--> Abstract: Basement Geophysical Interpretation of the National Petroleum Reserve Alaska (NPRA), Northern Alaska, by R. W. Saltus, T. L. Hudson, and J. D. Phillips; #90904 (2001)
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Basement Geophysical Previous HitInterpretationNext Hit of the National Petroleum Reserve Alaska (NPRA), Northern Alaska

R. W. Saltus1, T. L. Hudson2, and J. D. Phillips1
1U.S. Geol Survey, Denver, CO
2Applied Geology, Sequim, WA

To produce maps of the thickness and inferred geophysical properties of the crust beneath the Ellesmerian rocks in NPRA we combine information from 1. total field aeromagnetic data, 2. terraced pseudogravity transform of magnetic data, 3. isostatic residual gravity, 4. basement residual gravity (based on geologic-stripping using seismic depth and velocity interpretations), 5. terraced basement gravity, 6. inferred Moho depth (from gravity inversion), 7. basement thickness (from both gravity and seismic Previous HitinterpretationNext Hit), 8. Ellesmerian section thickness (from seismic Previous HitinterpretationNext Hit), 9. basement depth (from seismic Previous HitinterpretationTop), 10. basement structure (interpreted from seismic data), and 11. limited well penetrations. Sialic crust characteristic of the Barrow Arch is thinned and modified to the south. Crustal physical properties indicate that dense and magnetic rocks make up a significant proportion of the crust in the southern part of NPRA.

AAPG Search and Discovery Article #90904©2001 AAPG Pacific Section Meeting, Universal City, California