The Ann copper occurrence is located in the headwaters of Racing River, approximately 11.5 kilometres east-northeast of Churchill Peak in the mountainous Muskwa Ranges of the Northern Rocky Mountains (Vail, J.R. [1957] - Thesis, Geological Map).

The occurrence is in a region known as the Muskwa Anticlinorium, a major structure characterized by large, folded thrust sheets that expose rocks as old as Middle Proterozoic (Helikian), as well as Paleozoic rocks (Geological Survey of Canada Map 1343A; Geological Society of America, Geology of North America, Volume G-2, page 639). All belong to Ancestral North America (Geological Survey of Canada Map 1713A). The Middle Proterozoic rocks are pre-Windermere Supergroup and are known as the Muskwa Assemblage (Geological Society of America, Geology of North America, Volume G-2, page 111). This assemblage of carbonate and clastic rocks has been divided into seven formations. The Ann showing is in the Aida Formation, a 1200- to 1800-metre-thick succession of dolomitic mudstone and siltstone; dolostone and minor mudstone, sandstone and limestone (Geological Survey of Canada Memoir 373, Paper 67-68).

Although no details are available, the Ann is typical of several minor copper showings in this anticlinorium, all of which occur in quartz-carbonate veins (Vail, J.R. [1957] - Thesis). The veins fill fractures, generally spaced a few metres or tens of metres apart. Individual veins are approximately 50 centimetres wide, and most cannot be traced very far. In many cases, the quartz-carbonate veins lie along the contacts of basic dikes (gabbroic dikes on Geological Survey of Canada Map 1343A) or near them, and here the zone of fracturing may be approximately 6 metres wide. Such fracture zones associated with dikes can locally be traced intermittently for approximately 350 metres.

Copper mineralization in the veins is sporadic and comprises chalcopyrite and, where weathered and oxidized, malachite. Only very minor, secondary chalcocite and limonite are present.

The mineralization is clearly structurally controlled given its association with the fracture-filling veins, which consistently strike north-northeast to north-northwest, and dip subvertically. Many of the copper-bearing veins in the region occur within a few kilometres west of the front of a large northeast-verging thrust, near the base of its hangingwall, and they may be related to subsidiary fracturing. This would imply that the mineralization is Upper Mesozoic to Paleogene or Neogene, the age of the thrusting (Vail, J.R. [1957] - Thesis). Alternatively, the veining and mineralization was contemporaneous with the basic dike intrusion, which is demonstrably Precambrian (Geology, Exploration and Mining in British Columbia 1971).

Work History

In 1979 and 1980, Halferdahl & Associates Ltd. completed a regional program of soil sampling on the area as the Tuchodi property.

In 2005, Twenty-Seven Capital Corp. completed a regionally extensive program of geochemical (rock, silt and soil) sampling and a 9002.0 line-kilometre airborne magnetic survey on the area as the Muskwa property. Two float samples (B374201 and B374208) of brecciated quartz hosting semi-massive pyrite and chalcopyrite, located approximately 7 kilometres south and 5.5 kilometres east of the Ann occurrence, yielded 13.75 and 6.29 per cent copper, respectively (Assessment Report 28281).

Also in 2005, Action Minerals Inc. and Aries Resource Corp. completed a program of prospecting on the area as the Annabelle claims of the Trident Copper project.