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Welcome to the new Datapages Archives

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The AAPG/Datapages Combined Publications Database

Showing 16,781 Results. Searched 196,121 documents.

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Vitrinite Reflectance of Coals from the Heath Formation, Central Montana: ABSTRACT

John A. Daniel, Gary A. Cole

AAPG Bulletin

... of heating undergone by the organic constituents. Reflectance values show a regional trend caused by burial and the geothermal gradient. Little...

1983

Estimation of Sediment Compaction Profiles Using Combination of Real-Time Drilling Response Modeling and Direct Porosity Measurements: ABSTRACT

John D. MacPherson, E. Nigh, Alun Whittaker

AAPG Bulletin

... the maximum value attained by the formation pore pressure is controlled by the overlying fracture gradient (hence, an on-line fracture gradient allows...

1984

Structural Evolution of Val Verde Basin, West Texas: ABSTRACT

David E. Sanders, Neil Petersen

AAPG Bulletin

... greater than 4.5% Ro. The most southerly wells also have reflectance depth trends which show a break in gradient within Wolfcamp sediments (9,000-10,000...

1984

Late Cenozoic History of Safford-San Simon and Bonita Creek Structural Basins, Graham County, Arizona: ABSTRACT

B. B. Houser

AAPG Bulletin

... beds interbedded with deposits of low-gradient alluvial fan covering 730 km2 (280 mi2) from its apex at the mouth of Bonita Creek, southwestward...

1984

High Fluid-Inclusion Homogenization Temperatures in Carbonates of Lower Ordovician Beekmantown Group in Northern Appalachian Basin: ABSTRACT

Stephen F. Urschel, Gerald M. Friedman

AAPG Bulletin

.... This difference may reflect a higher post-Early Ordovician paleogeothermal gradient operative in eastern New York. Drusy calcite cements in samples...

1984

Carbonate-Cement Stratigraphy of Burlington Limestone (Osagean) of Iowa: Evidence for Eh Gradients in a Regional Mississippian Paleogroundwater System: ABSTRACT

David C. Harris, William J. Meyers

AAPG Bulletin

... grainstones from the Burlington Limestone reveals compositional zoning, which suggests that a chemical gradient was effective during cementation...

1985

Thermal Maturity of Bowie Coals in Southern Portion of Piceance Basin, Colorado: ABSTRACT

R. D. Merry, V. E. Larsen

AAPG Bulletin

... with a geothermal gradient map, most of the positive Ro residuals correlated with "hot spots" that were related to known igneous intrusives. Some anomalous hot...

1985

Regional Organic Geochemistry of Offshore Louisiana: ABSTRACT

Clifford C. Walters, Mary Rose Cassa

AAPG Bulletin

... geothermal gradient. Mod l calculations of thermal maturity, used in conjunction with burial history analysis, are consistent with our empirical observations...

1985

Heat Flow and Thermal History of the Anadarko Basin, Oklahoma

Larry S. Carter, Shari A. Kelley, David D. Blackwell, and Nancy D. Naeser

AAPG Bulletin

... shale section to the north. The geothermal gradient in the low-conductivity shale section is elevated relative to the geothermal gradient in the high...

1998

Facies Architecture and Sequence Stratigraphy of Fine-Grained Lacustrine Deltas Along the Eastern Margin of Late Pleistocene Lake Bonneville, Northern Utah and Southern Idaho

David R. Lemons and Marjorie A. Chan

AAPG Bulletin

... in a relatively isolated northeast arm of the lake, records both fluvial and wave processes. These fine-grained deltas were fed by low-gradient rivers...

1999

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