Scientific Investigations Report 2007-5039
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007-5039
Undiscovered Locatable Mineral Resources in the Bay Resource Management Plan
Area, Southwestern Alaska: A Probabilistic Assessment
Prepared in cooperation with the U.S. Bureau of Land Management
By J.M. Schmidt, T.D. Light, L.J. Drew, F.H. Wilson, M.L. Miller, and R.W. Saltus
Table of Contents
Conversion Factors
Abstract
Introduction
Probabilistic Assessment Methodology
Undiscovered Mineral Resources in
the Bay RMP Area
Summary
Acknowledgments
References Cited
Figures
Figure 1. Location of the Bay Resource
Management Plan area (inside gray line), Alaska.
Figure 2. Location of tract BCAK, delineating
areas that are permissive for porphyry copper (BC-AK type) deposits.
Figure 3. Contained metal and mineralized
rock in porphyry copper deposits in tract BCAK.
Figure 4. Cumulative distribution of
contained metal and mineralized rock in porphyry copper deposits in tract BCAK.
Figure 5. Location of tracts CUSK1
and CUSK2, delineating areas within the Bay RMP area that are permissive for
copper skarn deposits.
Figure 6. Contained metal and mineralized
rock in copper skarn deposits in tract CUSK1.
Figure 7. Cumulative distribution of
contained metal and mineralized rock in copper skarn deposits in tract CUSK1.
Figure 8. Location of tract EPIV, delineating
areas within the Bay RMP area that are permissive for epithermal vein deposits.
Figure 9. Contained metal and mineralized
rock in epithermal vein deposits in tract EPIV.
Figure 10. Cumulative distribution
of contained metal and mineralized rock in epithermal vein deposits in tract
EPIV.
Figure 11. Location of tracts FESK1
and FESK2, delineating areas within the Bay RMP area that are permissive for
iron skarn deposits.
Figure 12. Contained metal and mineralized
rock in iron skarn deposits in tract FESK1.
Figure 13. Cumulative distribution
of contained metal and mineralized rock in iron skarn deposits in tract FESK1.
Figure 14. Location of tract HG, delineating
areas within the Bay RMP area that are permissive for hot spring mercury deposits.
Figure 15. Contained metal and mineralized
rock in hot-spring mercury deposits in tract HG.
Figure 16. Cumulative distribution
of contained metal and mineralized rock in hot-spring mercury deposits in tract
HG.
Figure 17. Location of tract IRG-SIL,
delineating areas within the Bay RMP area that are permissive for shallow- to
intermediate-level intrusion-related gold deposits.
Figure 18. Contained metal and mineralized
rock in shallow-to-intermediate level intrusion-related gold deposits in tract
IRG-SIL.
Figure 19. Cumulative distribution
of contained metal and mineralized rock in shallow-to-intermediate level intrusion-related
gold deposits in tract IRG-SIL.
Figure 20. Location of tract PGEP,
delineating areas within the Bay RMP area that are permissive for placer platinum-group-element
deposits.
Figure 21. Contained metal and mineralized
rock in placer platinum-group element deposits in tract PGEP.
Figure 22. Cumulative distribution
of contained metal and mineralized rock in placer platinum-group element deposits
in tract PGEP.
Figure 23. Location of tracts PLACER
1 and PLACER 2, delineating areas within the Bay RMP area that are permissive
for placer gold deposits.
Figure 24. Contained metal and mineralized
rock in placer gold deposits in tract PLACER1.
Figure 25. Cumulative distribution
of contained metal and mineralized rock in placer gold deposits in tract PLACER1.
Figure 26. Location of tract BESSHI,
delineating areas within the Bay RMP area that are permissive for Besshi-type
massive sulfide deposits.
Figure 27. Location of tract CYPRUS,
delineating areas within the Bay RMP area that are permissive for Cyprus-type
massive sulfide deposits.
Figure 28. Location of tract HSAU,
delineating areas within the Bay RMP that are permissive for hot-spring gold
deposits.
Figure 29. Location of tracts KUROKO1
and KUROKO2, delineating areas within the Bay RMP area that are permissive for
Kuroko-type massive sulfide deposits.
Figure 30. Location of tract LOSAU,
delineating areas within the Bay RMP area that are permissive for low sulfide
gold quartz vein deposits.
Figure 31. Location of tract MVT,
delineating areas within the Bay RMP area that are permissive for Mississippi
Valley type lead-zinc deposits.
Figure 32. Location of tract SNG,
delineating areas within the Bay RMP area that are permissive for tin greisen
deposits.
Figure 33. Location of tracts ZNSK1
and ZNSK2, delineating areas within the Bay RMP area that are permissive for
zinc skarn deposits.
Figure 34. Location of tracts ZUM1,
ZUM2, and ZUM3, delineating areas within the Bay RMP area that are permissive
for Alaskan (zoned ultramafic complex) platinum-group-element deposits.
Tables
Table 1. Permissive mineral deposit
tracts within the Bay Resource Management Plan area.
Table 2. Estimated amounts of contained
metal and mineralized rock (metric tons) in porphyry copper deposits in tract
BCAK.
Table 3. Estimated amounts of contained
metal and mineralized rock (metric tons) in copper skarn deposits in tract CUSK1.
Table 4. Estimated amounts of contained
metal and mineralized rock (metric tons) in epithermal vein deposits in tract
EPIV.
Table 5. Estimated amounts of contained
metal and mineralized rock (metric tons) in iron skarn deposits in tract FESK1.
Table 6. Estimated amounts of contained
metal and mineralized rock (metric tons) in hot spring Hg deposits in Tract
HG.
Table 7. Grade and tonnage data for
13 shallow-to-intermediate level intrusion-related gold deposits worldwide.
Table 8. Elements of a resource classification
(“McKelvey diagram”).
Table 9. Estimated amounts of contained
metal and mineralized rock (metric tons) in shallow to intermediate level intrusion-related
gold deposits in tract IRG-SIL.
Table 10. Estimated amounts of contained
metal and mineralized rock (metric tons) in placer platinum-group-element deposits
in tract PGEP.
Table 11. Estimated amounts of contained
metal and mineralized rock (metric tons) in placer gold deposits in tract PLACER1.
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Send questions or comments about this report to the author, J.M. Schmidt, (907) 786-7494.
For more information about USGS activities in Alaska, visit the USGS
Alaska Science Center home page.
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Department of the Interior | U.S. Geological
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