The geology of the Teako property is known only in a very general sense. The property is underlain by sediments (argillite, siltstone, greywacke, conglomerate) of the Bowser Lake Group. In the southwest part of the claim block, the Bowser Lake sediments are in contact with a northeast-trending fault-bounded block of coarse clastic sediments of the Kitsuns Creek Formation (part of the younger Skeena Group). The northern contact of the Skeena Group sediments is a major northeast trending fault, which appears to be an important regional control to zones of mineralization in the area. On the Teako property, the Belle Vue and Sunset occurrences are localized along this structure. The newly discovered stockwork/breccia zone also appears to be, in general, localized along this fault.
The Bowser Lake and Skeena Group sediments are intruded by, and hornfelsed by, intrusives of the Coast Plutonic Complex and/or perhaps other ages. A diorite intrusion is located approximately 400 metres to the north of the newly discovered stockwork/breccia zone. Rhyolite dykes are associated with mineralization in theWhiskey Creek area, on the southeast side of the Skeena River, in the vicinity of the property.
The Teako property is located in the Bulkley Range, east of the Coast Mountains. It sits near the southern edge of the Bowser Basin, a 300 kilometre long by 200 kilometre wide sedimentary basin that formed along the North American continental margin during the mid-Jurassic. Sediments within the basin sit directly on the Devonian to Middle Jurassic rocks of Stikinia, a terrane which accreted to North America in the early to mid-Jurassic. The island arc volcanic rocks of the Upper Triassic Takla Group and Lower to Middle Jurassic Hazelton Group are part of Stikinia. These rocks are intruded by a series of Upper Triassic to Middle Jurassic intrusives (the Topley intrusions).
Clastic rocks of the Middle to Upper Jurassic Bowser Lake Group unconformably overlie the arc assemblages. The Bowser Lake Group is, in turn, unconformably overlain by marine and non-marine sediments of the early to mid-Cretaceous Skeena Group and the late Cretaceous Kasalka (and Sustut) Groups. Together these rocks form what is referred to as the Overlap Assemblage.
The Bowser Lake Group is a thick assemblage of marine and non-marine sediments, including shale, siltstone, sandstone and conglomerate, and minor inter-bedded andesite flows, breccias and tuffs. Sediments of the Bowser Lake Group were derived primarily from the oceanic Cache Creek terrane to the east, and were deposited in the Bowser Basin and in numerous smaller fault-bounded basins. Regional bedding is flat to gently dipping, although locally the sediments may be highly deformed.
A major hiatus in deposition occurred between the Jurassic and the Cretaceous. Early to mid-Cretaceous sediments were deposited south of the Bowser Basin, and include marine and non-marine sediments (greywacke, sandstone, shale, conglomerate, coal) and lesser volcanic rocks of the Skeena Group. Sediments and volcanics deposited south of the Bowser Basin in the late Cretaceous rocks belong to the Kasalka Group. East of, and in-part overlying, the Bowser Basin, sediments of the Sustut Group rocks were deposited in the Sustut Basin during the mid to late Cretaceous.
The Bowser Lake, Skeena, Kasalka and Sustut Group rocks are intruded by a series of late Cretaceous stocks and small batholiths of granodiorite to quartz monzonite composition, known as the Bulkley intrusions. The Bulkley intrusions occur within a belt some 300 kilometres long by 80 kilometres wide, which includes the Teako property, and are associated with a number of significant mineral deposits (i.e. Rocher Deboule, Huckleberry, Davidson).
The Bulkley intrusions are typically high-level, small to medium-sized bodies (usually 1-5 kilometres in diameter). Their final emplacement appears to have been structurally controlled, as the intrusives are commonly located along, or adjacent to, steep north to northwest-trending faults (Carter, 1981). Local doming of country rock occurs adjacent to some intrusions. Contact aureoles typically extend outwards for 400-1000 metres from the margins of intrusions.
Late Cretaceous and Tertiary intrusives of the Coast Plutonic Complex, widespread west of Terrace, occur with decreasing abundance, east to the area of the Teako property. A small intrusive of the Coast suite is mapped in the Cedarvale area, south of the property and southeast of the Skeena River. Intrusives in the Seven Sisters area also belong to the Coast suite of intrusives.
Calc-alkaline volcanic rocks of the Eocene-aged Ootsa Lake and Eocene to Miocene Endako Groups in part overlie the earlier rocks. The granodiorite, quartz diorite and quartz monzonite Babine suite of intrusions were also emplaced during the Eocene, and are age-equivalent to the Ootsa Lake Group. The Babine intrusives occur as stocks, dikes and sills, and their emplacement is commonly fault controlled. Regionally, copper-gold and molybdenum porphyry style mineralization is associated with these intrusives (i.e. Bell, Granisle, Morrison, Louise Lake, Mount Thomlinson). High-grade vein-type mineralization is also associated with the Babine intrusives (i.e. Silver Standard).
The most prominent regional structural feature is a series of major north-northwest trending block faults which have controlled the location of the major mountain/valley systems, as well as many of the intrusives and mineral deposits.
OWLHEAD MINERALS CORP. CLAIMS