Geology and Mineralization
The Property is in the southern part of the Abitibi Greenstone Belt which is itself within the Superior Geological Province. The overall geometry of the southern Abitibi Greenstone Belt is of east-west trending lithologic sequences that vary in composition from ultramafic through to felsic rocks and are primarily of volcanic origin. The volcanic sequences have been intruded by volumetrically significant mafic to felsic batholiths. The Destor-Porcupine Fault Zone generally trends from 070˚ to 090˚ in the Ontario portion of the Abitibi belt between the Porcupine Camp through to the Harker-Holloway area. The Porcupine Camp is the largest orogenic Archean lode gold camp with historic plus modern gold production and resources of over 2,150 metric tons (Bateman, Ayer and Dube, 2008).
The Property is principally underlain by mafic volcanic rocks that are intruded by two intrusive bodies that are roughly circular to slightly elliptical in plan and are both approximately 1 km measured from northwest to southeast and 1.5 km measured from northeast to southwest. The Main Zone is an area of structural deformation defined by a zone of brittle fracturing with quartz veining and a quartz vein stockwork with brecciated, angular syenite fragments in the vicinity of the open pit and underground workings. The stockwork breccia and related oriented veining are related to one or more faults that strike approximately 045º to 055º. The corridor of brittle deformation is in the order of tens of metres in width in the open pit and is bounded on the southeast by a fault that is referred to as Golden Arrow Fault. The Golden Arrow Fault has an apparent dextral displacement of ~50m where the contact between the volcanic rocks and the syenite has been mapped in the underground and open pit excavations.
Gold mineralisation on the Property is hosted by both volcanic and intrusive rocks. The primary control on mineralisation is structural; the location and character of the structures, and therefore the nature and distribution of mineralisation, is apparently inluenced in part by rheological contrasts between different lithologies, thus rock types represent important secondary controls with the known gold mineralisation found in structures near the contacts of the intrusive rocks. In the case of the Main Zone where it has been developed underground and by the open pit all of the significant mineralisation is hosted by the felsic intrusive. Mineralisation in the vicinity of the Northwest Contact Zone is primarily hosted by volcanic rocks that are proximal to the felsic intrusive plug.The Property hosts several structurally controlled zones (with associated quartz, carbonate, pyrite, sericite and hematite alteration) within which there are anomalous to potentially economic levels of gold mineralisation that are generally associated with more intense quartz-carbonate-pyrite alteration.
Most of the past exploration and development has focused on the Main Zone. Additional mineralisation in quartz veins in volcanic rocks has been identified in the Northwest Contact Zone and drilling from the 1940s identified what appears to be a continuous narrow zone in the syenite to the south-east of the Main Zone that appears to be similar in orientation to the Main Zone along the trend of the Golden Arrow Fault. On the basis of the historic drilling and open pit production the Main Zone appears to have a shallow rake (30º to 45º to the southwest). It is not clear if this apparent rake is a reflection of a plunge related to deformation or if it is a function of intersecting structural and/or lithological features. As mentioned earlier, there is a clear foliation in the volcanics indicative of regional deformation that is not apparent in the syenite which implies that the syenite and later veins have not been subject to the degree of deformation as the volcanics.
The Property hosts several structurally controlled zones (with associated quartz, carbonate, pyrite, sericite and hematite alteration) within which there are anomalous to potentially economic levels of gold mineralisation that are generally associated with more intense quartz-carbonate-pyrite alteration.
The Main Zone is hosted by a breccia that consists of angular felsic intrusive fragments in a quartz-carbonate matrix. The amount of brecciation and the nature of the veining vary from occasional narrow veins cutting the syenite to, most commonly, a breccia that, by virtue of the highly variable vein orientations and angular felsic intrusive fragments, is interpreted as a hydrothermal breccia. The boundaries of the brecciated and altered zones are not sharp, and the intensity of alteration associated with them is quite variable. In general the zones are easily identified by the substantial amounts of quartz and associated pyrite, sericite and hematite alteration.