quality, and Production Trends of Doig Formation Sand Bodies in the Peace River Area of Western Canada

Richard G. Harris, R. Marc Bustin

CSPG Bulletin

... to identify in the majority of samples. The characteristic fibrous and two-layer inner structure of individual bioclasts, and the shape and packing...

2000

Petrography and Diagenesis of Cherts From Lake Magadi, Kenya

Kathryn A. Schubel , Bruce M. Simonson

Journal of Sedimentary Research (SEPM)

... to the presence of 10-20 µm spherical aggregates of plate-like crystals. This pseudomorphing implies direct volume-for-volume replacement of magadiite by quartz...

1990

Intracrystalline Alteration of Low-Magnesian Calcite Cement in the Devonian Pillara Formation, Canning Basin, Western Australia

Vicki A. Pedone , J. A. D. Dickson , William J. Meyers

Journal of Sedimentary Research (SEPM)

... Geologists, v. 75, p. 1018-1038. WARD, W.B., 1995, Multiple replacement of calcite by calcite in the Wolfcampian Laborcita Fm., Sacramento Mountains...

1994

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