Thor Lake syenite complex, Blachford Lake alkaline complex, Mackenzie District, Northwest Territories, Canada
|Latitude & Longitude (WGS84):||62° 4' North , 112° 45' West|
|Latitude & Longitude (decimal):||62.06667,-112.75000|
|Köppen climate type:||Dfc : Subarctic climate|
The Thor Lake syenite complex is in the eastern half of the Blanchford Lake alkaline complex on the north shore and partially under the Hearne Channel of the Great Slave Lake, approx. 100 km east of Yellowknife. The complex is emplaced in the Grace Lake granite and represent one of latest stages of successive intrusions in the Blanchford Lake alkaline complex. It is roughly circular and is about 6.5 km in diameter. The age of the Thor Lake complex is 2097±10 Ma.
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69 valid minerals.
Rock Types Recorded
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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.
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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Comments: Craton and massif; Hoffman et al., 1993; Stubley, 2005; Tella et al., unpublished compilation, 2007-08a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.