Jeesiö Gold Project
The Jeesiö properties are positioned along major regional structures known as the Sirkka Shear Zone and the Venejoki Shear Zone. Both represent major crustal structures that control the emplacement of the majority of the orogenic gold deposits in Lapland. Portions of both structures are interpreted to cross the Jeesiö property.
With a total reported gold endowment of only 9.1 million ounces, The Central Lapland Greenstone Belt (CLGB) remains severely underexplored for orogenic gold deposits.
Studies suggest there could be as much as 30 times the currently known gold resources in the CLGB1.
Since 2017 FireFox has used a combination of data compilation, till sampling and mechanized BOT sampling, to identify numerous promising targets at Jeesiö, and has currently prioritized the Utsamo and Katajavaara Targets. Utsamo is situated directly between Aurion’s recent Risti and Launi gold discovery areas, while Katajavaara is only two kilometres southwest from the gold-bearing quartz-sulfide vein system at Launi.
Utsamo Target: This target represents a 2.8 km long structurally distinct zone, associated with numerous gold anomalies in till, that follows the contact between mafic intrusive rocks and metasediments. This feature is believed to be the continuation of the Sirkka Shear Zone.
Katajavaara Target: TThis new target is located nine kilometres south of the Utsamo target. It hosts significant gold in surface samples, including one quartz-sulphide vein sample with 6.4 g/t gold. The target appears to be related to the Venejoki Shear zone.
2020 exploration work to advance these and other targets at Jeesiö includes geophysical surveying, bottom-of-till (BOT) sampling and additional surface sampling. The data from this work will be compiled to define additional drill targets.For details on the program in progress please refer to the News Releases or the latest Presentation.
Location, Access and Infrastructure
The Jeesiö project is in Lapland, the northernmost province of Finland. The entire property is accessible via paved highway and secondary paved roads. The nearest towns are Sodankyla (pop 8,556) and Kittilä (pop. 6,358). High voltage power lines cross the property.
The northern boundary of the Jeesiö exploration permit application is three kilometres south from the recent Aamurusko (Risti) gold discovery by Aurion Resources Ltd (TSX-V:AU www.aurion.com), and 12 kilometres south-southwest from the Pahtavaara Gold Mine, currently being recommissioned by Rupert Resources Ltd (TSE:RUP www.rupertresources.com). Numerous smaller drilled prospects and deposits are in the vicinity of Jeesiö.
FireFox cautions that proximity to a discovery, past-producing mine, or mineral resource, does not indicate that mineralization will occur on FireFox’s property, and if mineralization does occur, that it will occur in sufficient quantity or grade that would result in an economic extraction scenario. Results from other companies in Finland, including properties proximal to those controlled by FireFox, are not indicative of expected FireFox results,as there has been insufficient exploration on the properties held by FireFox. These facts were simply used to help prioritize the acquisition of these properties.
The Jeesiö Project is comprised of approximately 279 km2 of property holdings, including the 100% owned 222 km2 Vaalajarvi exploration reservation.
FireFox is earning a 100% interest in the remaining Jeesiö properties from Magnus Minerals per the agreement described in the August 1, 2017 news release. The agreement requires a combination of common shares issuance (completed) plus $250,000 cash and $2.5M in exploration expenditures over a three-year period. Magnus Minerals retains a 1.5% NSR which may be reduced by 1% in return for the payment to Magnus of 1000 troy ounces of gold. The agreement also includes properties in the Riikonkoski and Ylöjӓrvi Projects.
- The GTK (Finnish Geological Survey) covered the area in a Country-wide reconnaissance till sampling program between 1983 and 1991. The sample density was 4 km2 per sample.
- 11 samples on the Jeesiö property exceeded the 95th percentile for gold contents in the Finland-wide survey but no follow-up work was reported.
- Outokumpu drilled four holes in the Kotalampi anomaly totalling 419.5 metres in 1990. This anomaly was identified by three nugget-in-till samples which exceeded the 99th percentile of the GTK Survey.
- The Outokumpu holes intersected narrow zones of strong fuchsite alteration but reported no samples with more than 0.3 g/t gold.
- Between 1972 and 2007 the GTK flew a Finland-wide, low-level airborne magnetic, EM and radiometric survey along lines spaced 200 metres apart.
- The GTK drilled 33 short holes on the Jeesiö property between 1999 and 2006 (all less than 51 metres and many less than 10 metres). This was presumably done to verify bedrock lithology.
- There are no historical mineral resource or reserve estimates on the Jeesiö property and there has been no significant production from it.
Work Completed by FireFox to Jan 2020
2017: FireFox acquired the property in August of 2017 and performed reconnaissance till sampling using a handheld Cobra drill. FireFox collected 284 samples from depths of 0.2 to 6.0 metres.
2018: FireFox performed Bottom of Till Geochemical sampling as well as ground-based geophysics identifying priority targets.
2019: FireFox completed additional bedrock sampling and mapping throughout the project, as well as trenching at the Homelampi target. Ground geophysical surveys and geochemical sampling programs were completed at the Utsamo target, followed by a 3-hole reconnaissance drill program.
There has been no geologic mapping reported on the Jeesiö property. Most of the project area is covered by a few metres of glacial till and outcrop is very scarce. Regional mapping is largely based on geophysical interpretation. GTK’s regional 1:200,000 mapping program indicates that much of the property is underlain by Archean-aged clastic sedimentary rocks which is intruded by younger Paleoproterozoic-aged gabbro sills and granitic rocks.
In Orogenic-type deposits, structure controls gold emplacement. Most of the Jeesiö property lies south of the Venejoki structure. Only a few sections of the property are situated to the north of the Venjoki structural break. In this area, the property is underlain by quartzite and Paleoproterozoic-aged gabbro sills as well as biotite paraschist and mafic volcanic rocks.
The Venjoki structure is over 100 km long and lies 5-to-25 km south and is subparallel to the Sirrka structure. The Venjoki structure represents a thrust zone where Paleoproterozoic and Archean-aged rocks were pushed northward over the Central Lapland Greenstone Belt. North to NE strike-slip shear zones related to this regional thrust are associated with several gold occurrences in the region.
Typically in Orogenic-style deposits in greenstone environments host gold bearing veins that are enveloped by alteration haloes consisting of iron-carbonate + sericite + sulphide to various amounts of chlorite, calcite and locally magnetite. Pervasive chromium-or vanadium rich green micas (fuchsite and roscoelite) as well as ankerite with zones of quartz carbonate stockwork are also common in shearedd ultramfic rocks.
For additional details, please refer to the Technical Report.
1Niiranen,T., I. Lahti, I., Nykanen, V.(2015) The Orogenic gold potential of the Central Lapland Greenstone Belt, Northern FennoscandianShield. In W.D. Maier, R. Lahtinen, H. O’Brien, Eds., Mineral Deposits of Finland (pp733-752). Elsevier Inc.