Skunk Lake Iron-Sulfide Prospect - Ore Reserves of 2,000,000 Tonnes of Fe, grading 63% with minor amounts of sulfides.
The Dominion Gulf Company had held a group of 92 unpatented claims in central Afton Township, Nipissing District, Ontario, Canada. Claim staking had occurred after an airborne magnetic survey had revealed a large east-west trending magnetic anomaly. Other examinations of the area had revealed that it was tempered as being caused by a fold Early Precambrian Iron Formation estimated to be 90 m, and 300 feet below the surface. After conducting the Airborne Magnetic Survey, it was follow by a staking, a ground magnetic survey, a detailed geological survey along the claim boundaries, and some diamond drilling. Diamond drilling on the property consisted of 5 surface holes, totalling 3,525 feet became drilled in the spring of 1948. Hole Numbers 3, 4, and 5 had totalled a length of 964 feet, which were driven on claim S50388 to investigate a quartz vein, and holes No. 1 and 2 had totalled 2,561 feet in length, became drilled on claim S50327. Further statements from the company had reported that no results of economic interest are reported for hole numbers 3,4, and 5, and no iron formations was reached in drill holes 1, and 2.
1953 - Other claims were staked by Geo-Scientific Prospectors, Limited in Afton Township.
More prospecting on the Skunk Lake area was considered to have all started in 1952, when the Geo-Scientific Prospectors Limited staked this property. Company officials at the tie had held a group of eight unpatented mining claims in Scholes Township. It further state that these claims were situated to the east of the Afton-Scholes Township Boundary lines. Further company statements had stated that surveys were being conducted on selected areas of Afton Township. Surveying in those selected areas had resulted in a mineralization by geophysical surveys. Exploration of the area resulted in heavy trenching, and diamond drilling holes.
1958 - Exploration work continued to take place by the Geo-Scientific Prospectors, Limited. in Afton Township.
More statements from the company stated that five trenches were made, and four surface diamond drill holes, totalling 141 feet in length became completed. Geological maping procedures were also done on this property within this time period of conducting explorations.
1959 - Geo-Scientific Prospectors, Limited - Continued work in Afton Township
Diamond drilling consisted of three more surfaces holes, totalling 1,136 feet in length. Much of the mineralized zones were reported to have been in andecite, which had showed chlorization, epidotization, and slight berrciation. Mineralizations within this area were considered sparse, and occurred as tiny sulfides veinlets, and disseminated pyrite, chalcopyrite, and pyrrhotite.
1956-1957 - Other Claims staked by North American Rare Metals, Limited.
Other stakes on Sunk Lake had taken place in 1955, as the North American Rare Metals, Limited would conduct their own explorations procedures. Almost all explorations on this property by the company had included ground geophysics, and mapping The Skunk Lake Exploration was also being contracted at the time to another surveying company known as Sharpe Geophysical Surveys, Limited. During this time period a magnetometer survey had became establish on a portion of the property, which was held by North American Rare Metals, Limited. Other statements had stated that this survey was being conducted on picket lines space 400 feet. Company officials stated that the survey contained no iron formation, but lies south-east of an Iron Formation Statements from geological experts suggest that the area may be covered by a pyrrhotite mineralization within six locations of the surveyed area. Survey settings within this prospective area indicated these predictions from characterized aligment, along the strike, of Magnetic highs, and lows, which are typically pyrrhotite mineralizations in Keewatin Volcanics. Results from the survey determined the presence of 6 anomalies that were discovered from magnetometer survey methods.
Anomaly A: Two Lines, minus 2,300 to plus 500 gamma with the positive zone considered to extend to another four lines to the east.
Anomaly B - Three lines, minus 1,500 to plus 400 gama, and a 300 gamma.high is stated to parallel with the anomly on north-east flank. Other statements stated that the lows in this area are known to extend northeast for one mile, and may be a formational low.
Anomaly C-1- Three lines, plus 1,350 gamma, which are similar to the other highs but appear alone in the area.
Anomaly C-2- Two lines, minus 1,250 gamma, which are similar to several other lows that occur in this area.
Anomaly D - Seven lines, from minus 7,000 to plus 300 gamma, may possibly in line with drill tests on adjoining property to the southwest.
Anomaly E - two lines, minus 400 to plus 1,700 gammas, is stated to dip southwest
Anomaly F - Two parallel structures, two lines each, plus 1,200 to minus 400 gammas are stated to dip southeast.
1956 to 19 - Property taken over by Temagami Mining Co, Limited,
A contract was reported to have been made when the Geophysical Engineering, and Surveys, Limited became in charge of exploring this area. Diamond drilling at the time had consisted of three surface diamond drill holes, totalling 1,166 feet.
1957 - Staked by Temagami Mining Co, Limited - Explorations contracted to Geophysical Engineering, and Survey, Limited.
Another 9 surface holes, totalling5,380 feet became completed by the Geophysical Engineering, and Surveys, Limited. A detailed description of the drill results are found below.
Huronian Sediments - The Huronian Sediments are considered comprised of pebble greywacke or conglomerate, and are occasionally in bands of fine grained argillaceous greywacke. Other statements state that this formation is massive in size, and has a fresh appearance to it. It was also indicated that the pebble greywacke contains up to 20% small pebbles, and a few boulders. Further examinations had stated that the bedding in these planes, which are associated with the fine grained greywacke, are known to indicate that the strata is nearly flat.
Archean Intrusives - These segiments are considered to be underlain by a fine to medium grained gabbroic intrusives. Much of the Gabbro is also considered to be coarser grained, which appears to be similar to the diabase. Other inspections of the gabbro had indicated that it was lighter in color, and more highly altered. Even the diabase contact within this area is overlain by sediments are sharply defined, without change in grain size. Geological examinations of the are had revealed that the gabbro was pre-Huronian in age, and the contacts with the volcanic are indistinct. Some more examinations had stated that the Rhyolite appears to have been brecciated, fused, and partially assimilated by the Gabbro. Diamond drilling had also indicated the presence of numerous altered rhyolite xenoliths of varying size.
Archean Volcanics - Volcanics at the time were also encounter from diamond drilling, which comprise of fine grained, medium grey rhyolite breccia. Other statements state that the fragments of the breccia are also considered to be slightly darker then the matrix The volcanic formation in this area has a dip from 65 degrees to 70 degrees. Some more statements stated that the strike of the volcanics is not known, but the magnetic anomalies over the iron formation at 3 miles to the north are known to shown that the regional trend is southwesterly.
Carbonates - Two diamond drill holes in 1956, and four holes in 1957, had encountered carbonate bodies. Examinations defined the carbonated bodies as medium, grained, crystalined, with grey to dark blueish grey, which is defined in other places as fined grained harder, light grey and vuggy. Predictions also state that the carbonate in the Skunk Lake area can also come in massive veins with a dip that is fairly steep. Indications of the steep dip had mainly been taken from the occasional dark, chloritic seem of unreplaced rock.
Magnetite - Temagami Mining, Company had additionally made the discovery of Magnetite formations to a depth of 350 feet below Huronian Sediments. Much of the magnetite formation is made up of several narrow bands of unreplaced rock, and introduced impurities indicate that the bodies dip at 65 degree to 70 dregees. Examinations of this area had revealed that the magnetite bodies are considered to be roughly lenticular, with jagger outlines, and long axis trending in an easterly direction. Some of the impurities that are associated with the magnetite are known to include carbonate, amphibolite, garnets, and minor amounts of pyrite, chalcopyrite, pyrrhotite, and apatite. Drilling and magnetometer data soon had resulted that this ore-body has 2,000 tonnes of ore reserves indicated so far.
Sulfides - All the sulfide zones within the Skunk Lake Iron formation are stated to be disseminated pyrite, chalcopyrite, and pyrrhotite, which occur within the magnetite bodies. It rather known to carry minor amounts of pyrite, and chalcopyrite strongly occurs in dissemination, of tiny irregular veinlets, and blebs, and quartz-carbonated veins within the highly altered zones surrounding the magnetite deposits. A small amount of chalcopyrite had also occurred within the sediments in hole No. SK-9.
1962 - Temagami Mining Company, Limited
A magnetometer survey was stated to have been conducted in order to uncover more magnetite ore-bodies.
1964 - Temagami Mining Company, Limited, were formed into the Copperfields Mining Company, Limited.
1965 -Copperfields Mining Company,Limited had also option 23 survey claims in Afton Township from Geo-Scientific Prospectors, Limited. No additional work was commenced on these claims, and they were transferred back to Geo-Scientific Prospectors, Limited.
1973 - Copperfields Mining Company, Limited -claims on Scholes, and Pyllis Township boundary of Skunk Lake.
Mine explorations on these claims were being conduct on December, 31, 1973. Company officials at the time had held a total of ten, leased, survey mining claims within these township boundary lines.