Mine detail: Helena Prospect

Previously called ''

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Location

Lat / long: 47.83203, -121.53677

Resource(M)

Primary: Copper
Ore: Bornite, Chalcopyrite, Pyrite
Gangue: Calcite, Quartz
Orebody form: VEIN

Production

Operation type: Unknown
Production size: None
Development status: Occurrence

Geology

Host rock:Index Batholith
Host type:Diorite
Tectonic:Cascade Volcanic Arc
Alteration processes:Host Rock Has Been Altered

References

MRDSM025906
DEP10036933
Reference{Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 85.}{Deposit:: BROUGHTON, W.A., 1942, INVENTORY OF MINERAL PROPLERTIES IN SNOHOMISH COUNTY, WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY REPORT OF INVESTIGATIONS 6, P. 17.}{Deposit:: TABOR, R.W., FRIZZELL, V.A., JR., BOOTH, D.B., WHETTEN, J.T., WAITT, R.B., JR., AND ZARTMAN, R.E., 1982, PRELIMINARY GEOLOGIC MAP OF THE SKYKOMISH RIVER 1:100,000 QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 82-747, SCALE 1:100,000.}
ReporterAndrews, David H. (Lawson, William A.), Peterson, Jocelyn A.