The 209 ha Finex Property lies in the Pelly Mountains of the southern Yukon, 140 km east of Ross River, Yt. It is prospective for Sedimentary Exhalative (“SEDEX”) and Volcanic Massive Sulphide (“VMS”) deposits and is accessible by helicopter from the nearby Robert Campbell Hwy, 18 km south.
The property is owned 100% by Eagle Plains with no underlying royalties or encumbrances.
- Numerous untested geochemical anomalies
- Untested high-priority geophysical targets associated with favourable geology
- Favourable geology for hosting a significant SEDEX/VMS deposit
- Encouraging exploration to date
- Comprehensive database including historic drill-holes by Cominco
The Finex claims are underlain by Devono-Mississppian Earn Group clastic sediments dominated by grey to black clastic mudstone, siltstone and chert. Polymictic chert pebble conglomerate to grit, occasional felsic volcanic tuff and volcaniclastic rock units are interbedded with the siltstone-mudstone sequences. Silurian to Devonian basinal to transitional carbonates beds, mainly dolomite and sandy dolomite, form a minor component in the regional sedimentary succession.
Outcrop exposure on the Finex claims is very poor and is found mainly in creek banks and on some hilltops with little glacial till covering them. A distinctive marker bed and macrofossils are absent in the basinal strata underlying the claims. This generates significant uncertainty when positioning individual outcrops in their proper stratigraphic context.
The primary structural geology features on the property are faults and folds. Abrupt geological changes in bedded rock units show the presence of normal faults having a 10-30 meter displacement. The siltstone-mudstone strata are commonly contorted into small amplitude open folds where exposed in the banks of Fin Creek.
Metamorphic grade is low, usually lower to sub-greenschist. Regional metamorphism has produced phyllites characterized by metamorphic minerals such as sericite. This is likely a thermal product related to the intrusion of the granitic to syenitic Cretaceous plutons in the region.
The original Fin claims were staked in 1978 by Cominco Ltd to cover anomalous silt geochemistry discovered during a regional silt sampling program. Geological mapping, soil/silt geochemistry and trenching in 1978 and 1979 identified several showings of high grade stratiform Pb-Zn mineralization hosted within black carbonaceous and pyritic mudstone and siltstone outcropping along the banks of Fin Creek. Historic chip samples of mineralized outcropping in Fin Creek returned grades up to 30.3% Zn, 12.5% Pb and 3.0 oz/t Ag over 0.3 m.
Between 1980 and 1996 Cominco conducted extensive exploration on the claims and surrounding area including mapping, geochemical and geophysical surveys and diamond-drilling. Cominco did no more work after 1996 and eventually let the claims lapse. Core from drill programs is stored on the property.
Eagle Plains Exploration
The 2007 exploration program completed by Eagle Plains Resources consisted of outcrop chip sampling and sampling of historic diamond drill core. Historic drill logs were digitized to enable further geological analysis and the units formerly classified as arkosic sandstones and grits are now re-interpreted as felsic volcanic tuffs and tuffaceous sediments. This re-analysis suggests that an additional genetic exploration model be considered for the Fin property where there may be a volcanigenic massive sulphide component present. Geochemical analyses of the mineralized carbonaceious mudstones containing elevated Zn-Pb contents and sulfide showings confirm that a productive sub-basin is underlies the area. Chert-pebble conglomerates indicate an active rifting environment associated with felsic volcanic tuffs and an anoxic, pyritic, carbonaceous, Zn-Pb mineralized sub-basin is ideal for the development of an economic zinc-lead deposit. The presence of elevated lead, manganese and phosphorous contents in some of the basinal rock samples is an important feature for future geochemical programs.
The results from 2007 confirmed that laminated SEDEX style Zn-Pb-Ag-Fe mineralization occurs as fine- to very-fine grained, sphalerite-galena-pyrite and sphalerite-pyrite layers and laminations within black, carbonaceous mudstone to silty mudstones deposited within a third order sub-basin. The Zn-Pb mineralization is usually coincident with siliceous portions of the carbonaceous mudstones in drill core.
The 2009 field work on the property completed by Eagle Plains Resources consisted of infill soil sampling lines of the historic soil grid from 1979 as well as some limited geological mapping in area of the historic mineral occurrences. The short program was completed from a fly camp located at the historic camp and drill core storage area. The program was able to expand and infill detail on the 1979 Cominco grid. Bedrock exposure was extremely limited, which hindered the mapping efforts but structural measurements were taken in an attempt to better understand the basin topography.
2013 - Eagle Plains Program
In 2013, all of the historic Cominco drillholes (13 holes / 2353 m) were compiled into a Microsoft Access database. The down hole lithology was categorized in terms of overall basin topology and grain size, with mudstone/silty mudstone at the base with the finest sediment size, shallowing out to siltstone, sandstone and conglomerate in that order. The correlation was an effort to begin the process of better understanding the underlying basin geography to ultimately identify areas of 3rd order basins and depressions where SEDEX mineralization could accumulate in the quieter environment. The variation in the lithologies along section suggests complicated basin geography with structural features affecting correlation across drill holes.
More work is warranted on the Finex Property including:
- Continue compilation of historical data into a GIS format
- Identify second and third order sub-basins
- Re-interpret the geology to account for VMS attributes and locate volcanic vents
- Complete differential GPS survey of historic drill collars and key geological contacts
- Conduct geochemical sampling to target geophysics and drilling
Eagle Plains - A Project Generator
Eagle Plains Resources is a project generator with mineral exploration properties of merit that meet qualifying transaction requirements. The Finex 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 firstname.lastname@example.org or Mike Labach at email@example.com or call 1 866 Hunt Ore (486 8673).
Updated August 12, 2020