GALLOWAY PROJECT ECONOMIC GEOLOGY OVERVIEW
There are at least 10 named, drilled Au and Au-Cu (-Mo) showings on the claims plus multiple occurrences with varying amounts of work. Previous operators on the Galloway project had commonly noted zones of strong gold values which could not be correlated between drill sections or trenches. This appears to be a result of locally induced, abundant structural permeability which allowed hydrothermal activity to follow multiple shears within a large volume of rock, rather than concentrating in a single shear zone or vein. Detailed surface mapping and drilling tends to find 2, 3 or more conjugate, subparallel or seemingly unrelated gold-bearing structures at varying orientations, along with further barren structures in the same area; deformation directions also vary between showings. This structural complexity is not always typical of the area proximally north of The Break, where many of the numerous gold mines are hosted in faults / shears considered subsidiary and related to The Break itself (south of The Break, the Archaean rocks are covered by Later Cobalt Group metasediments). Much of the difference at Galloway can be attributed to 2 important, slightly discordant intrusions of highly divergent morphologic and metallogenic character: a 2 km X 3 km alkaline (syenite) porphyry stock in the northwest part of the property and an 800m - 1300m thick, folded gabbro-diorite dike / sill in the east. Each of these intrusive units have both caused and localized extensive shearing (including a post-mineralization overprint), each was responsible for a local magmatic / convective hydrothermal event and each has associated gold showings of a distinctly different nature. (See the GEOLOGY section for more detail.) The southern part of the property is covered by an ENE trending, tongue-like apophysis of the Proterozoic Cobalt group metasedimentary package, which is considered to represent in-fill sedimentation of the paleo-valley formed by erosion on the LLCF (The Break).
The Baie Renault syenite porphyry stock and its directly associated structures host the Galloway-Pitchvein (GP), Hendrick, Fayolle (Renault) and Hurd showings. These occurrences carry a notable chalcopyrite-molybdenite assemblage, attributable to the proximal alkaline porphyry intrusion, leading various authors to propose a porphyry deposit-type affinity (Duuring and Hageman, 2002; Silver Century, 1995, Quebec government mineral showings files, Couture et Marquis, 1996), with implications for large tonnages. The Galloway-Pitchvein-Hendrick corridor in particular shows a porphyry deposit character, as Au values may occur with minor disseminated sulphides and weak silica (-carbonate) stringers or alteration.
The gabbro-diorite dike / sill and its marginal structures host the Baie du Canal, Island, and Sanborn showings. The 2 former are quartz-carbonate-pyrite affiliated gold showings, the latter primarily a Cu showing (with no Mo), which suggests a remobilization of gabbro-hosted magmatic chalcopyrite.
The Soaker Hill showing appears to differ from the other Au occurrences on the Vantex properties, being hosted exclusively in early-stage calcite-chlorite-pyrite veins; silica here is not the best gold indicator (GM49129, P.20).
The varying character of the showings and their surroundings suggests at least 4 environments for Au mineralization exist on the property, each the result of discrete or partially overlapping metallogenic events.
1. Early stage (pre-orogenic) hydrothermal Au related to rifting and volcanism
2. Syn-orogenic hydrothermal Au-(Cu) related to intermediate to felsic plutonism
3. Porphyry Au-Cu-Mo related to alkaline plutonism
4. Lat to post-orogenic hydrothermal Au driven by emplacement of porphyry intrusives
5. In addition, the nearby Francouer / Wasamac mines (7km to the east) show a close relation between gold and albite-pyrite alteration related to local albitite dikes.
6. The nearby Aldermac Cu-Zn-(Au-Ag) mine highlights the potential for VMS deposits in the area as well. There is a full bimodal volcanic suite, extensive felsic to intermediate tuffs, and bands of primary volcanogenic sulphide on the Galloway claims.