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Blachford Lake alkaline complex, Mackenzie District, Northwest Territories, Canada

Latitude: 62°6'N
Longitude: 112°40'W
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.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Aegirine
Aenigmatite
'Aeschynite'
Albite
Allanite-(Ce)
Analcime
Ankerite
Annite
Astrophyllite
Baryte
'Bastnäsite'
Bastnäsite-(Ce)
Biotite
Britholite-(Ce)
Calciocatapleiite
Calcite
Cassiterite
Catapleiite
Cerianite-(Ce)
Chalcopyrite
Chamosite
'Chlorite Group'
Columbite-(Fe)
Dolomite
Eudialyte
Fergusonite-(Y)
Ferrobustamite
Ferrorichterite
Fluorapatite
Fluorite
Gittinsite
Hematite
'Hornblende'
Ilmenite
Ixiolite
Kutnohorite
Lanthanite-(Ce)
Lepidolite
Magnetite
Mesolite
Molybdenite
'Monazite'
Monazite-(Ce)
Muscovite
Natrolite
Nepheline
Orthoclase
Parisite-(Ce)
Pectolite
'Perthite'
Phenakite
Polycrase-(Y)
Pyrite
Pyrochlore Group
'Pyroxene Group'
Pyrrhotite
Quartz
Riebeckite
Siderite
Sodalite
Sphalerite
Synchysite-(Ce)
Thorite
var: Uranothorite
Topaz
Uraninite
Willemite
Wollastonite
Xenotime-(Y)
Zircon


76 entries listed. 61 valid minerals.

Localities in this Region

Canada

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References

BADHAM, J.P.N. (1979) Geology and petrochemistry of lower Alphebian (2.4-2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lave, Northwest Territories. Canadian Journal of Earth Sciences, 16, 60-72.

DAVIDSON, A. (1978) The Blanchford Lake intrusive suite: an Alphebian alkaline plutonic complex in the Slave Province, Northwest Territories. Geological Survey of Canada, Paper 78-1A, 119127.

DAVIDSON, A. (1982) Petrochemistry of the Blanchford Lake complex near Yellowknife, Northwest Territories, Geological Survey of Canada, Paper 81-23, 71-79.

WOOLEY, A.R. (1987) In: Alkaline Rocks and Carbonatites of the World. Part 1: North and South America. Published by University of Texas Press, Austin. 49 57.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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