The 1881 ha Bear Twit Project is located in the Mackenzie Mountains of the NWT on the Twitya River, 186 km SE of Norman Wells, NWT. Access is by helicopter from the Willowhandle exploration camp, 20 km to the NE, which is serviced by twin engine float plane from Norman Wells.
The Bear Twit deposit is correlative to Mississippi Valley-type (“MVT”) and Irish-type deposits as it has similar dolomite sequences, mineral textures, breccia textures, and ore mineral composition. Showings at the Bear-Twit contain sphalerite, galena, and tetrahedrite. The main showing consists of a high grade sphalerite and galena breccia infill with bedding parallel galena, tetrahedrite and sphalerite mineralization extending away from the showing.
The property is owned 100% by Eagle Plains Resources with no underlying royalties or other encumbrances.
- Numerous mineralized occurrences
- Excellent geology favourable for carbonate-hosted MVT and Irish-type base-metal deposits
- Untested high-priority coincident geochemical and geophysical targets associated with favourable geology
- Encouraging exploration to date with comprehensive database
- Historical high-grade mineralized drill intercepts
Regionally the geology consists of interlayered sequences of dolomite, limestone, and siliclastic units of Silurian to Devonian age. The basinal sediments were deformed into a large-scale fold and thrust belt by a Cretaceous orogeny.
The Bear Twit sits in the eastern limb of a broad, open anticline. A central fold sits on the property in the footwall of a thrust. The geometry of the property is complex requiring the supposition of lateral thrust ramps or complex faults.
Two main mineralized zones occur on the property: the Delorme A and B deposits, both hosted in dolomitized rock. The Delorme deposit A is dominated by sphalerite, with only minor occurrences of galena, tetrahedrite-tennanite and barite, while the Delorme deposit B is composed mainly of galena, tetrahedrite-tennanite and barite with little to no sphalerite.
Mineralization is found within both the Delorme and Whittaker Formations, but the majority is in the Delorme. Away from these main showings, mineralization within the Delorme Formation consists of mainly galena and tetrahedrite in quartz-carbonate veins. In the Whittaker, sphalerite lines calcite veins and fills the center of calcite lined vugs. Sphalerite is associated with intense dolomitization while galena and tetrahedrite-tennanite are associated with barite. Both deposits sit in the footwall of the thrust and the absence of mineralization in the folded units of the footwall, indicate that the thrusting and the mineralization are unrelated. However, the mineralization is likely ramp controlled due to its proximity to the thrust, which provides a more permeable zone for fluid flow.
1973 - Welcome North Mines stakes the Twit Claims and options to Cominco. Geological mapping, prospecting and soil sampling in addition to small core drilling of 285 m over 14 holes
1972 - Bear claims staked to cover sphalerite and galena showings. Prospecting and surface sampling completed by Arrow Inter-American
1974 - Cominco drills 595 m over 4 holes and calculates a 43-101 non-compliant historical resource of 8.0 Mt at 3.4% Zn-Pb.
1975 - Bethleham Copper drills 855 m over 6 holes to test depth and extension of surface mineralization. No further work is carried out until Eagle Plains acquires the prospecting permit over the area in 2005
Highlights from the 24 drill holes includes:
||8.97% Zn, 6.26% Pb and 76.8 g/t Ag
||10 % Pb-Zn
||3.92 % Zn, 1.56 % Pb and 164.8 g/t Ag
||66.9 % Pb, 3.72 % Zn and 809.6 g/t Ag
Eagle Plains Exploration
Reconnaissance exploration programs in 2005 and 2006 evaluated multiple NWT prospecting permits that covered extensive areas. The Bear Twit Claims were staked within one of these permit areas after historical trenches were chip sampled for isotopic analysis and sampling at the Main Showing returned up to 10.6 % Zn and 1.1% Pb.
Eagle Plains 2007-2008 Exploration Program
The Bear-Twit Claims were staked and a focused program of geologic mapping, soil sampling, and prospecting was conducted. The program identified a distinct trend of mineralization between the Main Showing and Pb-Zn soil anomalies located to the SE. Trending to the ESE, the mineralization appears to continue over a strike length of 1.8 km. The anomalous soils are not completely continuous indicating mineralization may be at greater depths and thus undetectable at a few locations. Creek silt samples on the other side of the valley to the Bear Twit were highly anomalous in Pb and may indicate some outboard mineralization.
The 2008 exploration program consisted of an undergraduate thesis which studied dolomitization and its relationship to mineralization as well as the structural setting at the depsoits types. Mineralization was found to post-date a local thrust fault event and is primarily located in the footwall of the structure.
Recommended exploration work includes prospecting to determine the source of the lead anomalies in the silts across the valley from the Main Showing. Detailed mapping and infill soil sampling are required to define diamond-drill targets around the Main Showing and along the mineralization trend defined by soil geochemistry. All historic drill data should be brought into a digital format and modelled in 3D for better interpretation of the style and orientation of mineralization.
Eagle Plains - A Project Generator
Eagle Plains Resources is a project generator with mineral exploration properties of merit that meet qualifying transaction requirements. The Bear Twit Property is available for option to joint-venture partners. We facilitate the listing process for capital pool companies and initial public offerings while providing technical expertise for exploration programs. Companies interested in co-operatively exploring any of these projects please contact: Tim Termuende at email@example.com or Mike Labach at firstname.lastname@example.org or call 1 866 Hunt Ore (486 8673).
Updated June 3, 2016