Bobjo Mine

Location

The Bobjo Mine Project is located in Earngey and Agnew Townships in the Red Lake Mining Division of Ontario. It is situated approximately 80 kilometres by road east-north-east of the Town of Ear Falls, Ontario.

Number of Claims & Hectares

9 patented claims for approximately 133 hectares and 31 unpatented claims for 315 unpatented claim units for approximately 5,232 hectares for a combined total of 5,365 hectares.

Exploration Target

Gold.

Date of Acquisition via Option Agreement

July 21st, 2006.

Ownership Interests

100% Mainstream Minerals Corporation

Operator

Mainstream Minerals Corporation.

Qualified Person as per National Instrument 43-101 (subject to change)

Garry Clark P.Geo.

Drilling Results Table

Results Table

Bobjo Mine Maps

Bobjo 2007 Mag

PDF file [ 5.4 mb ]

Picture Gallery

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Information

At the present time, the Bobjo Mine Project land package consists of 9 patented claims for approximately 133 hectares and 31 unpatented claims for 315 unpatented claim units for approximately 5,232 hectares for a combined total of 5,365 hectares. The 324 claim units were assembled by way of an initial Option Agreement dated July 21st, 2006 (9 patented claim units for 133 hectares, staking during the Fall of 2006 (54 unpatented claim units for 874 hectares), and the acquisition by way of staking of another 261 claim units totalling 4,358 hectares in October 2007 to the north and south of, and immediately adjacent to, the existing land package. A second Option Agreement dated December 17th, 2006 (32 unpatented claim units for 518 hectares for an area known as Bobjo West was subsequently dropped in late fiscal 2008 due to costs associated with maintaining it and for being non-essential to the overall project.

History of the Bobjo Mine Property

The following is a summary of the work history of the Bobjo Mine Property. The information was taken from the assessment file records for the area from the resident geologist’s office in Red Lake and Sudbury, Ontario and from the open file reports for the area. Over the past eighty-one years, only a limited amount of exploration and development work has been carried out over the claims and more precisely over the main mining claim KRL 6631 where the shaft and open cut exists. A number of exploration companies have carried out various exploration programs in the area adjacent to this ground since the more recent discovery of the Uchi Lake and South Bay Mines but due to the unavailable nature of the subject claims, no new work has been reported on the main patented group since the last Ontario Geological Reports from 1920 to 1930. A number of recent mapping and compilation programs done in the area by the Ontario Geological Survey and the Geological Survey of Canada have determined a significant east-west and northeast trending fault projections cutting through the area. This may have significant impact on the emplacement of the gold mineralization within the silicified host rock in the metavolcanic package surrounding major igneous plutons within the Red Lake Mining District, Ontario. A complete review of the available Assessment File data at the regional Red Lake Office determined that there is no historical data covering this property prior to the O.D.M. ‘Annual Reports’ for the periods dating from 1927 through 1935.

The first work covering the Bobjo Mine Property was in 1927 when a group of 15 mining claims was staked and referred to as the ‘Laidley Claims’. These included claims KRL 6630 to 6638 and KRL 4544 to 4546. The Bobjo Mine Property was immediately optioned to Coniagas Mines Ltd., who carried out an unknown amount of surface work including stripping, trenching and sampling. In 1928-29, Bobjo Mines Ltd. was formed to develop the Bobjo Mine Property. A shaft was sunk to a depth of 270 feet and two levels with over 1,600 feet of lateral development carried out. The main ‘open cut’ was started to exploit the high grade gold occurrence exposed on surface. A small stamp mill and amalgam plant was erected which produced 261.7 ounces of gold and 29 ounces of silver from an unknown tonnage. During the period from 1938 to 1939, Bobjo Mines Ltd. conducted further surface trenching, pitting, stripping and over 7000 feet of diamond drilling under the direction of T.C. Fawcett. All work was discontinued in April, 1939 due to the war effort.

In 1971, ownership of the Bobjo Mine Property reverted to R.J. Jowsey Mining Co. Ltd. of Toronto, Ontario and the claims remained in the company with little or no reported work being carried out over them due to their patent status. In 1974, ownership of the Bobjo Mine Property reverted to New York Oils Ltd. and consisted of the original nine patented claims KRL 4544, 4546, 6630 to 6633, 6638, 6889 and 6890. There is no record of any new work having been carried out during this period even though the South Bay and Uchi Mines in the Red Lake Mining District, Ontario were actively exploring and developing their ground in the vicinity. Over the period from 1928 to 1989, a number of Ontario Government Geologists had looked at the Bobjo Mine Property and taken samples. Of note, was E.L. Bruce’s map and comments which were included in the Ontario Department of Mines Annual Reports in 1929, J.D. Bateman in 1940, Fyon and Lane’s map in 1986 (P.2989), P.C. Thurston’s mapping in 1973 (M.P.56), 1980 (O.G.S. Map 2428) and 1985 (Map G.R. 234 + 236). The latest review and re-interpretation of the Red Lake-Uchi Lake Greenstone Belt was completed by M. Sanborn-Barrie in the GSC Publication Paper 98-01C.

Regional Geological Setting

The geology of the region has been mapped by various exploration companies doing work on a number of gold and base metal showings in the area as well as the different government agencies including the Geological Survey of Canada and the Ontario Geological Association. The geology is complex on a regional scale but locally over the property appears to be underlain by a series of sedimentary and metavolcanic sequences as part of the Uchi-Red Lake Greenstone Belt. Much of the information on this property has been derived from the original road making and stripping work, shaft and underground development work carried out by the Coniagas Mines Ltd. and Bobjo Mines Ltd. groups from 1927 to 1929.

The Red Lake District, including this property, is underlain by Archean aged rocks of the Superior Province. This property lies within the Uchi Sub-Province of northwestern Ontario. These rocks have been subdivided into assemblages with ages ranging from the youngest, the Confederation Assemblage of 2,730-2,800 million years, through the Bruce Channel and Woman Assemblages, from 2,800-2,900 million years, to the Balmer and Ball Assemblages, from 2,900-3,000 million years. The Balmer Assemblage forms the core of the Red Lake Greenstone Belt and hosts the areas largest and most prolific gold mining operations such as Placer Dome’s Campbell Mine and Gold Corp’s Red Lake Mine. The Balmer consists of basaltic tholeiitic and komatiitic flows intercalated with magnetite-rich and quartz-rich, cherty iron formations. Felsic pyroclastic rocks occur intercalated with these main units as thinly bedded substrates. Small mafic to ultra-mafic intrusives cut all the assemblages and units. The main portion of the Ball Assemblage is composed of calc-alkaline mafic flows and intermediate to felsic calc-alkaline flows and tuffs. The Bruce Channel Assemblage is poorly exposed in the eastern part of the belt but is composed of basaltic flows capped by minor felsic pyroclastic rocks dating around 2,894 Ma and clastic and iron formation meta-sediments. The Woman Assemblage units are restricted to 2,830 Ma in age and are composed of felsic rocks as seen on Mackenzie Island, where they are exposed on surface. The Confederation Assemblage is found on the northern and southern flanks of the Red Lake Belt which is comprised of calc-alkalic rocks with thick sequences of felsic pyroclastic deposits similar to those seen in the Birch Lake-Uchi Greenstone Belt. The later emplacement of large plutons and explosive felsic events from 2,731 Ma to 2,700 Ma heralded the Kenoran Orogeny. These events thermally weakened the crust and induced the localization of compression-related poly-phase deformation and regional greenschist facies metamorphism within an overall compressional regime. The property itself is located on the eastern limb of the Uchi-Red Lake Greenstone Belt within the Confederation Assemblage of volcanic rocks.

Thurston had identified three Cycles of volcanism as described in his G.R. Report 236, “Physical Volcanology and Stratigraphy of the Confederation Lake Area – Patricia Portion” 1985. Each cycle consists of a mafic base which grades upward into a felsic top. Interlayered within the felsic episodes are marginal, underwater hosted marbles, cherts and iron formations which cap each of Cycles I and II. Intermediate and felsic tuffs make up the middle to top layers of each cycle. The area appears to be affected by at least three phases of regional deformation resulting in the widespread development of folds, axial planar fabrics and ductile shear zones. The D-1 deformation involved N.W.-S.E. shortening, the development of N.E. to N-striking folds and faults. This event is most prevalent in the southern part of the belt in the Confederation Lakes area. The D-2 deformation involves N.E-S.W. to N-S shortening and the development of east-west to west-northwest trending regional faults, folding and fabric orientations. This event is most recognizable in the Uchi Lake area, but tends are locally distorted by the late D-2 emplacement of the plutons. The D-3 deformation in the area is recognized by the late, north-south trending brittle faulting.

Description of Claims and Access to the Bobjo Mine Property

The Bobjo Mine property is located along the southeast limb of the Red Lake-Uchi Lake Greenstone Belt area in the Red Lake Mining District of Ontario. The property is located approximately 28 kilometers east of the Town of Red Lake, Ontario and approximately 80 kilometers by road east-north-east of the Town of Ear Falls, Ontario. The Bobjo Mine site is accessible by gravel timber haul-roads and local trails in the summer months. The former South Bay Mine road connects the Town of Ear Falls to several tourist camps on the Woman, Confederation and Uchi Lakes situated within 10 to 20 kilometres of the Bobjo Mine Property and is presently used by outdoors sports fishermen, hunters, timber companies and exploration personnel and is a “Use at Own Risk” access road. This road is normally ploughed during the winter months due to the timber activity in the area all year round. Access to the Bobjo Mine Property can be obtained via a poorly maintained tote road north from this timber haul road for approximately three thousand metres. The Bobjo Mine is sandwiched between the South Bay Mine which produced approximately 1.6 million tons of 10% zinc and 15% copper and the Uchi Mine which has produced approximately 114,000 ounces of gold. The Jackson-Manion Mine which produced 27, 142 ounces is also located northwest of the property.

Originally acquired via two Option Agreements in July 2006 and December 2006 respectively, and some staking in December 2006, the Bobjo Mine property was comprised of a total of 9 patented claims and 86 unpatented mining claim units for approximately 3,800 acres as at December 31st, 2006. The number of claim units was subsequently increased by way of staking another 164 claim units (6,560 acres) in the Fall of 2007 for a new total of 9 patented claim units and 250 unpatented claim units (10,360 acres). This land package was subsequently decreased to 9 patented claim units and 218 unpatented claim units on December 10th, 2008 when the second Option Agreement for the area known as “Bobjo West” (32 claim units for 1,280 acres) was dropped on December 10th, 2008 due to costs associated with maintaining it and for being non-essential to the overall project. The numbers of the patented claims are: KRL 17329 (1 unit), KRL 4544 (1 unit), KRL 6630 (1 unit), KRL 6631 (1 unit), KRL 6632 (1 unit), KRL 6633 (1 unit), KRL 6638 (1 unit), KRL 6689 (1 unit) and KRL 6690 (1 unit).

Highlights from the 32 holes drilled to date at the high-grade gold discovery area included:

53.61 g/t Au over 2.45 metres 12.01 g/t Au over 0.50 metres
32.95 g/t Au over 1.10 metres 9.45 g/t Au over 1.00 metres
27.43 g/t Au over 1.00 metres 8.70 g/t Au over 1.10 metres
19.61 g/t Au over 2.00 metres 8.45 g/t Au over 3.40 metres
18.18 g/t Au over 0.50 metres 6.84 g/t Au over 1.00 metres
14.55 g/t Au over 1.00 metres 6.25 g/t Au over 1.50 metres
12.80 g/t Au over 0.50 metres 5.77 g/t Au over 3.00 metres

A further 10 exploratory holes were drilled in 2008 2 kilometres south of the main discovery area at the bottom end of the property. All ten holes intersected wide zones of anomalous Platinum values. This area will need to be investigated further in the future. Andrew Gracie, Ph.D., P. Eng., P.Geo. was at the time the Qualified Person under National Instrument 43-101. All of the samples taken during the Phase I and Phase II drilling programs were analyzed by Acurassay Labs using the Neutron Activation Method and Acqua Regia Digestion with an ICPAES finish and standard fire assay for gold. True widths are not known.

Going Forward at the Bobjo Mine Project

The Company is pleased with the progress made to date at this project and with the fact that the drilling programs in 2007 and 2008 had so far intersected gold in twenty seven out of thirty two holes from surface to a depth of 312 metres so far, which included high-grade gold in many intersections. All zones are open at depth and in all directions. Some rare earth elements, rare metals, and other minerals were a surprise on this gold project and may, after careful analysis, need some follow up drilling in the future to determine if these initial findings are economically viable. Most of the gold-bearing veins tested so far ran in an east-west direction. The area just north of the high-grade gold discovery is also host to many other quartz veins that have not been tested as of yet, including a quartz vein of up to 2 metres wide that is running in a north-south direction. Grab samples from this vein yielded results as high as 115.00 g/t Au.

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