Commodities
PrimaryGold, Silver
SecondaryCopper, Iron
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formLINEAR
Ore controlLa Fortuna Vein Strikes S40w And Dips 70se. It Outcrops In Two Branches Of Which One Is 20 Feet Long By 12 Feet Wide And The Other 30 Feet Long By 5 Feet Wide. These Branches Are Reported To Have Joined At A Depth Of 500 Feet, Forming An Ore Body Approximately 100 Feet Long By 1 1/2 To 12 Feet Wide. The Ore Body Was Lost At A Fault Near The 800 Foot Level, And Only A Small Segment, Between The 900 And 1100 Foot Levels, Was Found By Further Exploration
Materials
Ore mineralsGold, Hematite, Limonite, Malachite, Silver
GangueGarnet, Quartz, Specularite
Geology
Host rockSchist,Gneiss
Associated rockAmphibolite,Pegmatite,Granite
Tectonic settingBasin And Range
AlterationThe Wall-Rock Alteration Accompanying La Fortuna Vein Consists Mainly Of Carbonatization And Silicification. Such Alteration Together With The Structure, Texture, And Mineralogy Of The Vein, Point To Deposition In The Lower Portion Of The Mesothermal Zone.
Economic & production
Development statusPast Producer
First production1896
Last production1941
Discovery year1895
Identification
Deposit ID10027250
MRDS IDM002626
Alternate namesFortuna
RegionNA
Data scoreB
Coordinates32.55176, -114.3305
References
ELSING, M.J., HEINEMAN, R.E.S., 1936, ARIZONA METAL PRODUCTION: ARIZ. B.M. BULLETIN 140, P. 104.WILSON, E.D., 1933, GEOLOGY AND MINERAL DEPOSITS OF SOUTHERN YUMA COUNTY, ARIZONA: ARIZ. B.M. BULLETIN 134 P. 189WILSON, E.D., CUNNINGHAM, J.B., BUTLER, G.M., 1934, ARIZONA LODE GOLD MINES AND GOLD MINING: ARIZ. B.M. BULLETIN 137, P. 158.SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: U.S. BUREAU OF MINES SPECIAL PUBLICATION, 334 P.CIMRIA.B.M. BULLETIN 134, P. 198; A.B.M. BULLETIN 140, P. 104. (13) KEITH, S.B., 1979