Blachford Lake alkaline complex, Mackenzie District, Northwest Territories, Canada
|Latitude & Longitude (WGS84):||62° 6' North , 112° 40' West|
|Latitude & Longitude (decimal):||62.10000,-112.66667|
|Köppen climate type:||Dfc : Subarctic climate|
Alkaline complex with approx. 235 km² surface exposure, but another 140 km² may be hidden beneath the Hearne Channel of Great Slave Lake. Age: range 2057-2166 Ma.
Successive phases of the complex include the Grace Lake granite ~155 km² in area and within that the Thor Lake syenite complex and within that the Nechalacho deposit.
Mineral ListMineral list contains entries from the region specified including sub-localities
71 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
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Entries shown in red are rocks recorded for this region.
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
1600 - 2500 Ma
|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Comments: Craton and massif; Hoffman et al., 1993; Stubley, 2005; Tella et al., unpublished compilation, 2007-08a
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. 
2300 - 2500 Ma
|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.