Mine detail: Dutch John Lease

Previously called 'SherwoodLodgeTexas CreekSeneff'

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Location

Lat / long:

48.21039, -120.05423

Resource(M)

Primary:	Molybdenum
Secondary:	Tungsten
Tertiary:	Copper, Iron
Ore:	Chalcopyrite, Hematite, Magnetite, Molybdenite, Powellite, Pyrite, Scheelite
Gangue:	Calcite, Epidote, Grossularite
Orebody form:	BED

Production

Operation type:	Unknown
Deposit type:	Contact Metasomatic
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Leecher Metamorphics;Leecher Metamorphics;Leecher Metamorphics;Leecher Metamorphics
Host type:	Limestone
Associated rock:	Texas Creek Stock
Associated type:	Diorite
Structure:	Northeast Plunging Anticline, Small Drag Folds
Tectonic:	Cascade Volcanic Arc?
Alteration processes:	Limestone Beds Altered To Garnet.

References

MRDS	W017841
DEP	10111551
Reference	{Analytical Data:: SRC.REF: N}{Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 345.}{Deposit:: CULVER, H.E., AND BROUGHTON, W.A., 1945, TUNGSTEN RESOURCES OF WASHINGTON: WASHINGTON DIVISION OF GEOLOGY BULLETIN 34, P. 51-52.}{Deposit:: BUNNING, B.B., 1990, GEOLOGIC MAP OF THE EAST HALF OF THE TWISP 1:100,000 QUADRANGLE, WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-9, SCALE 1:100,000.}{Deposit:: LEMMON, D.M., U.S. GEOLOGICAL SURVEY, UNPUB DATA.}{Deposit:: LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE UNITED STATES: U.S. GEOLOGICAL SURVEY MINERAL INVESTIGATIONS RESOURCES MAP MR-25.}{Deposit:: KING, R.U., U.S. GEOLOGICAL SURVEY, UNPUB DATA.}
Reporter	Weeks, Robert, Lawson, William A. (Evarts, Russell C.), Peterson, Jocelyn A.