National uranium resource evaluation: Dixon Entrance Quadrangle, Alaska
The Dixon Entrance Quadrangle (1:250,000 scale, Alaska-Canada Topographic series) includes southern islands of Southeast Alaska as well as the northern tip of the Queen Charlotte Islands of British Columbia. The Alaska portion of the quadrangle was evaluated to identify and delineate environments favorable for uranium deposits using criteria developed for the National Uranium Resource Evaluation program. The evaluation is based on data from aerial and ground radiometric surveys, geochemical sampling, published geologic reports, and helicopter-supported surface reconnaissance. Bed rock is mostly masked by surficial cover, and detailed geologic maps are available for only a small part of the quadrangle. Known uranium deposits are associated with the Bokan Mountain peralkaline granite stock of Devonian age from which uranium and thorium ore have been produced and which is considered favorable for autometasomatic uranium deposits. Orthomagmatic, pegmatitic, magmatic-hydrothermal, and contact-metasomatic environments related to the Bokan Mountain granite are considered unfavorable because they do not appear to meet grade or tonnage criteria. Additional uranium occurrences and uranium radiometric and geochemical anomalies were discovered away from the Bokan Mountain granite, but none appeared related to granitic complexes similar to Bokan Mountain. No other geologic environments that meet favorability criteria for the occurrence of uranium deposits were found by the reconnaissance-level field investigations conducted in the quadrangle. The Forrester Island US Wildlife Refuge was not evaluated.
- Research Organization:
- Bendix Field Engineering Corp., Grand Junction, CO (USA)
- DOE Contract Number:
- AC13-76GJ01664
- OSTI ID:
- 5261336
- Report Number(s):
- PGJ/F-047(82); ON: DE82014112; TRN: 82-012772
- Resource Relation:
- Other Information: Portions of document are illegible. Includes 4 sheets of 24x reduction microfiche
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALASKA
URANIUM DEPOSITS
EVALUATION
AERIAL SURVEYING
DATA ANALYSIS
GEOCHEMICAL SURVEYS
GEOLOGICAL SURVEYS
GRANITES
RADIOMETRIC SURVEYS
FEDERAL REGION X
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
IGNEOUS ROCKS
MINERAL RESOURCES
NORTH AMERICA
PLUTONIC ROCKS
RESOURCES
ROCKS
SURVEYS
USA
050200* - Nuclear Fuels- Exploration- (-1987)