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The AAPG/Datapages Combined Publications Database

Showing 10,235 Results. Searched 200,619 documents.

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Paleomagnetic Methods for Orientation of Borehole Cores, Horizon Cleveland Field, Ochiltree County, Texas: ABSTRACT

William E. Henry

AAPG Bulletin

... component oriented vertically downward that partially overprints the original remanent magnetization direction. This overprint, resulting from...

1982

Genesis of Mississippi Valley-Type Lead and Zinc Ore Deposits and Consequent Exploration Thinking: ABSTRACT

Frank W. Beales

AAPG Bulletin

... of evaporites and/or carbonates either by downward-percolating meteoric waters or by upward-escaping basinal fluids. In a few places, karstic caverns were...

1982

Bahamian Subtidal Stromatolites (Oolitic!): ABSTRACT

Jeffrey J. Dravis

AAPG Bulletin

... cementation increases downward from stromatolite surfaces. Stromatolites themselves are localized on other low-relief oolitic hardgrounds. Morphologies...

1982

Present Thermal State of Western Canada Sedimentary Basin: ABSTRACT

Jacek Majorowicz, Alan M. Jessop

AAPG Bulletin

... and downward fluid flow through much of the Cenozoic and Mesozoic strata seems to be the main influence on heat distribution in the basin. Analyses...

1982

Dolomitization of Pleistocene Reef Sediments by Magnesium Leaching Out of Overlapping Volcanics, Mauritius Island, Indian Ocean: ABSTRACT

Lucien Montaggioni

AAPG Bulletin

... along the core as follows: (1) entirely dolomite 0.5 m downward from the volcanic rock, (2) from 0.5 to 2 m below the base of the basalt, both calcite...

1982

Quartz Hill, Alaska: ABSTRACT

J. Stephens, P. Smith

AAPG Bulletin

... forms a large, tabular to slightly convex downward shape and is at or near the surface. Molybdenite is the only mineral of economic importance. The ore...

1982

Newburg Porous Carbonate Zone of Lockport Group (Middle Silurian), Northeastern Ohio: ABSTRACT

Ronald J. Santini, Alan H. Coogan

AAPG Bulletin

... overall porosity than the rest of the Lockport. The porous dolomite extends downward as much as 80 to 100 ft (25 to 30 m) below the top of the Lockport...

1982

Age of Clay Diagenesis in Oligocene Frio Formation: ABSTRACT

John P. Morton

AAPG Bulletin

... Formation. Rb-Sr isotopic analyses of the less than 0.06 µ fraction indicate that clays within the zone of "hard" geopressure, which extends downward...

1983

Horizontal Compression and a Mechanical Interpretation of Wyoming Foreland Deformation: ABSTRACT

Jay R. Scheevel

AAPG Bulletin

... surface, propagate downward at an approximate 35° dip, and die at a depth dependent upon the magnitude of elastic shortening. Displacement...

1983

Facies and Depositional Environments of Energy Shale Member (Carbondale Formation, Pennsylvanian), Southwestern Jefferson County, Illinois: ABSTRACT

Mitchell K. Burk, John Utgaard

AAPG Bulletin

...%. This increase in sulfur content is attributed to downward percolation of sulfate-rich marine waters of a later transgression through the permeable...

1983

Petrographic, Geochemical, and Paleohydrologic Evidence of Nature of Petroleum Migration in Illinois Basin: ABSTRACT

Craig M. Bethke, J. D. Pruitt, Mary H. Barrows

AAPG Bulletin

... and downward cross-stratigraphic net migration. Compaction-driven and elevation head-driven ground-water flows within the basin were numerically modeled...

1984

Holocene Dolomitization of Supratidal Sediments by Active Tidal Pumping, Sugarloaf Key, Florida: ABSTRACT

Jose D. Carballo, Lynton S. Land

AAPG Bulletin

.... Consequently, seawater is pumped upward and downward through the Holocene sediments during spring tides. The highest concentrations of dolomite...

1984

Seismic Reflection Profiles from Offshore Central California: Evidence for Post-Miocene Imbricate Thrust Faulting: ABSTRACT

James K. Crouch, Steve Bachman

AAPG Bulletin

... in well known foreland thrust belts, these faults typically form an imbricate system in which they curve asymptotically downward to a common basal sole...

1984

Regional Post-Late Miocene Thrust Faulting in Offshore Central California--Implications for Wrench-Style Tectonics: ABSTRACT

James K. Crouch, Steve Bachman

AAPG Bulletin

... in offshore central California. Recognizable on both dip and strike lines, the thrust faults are generally imbricate and curve downward to a basal sole...

1984

Emplacement of Nonevaporitic Sulfates in McKnight Formation, Maverick Basin, and Associated Complex Diagenesis: ABSTRACT

Alonzo D. Jacka

AAPG Bulletin

... have been noted. Nonevaporitic anhydrite layers do not occur below true evaporite deposits, and so downward reflux of sulfate enriched brine cannot...

1984

Interpretation of Underpressuring Using Pressure-Depth Profiles, Palo Duro Basin, Texas: ABSTRACT

E. D. Orr, C. W. Kreitler

AAPG Bulletin

.... Potential upward flow is indicated along the western flanks of the Amarillo uplift, while potential downward flow is indicated in the southwestern...

1984

Structure and Evolution of Some Continental Rifts--Consequences for Their Thermomechanical Behavior: ABSTRACT

P. Y. Chenet, L. Montadert, I. Moretti

AAPG Bulletin

... in the rift trough is characterized by the alternation of rapid downward movements over a period of a few million years and periods of relative stagnation...

1984

Hydrothermal Uranium Vein Deposits in Marysvale Volcanic Field, Utah: ABSTRACT

James D. Rasmussen, Charles G. Cunningham, Thomas A. Steven, Robert O. Rye, Samuel B. Romberger

AAPG Bulletin

... the surface above a concealed rhyolite stock, where they filled high-angle fault zones and flat-lying to concave-downward "pull-apart" fractures. Low pH...

1984

Implications to Exploration of Porosity Relationships and Paragenetic Sequences, Jurassic Navajo (Nugget) Sandstone, Utah and Southwestern Wyoming: ABSTRACT

Kadir Uygur, M. Dane Picard

AAPG Bulletin

... and are correlative in all areas studied. Porosity changes with depth, as well as the volume of cements, are the result of downward-decreasing surface...

1984

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