The Boomerang occurrence is located in the former Boomerang camp which consisted of the B.C. (Lot 725s), Boomerang (Lot 733s), Iconoclast (Lot 734s), Chaperone (Lot 875s), Balzac (Lot 876s), Tuck (Lot 877s), W.S. (Lot 2281) and Eagle (Lot 2282) Crown granted claims. All but the Balzac and Tuck are now of Reverted Crown status.
Regionally, hostrocks of the Boomerang occurrence consist of fault blocks of Middle Jurassic Nelson intrusions, Cretaceous to Tertiary Okanagan batholith intrusions and volcanics of the Eocene Penticton Group. Major faults follow a northeast and east trend.
On the Boomerang property, quartz diorite comprises rocks of the Nelson intrusions. It is medium grained and contains hornblende or biotite. The quartz diorite is most intensely altered adjacent to rhyolite dikes and along shear zones. Alteration consists of silicification as flooding, stockworks and narrow veins. Locally, quartz appears as a breccia cement. Pyritization is also widespread as disseminated pyrite and as fracture filling. The pyrite itself has been strongly oxidized to hematite, locally. Chloritic alteration comprises a regional alteration. Penticton Group volcanics include rhyolite porphyry with a predominance of plagioclase phenocrysts and locally hornblende or biotite. The rhyolite porphyry is seen as dikes in diorite, locally on the property. Mafic dikes are also present with alteration envelopes up to 10 metres wide.
Mineralization is hosted by two near parallel east trending quartz veins within a pyritic, chloritic and brecciated quartz diorite. The veins have been traced from the northeast corner of the Boomerang claim, southwesterly across the W.S., Eagle Fraction and B.C. claims. The veins which range in width from a few centimetres to two metres, are reported to outcrop over a distance of 600 metres on the Boomerang and W.S., and possibly up to 800 metres more including outcrops on the Eagle Fraction and B.C. The veins strike 030 to 047 degrees.
Mineralization includes pyrite, chalcopyrite and galena. Gold is found in quartz veins along shear zones and in quartz breccia, locally extending into host quartz diorite. Gold content is reported to increase with the galena content of the veins. The ore in general is irregularly disseminated in pockets and shoots.
On the Iconoclast (L.734S) Crown grant, located approximately 800 to 900 metres west of the previous zone(s), a north west dipping and north east (070 degree) trending, galena-chalcopyrite bearing quartz vein has been identified intermittently over a 200 metre strike length associated with a south east trending fault.
Rock samples taken during exploration programs have yielded good silver and gold values and are summarized as follows. On the Boomerang claim, dump sample 4006 yielded 51 grams per tonne silver and 5.14 grams per tonne gold (Assessment Report 6286). A 32-centimetre chip sample across the face of the vein returned 97 grams per tonne silver and 5.8 grams per tonne gold (Assessment Report 6286). These samples were taken in 1976. In the same year, sample 4004, taken from the northeast corner of the W.S. claim yielded 34 grams per tonne silver and 3.6 grams per tonne gold (Assessment Report 6286). Trench samples taken on the B.C. claim in 1986 yielded the following values. Sample 2107 returned 3.4 grams per tonne silver and 4.4 grams per tonne silver over 61 centimetres (Assessment Report 16671). On the Iconoclast, the average of three trench samples near the old shaft (Trench G) taken in 1986 were 1.61 grams per tonne gold over 1.7 metres (Assessment Report 16671).
In 2014, samples (14BM01 and 14BM02) from the W.S. and B.C. zones yielded 6.95 and 1.48 grams per tonne gold, 66.2 and 9.0 grams per tonne silver, 0.215 and 0.115 per cent zinc with 0.447 and 0.218 per cent lead over 1.25 and 1.20 metres, respectively (MacIntyre, D. (2016-11-10): Technical Report - Boomerang Gold-Silver-Lead-Zinc Property).
In 2015, sampling yielded values of up to 423.00 and 148.00 grams per tonne gold with 51.9 and 67.8 grams per tonne silver over 0.30 metre, respectively, from samples (20851 and 20854) of outcrop on the newly identified B.C.-Eagle zone; 8.125 grams per tonne gold, 59.7 grams per tonne silver and 0.754 per cent lead from an angular float sample (1504) in a former trench on the Eagle Fraction; 157.00 grams per tonne gold and 85.1 grams per tonne silver from a sample (20862) of outcrop on the Iconoclast zone and 195.00 grams per tonne gold, 70.3 grams per tonne silver and 1.67 per cent lead over 0.40 metre from a sample (20863) of outcrop on the W.S. zone (MacIntyre, D. (2016-11-10): Technical Report - Boomerang Gold-Silver-Lead-Zinc Property).
Work History
Work on the Boomerang occurrence dates back to 1899, on the Iconoclast Reverted Crown grant of the Boomerang Group. Most of this early work, however, was conducted on the Boomerang and W.S. claim. The W.S. Reverted Crown grant (Lot 2281) was Crown granted to E. Galloway in 1907. An 18-metre shaft was sunk on the W.S. Reverted Crown grant in 1914. The first recorded production occurred in 1939 with 30 tonnes of ore mined from this shaft (BC METAL MM00945). This shipment yielded an average grade of 240 grams per tonne gold and 1886 grams per tonne silver (Minister of Mines Annual Report 1939, page 76). Pinecrest Gold Mines Ltd. attempted to develop the property in 1946. In 1962, S. Ruzicka operated the Paddy in this area and shipped 24 tonnes yielding 187 grams of gold, 1462 grams of silver, 24 kilograms of lead and 24 kilograms of zinc.
Since 1974, property work has consisted of geochemical and geophysical surveys, prospecting, sampling the old dumps and workings and surface diamond drilling. Development of this occurrence encompasses a number of trenches and pits along the trend of the quartz veins. One shaft was sunk 18 metres vertically into the vein on the west side of the Boomerang property.
In 1980, Zeron Resources Ltd. acquired the Boomerang property and completed a program of bulldozer trenching. In 1986, J. Visser acquired the property and completed ground magnetometer and self-potential geophysical surveys. In 1986 and 1987, Logan Mines Ltd. completed seven drill holes and limited bulldozer trenching.
During 2014 through 2016, Carrara Exploration Corp. completed programs of geological mapping, geochemical (rock and soil) sampling and a ground magnetometer survey on the area as the Boomerang property.
