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File Created: 10-Feb-1988 by Steve B. Butrenchuk (SBB)
Last Edit:  20-Mar-1991 by Greg K. Kulla (Fox Consultants) (GKK)

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Name LAURIER PASS, CALNAN CREEK Mining Division Liard
BCGS Map 094B083
Status Showing NTS Map 094B13E
Latitude 056º 50' 55'' UTM 10 (NAD 83)
Longitude 123º 31' 36'' Northing 6300658
Easting 467877
Commodities Phosphate Deposit Types F07 : Upwelling-type phosphate
Tectonic Belt Foreland Terrane Ancestral North America
Capsule Geology

The Laurier Pass occurrence consists of a phosphatic horizon observed in a measured section, 12 kilometres north of Mount Laurier and 170 kilometres north of the town of MacKenzie (Geological Survey of Canada Paper 70-31).

Phosphate-bearing strata occur in the Middle Triassic Toad Formation over a stratigraphic interval of at least 62 metres. The dominant form of phosphate is black ovoid to spherical nodules that vary in size from 1 to 3 centimetres. Phosphatic cement may also be present. Nodular-bearing beds vary from 1 to 2 metres in thickness. Calcareous concretions occur in the lower part of the phosphatic sequence together with an abundance of phosphatic lenticles.

Host lithologies consist of shale and weakly carbonaceous and/or calcareous, generally quartzose siltstones. Most of these rocks are very weakly phosphatic.

EMPR FIELDWORK, *1987, pp. 396-410
GSC P 70-31
EMPR PFD 673259