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Depositional environments of Katakturuk Dolomite and Nanook Limestone, Arctic National Wildlife Refuge, Alaska

Conference ·
OSTI ID:6683146
; ; ;
The Katakturuk Dolomite (Proterozoic) and the unconformably overlying Nanook Limestone (Proterozoic. to Devonian) are considered to have the best hydrocarbon reservoir potential of the pre-Mississippian basement complex rocks in the coastal plain subsurface of the Arctic National Wildlife Refuge, Alaska. Where well exposed in the Sadlerochit and Shublik Mountains to the south, these formations display a wide range of basin to shelf carbonate depositional environments. The lower part of the Katakturuk Dolomite consists of debris-flow doliomitic megabreccias and dolomitic to lime mudstone turbidites deposited in a deep-water slope to basin-plain setting. A transition from basin to shelf environments upsection is marked by the presence of ooids (derived from active shelf margin shoals) in turbidites, debris flows, and grain flows. These grade upward into shallow water, crossbedded oolitic and algal grainstones, with intermittent zones of subtidal stromatolites, and culminate in intertidal to supratidal facies containing numerous stromatolite forms, cryptalgal laminate, mudcracks, miscrospeleotherms, and collapse breccias.
OSTI ID:
6683146
Report Number(s):
CONF-880301-
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ALASKA
ALKALINE EARTH METAL COMPOUNDS
BASEMENT ROCK
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CAMBRIAN PERIOD
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
DEVONIAN PERIOD
DOLOMITE
EVALUATION
EXPLORATION
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALOGY
MINERALS
NATURAL GAS DEPOSITS
NATURE RESERVES
NORTH AMERICA
ORDOVICIAN PERIOD
OXYGEN COMPOUNDS
PALEONTOLOGY
PALEOZOIC ERA
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
ROCKS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SEDIMENTATION
USA