Summary:
The Tower Gold Project to date is host to nine gold deposits, six from the Golden Highway property and three from the Garrison property. Most of the gold occurrences are found within a corridor parallel to the Destor Porcupine Fault Zone DPFZ. The nine gold deposits include South West, Westaway, Windjammer South, Windjammer Central, Discovery, 55 Zone, Garrcon, 903 and Jonpol.
These deposits have been classified as structurally controlled orogenic gold deposits in an Archean greenstone belt setting. Gold mineralization is greenstone- and sediment-hosted and generally spatially related to quartz-carbonate veins. These veins are hosted by moderately to steeply dipping, compressional, brittle-ductile shear zones and faults with locally associated extensional veins and hydrothermal breccias.
Gold occurs in a complex system of lode veins, stockwork veins, microfractures, and breccias hosted in a zone of brecciated and silicified metasediments, metavolcanics, and in some cases syenitic intrusions. The main sedimentary host package shows little variation, mainly including fine- to coarse-grained sandstones, siltstones, as well as minor mudstone layers. The veins are composed predominately of quartz-carbonate (calcite, dolomite and ankerite) with and without albite. The stockwork veins are normally less than one centimetre in width with many being only a half centimetre wide or less.
Southwest Deposit
The Southwest deposit (including the former Gap area) comprises a series of mineralized extensional veins and stockwork veins. The regional BIF at the Southwest deposit is a banded jasperoid-hematite-magnetite formation varying in thickness from 1 m up to 25 m. It has been traced for approximately 5 km, from the 55 deposit to the eastern boundary of the property.
The vein arrays and stockwork dip shallow to moderately to the southwest at 30° to 40°. The veins and associated stockwork zones generally have an average width of approximately 2.8 m and up to 25 m in proximity to the regional BIF. These mineralized structures generally occur 25 m to 30 m apart. The vein arrays and stockwork zones can be traced for 300 m to 400 m southeast from the southern regional BIF contact.
In proximity to the southern contact of the BIF, the vein arrays expand into stockwork zones and are up to 25 m wide in the porous coarse greywackes. The stockwork of quartz-carbonate-pyrite veins (3% to 20% veining) occurs within a distinct ankerite-silica alteration halo occasionally with sericite. Gold mineralization occurs associated with pyrite in the veins and vein alteration halos, as well as visible gold.
Westaway Deposit
The Westaway deposit (formerly the Westaway/West Block deposit) is located between the Southwest deposit and the 55 deposit, south of the south branch of the DPFZ. It is essentially a continuation of the Southwest deposit west of the Main Fault.
In the West Block area, a set of twelve vein corridors (WB1-WB12) have been outlined, dipping at 60° to 70° southwest. The easternmost corridors have been terminated by the slightly steeper southwest dipping (50° to 60°) Main Fault. The West Block vein corridors are generally open below a vertical depth of 600 m. They currently strike a distance of 200 m southeast from the regional BIF units to the Golden Highway gabbro and are open south of the gabbro.
Contiguous to the west of the West Block area, 18 vein corridors have been defined to date at Westaway (WA-1 to WA-18). They dip 60° to 70° to the southwest and strike southeast over a distance of 350 m, from the regional BIF units to the Golden Highway gabbro. They are open along strike southeast of the Golden Highway gabbro and at depth below 600 m vertically.
55 Deposit
The 55 deposit is located 2 km along strike, west-southwest of the Southwest deposit. It hosts gold mineralization in a similar geological setting to Southwest, within Timiskaming clastic sediments between two iron formation horizons, the northern one being the regional BIF-B along the ultramafic to mafic volcanic contact and the southern being the haematitic IF-C horizon.
The 55 deposit is host to two main sets of quartz-carbonate veins resulting in a set of steep zone wireframes and shallower (flat) zone wireframes. The steep zone wireframes trend 255° and dip 60° to 70° to the north. The shallow (flat) zone wireframes trend 255° and dip 20° to 30° to the north. These shallow zone wireframes outlined at the 55 deposit are amendable to open pit mining.
Windjammer Deposit
The Windjammer deposit (comprising the Windjammer South, Windjammer Central deposits, and the Halfway
Zone) is located within Timiskaming sediments centred on the regional oxide facies BIF. The mineralized stockwork zones and vein structures at Windjammer occur in the fine to coarse grained greywackes both north and south of the central BIF units.
Garrcon Deposit
The Garrcon deposit, located in Garrison Township, comprises a broad zone of low-grade gold mineralization that includes local higher-grade areas.
Gold occurs primarily as native gold within the stockwork veins with minor dissemination into the vein walls. Higher grade intersections (above 10 g/t) are frequently intersected in intervals where pyrite makes up much less than 1% of the total rock. The principal minerals are native gold, pyrite, magnetite, specularite, and pyrrhotite with subordinate chalcopyrite, sphalerite, galena, and arsenopyrite. Pervasive wall rock alteration is common adjacent to the veins, usually consisting of carbonatization (ankerite or ferroan dolomite) and minor sulphides (pyrite and pyrrhotite).
Jonpol Deposit
Jonpol gold mineralization is generally associated with pervasive carbonate alteration with late stage silicification, sulphidization (pyrite and arsenopyrite) and sericitization, giving the altered rock a pale beige to pale purplegrey hue.
The mineralized structures strike approximately 070° (true north) and dip steeply to the south. The Jonpol deposit has a combined strike length of 2,000 m. The mineralized structures have been intersected from surface to a maximum vertical depth of approximately 750 m below surface. True widths of mineralized structures vary from 1.5 m to greater than 10 m.
903 Deposit
Accessory sulphide minerals associated with anomalous gold grades are reported to include pyrite, hematite, chalcopyrite, molybdenite and galena. The presence in hornblende altered mafic volcanic rocks and quartz-biotite-cordierite schists and/or gneisses may be a contact metamorphic aureole around the Garrison Stock, located several hundred metres south of the 903 deposit.
Other Gold Zones
In addition to the above nine gold deposits, the Tower Gold property currently hosts multiple distinct gold-bearing zones (including Landing, Twin Creeks, LC, Dyment 3, and Western from east to west) in the Michaud Township. At present, there is insufficient drilling in the zone areas to complete an interpretation and resource estimate on them.