The Fab 49 occurrence is located about 5 kilometres south of Troitsa Lake approximately 105 kilometres south-southwest of the community of Houston.

Porphyry copper mineralization is associated with a sub-circular, porphyritic, hornblende biotite granodiorite stock of the Late Cretaceous Bulkley Plutonic Suite. The stock is primarily bounded by a dacite porphyry lacolith and cuts Lower Jurassic Hazelton Group rocks on its western edge. Mineralization consists of chalcopyrite, pyrite and molybdenite in quartz vein stockworks and sulphide-filled micro-fractures. Pervasive biotite-orthoclase alteration is associated with this mineralization. Chalcopyrite-magnetite-biotite stringers are also present.

In 1987, samples were collected from the Fab 49 area where Amax had drilled three holes in the stock in 1972. No results from the drilling were reported.

Much of the work done by Callinan Mines (Callinex) covers ground over or near the locations of all the following Fab showings: Fab (093E 041), Fab 49 (093E 042), Fab 44 (093E 043), Fab 45 (093E 044), Samuel (093E 104). The Callinex assessment reports provide maps of work done and raw data but do not summarize mineralization or provide information based on discrete zones or showings. The 2102 ZTEM airborne survey covered all the showings of the original Fab group and those of the Troitsa prperty as well, which include: Troitsa (Lake) (093E 003), Troitsa (Main) (093E 005) Troitsa (Cirque) (093E 009), Troitsa East (093E 129). Much of the Callinan drilling was between Fab 49 and Fab (093E041).

Refer to Fab (093E 041) for related geology and property work history details.