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Nechalacho deposit, Thor Lake syenite complex, Blachford Lake alkaline complex, Mackenzie District, Northwest Territories, Canada

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Latitude & Longitude (WGS84): 62° 6' North , 112° 40' West
Latitude & Longitude (decimal): 62.10000,-112.66667
GeoHash:G#: c7pck0yws
Locality type:Deposit
Köppen climate type:Dfc : Subarctic climate


The Nechelacho deposit is a Layered Alkaline Suite (Sheard et al 2012) appox. 2 km² in area located in the Thor Lake syenite complex within the huge Blanchford Lake alkaline complex. It is a REE, rare metal deposit owned by Avalon Rare Metals Inc., and is being prepared for production in 2015.


Mineral List


66 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleoproterozoic
1600 - 2500 Ma



ID: 629930
Igneous: intrusive; Intrusive: undivided

Age: Proterozoic (1600 - 2500 Ma)

Description: North America, Slave Craton

Comments: Craton and massif; Hoffman et al., 1993; Stubley, 2005; Tella et al., unpublished compilation, 2007-08a

Lithology: Alkaline, peralkaline and subalkaline granite, quartz syenite, diorite, gabbro, foyaite, ijolite, carbonatite

Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. [2]

Siderian
2300 - 2500 Ma



ID: 3185293
Paleoproterozoic intrusive rocks

Age: Siderian (2300 - 2500 Ma)

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

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SHEARD, E.R. (2010) Behavior of zirconium, niobium, yttrium and REE in the Thor Lake rare-metal deposit, Northwest Territories, Canada. Unpublished M.Sc. thesis, McGill University, Montreal. 140p.
SHEARD, E.R., WILLIAMS-JONES, A.E., HEILIGMANN, M., PEDERSON, C. & TRUEMAN, D.L. (2012) Controls on the concentration of zirconium, niobium, and the rare earth elements in the Thor Lake rare metal deposit, Northwest Territories, Canada. Economic Geology, 107(1), 81-104.
SINCLAIR, W.D., JAMBOR, J.L. & BIRKETT, T.C. (1992) Rare earths and the potential for rare earth deposits in Canada: Exploration and Mining Geology, 1, 265−281.
SMITH, D.G.W., DE ST-JORRE, L., REED, S.J.B., & LONG, J.V.P. (1991) Zonally metamictized and other zircons from Thor Lake, Northwest Territories: Canadian Mineralogist, 29, 301−309.
TRUEMAN, D.L., PEDERSON, J.C., DE ST-ORRE, L., & SMITH, D.G.W. (1988) The Thor Lake rare-metal deposits, Northwest Territories: Canadian Institute of Mining and Metallurgy Special Volume 39, p. 280−290.
SHEARD, E.R. (2010) Behavior of zirconium, niobium, yttrium and REE in the Thor Lake rare-metal deposit, Northwest Territories, Canada. Unpublished M.Sc. thesis, McGill University, Montreal. 140p.
SHEARD, E.R., WILLIAMS-JONES, A.E., HEILIGMANN, M., PEDERSON, C. & TRUEMAN, D.L. (2012) Controls on the concentration of zirconium, niobium, and the rare earth elements in the Thor Lake rare metal deposit, Northwest Territories, Canada. Economic Geology, 107(1), 81-104.
SINCLAIR, W.D., JAMBOR, J.L. & BIRKETT, T.C. (1992) Rare earths and the potential for rare earth deposits in Canada: Exploration and Mining Geology, 1, 265−281.
SMITH, D.G.W., DE ST-JORRE, L., REED, S.J.B., & LONG, J.V.P. (1991) Zonally metamictized and other zircons from Thor Lake, Northwest Territories: Canadian Mineralogist, 29, 301−309.
TRUEMAN, D.L., PEDERSON, J.C., DE ST-JORRE, L., & SMITH, D.G.W. (1988) The Thor Lake rare-metal deposits, Northwest Territories: Canadian Institute of Mining and Metallurgy Special Volume 39, p. 280−290.
MÖLLER, V. (2016) The Nature and origin of the Nechalacho Rare Metal Deposit (REE, Nb, Zr), Northwest Territories, Canada. Unpublished Ph.D. thesis, McGill University, Montreal. 409 p.

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