Error in X-Ray Diffraction Estimates of Dolomite in Carbonate Rocks--Causes and Cures: ABSTRACT

David N. Lumsden

AAPG Bulletin

... the stoichimetry problem, but the [102] quartz peak (2.282A) interferes with the [113] calcite peak (2.282A). Where more than 20% quartz is present...

Environmental Adaptations of Elphidium subarcticum: ABSTRACT

Dorothy J. Echols, Mary Ann Rafle

AAPG Bulletin

... acidized and one that was heavily encrusted and firmly attached on its side to a quartz grain left an internal residue of an organic matrix and a cyst-like...

Field and Experimental Studies of Biogeochemical Processes Governing Diagenesis in and near Reefs, Gulf of Elat, Red Sea: ABSTRACT

Samuel A. Epstein, Gerald M. Friedman

AAPG Bulletin

... detrital quartz grains. The uptake and release of CO2 by photosynthesis and respiration in reef communities cause a shift in the carbonate buffer...

New Method for Determining Paleocurrent Direction: ABSTRACT

Darryl W. Maddox

AAPG Bulletin

... for the optic axes of the quartz grains in the surface. Since the optic axis of a detrital quartz grain is statistically subparallel to its long axis...

Influence of the Pre-Cretaceous Unconformity on Deposition of Lower Mannville Clastic Sequence, Drumheller, Alberta: ABSTRACT

Ellen M. Sonneveld, J. W. Murray

AAPG Bulletin

... by a detrital assemblage consisting of variegated, poorly sorted, cherty rocks. This thick basal quartz sandstone assemblage can be subdivided into a number...

Unusual Calcite Cementing of Quartz Grains on Chandeleur Island Beach, Offshore Louisiana: ABSTRACT

Hugh J. Mitchell-Tapping

AAPG Bulletin

...Unusual Calcite Cementing of Quartz Grains on Chandeleur Island Beach, Offshore Louisiana: ABSTRACT Hugh J. Mitchell-Tapping 1983 1468 1468 67 9...

Sources and Distribution of Late Pleistocene Sand, Northern Gulf of Mexico Shelf: ABSTRACT

J. M. Mazzullo, C. Bates, D. Reutter, K. Withers

AAPG Bulletin

... from different source terranes on the basis of the shapes of quartz sand grains), mineralogic analysis (which identified the composition of the source...

Recognition of Paleosilcretes: Example from North Texas: ABSTRACT

Robert C. Murray

AAPG Bulletin

... widespread and topographically prominant. The rock is a quartz and chert-pebble conglomerate with a variety of silica cements. It is recognized...

Geology of Puryear Member of Upper Morrow Formation at Cheyenne Field, Roger Mills County, Oklahoma: ABSTRACT

Daniel L. Willingham

AAPG Bulletin

.... The Puryear sandstone, a quartz sandstone and chert conglomerate, is the major depositional cycle in an overall regressive upper Morrow sandstone-shale...

Sources of Pleistocene and Holocene Sand for Northeast Gulf of Mexico Shelf and Mississippi Fan: ABSTRACT

Jim Mazzullo, Charles Bates

AAPG Bulletin

... province, characterized by spherical quartz grains derived from older strata in the drainage basin of the Mississippi River, and the eastern Gulf...

Setting of Early Ordovician (Arenigian) Carbonate Sedimentation in Appalachian Basin: Arid Climatic Epicontinental Seas Interrupted by Intermittent Conditions of Emergence: ABSTRACT

Gerald M. Friedman

AAPG Bulletin

..., or siliceous pseudomorphs of former anhydrite nodules; calcite and euhedral quartz infilling solution-enhanced vugs after evaporite nodules; carbonate...

Petrofacies and Chert-Effect on Provenance Interpretation for Mahatta Humaid Group (Amin and Miqrat Formations) in Huqf Outcrops, Oman

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ABSTRACT: Development of fold hinges in a quartz arenite at subgreenschist facies conditions; #90018 (2003)

Jennie Cook

Search and Discovery.com

...ABSTRACT: Development of fold hinges in a quartz arenite at subgreenschist facies conditions; #90018 (2003) Jennie Cook AAPG Search and Discovery...

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user

Search and Discovery.com

...user Chemostratigraphy as an Exploration Tool in Low-Accommodation Incised Valley Systems; An Example From the Lower Cretaceous Basal Quartz...

Abstract: NMR analysis of a bimodal pre-Khuff clastic pore system; #90254 (2016)

Andrea Valori, David Forsyth, Gabor Hursan, Wael Abdallah

Search and Discovery.com

... prolific gas intervals are characterized from core studies as clean quartz with very low clay content and excellent reservoir quality. Yet, unexpectedly...

Deep Cotton Valley Formation Diagenesis and Reservoir Quality, Viosca Knoll Area, Offshore Gulf Of Mexico, by Andrew Thomas, David Balcer, Tom Himes, Linda Bonnell, Jessy Jones, Larry O’Mahoney, #90027 (2004)

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Diagenesis of the Mt. Simon and Rose Run Sandstones in Western West Virginia and Southern Ohio

M. T. Heald, G. F. Baker

Journal of Sedimentary Research (SEPM)

... typically ranged from 3 to 9% and significantly reduced porosity in many samples. Quartz cement was much less common ranging generally from I to 3%, although...

Geochemical Evidence for a Temporal Control on Sandstone Cementation: Chapter 3: CONTRAINTS ON DIAGENETIC PROCESSES

J. G. Gluyas, S. M. Grant , A. G. Robinson

AAPG Special Volumes

..., Haltenbanken, the homogenization temperatures of primary fluid inclusions in quartz cement are correlated with depth over the entire basin. The inclusions...

Cements: PART 1

AAPG Special Volumes

... Ricker Ss. Mbr. of Mineral Wells Fm. Texas. An early to intermediate stage of quartz overgrowth cementation. The detrital quartz grains have well...

Sandstone diagenesis and reservoir quality prediction: Models, myths, and reality

Thomas R. Taylor, Melvyn R. Giles, Lori A. Hathon, Timothy N. Diggs, Neil R. Braunsdorf, Gino V. Birbiglia, Mark G. Kittridge, Calum I. Macaulay, Irene S. Espejo

AAPG Bulletin

... sandstones. Calibrated numerical models that simulate compaction and quartz cementation, when linked to basin models, have proven successful in predicting...

The Pre-Cambrian Rocks North of Hanna Basin, Carbon County, Wyoming

Tommy L. Finnell

Wyoming Geological Association

... are: (1) basic dikes, (2) pegmatite and aplite dikes, (3) quartz veins, (4) epidotized granites, (5) hornblende schists, (6) granite gneisses, and (7...

Compaction and Cementation of Sand Under Conditions Simulating Deep Burial

John C. Maxwell

Tulsa Geological Society

...., "Experiments Bearing on the Orientation of Quartz in Deformed Rocks;" Bull, G. S. A., vol. 49, p. 1723-1746, 1938. The mechanism of compaction...

Effects of Depositional and Authigenic Clays on Porosity Development, Atoka Formation, White Oak Field, Arkoma Basin

C. Dianne Phillips, Doy L. Zachry

Tulsa Geological Society

... pressure solution and quartz cementation during compaction. Authigenic chlorite reduces existing primary and secondary porosity in porous zones...

A Further Note to the Wing Sang Cheong Tin Mine, Ipoh, Perak - Observations of Tin Mineralization along a New Road Cutting

P. C. Aw

Geological Society of Malaysia (GSM)

... are lined with black tourmaline veins. The granite consists mainly of quartz, microc1ine-perthite, plagioclase and biotite. Perthite displays a variable...

Lithofacies Prediction and 3-D Geological Model in Tight Gas Sandstone Reservoirs by Integration of Well Logs and Geostatistics Modeling; #51525 (2018)

Binfeng Cao, Xiaorong Luo, Likuan Zhang, Yuhong Lei, Bo Qin, Zhenyu Zhang

Search and Discovery.com

... using well logs. Five lithofacies are defined based on detrital texture and composition, diagenetic features, and pore space properties. Detrital quartz...