The Mayflower is a copper, silver, and gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Mayflower MRDS details
Site Name
Primary: Mayflower
Commodity
Primary: Copper
Primary: Silver
Primary: Gold
Secondary: Antimony
Secondary: Zinc
Secondary: Arsenic
Secondary: Lead
Location
State: Alaska
District: Valdez Creek
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Skarn Cu
Model Name: Porphyry Cu-Au
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Alteration consists of a combination of skarn (epidote, garnet and actinolite), silica flooding, ankerite, pyrite and sericite. Limonite and uncommon chalcocite are oxidation and supergene mineral assemblages.
Rocks
Role: Host
Age Type: Associated Rock
Age in Years: 67.500000+-2.500000
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Stibnite
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Gold
Ore: Galena
Ore: Chalcopyrite
Gangue: Ankerite
Gangue: Quartz
Comments
Comment (Geology): Geologic Description = The country rocks in the area of the Mayflower prospect include Devonian to Triassic clastic, carbonate, volcanic, and volcaniclastic strata, which are intruded by a plug and dikes of Upper Cretaceous (70-65 Ma) quartz diorite porphyry (Swainbank and others, 1977). The Mayflower prospect is associated with a dikelike extension of the intrusive plug at the Golden Zone mine (HE043). Major faults trend northeast-southwest and have imparted a strong northeast-trending fabric to the host rocks. These faults have controlled the emplacement of intrusive rocks. At the Mayflower there is evidence that northwest-trending faults predated intrusion, as the dike trends northwest before swinging back to the northeast. The northwest-trending shear zone was also important during mineralization (unpublished report by Addwest Minerals International Ltd., 1997). ? There are three types of deposits: sulfide disseminations, veins, and skarns. The dike contains disseminated sulfides and stockwork quartz-sulfide veinlets. Limonite and ankerite alteration is widespread. Adjacent to the dike, calc-silcate skarn bodies up to 15 feet thick contain 0.1 ounce of gold per ton and 10% combined lead and zinc. The skarn comprises pyrrhotite, pyrite, chalcopyrite, and arsenopyrite (up to 10% by volume) in a epidote, garnet, and actinolite (unpublished report by Addwest Minerals International Ltd., 1997).
Comment (Deposit): Other Comments = See Golden Zone mine (HE043).
Comment (Geology): Age = The Mayflower prospect is a satellite of the nearby Golden Zone mine (HE043) which has been dated at 70-65 Ma (Late Cretaceous) (Swainbank and others, 1977).
Comment (Geology): Age = Chron age is for the nearby Golden Zone mine.
Comment (Deposit): Model Name = Combination of polymetallic vein and Au-Ag breccia pipe or Cu-Au porphyry (Cox and Singer, 1986; models 22c, 20c), with Cu skarn (Cox and Singer, 1986; model 18b)
Comment (Exploration): Status = Active
Comment (Reference): Primary Reference = unpublished report by Addwest Minerals International Ltd., 1997
Comment (Workings): Workings / Exploration = The prospect was explored by a reconnaissance IP and CS-AMT survey and by 1,500 feet of trenching. One shallow shaft was dug (during the 1930s?) and since has collapsed (Hawley and Clark, 1974).
Comment (Deposit): Model Number = 22c, 20c, 18b
References
Reference (Deposit): Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.
Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-1062, 113 p.
Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.
Reference (Deposit): Mulligan, J.J., Warfield, R.S., and Wells, R.R., 1967, Sampling a gold-copper deposit, Golden Zone Mine, south-central Alaska: U.S. Bureau of Mines Open-File Report 9-67, 59 p.
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