Mine detail: Helen Mine

Previously called ''

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Location

Lat / long:

48.08312, -123.99879

Resource(M)

Primary:	Manganese
Ore:	Bementite
Orebody form:	LENSES

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Crescent Formation;Crescent Formation
Host type:	Limestone
Structure:	North Wall Of Limestone Is In Fault Contact With Basalt
Tectonic:	Active Margin (Leading Edge Of North American Plate)

References

MRDS	M700215
DEP	10098698
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. 255.}{Deposit:: MAGILL, E.A., 1960, MANGANESE DEPOSITS OF THE OPYMPIC PENINSULA, WASH.: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 5530, P. 35.}{Deposit:: PURDY, C.P., JR., 1954, DIRECTORY OF WASHINGTON MINING OPERATIONS, 1954: WASHINGTON DIVISION OF MINES AND GEOLOGY INFORMATION CIRCULAR 23, P. 33.}
Reporter	Lawson, William A. (Evarts, Russell C.), Peterson, Jocelyn A.