NURE aerial gamma-ray and magnetic reconnaissance survey, Eastern Alaska area: Tanacross-Nabesna-McCarthy quadrangles. Volume I. Narrative report
Technical Report
·
OSTI ID:5876741
As part of the Department of Energy (DOE) National Uranium Resource Evaluation (NURE) Program, LKB Resources, Inc. has performed a rotary-wing, reconnaissance high sensitivity radiometric and magnetic survey covering the Alaska portion of twenty-nine 1:250,000 NTMS quadrangles. A total of 21,409 line miles (34,455 line kilometers) of data were collected during the 1976 and 1977 flying seasons utilizing a Bell 205A-1 in 1976 and a Sikorsky S58T in 1977. Traverse lines were flown in an east-west direction at 6.25 mile (10 kilometer) spacing, with tie lines flown in a north-south direction at 25 mile (40 kilometer) spacing. The data were digitally recorded at 2.0 second intervals. The terrestrial sensor NaI crystal detectors used in this survey had a volume of 2154 cubic inches. The magnetometers employed were a modified ASQ-10 fluxgate (1977) and a Varian V-85 proton (1976). This report covers only the Eastern Alaska Area, flown in 1976, comprising the Tanacross, Nabesna, and McCarthy NTMS 1:250,000 scale quadrangles. The Cook Inlet, Chugach/Yakutat, and Southeastern areas are covered in separate reports. The radiometric data was normalized to 400 feet terrain clearance. The results are presented as both microfiche copies of computer listings and as stacked profile plots at a scale of 1:500,000. The stacked profile plots are contained in Volume II of this report. The results of the radiometric survey indicate several areas where additional study seems warranted. These include the northeastern portion of the Tanacross quadrangle over the intrusive, metamorphic and volcanic complex of the Tanana Uplift; the southeastern quadrant of the Nabesna quadrangle along a zone generally corresponding with the trace of the Denali fault, and the south-central part of the McCarthy quadrangle along the southern flanks and foothills of the Wrangell Mountains.
- Research Organization:
- LKB Resources, Inc., Huntingdon Valley, PA (USA)
- DOE Contract Number:
- AC13-76GJ01664
- OSTI ID:
- 5876741
- Report Number(s):
- GJBX-91-(78)(Vol.1)
- Country of Publication:
- United States
- Language:
- English
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