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File Created: 16-Oct-1992 by Keith J. Mountjoy (KJM)
Last Edit:  27-Mar-2022 by Nicole Barlow (NB)

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Name LEXIM, CIRQUE, LEXIM 1-3, MET, ANT, ANT 1-3 Mining Division Liard, Omineca
BCGS Map 094E044
Status Showing NTS Map 094E06W
Latitude 057º 27' 02'' UTM 09 (NAD 83)
Longitude 127º 16' 04'' Northing 6368866
Easting 603947
Commodities Gold, Silver Deposit Types H05 : Epithermal Au-Ag: low sulphidation
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Lexim occurrence is located in an east-facing cirque, 5 kilometres south-southeast of Tuff Peak and 4 kilometres east-northeast of the Mets prospect (094E 093), approximately 305 kilometres north of Smithers. It lies within the Omineca-Cassiar Mountains in the west-central portion of the Toodoggone Gold Camp.

The showing is situated within a Mesozoic volcanic arc assemblage which lies along the eastern margin of the Intermontane Belt, a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions bounded to the east by the Omineca Belt and to the west and southwest by the Sustut and Bowser basins. Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Takla Group andesite flows and pyroclastic rocks. These Takla rocks have been intruded by plutons and other bodies of the mainly granodiorite to quartz monzonite Early Jurassic Black Lake Suite and are in turn unconformably overlain by or faulted against Lower Jurassic calcalkaline volcanics of the Toodoggone Formation (Hazelton Group).

The dominant structures in the area are steeply dipping faults which define a prominent regional northwest structural fabric trending 140 to 170 degrees. In turn, high angle, northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

The Lexim showing is underlain by volcanics of the Attycelley Member of the Toodoggone Formation. At this showing these consist of varieties of feldspar, hornblende, and biotite porphyries of andesite to dacite composition; crystal-lithic tuffs and lapilli tuffs, massive flows, chaotic breccias and lahar of rhyolitic composition, and conglomerate, sandstone, mudstone and dikes (Assessment Report 15257). The showing lies between two of four north-northwest trending faults transecting the area around the Lexim showing.

At the Lexim showing, quartz stringers occur in orange, altered feldspar porphyritic tuff; minor pyrite was noted. Three hundred metres to the northeast, a band of quartz float is traceable in a northwest direction for about 500 metres. Textures in float consist of coxcomb and banded (chalcedony) quartz. Assay results from float material ranges from 0.105 to 0.920 gram per tonne gold and 19.1 to 68.2 grams per tonne silver (Assessment Report 15257). Sample 85PS59R, taken from the outcrop containing quartz stringers, analyzed 27.2 grams per tonne gold and greater than 100 grams per tonne silver (Assessment Report 15257).

In 1985, prospecting and reconnaissance geological mapping on the Lexim mineral claims for the junior company, Mandusa Resources Ltd., discovered proximal quartz-breccia float where previous investigations noted no mineralization. This original discovery was made by prospector P. Suratt. This work was followed up by close-spaced sampling of frost heaved float and subcrop, a soil contour line parallel to the trend on mineralization, and a preliminary very low frequency geophysics survey.

The GO claims were abandoned and the Mandusa group of three claims, covering 30 units, was staked in 1994 by L. Hewitt to cover the ground of the original Lexim group.

In 1994, Alpine Explorations Ltd. conducted a program of mainly prospecting and soil sampling and reconnaissance geologic mapping to locate and confirm the anomalous results of the 1985 discovery of precious metal-bearing float. During this year 83 rock and 162 soil samples were collected for analysis. Concentrations of proximal float of epithermal quartz vein and stockworks containing highly anomalous values of gold (to 27.7 grams per tonne) and silver (in excess of 200 grams per tonne) are common (Assessment Report 23847). No in situ mineralization has been found.

The area was held in the late 2000s by Paget Resources as the Met property, but little work was done on the Lexim showing. In 2006, a single float sampled at the Cirque-Lexim zone assayed 11.0 grams per tonne gold and 430 grams per tonnes silver; other samples were not anomalous (Assessment Report 30413, page 8). In 2008, mapping and rock sampling was completed on several tenures (Assessment Report 30413). The 2008 program evaluated most of the known mineralized zones on the property including the Cirque, Ridge, BT, Camp, and NW zones where rock samples were collected. The Cirque zone is in the vicinity of the Lexim zone (sample 85PS59R) and may be considered the same zone. A Cirque zone sample from peripheral talus with coarse-grained quartz-pyrite veins containing minor iron-carbonate oxide yielded 0.34 gram per tonne gold (Assessment Report 30413).

EMPR ASS RPT *10473, *15257, *23847, 28650, *30413, 39514
EMPR EXPL 1975-E163-E167; 1976-E175-E177; 1977-E216-E217; 1978-E244-E246; 1979-265-267; 1980-421-436; 1982-330-345; 1983-475-488; 1984-348-357; 1985-C349-C362; 1986-C388-C414; 1987-C328-C346; 1988-C185-C194
EMPR FIELDWORK 1980, pp. 124-129; 1981, pp. 122-129, 135-141; 1982, pp. 125-127; 1983, pp. 137-138, 142-148; 1984, pp. 139-145, 291-293; 1985, pp. 167-169, 299; 1987, pp. 111, 114-115; 1989, pp. 409-415; 1991, pp. 207-216
EMPR GEM 1969-103; 1971-63-71; 1973-456-463
EMPR GEOLOGY 1977-1981, pp. 156-161
EMPR MAP 61 (1985)
EMPR PF (Photogeologic Interpretation Map of the Northern Omineca area, Oct. 1964, Canadian Superior Exploration Limited-in 94E General File)
GSC OF 306; 483
GSC P 76-1A, pp. 87-90; 80-1A, pp. 27-32
ECON GEOL Vol.86, pp. 529-554, 1991
GCNL #23(Feb.1), 1985; #165(Aug.27), 1986
IPDM Nov/Dec 1983
MIN REV September/October, 1982; July/August, 1986
N MINER October 13, 1986
N MINER MAG March 1988, p. 1
WIN Vol.1, #7, June 1987
W MINER April, 1982
Forster, D.B. (1984): Geology, Petrology and Precious Metal Mineralization, Toodoggone River Area, North-Central British Columbia, Unpub. Ph.D. Thesis, University of British Columbia
Diakow, L.J. (1990): Volcanism and Evolution of the Early and Middle Jurassic Toodoggone Formation, Toodoggone Mining District, British Columbia, Ph.D. Thesis, University of Western Ontario
Chinapintza Mining Corp. (2020-09-18): NI 43-101 Technical Report, Geological Introduction to Chinapintza Mining Corp.'s Ranch Gold Project, Toodoggone Region, British Columbia, Canada
Chinapintza Mining Corp. (2021-06-22): Amended Technical Report: NI 43-101 Technical Report, Geological Introduction to Chinapintza Mining Corp.’s Ranch Gold Project, Toodoggone Region, British Columbia, Canada