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Stratigraphic and structural framework of ellesmerian and older sequences in Sadlerochit and Shublik Mountains, Arctic National Wildlife Refuge (ANWR), northeastern Alaska

Conference ·
OSTI ID:5992405
; ; ;
Detailed geological mapping (1:25,000 scale) and stratigraphic reconstructions in the Sadlerochit and Shublik Mountains of northeastern Alaska, immediately south of the ANWR coastal plain, indicate a compressive structural province dominated by major thrust-ramp-related anticlinal uplifts. The Katakturuk Dolomite, a Proterozoic sequence, has been subdivided into 15 lithostratigraphic units that can be traced the entire length of both the Sadlerochit and Shublik Mountains. Overlying the Katakturuk Dolomite in these ranges in the Middle Devonian to Cambrian or older Nanook Limestone. In the Early Mississippian a major erosional event produced the pre-Mississippian unconformity upon which a Mississippian through Triassic sequence was deposited: Kayak Shale; Lisburne Group carbonates; and Sadlerochit Group clastic rocks. In the northern Sadlerochit Mountains, basal units of the Mississippian Alapah Limestone lie on the pre-Mississippian unconformity with no intervening Kayak Shale. The basal Alapah contains lithologies derived from the rock units on which it rests, indicating that the contact between the Alapah and the underlying units is depositional.
OSTI ID:
5992405
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
ALASKA
ALKALINE EARTH METAL COMPOUNDS
ARCTIC REGIONS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
DOLOMITE
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGY
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MAPPING
MESOZOIC ERA
MINERALS
MISSISSIPPIAN PERIOD
MOUNTAINS
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
POLAR REGIONS
ROCKS
SEDIMENTARY ROCKS
SHALES
STRATIGRAPHY
TRIASSIC PERIOD
USA