Name of Mine or Occurrence: Twin Lake Copper Prospect - Esten Property
Mine or Occurrence: Occurrence
Development/Exploration: Some trenching/diamond drilling
Nearest Town or City: Elliot Lake
Township: Esten Township
Primary Commodity: Copper
Secondary Commodity: Gold (Trace elements)
Grade 0.10 to 11% Cu, trace in gold
History and Exploration:
The Claims were additionally acquired by Buckles Uranium Mine in conjunction to copper showings and covering of a anomaly in 1953. But the prospect wasn't considered of importance at this time which resulted in letting the claims lapse as it wasn't of interest. At this time it was taken up for optioning and the claims would additionally be acquired to cover a magnetic survey anomaly in Esten and Buckles Townships. These claims were later allowed to lapse by the current claim holder at the time in which they were secured once again but would lapse in 1954.
During 1954, the Esten Copper Property was additionally being first explored by a prospector named H.E Martin. In addition to this, exploration work resulted in completing 26 surface diamond drill holes that had all returned interesting copper intercepts. Hole No. 1 had returned 0.67% Cu over 5.3 feet from depths of 146.0 to 151.3 feet, and 0.77% Cu over 2.0 feet from 151.3 to 153.3 feet depths. This also resulted in a return of 0.48% Cu over 1.8 feet from depths of 153.3 to 155.1 feet, and 0.85% Cu over 5.0 feet from depths of 155.1 to 160.1 feet. It would also result in 0.10% Cu from 160.1 to 162.1 feet over 2.0 feet, and 1.92% Cu over 3.4 feet from depths of 162.5 to 165.5 feet. Another intersection had returned 1.19% Cu over 4.3 feet from a depth of 165.5 to 169.8 feet. and 1.34% Cu over 2.5 feet from depths of 169.8 to 172.3 feet. By this time it would also include 0.37% Cu over 4.5 feet from depths of 172.3 to 176.8 feet, and 0.47% Cu over 5.0 feet from depths of 176.8 to 181.5 feet. One last assay resulted in 0.29% Cu over 1.8 feet from a depth of 181.5 to 183.3 feet
Drill Hole No. 2 had returned 0.45% Cu over 3.2 feet from depth of 69.0 to 72.2 feet, and 0.03% Cu over 4.3 feet from depth of 141.7 to 146.0 feet. This also included an intersection of 0.17% Cu over 2.5 feet from a depth of 146.0 to 149.9 feet, and 0.60% Cu from 149.9 to 151.9 feet over 2.4 feet. It would also included 0.08% Cu over 4.1 feet from a depth of 151.9 to 156.0 feet, and 0.10% Cu over 5.4 feet from a depth of 156.0 to 161.4 feet. Another intersection included 0.21% Cu over 0.8 feet from a depth of 166.7 to 173.5 feet, and 4.67% Cu over 2.5 feet from a depth of 161.0 to 163.5 feet. From 163.5 to 166.7 feet had returned 1.59% Cu over 3.2 feet and 0.21% Cu over 6.8 feet from a depth of 166.7 to 173.5 feet. The second last intersection resulted in returns of 2.64% Cu over 3.0 feet from a depth of 173.5 to 176.5 feet, and the last had intersected 2.23% Cu over 3.4 feet from a depth of 176.5 to 179.9 feet.
Drill Hole No. 3 had returned 0.84% Cu over 2.0 feet from a depth of 33.0 to 35.0 feet, and 0.17% Cu over 9.0 feet from a depth of 51.0 to 60.0 feet. One last assay resulted in 0.20% Cu over 2.0 feet from a depth of 153.0 to 157.0 feet.
Drill Hole No. 4 had returned 1.13% Cu over 2.9 feet from a depth of 118.0 to 120.9 feet, and 1.05% Cu over 2.0 feet from a depth of 263.5 to 265,5 feet. This would also result in 0.25% Cu over 3.0 feet from a depth of 265.5 to 268.5 feet, and 0.14% Cu over 5.0 feet from a depth of 268.5 to 273.5 feet. Another intersection would result in 0.29% Cu over 5.0 feet from a depth of 273.5 to 278.5 feet, and 0.13% Cu over 5.0 feet from a depth of 278.5 to 183.5 feet. It would also result in returns of 0.26% Cu over 5.0 feet from a depth of 283.5 to 288.5 feet, and 0.13% Cu over 5.0 feet from a depth of 288.5 to 293.5 feet, and 0.34% Cu over 4.5 feet from a depth of 310.5 to 314.5 feet, and 0.46% Cu over 5.0 feet from a depth of 314.5 to 319.5 feet.
Drill Hole No. 5 would intersect 2.15% Cu over 1.6 feet from a depth of 117.2 to 118.8 feet, and 0.41% Cu over 2.6 feet from a depth of 179.4 to 182.0 feet. This would also include an intersection of 10.16% Cu over 1.3 feet from a depth of 182.0 to 183.3 feet, and 1.36% Cu over 2.0 feet from a depth of 222.2 to 224.2 feet. It had also included returns of 0.35% Cu over 2.1 feet from a depth of 224.2 to 226.3 feet, and 0.56% Cu over 4.4 feet from a depth of 226.3 to 230.7 feet. Further returns resulted in 0.10% Cu over 3.9 feet from a depth of 230.7 to 234.6 feet, and 1.20% Cu over 3.2 feet from a depth of 234.6 to 237.8 feet. Results were also obtained from 237.8 to 241.7 feet that assayed 0.10% Cu over 3.9 feet, and 0.34% Cu over 5.6 feet from a depth of 241.7 to 247.3 feet. The fourth last intersection resulted in 1.10% Cu over 7.0 feet from a depth of 249.0 to 256.0 feet, and the third last assay returned 0.47% Cu over 9.0 feet from a depth of 256.0 to 265.0 feet, and the second last intersection resulted in 2.31% Cu over 5.0 feet from a depth of 265.0 to 270.0 feet with the last intersection assaying 2.20% Cu over 3.0 feet from a depth of 270.0 to 273.0 feet.
Prospecting along with exploration work was being conducted on the Twin Lake Copper Prospect in 1956, by Federal Kirkland Mining Company. In addition to this, the company had additionally conducted surface diamond drilling that amounted to 29 surface drill holes, totalling, 9,695 feet in length. Drill hole 1 at this time had intersected 4.3 feet at 1.10% Cu, and 2.5 feet at 1.34% Cu. This also resulted in drill hole 2 which intersected 2.5 feet at 4.67% Cu and 3.2 feet at 1.59% Cu, and 3.4 feet at 2.23% Cu, and 3,0 feet at 2.23% Cu. Drill Hole 4 at this time would additionally intersect 2.9 feet at 1.13% Cu, and 2.0 feet of 1.05% Cu. Drill Hole 7 would also intersect 2,7 feet of 1.70% Cu, while drill hole 8 had intersected 2.6 feet of 1.32% Cu, and 4.1 feet of 1.03% Cu. Drill hole 9 had intercepted 5.1 feet of 1.05% Cu, and 3.3 feet at 2.23% Cu. Drill Hole 11 had intercepted 1.9 feet of 1.15% Cu, while Drill Hole 20 had intersected 5.0 feet of 1.14% Cu, and 4.0 feet of 1.17% Cu. Drill Hole 21 had intercepted 1.4 feet of 2.68% Cu, The property at the time had consisted of 36 surveyed claims that were drilled between Match and August, 1956, by Federal Kirkland Mining Company, Ltd. All drill data to this were additionally summited for assessment credit in two groupings. The first grouping consisting 20 of these claims held in 1964 by Cadamet Mines, Ltd.
It was in 1963, when the area was presently flown in with an airborne magnetics by the geological survey of Canada, Ontario Department of Mines. This resulted in a strong trending anomaly that was identified within the area that warranted further exploration work on the property.
By the following year of 1964, the property was later place under exploration phases by the Cadamet Mines, Ltd. The property at this time had consisted of two survey claims and eighteen unsurveyed claims in the Christie Lake section of the southeast-central Esten Township. These claims were additionally staked in area that had shown magnetic anomalies trending west-northwest in the vicinity of Christie Lake and the area of the Twin Lakes Copper Showing lying to the northwest of Christie Lake. Cadamet Mines, Ltd., would additionally go on to becoming the successor company to Federal Kirkland Mining Company. Holes 1 to 24, were additionally located within the eastern grouping with the majority located on historical claim S91631, and holes 25, 27, and 28 were located in the western group.
It was in 1966, when Cadamet Mines had reorganized itself in order to incorporate Terrex Mining Company, Limited. The naming of the claim into Twin Lakes was generally adapted by the Cadamet Mines, Personnel that was used for Christie Lake.
During 1974, the claims were additionally taken up by Esten Exploration Inc. who had conducted its own explorations on the Twin Lake and Esten Showings. Diamond Drill Hole 74-1 had intersected 4.0 feet of 0.20% Cu and a trace of gold over 4.0 feet and from depths of 273.0 to 277.0 feet. This also included an intercept of 0.30% Cu and a trace of Au over 6.0 feet and from 277.0 to 283.0 feet. Hole 74- 7 had additionally intercepted 0.17% Cu over 5.0 feet and from 114.0 to 119.0 feet. It would also included an intersection of 0.46% Cu over 4.0 feet and from 119.0 to 123.0 feet in depth. Higher grade intercepts were additionally made from a depth of 123.0 to 125.5 feet that assay 2.64% over 2.5 feet. Drill Hole No. 74-7 would also include 0.22% Cu over 4.8 feet from depth of 144.2 to 149.0 feet. Another intersection was made from 149.0 to 156.0 feet that returned 0.21% Cu over 7.0 feet. Another intercept was made in the greenstone silicified area that returned 0.93% Cu over 2.0 feet from depths of 177.7 to 179.7 feet. Drill Hole No. 74-8 had returned 2.79% Cu over 3.8 feet and from depths of 59.7 to 63.5 feet. This also included returns of 1.06% Cu over 5.9 feet from depths of 80.8 to 101.7 feet. Another intersection was made from 101.7 to 109.6 feet that returned 1.12% Cu over 5.9 feet.
Chalcopyrite rather occurs in stringers and dessiminations in highly silicified schists and breccias within a strong northwest trending shear zone. Talc in addition to chloritic schists and diabase are present within a sheared zone and within adjacent rocks, which are predominantly granitic. Some of the better concentrates of Chalcopyrite were obtained within a few hundred feet of the intersection of the main sheared zone and a strong subparallel zone of shearing and silification.
A large number of good grades were intersected and obtained in the drilling over a length of 380 feet and to a depth of 400 feet. More intensive drilling of this area would have to be done in order to more accurately determine the grade and tonnage. However, an estimation on the probable ore was made in which a tonnage of 76.900 tons grading 1.73% Cu with an average width of 8.04 feet was outlined. Mineralized rocks are generally exposed on the outcrop, and several drill collars were identified in the area.
Rock of the country are rather siliceous averaging around five meters thick and exposed over a strike length of about 75 m. The unit is cut by chloritic shears and some associated quartz stringers. These shears are generally sub-parallel to the siliceous unit. Chalcopyrite is most strongly associated with chloritic shears but also occurs irregularly on its edges. The northern unit is quite parallel with the southern one, which is found over a total length of at least 550 meters and coverages on the unexposed projected eastward extension of the southern band, and get lost in overburden. This is rather a second band of similarity siliceous rock which lies 40 metres north of the showings, with granitic rock in between the mafic schist occurring irregularly.