CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit group number Country Location Names Commodities
20 United States (New York) 43.26.50 N -- 073.32.45 W Fort Ann mine group Fe
 
Database name: World Fe-oxide+/-Cu-Au-U (IOCG) deposits
Compilers: Sunil S. Gandhi
Release date: 2015-03-03
   
Deposit group name(s): Fort Ann mine group
Political location(s): United States; Province or state: New York; Subprovince or locality: Washington County; Nearest community: Glens Falls (18 km 035)
Deposit clan (type): Kiruna-type
Commodities: Fe
Geological ages: Late Mesoproterozoic (host rocks)
Host rocks: (1) intrusive; unclassified granitoid rocks
Host rock stratigraphy:Lyon Mountain Intrusive Suite
Radiometric ages: Object dated: Host Rocks; Age - Ma: 1,055; +7; -7; Dating method: U-Pb; Concentrate: zircon; Source rock: K-rich leucogranitic gneiss; Formal name: Lyon Mtn. suite / sample AM 86-10; Event dated: host rock; Interpretive comment: outer zone of zircons dated; late stage Ottawan orogeny; zircon cores dated at 1152 +/- 11Ma; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72

Object dated: Host Rocks; Age - Ma: 1,055; +7; -7; Dating method: U-Pb; Concentrate: zircon; Source rock: Na-rich leucogranitic gneiss; Formal name: Lyon Mtn. suite / sample AM 86-14; Event dated: host rock; Interpretive comment: outer zone of zircons dated; late stage Ottawan orogeny; zircon cores dated at 1141 +/-16 Ma; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72

Object dated: Host Rocks; Age - Ma: 1,060; +10; -10; Dating method: U-Pb; Concentrate: zircon; Source rock: K-rich leucogranitic gneiss; Formal name: Lyon Mtn. suite / sample AM 86-4; Event dated: host rock; Interpretive comment: outer zone of zircons dated; late stage Ottawan orogeny; zircon cores dated at 1158 +/-16 Ma; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72

Object dated: Host Rocks; Age - Ma: 1,048.7; +2.2; -2.2; Dating method: U-Pb; Concentrate: zircon; Source rock: K-rich leucogranitic gneiss; Formal name: Lyon Mtn. suite / sample 9-23-85-6; Event dated: host rock; Interpretive comment: outer zone of zircons dated; late stage Ottawan orogeny; zircon cores small or absent; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72

Object dated: Host Rocks; Age - Ma: 1,047.3; +2.2; -2.2; Dating method: U-Pb; Concentrate: zircon; Source rock: fayalite granite; Formal name: Lyon Mtn. suite / sample AM 86-11; Event dated: host rock; Interpretive comment: massive phase of the gneissic intrusive emplaced at late stage of the Ottawan orogeny; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72

Object dated: Host Rocks; Age - Ma: 1,047; +10; -10; Dating method: U-Pb; Concentrate: zircon; Source rock: fayalite granite; Formal name: Lyon Mtn.suite / sample CLFG; Event dated: host rock; Interpretive comment: Late Ottawan massive phase; outer zone of zircons dated; cores dated at 1155 +/-16 Ma; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72

Object dated: Related igneous rocks; Age - Ma: 1,034; +10; -10; Dating method: U-Pb; Concentrate: zircon; Source rock: Zoned pegmatite (qtz-alb.) dyke; Formal name: Lyon Mtn. suite/ sample PL-PEG; Event dated: host rock; Interpretive comment: Pegmatite cuts leucogranitic gneiss of the suite; elsewhere postdates magnetite-rich zones in it; Reference: McLelland, J.; Hamilton, M.; Selleck, B.; McLelland, J. M.; Orrell, S. ; Walker, D., 2000: Zircon U-Pb Geochronology of the Ottawan Orogeny, Adirondacks Highlands, New York: Regional and Tectonic Implications; Precambrian Research, Volume 109, p. 39 - 72
Production data: Report period: from 1830 until 1881; 350,000 long ton ore; Provisional entry?: yes; Yearly or summary?: S
Grade-commodity information:Fe: 50 percent
Reference: Newland, D. H., 1908: Geology of the Adirondack Magnetic Iron Ores, with a Report on the Mineville-Port Henry Mine Group by J. F. Kemp; New York State Museum Bulletin, p. 1 - 182
Percent weights allocated to camp: 100.0%
Associated deposit(s): Podunk mine (645), Potter mine (646), Mt. Hope mine (647)

Generated 2015-03-03 11:24:46 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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