Tertiary tectonics of the Border Ranges Fault system, north-central Chugach Mountains, Alaska: Sedimentation, deformation and uplift along the inboard edge of a subduction complex

Miscellaneous · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6206246

Little, T A

In south-central Alaska the Border Ranges Fault system (BRFS) separates lower Paleogene rocks of a forearc basin sequence from a Cretaceous subduction complex. In a north-central part of the Chugach Mountains the upper Paleocene-lower Eocene Chickaloon Formation was deposited along the seaward margin of the forearc basin as an alluvial fan complex. A field study combining geologic mapping of a {approximately}200 km{sup 2} region, stratigraphic studies, K-Ar and fission-track geochronology, metamorphic petrology, and detailed structural analysis of deformed rocks on both sides of the BRFS has been used to reconstruct the Tertiary history of displacements and uplift events along the inboard edge of Alaska's subduction-accretion complex.

• Research Organization: Stanford Univ., CA (USA)
• OSTI ID: 6206246
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
ALASKA
GEOLOGIC FAULTS
PLATE TECTONICS
ORIGIN
METAMORPHIC ROCKS
ISOTOPE DATING
PETROLOGY
FISSION TRACKS
GEOLOGIC HISTORY
MAPPING
STRATIGRAPHY
SUBDUCTION ZONES
TERTIARY PERIOD
AGE ESTIMATION
CENOZOIC ERA
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOLOGY
NORTH AMERICA
PARTICLE TRACKS
ROCKS
TECTONICS
USA
580000* - Geosciences