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Aley Deposit (Aley Creek Carbonatite Complex), Williston Lake, Omenica Mining Division, British Columbia, Canada

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Latitude & Longitude (WGS84): 56° 27' 57'' North , 123° 44' 57'' West
Latitude & Longitude (decimal): 56.46611,-123.74917
GeoHash:G#: c6010p2dg
Other regions containing this locality:Rocky Mountains, North America
Owned/operated by:Taseko (100%)
Locality type:Deposit (Planned Future Operation) - last checked 2018
Köppen climate type:Dfc : Subarctic climate


The Aley Creek area is underlain by Cambrian to Devonian carbonate and clastic rocks of the Kechika Group, Skoki Formation and Road River Group. This miogeoclinal succession, deposited near the shelf/off-shelf boundary, was intruded by the Aley carbonatite complex prior to the main Late Jurassic-Early Cretaceous orogenic event. The complex consists of a rauhaugite (dolomitic carbonatite) core zone, 2 kilometres in diameter, surrounded by an older, outer ring of amphibolite. A contact aureole of recrystallized carbonate rocks surrounds the amphibolite margin. Rare-earth, carbonate-rich dykes occur throughout the complex but are most common in the outer alteration halo (contact aureole).

World's largest niobium deposit outside of Brazil.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


47 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

Late Devonian - Early Paleozoic
358.9 - 541 Ma



ID: 3184280
Paleozoic sedimentary rocks

Age: Paleozoic (358.9 - 541 Ma)

Comments: Besa Assemblage; Cordillaran Foreland Belt

Lithology: Siltstone,shale,carbonate

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]

Ordovician - Cambrian
443.8 - 541 Ma



ID: 663477
Kechika Group

Age: Paleozoic (443.8 - 541 Ma)

Stratigraphic Name: Kechika Group

Description: Phylllitic siltstone and shale, limestone, wavy banded, silty, nodular, argillaceous limestone, calcareous siltstone and shale, sandstone, minor green tuff (Trempealeauan to Arenigian); undifferentiated; includes Skoki Formation in 93O, just east

Comments: K. Bellefontaine, A. Legun, N.W.D. Massey and P. Desjardins -AND- D. MacIntyre, A. Legun, K. Bellefontaine and N. W.D.Massey, 1995, Geological Compilation Northeast BC - Southern Half -AND- Open File 1995-6 (Northern Part), OF 1995-24, BCGS

Lithology: Undivided sedimentary rocks

Reference: B.C. Geological Survey. British Columbia Digital Geology. [3]

Ordovician - Cambrian
443.8 - 541 Ma



ID: 3425151
Kechika Group

Age: Paleozoic (443.8 - 541 Ma)

Stratigraphic Name: Kechika Group

Description: Phylllitic siltstone and shale, limestone, wavy banded, silty, nodular, argillaceous limestone, calcareous siltstone and shale, sandstone, minor green tuff (Trempealeauan to Arenigian); undifferentiated; includes Skoki Formation in 93O, just east

Comments: North America - basinal strata terrane

Lithology: Undivided sedimentary rocks

Reference: Cui, Y., Miller, D., Schiarizza, P., and Diakow, L.J. British Columbia digital geology. British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey Open File 2017-8. [205]

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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
MÄDER, U.K. (1987) The Aley Creek carbonatite complex. Unpublished M.Sc. Thesis, University of British Columbia, Vancouver. 176 p. Abstracted in: British Columbia Ministry of Energy, Mines and Petroleum resources, Geological Fieldwork, Paper 1987-1. 283-288.
Jennifer Pell (1994) Carbonatites, Nepheline Syenites, Kimberlites and Related Rocks in British Columbia. Brithish Columbia Ministry of Energy Bulletin 88.
Berger, V.I., Singer, D.A., and Orris, G.J. (2009): Carbonatites of the World. Explored Deposits of Nb and REE - Database and Grade and Tonnage Models. USGS Open-File Report 09-1139.
Chakhmouradian, A. R., Reguir, E. P., Kressall, R. D., Crozier, J., Pisiak, L. K., Sidhu, R., & Yang, P. (2015). Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): Mineralogy, geochemistry and petrogenesis. Ore Geology Reviews, 64, 642-666.

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