The Big Island East and Bartley Group shown in magenta and part of the Green form the western portion of a large contiguous land package held by Copper Reef in the main Flin Flon Camp, The Group contain two main VMS horizons and mineralization. On the West side is the Big Island Deposit Horizon, thought to be a fold repetition of the Trout Lake Mine Horizon and the Cuprus- White Lake Mines Horizon on the east and north sides; north of the former Cuprus and White Lake Mine. The Bartley Lake Group was acquired through Foran Mining from Aur Resources in the same deal that the Big Island, Bib, Steeves Lake Group were acquired by Foran. The Big Island East Property was never owned by Granges or Aur Resources and was acquired from Foran who indirectly through M'Ore Exploration Services acquired it from Northgate Mining in 1997. In addition the property in its central area has potential for Cu, Pt Group mineralization related to feeder dikes of the large Mikanagan gabbro sill. The Property Group was flown with VTEM in the winter of 2010.
The geology of the property is dominated by primitive arc volcanic sequences intruded by mafic layered intrusions and their feeder dyke systems. Narrow exhalite horizons and sedimentary horizons occur within the sequence. The mafic sequence known as the Bear Lake Block contains extensive large areas of epidote alteration which makes it a highly prospective location for VMS deposit.
The White Lake horizon is poorly defined as very little outcrop is exposed of this horizon on the stratigraphically lower side of the Mikanagan sill. There as been very little drilling along this horizon on this property.
The geology of the Ni-Pt- Pd Potential is described further in this document.
Diamond drilling between 1987-1991 delineated a deposit ranging between 100,000- 150,000 tons at 10-15% zinc, 1-2% copper, 1-3 oz/ton Ag and 0.05-0.09 oz/ton Au. After the discovery of the Tara Lake Deposit, exploration work focused on diamond drilling along the Tara Lake exhalative horizon and three other exhalative horizons. Intensive mapping, prospecting, and trenching were also undertaken. This horizon has been extensively explored. The property could because of the grade of the Tara Lake deposit warrant deep exploration along the horizon.
Also some Spectrum and VTEM Airborne anomalies remain untested especially along the east side of the property towards Trout Lake.Cuprus - White Lake Mine Horizon
Very little work was done on the east side of the property which host the Cuprus - White Lake Mine Horizon. This horizon on this property is very under explored.Ni-Cu-PGE potential
The impressive results of a follow-up diamond drilling program by Fort Knox Gold Resources Ltd. on their McBratney Lake Palladium-Platinum Property east of Flin Flon, Manitoba has prompted Foran Mining Corporation to evaluate the potential of their Big Island Property for Ni-Cu-PGE deposits. The Big Island Property is located immediately adjacent the McBratney Lake Property. The BIG Zone Pd-Pt Occurrence on the McBratney Lake Property is located approximately 1.6 km south of the Big Island Property boundary.
Sampling and diamond drilling by Fort Knox indicates the presence of a series of mafic plugs, dykes, and sills east of Manistikiwan Lake and south of the Big Island Property that are PGE-bearing. Government and industry mapping suggests that this swarm of mafic intrusions continues north onto the Big Island Property.
The BIG Zone PGE Occurrence on the McBratney Lake Property is apparently located along a north-south striking and sheared contact between a mafic intrusion and andesitic volcanic flows. Mineralization consists of disseminations, blebs, and massive stringers of pyrite, pyrrhotite, chalcopyrite and violerite. A confirmation drill hole completed in January, 2001 by Fort Knox intersected an impressive 16.8 m of mineralization that assayed 8.9 g/t Pd, 1.8 g/t Pt, 1.1% Cu and 0.6% Ni.
Although there has been a significant exploration effort on the Big Island Property, this work has focused exclusively on the volcanic stratigraphy and the discovery of VMS and gold deposits. It is clearly evident that the Ni-Cu-PGE potential of the mafic intrusions on the property has not been considered in the past. The detailed exploration work completed by previous workers on the property is of tremendous benefit to the proposed Ni-Cu-PGE exploration program. The location of prospective mafic intrusions has been mapped in detail, and ground magnetic, VLF-EM, and pulse-EM surveys completed. This information allows for target selection for diamond drilling and to identify areas requiring additional prospecting and sampling.The McBratney Lake Pd-Pt Occurrence
In July, 2000, Fort Knox Gold Resources Inc. announced that it had optioned the McBratney Lake Pd-Pt Property from Hudson Bay Exploration and Development Company (HBED). The McBratney Lake Property is immediately adjacent to the southwest corner of the Big Island Property. In 1991, HBED discovered a high-grade zone of Pd-Pt mineralization that assayed up to 10.65 g/t combined Pt-Pd over 12.2 m. The zone, named the BIG Zone, was intersected a total of three holes. As HBED was not a publicly-owned company at the time, news of the discovery of this zone was not made available to the public. The discovery of Pd-Pt mineralization of this grade and thickness in the Flin Flon area was unprecedented, as the area has never been prospected for PGE-deposits.
From December, 2000 to February, 2001, Fort Knox undertook an exploration program consisting of an induced polarization survey which was followed by a six-hole diamond drill program. The first hole, a twin of the discovery hole, intersected 16.8 m that assayed 8.9 g/t Pd, 1.8 g/t Pt, 1.1% Cu and 0.6% Ni. Holes designed to intersect down dip and to the north along strike intersected impressive Pd-Pt over much narrower widths. Holes drilled 12.5 m and 25 m south along strike failed to intersect the mineralized contact zone. Very little is known about the style of PGE-mineralization associated with the BIG Zone on the McBratney Lake Property. The following summarizes the total knowledge of the author regarding the McBratney Lake Property based on publically available information and in discussions with Fort Knox personnel:
Copper Reef has flown both the Bartley Lake and East Big Island Properties as part of a larger survey.
Bartley Lake has two main areas of interest; One that is under Bartley Lake itself where the rock in this area host a number of airborne anomalies, many of which have already been tested. The anomalies are caused by massive sulphides and /or graphitic sediments lying above the Mikanagan layered gabbro sill; and the second is the extension of the Cuprus - White Lake Horizon lying at the base of the Mikanagan sill. The Cuprus-White Lake Horizon needs a more detailed look in this area.
Unlike the Big Isand East Property where most geological units strike north-south parallel to the dominant F2 fold axis, the stratigraphy here is oriented more north west where the dominant N-S trending fold structures are rotated about a north east trending F3 anticline towards the north west.
The property is underlain by NW trending gabbros of the Benn Lake Complex, basalt, and basaltic andesites of the Bear Lake Block and gabbro, gabbro-norite, ferro- tonalite and diorite of the Mikanagan Lake Sill. Aside from the Bartley Horizon which contain sediments and felsic volcanic rocks, the property has very similar rocks and similar economic prospects to Big Island East which is why they are grouped together. The Bartley Lake however does not contain the Tara Lake VMS Horizon.