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The large Goldbrook property is located in Nunavik, northern Quebec, Canada. The present logistical centre of the property, Belanger Camp with accommodation for 70 persons, is located approximately 95 km south of the Northern Village of Salluit, a regional community on the Arctic coast. The eastern end of the contiguous part of the elongate property is about 17 km west of Kangiqsujuaq, another Inuit community on the Arctic coast, and extends 200 km west, and is up to 50 km wide in a north-south direction. There are several smaller outlying claim blocks on the east end, west end and south side of the large contiguous block. The total area of the 8863 individual mineral claims held in the name of Goldbrook Ventures Inc is 360,720.89 hectares or approximately 891,329 acres. The 8863 individual mineral claims are in good standing.
The Goldbrook Raglan property has grown in size since 2003 when Goldbrook began acquiring Raglan property through option agreements and through direct acquisition of mineral titles from the Provincial government mineral tenure authority (northeast and northwest parts). The large property was not contiguous until as recently as 2007, and was comprised of blocks of tenure across the expanse of the mineralized Cape Smith (Raglan) belt. These property components have been named based on locality of the tenure blocks and include from east to west along the belt, the Wakeham property, Ungava property, the Masuparia property, the Nuvilik property, the Belanger property, and the most recently added Bravo property that connects the 3 western Nuvilik, Masuparia and Belanger properties. The current focus of work on the Belanger trend extends from the Novawest/Bravo main property westward for approximately 75 km.
The Raglan Project area is underlain by rocks of the Cape Smith (Raglan) Belt that extends for 375 km across the Ungava Peninsula of Nunavik, northern Quebec, Canada. The Aphebian (Paleoproteozoic) Cape Smith Belt and the Thompson Belt, both hosting Ni-Cu-PGE deposits, are part of the Canadian Circum-Superior Belt that separates the Archean Superior and Archean-Proterozoic Churchill geologic provinces of the Canadian Shield.
Komatiite-associated and komatiitic basalt hosted Ni-Cu-PGE deposits occur in Aphebian greenstone belts in various locations around the world including the Cape Smith Belt, Thompson Belt and the Pechenga Belt, Kola Peninsula, Russia. The Cape Smith Belt is a foreland thrust-fold belt that records rifting of the Archean Superior Province (ca. 2.04 to 1.89 Ga), accumulation of sedimentary units and placement of volcanic rocks and associated intrusions on a continental margin represented by the Povungnituk and Chukotat Groups, and then accretion with the Archean-Proterozoic Churchill geologic province to the north or according to alternate interpretation, collision with an accumulation of suspect terranes to the north. The accretion occurred during the Hudsonian Orogeny (ca. 1.83 Ga).
In the Goldbrook Raglan Project area, the Cape Smith Belt consists of two major Proterozoic units, the Povungnituk Group and the Chukotat Group, and according to others also includes the Spartan and Watts Groups. The Povungnituk Group consists of a lower sedimentary sequence, a middle volcanic sequence, and an upper sedimentary sequence. The lower sequence consists of conglomerate, sandstone, iron formation, semipelite and dolomite in the base and sandstone, semipelite, pelite, minor basalt and mafic volcaniclastic sedimentary rocks in the top. The middle sequence of the Povungnituk Group consists of basalt, rhyolite and mafic volcaniclastic sedimentary rocks. The basalt is tholeiitic with continental affinity. The upper sequence of the Povungnituk consists of sandstone and shale with minor basalt. The Povungnituk Group represents a continental rifting sequence.
The Chukotat Group consists of massive and pillowed basalt, hypabyssal ultramafic and mafic intrusions, and discrete and interflow sedimentary rock units. The basalt ranges in composition from Mg-rich olivine-phyric komatiitic basalt at the base through pyroxene-phyric to plagioclase-phyric tholeiitic n-MORB equivalents at the top. The basalts are of oceanic affinity and record the change from continental rift volcanism to oceanic crust volcanism.
Pre-tectonic mafic and ultramafic sills of gabbro, pyroxenite and peridotite intrude the Povungnituk and Chukotat sequences along and adjacent to major structures that fed the overlying basalts. The intrusions within the upper Povungnituk and lower Chukotat host the Ni-Cu-PGE sulphide deposits important to the region. Regional structure is dominated by east-west oriented fabric. All the rock sequences and stratigraphic groups are interpreted to be bound by thrust faults. The Cape Smith Belt was subsequently deformed by east-west trending and north-northwest trending folds during the Hudsonian Orogeny. There remains some debate about the amount of deformation of the nickel sulphide hosting mafic and ultramafic intrusive rocks, some interpretations are that the intrusions have suffered little deformation.
MINERAL DEPOSIT TYPES
The ultramafic bodies of the Cape Smith Belt host many Ni-Cu-Co-PGE sulphide deposits. These deposits are of three types: 1) magmatic segregation deposits of massive to disseminated sulphides located at the base of ultramafic units; 2) stratiform, disseminated sulphide deposits (“reefs�?) located within layered, differentiated mafic-ultramafic sills; and 3) remobilized sulphides in shear zones. The Ni-Cu-PGE mineralization has been previously described as mainly occurring within two currently defined geologic horizons. The first is the Raglan (or north) horizon, located at the base of the Chukotat Group and host of many of the known economic nickel deposits in the Cape Smith Belt. The second defined favourable horizon is the Delta-Belanger (or south) horizon, located within the Povungnituk Group. Ultramafic intrusions hosting nickel sulphide showings also occur elsewhere within the Povungnituk. A third horizon, the Rinfret horizon, is located to the north of the Raglan horizon, and is underexplored.
The Goldbrook Ni-Cu-Co-PGE bearing deposits are comprised of disseminated, net textured and massive sulphide hosted in east-west elongate mafic and ultramafic bodies, most commonly occurring at basal margins of the intrusive bodies. Net textured sulphides that form the largest mass of the deposits in the South trend are very important economically. Much emphasis has been previously placed on the massive sulphide style of mineralization as the primary exploration target in the region, and in the execution of exploration programs themselves with geophysics in particular being focused on the detection of massive sulphides rather than on bodies of disseminated, net textured sulphides with or without massive sulphides.
Disseminated sulphides in peridotite
GOLDBROOK EXPLORATION OVERVIEW
The first diamond drilling program occurred on the Goldbrook property in 1974 when Getty Mining Northeast Ltd. drilled four holes at the Getty Zone on the Belanger property. Significant intersections were made in 2004 with drilling on the Getty and Sylvie zones. Since 2003 to 2008, Goldbrook has conducted 5 years of exploration on its property (all years except 2005), and its previous option and JV agreement partner Anglo American Exploration (Canada) Ltd. (AAEC) conducted exploration in 2005 and 2006. Up to and including 2007, there has been 53,622.8 metres of drilling in 337 holes completed on Goldbrook held property. Table 1 documents the best drillhole intersections from the Goldbrook Raglan Project.
During 2003 and 2004 Goldbrook contracted AeroQuest Ltd. of Vancouver BC to fly an AeroTEM airborne magnetic-time domain electromagnetic survey over the properties. These data were employed in the planning of field surveys and generation of drill targets on the Wakeham, Ungava and Belanger properties.
Goldbrook conducted a large program in 2007 consisting of drilling, borehole EM, airborne VTEM geophysics and regional geology, sampling and prospecting.
The 2008 exploration program consisted of 12,000 metres of BQ size core drilling, a remote sensing program that covered large parts of the Goldbrook property, a regional geology and sampling program, interpretation of VTEM geophysical data collected in 2007, and reclamation of two camp sites previously used for exploration in parts of the Goldbrook property.
The 2008 program was successful with the highlight discovery of the new Mystery Ni-Cu-Co-PGE deposit delineated over 175 metres of strike length and to depths exceeding 300 m on some sections, and with additional intersections at the Sylvie and Pad-1/R2 deposit areas. These results have provided more than sufficient data and evidence to support a continuing exploration program at the Goldbrook Raglan property.
There are numerous other areas of interest / showings that warrant analysis and search for specific drill targets. Some of these areas are also candidates for further geophysical surveys or tests with methods such as gravity, walking magnetics, ZTEM, and SQUID-sensor ground EM, and possibly for more detailed VTEM analysis. In addition, analysis of regional geochemical data (rock, soil and till) may provide insights or support other evidence for drilling.
Drill on the Mystery prospect