Mine detail: True Fissure Mine

Previously called ''

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Location

Lat / long:

47.41765, -115.33294

Resource(M)

Primary:	Lead, Silver
Secondary:	Copper
Ore:	Chalcopyrite, Galena
Gangue:	Hematite, Pyrite, Quartz, Siderite

Production

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

Geology

Host rock:	Burke Formation;Revett Formation
Host type:	Quartzite
Structure:	A Major Structural Grain Trends Nw And Consists Of Subparallel Faults And Folds. Major Fault Is The Osburn. This Fault Seems To Demarcate A Change In Folding Form With Folds To The North Showing Signs Of More Intense Structural Deformation Than Those To The South., Owing To Its Proximity To The Osborn Fault Beds Are Greatly Deformed And Are In Tight, Overturned, Nearly Isoclinal Folds
Tectonic:	Belt Basin
Alteration processes:	Hydrothermal Bleaching Is Common Within A Belt Approx 1 Mi Wide Along The North Side Of The Osburn Fault Zone. It Has Been Used As A Guide To Ore Deposits.

References

MRDS	DC08403
DEP	10019047
Reference	{Analytical Data:: SRC.REF: WALLACE, R. E. AND HOSTERMAN, J. W., 1956 : US GEOLOGICAL SURVEY BULL. 1027-M}{Deposit:: WALLACE, R. E. AND HOSTERMAN, J. W., 1956 , RECONNAISSANCE GEOLOGY OF WESTERN MINERAL COUNTY MONTANA: US GEOLOGICAL SURVEY BULL. 1027-M, P. 607 .}{Deposit:: CONSV. DIV. COMP. DATE, 02-15-1963}
Reporter	Unknown, Rojstaczer, Stuart A.