The Acacia Property is located on the Adams Plateau area of British Columbia, approximately 60 km NE of Kamloops and 22 km east of the town of Barriere. The 4633 ha property was staked by Eagle Plains in 1999 covering a stratigraphic package that hosts a number of base- and precious-metal deposits. The claims are owned 100% by Eagle Plains with no royalties or other encumbrances. Access is by a network of all-weather logging and historical roads.
Work by past operators on the Acacia Property has identified well-developed volcanogenic massive sulphide (“VMS”) mineralization and alteration hosted by the Lower Cambrian to Devono-Mississippian Eagle Bay Formation, the property has high potential for hosting VMS-style deposits.
- Adjacent to the past producing Homestake and Samatosum Mines
- Numerous high-grade showings, geochemical and geophysical anomalies
- Excellent geology/alteration favorable for polymetallic VMS deposits
- Excellent infrastructure including numerous forestry roads and nearby hydro & rail
- Encouraging exploration to date
The Adams Plateau area is underlain by metavolcanic and metasedimentary rocks of the Eagle Bay Assemblage of the Kootenay Terrane. The Kootenay Terrane and correlative rocks of the Yukon-Tanana Terrane farther north comprise dominantly Paleozoic sedimentary and volcanic rocks that are inferred to have been deposited on the distal western edge of ancestral North America.
The Eagle Bay assemblage comprises Lower Cambrian to Mississippian rocks that are intruded by Late Devonian orthogneiss and Jurassic-Cretaceous granodiorite and quartz monzonite of the Raft and Baldy batholiths. Within the Acacia Property area the Eagle Bay Assemblage is contained within four west directed fault slices. The assemblage consists of clastic metasedimentary rocks, mafic metavolcanic rocks and limestone and structurally overlying clastic metasedimentary rocks, with minor carbonate and volcanic rocks, all of which are interpreted to be Cambrian in age. These are in turn overlain by Devonian-Mississippian mafic to intermediate metavolcanic and metasedimentary rocks.
The central part of the Acacia Property borders the historic Homestake Mine Crown Grants, which have undergone sporadic exploration and production by various operators since 1893. Exploration peripheral to the Homestake deposit by a host of companies since the mid 1970’s has identified well-developed volcanogenic massive sulphide mineralization and alteration within the property wide Lower Cambrian to Devono-Mississippian Eagle Bay Assemblage.
||249,906 t grading 0.6 g/t Au, 226 g/t Ag, 36.7% Ba, 0.28% Cu, 1.24% Pb, 2.19% Zn and 0.58 g/t Au
In 1987 Esso Minerals discovered the centrally positioned historic Acacia area showings. These showings consist of at least eight massive sulphide and vein occurrences. The following year Esso Minerals conducted grid soil sampling, mapping and ground VLF geophysical surveying. Exploration to the north of the Twin Mountain zone in 1983 and 1986, outside of the current project boundaries, resulted in the following discoveries of volcanogenic massive sulphide lenses and vein deposits:
||242,000 t grading 6.5 g/t Au, 73 g/t Ag and 4% Pb-Zn, and
||133,000 t grading 5.4 g/t Au, 62 g/t Ag and 5% Pb-Zn
||353,129 t grading 1.8 g/t Au, 1,215 g/t Ag, 1% Cu, 4.1 Pb-Zn
||375,000 tonnes grading 4 g/t Au, 55 g/t Ag, 0.5 % Cu, 4.8 % Pb, 6.1% Zn
This was followed by Esso Resources and Homestake Mining exploration programs which were successful in tracing the Rea and Samatosum mineralized trends southeasterly over kms of strike length. The Acacia Property covers the inferred strike extension at the Twin Mountain area.
The Acacia Zone consists of eight known sulphide mineralization occurrences over an area 1.6 km by 1.2 km. Associated with this zone are extensive alteration packages of chlorite, sericite, silica and epidote, all alteration patterns associated with VMS deposits, along with coincident anomalous values for Cu, Pb, Zn and Ag in soil geochemical samples within a zone 1.5 km by 250 m. This zone is hosted by Eagle Bay Formation felsic volcanics, mafic volcanics and calcareous schists. Rock grab samples from this zone have returned results up to 191.3 g/t Ag, 0.8% Cu, 22% Pb and 6.7% Zn.
Twin Mountain Zone
The Twin Mountain Zone consists of two northeast dipping conformable lenses of mineralized grey pyritic and calcareous chlorite-sericite-quartz schists enclosed within darker green chlorite schists.
Galena-sphalerite-pyrite-chalcopyrite mineralization occurs within carbonate-quartz-barite lenses concordant to the schistosity. The carbonate is mainly dolomite with lesser calcite and siderite. The lenses range up to several metres thick and contain disseminations to massive pods, up to 30 centimetres wide, of galena and sphalerite.
Historic drilling of the lenses have returned grades as high as 2.37 m of 10.6 g/t Au, 335.3 g/t Ag, 3.13% Zn, 2.74% Pb and 0.55% Cu. Historic workings also include two adits that extend to a depth of greater than 50 m, a number of trenches from a 1989 program and geochemical surveys that have identified anomalous signatures for silver, zinc and lead along strike to the northwest and southeast of the known occurrences.
Eagle Plains Exploration
The Acacia Zone showings were the focus of work in 2000 which consisted of contour and grid soil geochemical surveys. The results outlined anomalous base-metal signatures proximal to and on trend with the linear trace of historical adits and mineral occurrences.
Since then, ground-based exploration programs have been completed by Eagle Plains and partners in 2007, 2008 and 2010. These programs consisted of prospecting, geological mapping, geochemical sampling and a geophysical survey that identified a number of targets as potential intrusions, mineralization and structures.
2012 Field Program
In May 2012, a 6 hole - 616 m drill program was carried out to test the Acacia Zone sulphide showings and a large multi-element soil geochemical anomaly associated with a magnetic geophysical anomaly.
Although the exploration drilling at the Acacia Zone did not intersect economic mineralization the results are very encouraging. The Acacia mineralization is associated with a very broad soil anomaly with coincident elevated and highly-elevated values for Pb, Zn, Cu and As. The degree and extent of alteration found, including chlorite, epidote, silica and sericite, all typical of VMS deposits, is indicative of a large mineralizing system. Mineralization was encountered in almost all of the holes indicating the presence of a widespread metal-bearing fluid system, including a 40 cm interval of massive pyrhhotite and pyrite found in hole 6.
Further exploration is planned for the property including:
- Detailed geological mapping
- Incorporation of airborne geophysical data with updated geological and geochemical information
- Additional geochemical surveys on the Acacia zone to refine existing anomalies
- Further diamond-drilling
Results of the 2012 drilling were highly encouraging. Massive sulphides encountered in one hole and alteration in every hole indicates the presence of a strong hydrothermal mineralizing system warranting further investigation.
Eagle Plains - A Project Generator
Eagle Plains, a project-generator company, makes this project available for option to joint-venture partners. 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 October 11, 2016