The Unga Gold Project covers portions of adjacent Unga and Popof Islands, approximately 900 kilometres (550 miles) southwest of Anchorage, Alaska. The project is located near the town of Sand Point (click here to see map) which has a commercial airport and port facilities. Access to Unga Island is by boat or helicopter, some 13 kilometres from Sand Point (click here to see map). The topography on the island is mostly undulating hills and the climate quite temperate relative to many areas of Alaska.
For the first time, the Unga Project is now a fully consolidated land package of some 250 sq km (100 sq miles) of mineral rights through an agreement with the Aleut Corp, an Alaskan Native Corporation and a surface land use agreement on Unga Island with the Unga Corporation. Mining claims owned by the Company consists of 16 patented mining claims ("Apollo-Sitka Mine") and six State of Alaska mining claims ("Shumagin Prospect").
The Shumagin Prospect is part of the Unga Gold Project, a district-scale gold-silver system, where localized high-grade mineralization is thought to be part of a larger, intrusive-related magmatic system(s) with the potential to yield additional exploration targets at depth and elsewhere within the Project Area.
The Apollo-Sitka Mine was the site of Alaska's first underground gold mine which from 1886-1922 produced a historically reported total of approximately 150,000 gold ounces at a historically reported grade of approximately 10 g/t gold.
With the consolidation of the lands on the Unga Project, Redstar Gold will be the first exploration company to comprehensively explore on a district-scale the numerous gold and silver occurrences that are known to exist on the islands.
Geology of the Shumagin Vein System
The Shumagin vein system consists of a sub-vertical zone of multi-episodic, cockade-colloform-crustiform banded quartz-adularia-rhodocrosite-green clay veins, stockwork and vein-breccias that are exposed on the surface for ~1,000 metres. The true-width of the vein system is variable from hole to hole but 7-10 metres of true width is a conservative average estimation. Pervasive silicification and anomalous quartz-sericite-pyrite veins and stockwork occur as a consistent halo to the vein system and commonly extend for more than 10 metres into the hanging wall.
The vein system has been localized along the Shumagin scarp, a northeast oriented steeply southeast dipping contact between a body of coherent Eocene-Oligocene basaltic-andesite (footwall) and a hanging wall sequence of massive-to-reworked dacitic pyroclastic flows and overlying epiclastic sediments. A complex arrangement of steeply-standing phreatomagmatic breccias and dikes were also emplaced along this contact and are interpreted to be pre- to syn-mineral.
Gold-silver mineralization within the Shumagin vein system is correlated to banded crustiform-colloform textured veins and vein breccias that contain very fine grained laminations of green clay + carbonate (rhodochrosite) and minor disseminated pyrite-galena-sphalerite and lesser chalcopyrite.
Sub-vertical dikes which have been cross-cut, moderately brecciated and entrained within the Shumagin vein system have been encountered within the hanging wall portion of the vein system. The dike is bound and cut by high-grade gold veins that occur in drill holes 15SH011 and 15SH012 and in more recent 2011 drill holes approximately ~190 metres down plunge of the vein system towards the northeast (11SH010: 0.55m of 738g/t gold & 408 g/t silver). This observed relationship has been noted in a variety of drill holes and suggests a connection may exist between the phreatomagmatic breccias, dikes and localization of high-grade gold-silver mineralization.
Following an exploration program in the summer of 2014, which delineated sites for further drilling, a successful 8 hole, 1500 m diamond drilling program was completed on the Shumagin Gold Zone in May 2015. Assay results, which contained several high grade gold and silver intersections,including 202g/t Au over 1.9m and 35.3 g/t Au over 2m, showed continuity of the Shumagin Gold Zone at depth and along strike.
During the summer of 2016, Redstar completed an advanced drill targeting exploration program at the Shumagin Gold Zone, and the Empire Ridge and Orange Mountain Gold Prospects which included:
- geochemical sampling, detailed structural mapping, and reconnaissance mapping and surface bedrock sampling;
- exploring other known prospects within 240 square km district-scale property position;
- expand & extend known mineralisation at the Shumagin high-grade gold zone.
Dr. Jeff Hedenquist, recognized global epithermal expert, visited Unga and provided a technical report comparing the project to significant other global epithermal gold systems and indicating strong upside potential.
Redstar commenced a ~1,500 meter drill program at the Unga Gold Project on October 14 2016, and was completed on November 4, 2016. Assays were released on January 19, 2017. The program extended the system upwards to a strike length of 950 meters, from 300 meters.
A followup geophysics program commenced in April 2017, with a subsequent drill program on May 16, 2017. Drilling completed in late June 2017 and assays are currently pending. Drilling indicated the structure continued along strike to a minimum strike length of 1,350 meters.