The Tee fluorite prospect, situated within the Tee 3, 5, 16 and 18 claims, is located just west of Teeter Creek, 5 kilometres east-northeast of Mount Halkett and 20 kilometres north of the settlement of Liard River on the Alaska Highway (Assessment Report 3975, Maps 5, 10). It is part of one of the most important areas of fluorite mineralization in British Columbia.

The region is underlain by Lower to Upper Paleozoic, platformal sedimentary rocks of Ancestral North America (Geological Survey of Canada Maps 46-1962, 1712A, 1713A). The Tee prospect is one of many similar fluorite deposits in a 17-kilometre-long belt extending north from Liard Hot Springs Provincial Park. All the deposits in the belt occur at or just above or below the unconformity between the Middle Devonian Dunedin Formation and the Upper Devonian Besa River Formation. The Tee is the farthest north of the fluorite deposits in the belt, lying along the north-trending, moderately east-dipping contact between these units.

The Dunedin Formation consists of mid- to dark-grey, massive to thinly-bedded fossiliferous limestone. It is generally exposed in the Teeter and Mould creek valleys, which are characterized by karst and 'mesa and butte' topography. The overlying Besa River Formation is predominantly black shale or slate and argillite, with some calcareous shale and minor, buff-brown dolomitic layers. The unconformity between the units is generally marked by brecciation and is very irregular in detail, probably due to an erosional or disconformable relationship between them, or to later faulting along the contact (Assessment Report 3975; Geology, Exploration and Mining in British Columbia 1972). The mineral deposits in the Liard fluorite belt generally occur as lenticular replacement bodies or infillings in breccias in one or both of the units.

Mineralization at the Tee showing is generally concentrated at the Dunedin-Besa River contact, which dips approximately east at 25 degrees. Four zones, designated A to D, have been defined (Assessment Report 3975, Map 10). The most northerly is zone A, consisting of remnants of highly mineralized limestone breccia and lesser shale breccia. It has been mapped over an area of 90 by 67 metres. The best mineralization is 4.6 metres thick. Chip sample 2026 contained 73.4 per cent calcium fluoride (Assessment Report 3975). The fluorite is colourless, which is very unusual for the region.

Zone B is the largest sub-area, measuring 200 by 60 metres, and is also at the limestone-shale contact. The main mineralization consists of lenses of complete replacement of shale and limestone breccias by fluorite. Beneath it, the main Dunedin limestone is locally fractured and rich in veins and lenses of fluorite and some barite. Good mineralization occurs at the west end of the zone and has an aggregate thickness of 18 metres. Chip sample 2027 from here contained 44.2 per cent fluorite (Assessment Report 3975).

Mineralization at zone C is exposed around some limestone cliffs as discontinuous lenses of massive fluorite. Its volume is not significant.

Zone D is a small area of fluorite-bearing shale breccia with minor witherite. It may be significant because regionally, mineralized Besa River shale such as that at zone D tends to overlie strongly mineralized limestone breccia. This possibility was tested by diamond drilling; the results were encouraging but inconclusive (Assessment Report 3975). Drillhole number 63 intersected fluorite-bearing fractured limestone with an average grade of 8.8 per cent calcium fluoride over 18 metres (Assessment Report 3975).

More geochemical analyses are given in Open File 1992-16 (page 35), although it is not clear what zones they represent.

Fission-track studies of fluorite from the Gem prospect 16 kilometres to the south suggest that the age of the mineralization is 332 ± 56 Ma (Open File 1992-16).

In 1972, a diamond drill hole (72-63) yielded 8.8 per cent calcium fluoride over 18.3 metres (Assessment Report 34801).

In 2012, five samples (380002 to 380006) yielded from 26.7 to 75.8 per cent calcium fluoride (McCallum, N.G. [2012-12-12]: Technical Report on the Liard Fluorspar Project).

See the Tam (MINFILE 094M 005) and Gem (MINFILE 094M 002) occurrences for a completed work and exploration history of the area.