Deposit/Occurrence Name: Master-Destorata
Deposit Status: Occurrence
City/Town: Iron Bridge
Primary Commodity: Copper
Secondary Commodity: Gold, Silver,
Deposit Host: Quartz-Chalcopyrite veining
Ore Grades: 0.22% - 2.32% Cu, 0.03 Oz. Au, 1.05 oz. Ag
Economical Status: Standard Economical (Opened for potential)
Ore Reserves: 50,000 tons @ 2.50/3% Cu, 135,150 tons@ 2.32% Cu, 75,000 tons @ 1.00% Cu, East Zone 27,243 tons @ 1.487% Cu, 67,144 tons @ 0.88% Cu (West Zone), Center Zone 37,125 tons @ 2.62 and 31,275 tons @ 2.72% Cu.
Number of zones: 2 Zones that are separated
Access to the claims can be reached by taking highway 545 from Iron Bridge, Ont, Canada, which is 70 miles east of Sault Ste Marie and 116 miles west of Sudbury, Ont, Canada. Highway 546 is rather secondary highway and is easily access northerly at mileage 16. Its at Mileage 16, where there is a winding bush road running for about 2 miles into the property.
History and Exploration
The Master-Destorada Copper Prospect was being examined during the exploration season of 1930, by the Consolidated Mining and Smelting Company of Canada, Ltd. Its not known what type of work was carried out on this prospect by the company at the time. By the end of 1930, it was reported that the Consolidated Mining and Smelting Company had ceased early exploration operations. Most of this work was being carried out south of the north boundary of Montgomery Township. It was also S. C Rogers who had brought upon the Consolidated Mining and Smelting Company of Canada to conduct exploration work as the property as similar characteristics to the Gowganda silver-cobalt prospects/mines.
During 1941, Mr. S. C. Roger had revisited the property once again and continued to examine the D.C. Gagne find and at the same time noted other interesting showings and structure which had work done upon it. Only a minor amount of work was completed at this time, but several outcrops of well mineralized quartz-chalcopyrite veins were exposed. The main north vein system at this time was additionally traced at several intervals for 18,000 feet that were opened at both ends, and were up to 20 feet wide in places. During this time period it was the South Vein that was parallel and 500 feet from the north vein, which was traced 2,500 feet and had widths of up to 20 feet. Assays which were taken upon this vein had yield anywhere between 1 to 5% Cu, across widths of 4 to 14 feet. These general zones are considered to cover most of the claims in this particular group that are now opened up in claims SSM22812 and SSM22815. These sections are generally exposed through trenches and pit that show mineralized zones from twenty to forty feet wide over a strike length of 500-feet. It was also in this section that a zone of high-grade chalcopyrite, having a minimum width of eight feet, which is claimed to lie within this mineralized zone. Samples which have been taken upon this zone had given results of 0.03 oz. Au, 1.05 oz. Ag, and 8.56% Cu. Surface channel samples that were taken from this area had also been sent to Mr. Fraser of Falconbridge that resulted in 2.50% Cu and 3.00% Cu, over an average width of eight to ten feet.
In 1952, the property was later taken up for exploration work that was completed by Destorada Mines, Ltd. Work at this time resulted in geologically examining the copper occurrences that were yet to be explored at this time. In addition to this, diamond drilling was carried out to evaluate the potential of this copper discovery and in hopes of finding cobalt. DIamond drill Hole No. 3 had intersected 1.30% Cu from 123.0 to 123.3 feet, this also included 0,54% Cu from 125.0 to 125.5 feet, 0.31% Cu from 127.5 feet to 129.0 feet, and 0.26% Cu from 130.6 to 134.8 feet. Hole No, 4 returned intercepts of 0.35% Cu from 105 to 110 feet, and 0.35% Cu from 110 to 115 feet. This also included an intercept of 0.40% Cu from 115 to 120 feet and 0.15% Cu from 120 to 125 feet. Further intercepts had also included 0.38% Cu from 125 to 134.7 feet, including 0.15% Cu from 134.7 to 142 feet, and 0.22% Cu from 160 to 166.4 feet. Hole No. 5 had returned 0.17% Cu from 116.0 to 119.5 feet, including 0.08% Cu from 125.0 to 129.0 feet, and 0.07% Cu from 130.0 to 131.0 feet. Drill Hole No. 5 would also include an intercept of 0.74% Cu from 133.0 to 137.2 feet, and 0.68% Cu from 138.0 to 138.8 feet. Drill Hole No. 6 would additionally return 0.22% Cu from 62.0 to 63.5 feet, and 0.32% Cu from 64.0 to 68.3 feet. This would also include an intercept of 0.41% Cu from 69.0 to 69.6 feet, and 0.39% Cu from 71.2 to 73.2 feet. Rather lower grade-copper values were obtained through this diamond drilling program with some higher-grade values intercepted.
Additional drilling had been done in 1961, which results in similar values in Cu that were sampled by O. Manzutti on the Master Metal Zone. The new zone was generally discovered by the company in which diamond drilling was taken out by Master Metals Corp. It was during this time period when a total of four surface diamond drill holes were completed, that amounted to 669 feet in total length. This had included the calculation of 135,150 tonnes of ore at a grade of 2/32% Cu from the Master Metal Zone. Stakes on this property would shortly after become drop by the company as progress was being made towards other exploration areas that were ongoing by the company.
It was in 1962, when Virginia Mining Corp had taken an option on the Master Copper Prospects owned by Master Metals Corp. These claims at this time were additionally being held out by the company's claim holders O. Manzutti, who had work for Master Metals. This resulted in completing an additional 3 surface diamond drill holes that would total 621.5 feet that was done on this copper prospect. By the end of 1962 and into 1963, the company had also abandoned explorations at this property due to the lack of interest in this property.
Another staking on the property was made in 1964, when the property was taken up for explorations by the Consolidated Sannorm Mines, Ltd. Exploration work at this time would result in completing 10 surface diamond drill holes that would amount to a total of 3,546. This had rather intercepted with erratic Cu values that are located in this general area to warrant further work on the property. Drilling that was done by Consolidated Sannorm Mines, Ltd. was additionally done on the main zone and along strike to the east. Master Metal Corporation reported that the geology porportion of the property was underlain by huronian quartzite, slate, and boulders of the Gowganda Series. These flat lying sediments are rather intruded by gabbro and diabase sills to the south and west of the Master Metal Claims. At this time it was rather reported that the property would consist of three copper-bearing zones. The East Zone indicated ore reserves of 27.243 tonnes grading 1.487% Cu over a true width of 7 feet. This would also included indicated resources of 67,144 tonnes of ore grading 0.88% Cu over a true width of 14.90 feet in the West Zone. The Center Zone indicated 37,125 tonnes of ore grading 2.62% Cu over a true width of 6.12 feet, and 31,275 tonnes of ore grading 2.72% Cu over a width of 5.21 feet. No additional work was carried out by the company prior to dropping its interest in this property due to not enough tonnage indicated by previous drilling and financial problems were another fact.
During 1971, Master Metals Corp had hired on a drilling and exploration team for its Master Metal Property. Lines at this time were rather being cut at right angles from an east-west baseline, which cut through previous work. The north-south line at this time was extended to the northerly and southerly limits of the property. It was in addition to this work that made mapping, geophysical, and property examination more possible.
The Geophysical survey that was done on the property was originally intended that an IP Survey would be used over a limited part of the Master-Metal Property in Montgomery Township. Decision between the company and its directors would additional by made on March, 7, 1971, when it was decided to rent a V.H.F. - E.M Unit from Geomics Ltd. Lines by this time were being traverse and reading were being taken at 100-foot intervals.
Diamond drilling that was being conducted on this property was aimed at confirming the location of more mineable ore in the area worked by previous operators. A total of two holes were rather set out between the Center and Western Zones. During Diamond Drill Hole 1, the case had been broken and this hole was lost at about 45 feet. On Diamond Drill Hole 1-A the casing was broken that cause the hole to be lost at 32 feet. It was later anticipated to carry out Diamond Drill Hole No. 3 and had been done approximately 300 west of the previous holes. This was mainly being done in order to check the previously ore reported within the Westerly Zone of the Master Metal Property. The drill during this time had presently went through overburden in a 10-foot casing and into the bedrock for 82 feet. Drilling on the property by the company was ceased on June, 28, 1971, due to the lack of water and two holes had been started. The casing which was fairly costly for the company had also broken in each hole drilled which were abandoned at 45 feet and 32 feet.
Master Metal Corporation would additionally continue explorations in the area as diamond drill program was set for the Master Metal Zone. Most of this at the time was aimed at confirming the Southern Breccia Zone. The Werner Lake Holes were found and Holes W-1 and W2 were on the main westerly extension of th Master Metal Zone that was located in proximity to the other zones mentioned. Hole WL-3 to 7 had been collared on Zone Z1, which was 300 feet south of the west end of Main Zone. Prospecting work during this time period would additionally locate a new showing known as the Z-4 and an unreported quartz vein zone Z-2. At the Z-2 location the mineralized quartz zone had also been located which is believe to have been the westerly extension of Zone Z-2 At this time, there was additionally a total of 27 samples that were taken from the cores that range between 0.07 to 1.30% Cu Sampling from Hole No. 3 from 120.0 to 125.0 feet had in a grade of 0.81% Cu over 4 feet, and 120.0 to 127.5 feet had indicated a grade of 0.67% Cu over 6.5 feet. Drill Hole No. 4 indicated a grade of 0.32% Cu from 105.0 to 134.7 feet over 29.7 feet, and from 142.0 to 150.0 feet had average 0.34% Cu over 8.0 feet. At this time, it was also reported that no ore-grade-width samples were sample, but the values were felt to have been quite encouraging. Expectations at this time were also made towards the possibility of more massive sulphides that may have been grounded. Some of the holes within the foot-wall zone had also seen to be brecciated graywacke with stockwork quartz veins.that are generally mineralized with some chalcopyrite and chalcocite Various other drill holes of much lower grade copper were also reported that had not exceeded over 1.00% Cu from depth not exceeding 200 feet on the Werner Lake Zone of the Master-Metal Property.
Copper bearing veins rather occur along the NW Striking fracture zone which have been traced intermittently over a length of 5 miles. Additionally, two parallel veins are traced intermittently over a length of 12,600 feet. Both of these veins are also commonly up to 20 feet in width and are between 500 to 600 feet apart from each other. The main prospect is situated at the east end of the known occurrences, on a north vein system in which two shoots have a combined length 960 feet, averaging 2.65% Cu across 5.6 feet. It was at the 730-foot interval between the shoots that had been explored by 2 diamond drill holes with low Cu values. Drilling that was done had indicated ore reserves at 50,000 tons grading between 2.50% Cu, and 3% Cu. In addition to this, two zones had also been outlined by drilling that estimated it to contain 135,150 tonnes of ore grading 2.32% Cu across 7.0 feet in a length of 1,068 feet and 75,000 tons grading 1.0% Cu across 20 feet in length of 300 feet. Its also the occurrence that may be traced by drilling over a total length of 1,400 feet with the best interception being 1.56% Cu over 10.0 feet.
Geology within this portion of Ontario's large rock mass of the Canadian Shield is quite similar to the Gowganda Series. This generally consists of coarse granite pebbled conglomerate, pink, and some grey quartzite and slates cut by sills of diabase and large intrusions of coarse gabbro. There is rather a large size mass og Gabbro, having a length of six miles and with a maximum width of one mile, which lies roughly parallel and three quarters of a mile in a direction of S 75 degrees E. Its also the general dip of the vein system that appears to be vertical and any deviation from that dip only occurs at local bulges along strike. In addition to this, there are also several cross-faults which are associated with the distributions of resources in this general area. Most of the mineralization is associated with quartz which largely includes chalcopyrite that had a strike of N 75 degrees W and dips 60 degrees S to 90 degrees. Structural conditions and geology are consider to appear ideal for the deposition of Sulphides, more particularly chalcopyrite. It was also believed that finding an ore-body of major proportions had exist due to the erratic Cu values in zones.
There is also an extensive system of quartz veins striking east and west across Montgomery Township. It was generally observed that these quartz veins had contained Cu-bearing sulphide mineralization. Work which was carried out before 1971, had rather exposed a series of quartz-copper bearing veins through trenching and stripping. Diamond drilling that was carried out on this property had also indicated that the cu-baring quartz extends for a distance of 2,100 feet.
The region is generally underlain by much broadly folded. westwardly, plunging Huronian Sediments that are lying over early Precambrian Felsic igneous rocks. These sediments are rather intruded by late Precambrain Mafic sills and dykes. Its also within certain area within this general area that faults and shear zones had been injected with copper-bearing quartz-carbonated veins.