Mine detail: Grannis Deposit

Previously called 'Mount Prospect'

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Location

Lat / long: 41.73749, -73.27234

Resource(M)

Tertiary: Cobalt, Nickel
Other material: Apatite, Biotite, Chalcopyrite, Clinohypersthene, Hornblende, Hypersthene, Paragonite, Pentlandite, Plagioclase, Pyrite, Pyrrhotite, Quartz

Production

Operation type: Surface-Underground
Development status: Past Producer

Geology

References

MRDSW000163
MAS90050005
DEP10142905
Reference{Deposit:: HOWE, E., 1915, SULPHIDE-BEARING ROCKS FROM LITCHFIELD,}{Deposit:: CONN., ECONOMIC GEOLOGY, VOLUME 10, PP. 330-347.}{Deposit:: CAMERON, E. N., 1943, ORIGIN OF SULPHIDES IN THE NICKEL}{Deposit:: DEPOSITS OF MOUNT PROSPECT, CONN.:}{Deposit:: BULLETIN GEOL. SOC. OF AMERICA, VOL. 54, PP. 651-686.}{Deposit:: CORNWALL, H. R., 1966, NICKEL DEPOSITS IN NORTH AMERICA,}{Deposit:: U. S. GEOLOGICAL SURVEY BULLETIN 1223.}{Deposit:: RICE, W. N. AND GREGORY, H. E., 1906, MANUAL OF THE}{Deposit:: GEOLOGY OF CONNECTICUT, HARTFORD PRESS.}{Deposit:: SCHAIRER, J. F., 1931, THE MINERALS OF CONN., STATE}{Deposit:: GEOLOGICAL AND NATURAL HISTORY SURVEY BULLETIN NO. 51.}{Deposit:: GATES, R. M. AND BRADLEY, W. C., 1952, THE GEOLOGY OF THE}{Deposit:: NEW PRESTON QUAD., STATE GEOLOGICAL AND NATURAL HISTORY}{Deposit:: SURVEY OF CONN., MISC. SER. NO. 5.}{Deposit:: BROEDEL, C.H. AND CORNWALL, H. R., 1954,}{Deposit:: NICKEL AND COBALT IN NEW ENGLAND AND NEW YORK,}{Deposit:: NEW ENGLAND-NEW YORK INTER AGENCY COMMITTEE:}{Deposit:: MINERAL RESOURCES STUDY AND REPORT GROUP, PP. 32-42.}{Deposit:: DUNN GEOSCIENCE CORP. FILE ITEM: MEMORANDUM, APRIL 29, 1959,}{Deposit:: JAMES R. DUNN TO ROLAND F. BEERS,}{Deposit:: SUBJECT: POLISHED SPECIMENS STUDY, MT. PROSPECT, CONN.}{Deposit:: U.S. BUMINES WAR MINERAL REPT.-CONN. NICKEL PROSPS. 91.3081.}
ReporterDunn, George