The Omega coal occurrence is located near Omega Hill about 102 kilometres southeast of the community of Tumbler Ridge.
The region is underlain by an assemblage of sedimentary rocks consisting mainly of continental margin and shelf facies rocks. This assemblage was deposited on and to the west of the ancestral North American craton. These sedimentary rocks, for the most part typical miogeoclinal facies, range in age from Hadrynian to Upper Cretaceous. Structurally these rocks are part of the Foreland Thrust and Fold Belt of the North American Cordillera.
The coal measures of the region occur mainly in Cretaceous sediments deposited unconformably on older miogeoclinal strata. These sediments were subjected to fold and thrust tectonics which also affected the older rocks.
The Gates Formation (Fort St. John Group) is the major coal-bearing unit of the area and consists of siltstone, shale, sandstone, conglomerate and several cycles of coal deposition. It is generally subdivided into four sub-units, termed the Upper Gates member, the Babcock member, the Middle Gates member and the Quintette member. The Quintette member, approximately 80 to 90 metres thick, consists primarily of massive, fine grained siltstones and sandstones. The Middle Gates, approximately 90 to 100 metres thick, consists of a series of fining-upward sequences that culminate in coal development, and hosts all of the economic coal seams of the Gates Formation. The Babcock member is a channel deposit sequence of massive sandstones, conglomeratic sandstones and chert pebble/granule conglomerates, averaging 20 to 30 metres thick. The Upper Gates member is a 30 to 40 metres series of shales and sandy shales with several thin, discontinuous coal seams. A very thin bed of ferruginous chert pebbles marks the top of the unit. Overall thickness of the Gates Formation is 270 to 300 metres.
Ten Gates Formation coal seams (numbered 1 to 10 from oldest to youngest) lie within a northwest trending band of tight to open folds associated with a moderately northeast dipping thrust fault sequence.
The Omega property is within the area of the Belcourt-Saxon (093I 014, 16) joint venture project of the Belcourt Saxon Coal Ltd. Partnership (Anglo American plc (50 per cent) and Walter Energy Inc. (50 per cent)).
In 2012, Walter Energy Inc. reported 28.5 million tonnes recoverable reserves (Proven and Probable) for the Saxon properties, classified as Prefeasibility, and a 2005 report estimated a resource of 53.1 million tonnes (Indicated - Saxon East) and 167.3 million tonnes (Inferred – Saxon East, South, and Omega) (Exploration and Mining in British Columbia 2013).
In 2006, exploration on the large Belcourt-Saxon coking coal project was conducted by operator Belcourt Saxon Coal Limited Partnership and was confined to the completion of air rotary drilling on the Belcourt South (Holtslander) property and geotechnical assessment of a potential access corridor. However, significant geological modeling, coal quality testing, scoping and feasibility studies were conducted throughout the year on all of the properties that comprise the Belcourt-Saxon project (i.e. Belcourt North, Belcourt South, Omega, Saxon East and Saxon South).