|Property||A large 13,834ha property covering 6 prospective Cu-Au porphyry targets, several high-grade Cu-Au showings and one significant Mo mineralized zone identified by prior drilling, geophysics and geochemistry.|
|Location||Omineca Mining Division of north-central British Columbia, Canada, 200 km NW of Mackenzie BC.|
|Summary||The Croy Bloom Property is located 200km northwest of Mackenzie British Columbia, Canada along the Omineca Mining Road. Previous exploration completed by Serengeti and other companies identified 4 primary porphyry Cu-Au targets, one Au dominant target and a number of early-stage prospective targets. In addition, drilling has partially defined the Davie Creek Mo porphyry system. Serengeti believes that other areas of the property are also underexplored and warrant further work.|
The Croy Bloom Property is located 200km northwest of Mackenzie British Columbia, Canada along the Omineca Mining Road. Historic exploration completed by Serengeti and other companies has identified four primary porphyry Cu-Au targets, one Au dominant target and a number of early stage prospective areas. In addition, drilling has partially defined the Davie Creek Mo porphyry system. Serengeti believes that other areas of the property are also underexplored and warrant further work.
Croy Bloom Mineralized Highlights
- Narrow, high grade Croy vein: 10.5% Cu, 15.7g/t Au
- Saddle Gully Zone: 7.7 g/t Au over 20.5m in prior drilling
- Soup Ridge: 0.41% Cu, 0.96g/t Au over 27m in prior drilling
- Bloom Cirque: 0.1% Cu over 113m in prior drilling
- Davie Creek Zone: 0.07% Mo over 203m in prior drilling
Plans Moving Forward
Southeast Kliyul Valley remains an underexplored target area characterized by interesting areomagnetic and resistivity geophysical features in an area entirely covered by glacial till. This area warrants an extension of the IP survey carried out to the northwest that identified an open IP chargeability anomaly. Further exploration to the northwest and southeast of the Raven target is also recommended. The drilling in this area has been relatively focussed. Additional drilling could be considered given the encouraging geochemical anomaly defined here by soil sampling.
Significant results from the 2011 and 2012 IP geophysical and prospecting campaigns in the Saddle Gulley Zone area need priority follow-up, including detailed mapping, with emphasis on structure and hydrothermal alteration, to better understand the property-wide geology and its significance and relationship to the other target areas. Widely-spaced, deep-penetrating reconnaissance IP survey profiles should be considered as a follow-up to the limited IP carried out over the Croy Veins, which indicated potential for more extensive sulphide mineralization at depth. Broad scale reconnaissance IP is also warranted along Soup Ridge and locally across Kliyul Creek valley to map the extent of widespread mineralized occurrences here and their possible relationship to the extensive QSP alteration zone that trends onto the property from Bap Ridge and the Kliyul property to the north.
Future work on the Croy Bloom property could be divided into two stages:
Phase 1: a 35 line km IP survey plus geological mapping and limited geochemical sampling assisted by a climbing team to access steeper as yet inaccessible areas to delineate drill targets. This IP program will focus on the Kliyul Valley and soup ridge;
Phase 2: a 2,500 m helicopter supported drill program of 5x500m holes to follow up the phase 1 IP program.
Location and Infrastructure
The Croy-Bloom/Davie Ck project is located 200km northwest of Mackenzie and 90km southeast of the Kemess Mine in the Omenica Mining province of north-central British Columbia, Canada (Fig. 1). The property is accessible by helicopter or logging roads, off the Omenica Resource Access Road that lies immediately to the east of the property.
The Omenica mine road lies immediately east of the Croy-Bloom property and was a haul road for the Kemess mine when it was in production. This road was plowed year round during operation. Power is also available near the property boundary on the east side along the Mine Road.
The property is underlain by Middle to Upper Triassic volcaniclastic and volcanic rocks of the Takla Group, which have been intruded by the Croydon Creek Ultramafic Stock, the Croydon Creek Pluton, the Kliyul Creek Pluton and a host of related dykes. These intrusive bodies comprise the northern end of the Hogem Batholith, a multiphase intrusive complex with latest Triassic to Middle Jurassic alkaline phases and Cretaceous calc-alkaline bodies (Garnett, 1978).
Compositional similarities, sub-volcanic phases and heterolithic volcanic-sub-volcanic-intrusive assemblages are thought to be in part, coeval with the ultramafic stock and Croydon Ck Pluton (Grexton and Roberts, 1991). Coarsely recrystallized hornfelsed rocks or intrusive breccia commonly marks the contact between Takla volcano-sedimentary rocks and Hogem intrusive bodies (Ferri et al. 1995).
Schiarizza (2004) subdivides the Takla Group into two major divisions and three units. The most widespread package comprises a heterogeneous assemblage of volcanic sandstones, siltstones and breccias, with local mafic volcanic flows, referred to as the volcanic sandstone unit (Schiarizza, 2004). A subunit of this package comprises similar rocks intercalated with locally abundant limestone and limestone breccia; these rocks are assigned to a sandstone-carbonate unit (Schiarizza, 2004). The third unit, referred to as the volcanic breccia unit, is dominated by massive breccias containing pyroxene porphyry volcanic fragments (Schiarizza, 2004). The majority of these units are weakly magnetic.
Croydon Creek Ultramafic Stock
The Croydon Ck Ultramafic Stock is a 1.8 km long by 1.2 km wide, slightly elongate, ultramafic intrusive body located in the southwest half of the property between Croydon Ck and Porphyry Ck. The stock comprises dark green to black, equigranular pyroxenite with 5 – 10%, fine to coarse-grained magnetite (Grexton and Roberts, 1991). The ultramafic stock mapped at surface conforms to the position of a strong airborne magnetic anomaly. The aeromagnetic anomaly suggests that the intrusive continues 2 km to the northwest, under Takla Group volcanics. The Croydon Ck Ultramafic Stock is probably an extension of the mafic-ultramafic Abraham Creek Complex, which extends approximately 24 km to the southeast. Within the project area, Schiarizza and Tan (2005) subdivide the Abraham Ck complex into a central unit of mainly clinopyroxenite, hornblendite and mafic gabbro, and a unit dominated by diorite, gabbro microdiorite that flanks the ultramafic rocks to the north and south.
Croydon Creek Pluton
The Croydon Creek Pluton occupies a large region east of Croydon Ck in the Bloom Cirque area. It forms a northwest trending elongate linear body that can be traced at surface for approximately 6 km. The pluton comprises hornblende diorite to quartz-diorite and includes the Davie Ck (Mo) Stock, a steeply dipping, tabular body of potassically-zoned granodiorite west of Croydon Ck. In the Bloom Cirque area, Grexton and Roberts (1991) recognise two distinct phases of diorite:fine-grained, hornblende diorite and locally quartz diorite and coarse-grained chaotically pegmatitic, xenolithic diorite (Grexton and Roberts, 1991). Contact relationships between the two phases are unclear. Surface mapping by TECK Exploration, of the eastern contact along the Croydon Ck Pluton, appears to conform to a sharp break in the magnetics. Government maps report the Croydon Ck Pluton as Late Triassic to Early Jurassic (?) in age (Ferri et al., 2001).
Kliyul Creek Pluton
The Cretaceous-age Kliyul Creek Pluton is exposed in the southwest corner of the property. The pluton varies from light grey quartz diorite to medium-grained biotite granodiorite (Schiarizza, 2004). Grexton and Roberts (1991), describe the pluton as potassically zoned, exhibiting decreasing biotite and grainsize and increasing potassium feldspar toward the northern contact with Takla Group rocks. Contacts with Takla rocks are generally sharp and irregular but locally disrupted by small northeast faults (Grexton and Roberts, 1991).