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File Created: 01-Aug-1990 by Larry Jones (LDJ)
Last Edit:  26-Jan-2018 by George Owsiacki (GO)

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BCGS Map 093O051
Status Showing NTS Map 093O12W
Latitude 055º 31' 19'' UTM 10 (NAD 83)
Longitude 123º 56' 27'' Northing 6153277
Easting 440601
Commodities Thorium, Rare Earths, Lanthanum, Cerium, Praseodymium, Neodymium, Samarium, Gadolinium, Yttrium Deposit Types O02 : Rare element pegmatite - NYF family
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Laura occurrence is located on Mount Bisson, 55 kilometres northwest of the community of Mackenzie.

The area lies within the Omineca Belt, which consists of siliciclastic sediments with minor carbonates and mafic rocks. These rocks belong to the Upper Proterozoic Ingenika Group. Within the Wolverine Range, the sediments are highly metamorphosed and subsequently intruded by granodioritic bodies and associated pegmatites, which are possibly Early Cretaceous. These high-grade metamorphic rocks, known as the Halleran Alkaline Complex, part of the Wolverine complex, consist of amphibolite and calc-silicate gneiss, schists, micaceous quartzite, and crystalline limestone. Metasomatism of the Wolverine amphibolite gneisses resulted in a secondary alkalic overprinting, possibly related to a deep-seated intrusion. Four rare earth element (REE) minerals have been found on the property, including monazite, allanite, cerorthite and an unidentified Ba-Fe-REE-silicate.

The Laura showing occurs within a 110 by 60 metre zone of alkalic alteration. Monzonite (Mount Bisson intrusions) outcrops to the south. Biotite amphibolite appears to be altered to banded aegirine augite-alkali feldspar syenite. Within the alteration zone are various pegmatites containing allanite, nepheline, monazite, quartz, magnetite, and feldspar. The allanite pegmatites are up to 30 metres long and 4 metres wide.

In 1988, a sample (UG-7911) of allanite pegmatite assayed 0.11 per cent thorium, 2.24 per cent lanthanum, 2.53 per cent cerium, 0.13 per cent praseodymium, 0.58 per cent neodymium, and 0.5 per cent samarium (Assessment Report 17872).

In 1989, a radioactive sample (UG-7826), taken 350 metres to the southeast, assayed 0.305 per cent thorium, greater than 0.002 per cent strontium, 0.141 per cent praseodymium, 0.419 per cent neodymium, greater than 0.9 per cent lanthanum and greater than 2.0 per cent cerium (Halleran, 1989 - Property File and Assessment Report 19404).

In 1994, a grab sample (BIR-2) assayed 0.159 per cent lanthanum, 0.252 per cent cerium, 0.031 per cent praseodymium, 0.086 per cent neodymium, 0.087 per cent samarium, 0.174 per cent gadolinium and 1.9 per cent yttrium (Assessment Report 24861).

In 2011, trench samples yielded up to 0.564 per cent total rare earth oxides plus yttrium (TREO+Y) over 1.0 metre (TR11-14B; Assessment Report 32770).

The property was discovered by prospecting in 1987 and optioned by Chevron Minerals Limited a year later. A program of rock and soil sampling, geological mapping and a 2.7 line-kilometres ground scintillometer survey was completed at this time. In 1989, a program of rock sampling and geological mapping was completed. In 1996, Argonauts Group completed prospecting and geological mapping on the area as the ERZ claims. During 2006 through 2011, Paget Minerals completed programs of rock and silt sampling, geological mapping and a combined airborne magnetic and radiometric survey, totalling 564.4 line-kilometres, on the area known as the Mount Bisson property.

EMPR ASS RPT 117734, *17872, *19404, *24861, 28877, 29693, 30498, 31947, *32770
EMPR EXPL 1988-C182
EMPR FIELDWORK 1987, pp. 169-180; *1989, pp. 297-304; 1992, pp. 301-306
EMPR PF (Report by Halleran, A.A.D., 1989)
EMPR PF Chevron (Chemex Labs Ltd. (1987): Certificate of Analysis for Mon 1-8 samples; Unknown (unknown): Rough calculations of chip and rock samples from the Will, Laura, and Ursa claims; Unknown (unknown): Map of the Property Geology of the Halleran Alkaline Complex; Chemex Labs Ltd. (1986): Certificate of Analysis for Mon 1-8 and Mon 2-86 samples; M.W. Hitzman (1989): Letter to Jim Allan re Ursa property; Unknown (unknown): Fig. 7 Laura Alkaline Intrusive; Unknown (1988): Figure Three, map showing geology and showings, REE - Mt. Bison; S. McAllister (1988): Memo to Earl Dodson re: REE Project - Mt. Bison - summary of results; M.W. Hitzman (1989): Chevron Minerals, 1989, letter to John Hamilton regarding Ursa property; A. Halleran (1988): The Halleran Alkaline Complex Manson Creek Area; A. Halleran (unknown): Location of Halleran Property and other carbonatite and nepheline syenite gneiss complexes; Unknown (unknown): Fig. 6 - Property Geology, Halleran Alkaline Complex; Unknown (unknown): Fig. 10 - Cross-section may of the Ursa Property; Meder (1997): Figure 2 - Geological map of the Aley carbonatite)
PR REL Paget Minerals Corp., Aug.25, 2010, Aug.23, 2011
GSC MAP 11-1961
GSC OF 925