The Boundary showing is underlain by the early Jurassic Limpoke pluton of the Texas Creek plutonic suite (189-195 Ma) consisting of monzodioritic to gabroic intrusive rock. The Limpoke pluton is a two-phase stock with a biotite hornblende quartz monzonite outer phase and medium grained hornblende monozodiorite inner phase. Leucocratic potassium feldspar megacrystic syenite dikes and plugs intrude the eastern and western borders of the pluton and surrounding Upper Triassic Stuhini Group sedimentary and volcanic rocks.
Locally, a mineralized quartz vein, up to 0.5 metre wide and 70 metres long, is hosted by monzodiorites and syenites. Lenses of wall rock and carbonate occur within the vein. Discontinuous mineralization in the vein comprises blebs and disseminations of pyrrhotite, pyrite and chalcopyrite.
Work History
The area was originally explored by Teck Explorations and Dupont in the early 1980’s, with work centering on the Tuff and New Limpoke occurrences (MINFILE 104G 121 and 104G 024). Between 1988 and1992, Integrated Resources explored the area as the Goat and IR claims and completed programs of geochemical sampling, geophysical surveys, geological mapping and a diamond drill hole, totalling 110 metres. In 1991, eight grab samples of the vein returned values up to 9.1 grams per tonne gold (Assessment Report 21998). In 2002, Newcastle Resources and Viceroy Resources staked the area as a part of the Target 1-4 claims and completed a prospecting program.
In 2014, Divitiae Resources spent 2 weeks on its Big Red property which covered the folllowing mineral occurrences: 104G 001 (Poke Showing), (104G 002 Gordon Showing), 104G 024 (New Limpoke), 104G 121 (TUFF), 104G 206 (TGR (North), 104G 207 (TGR Vein), 104G 208 (Barrington Vein), 104G 209 (Upper Cave Creek),104G 210 (West Grid), 104G 211 (Northe Barrington), 104G 212 (Target 4), 104G 213 (Boundary Vein), 104G 214, (Terry Creek),104G 215 (Jimmie), 104G 216 (Bob), 104G 217 (Zamba), 104G 218 (Spike, Waterfall), 104G 230 (GRAN 16). Divitiae collected 12 rock samples in the southern portion of the property. Selective samples ran above 1 per cent copper.
In 2017, Divitiae Resources contracted Precision GeoSurveys Inc. to undertake an airborne geophysical magnetic and radiometric survey in late September that covered all of the River of Gold claims totalling 536 line-kilometres. Divitiae's River of Gold property was the renamed Big Red claim group of 2014 with more claims attached extending 5 kilometres west covering Poker (104G 149). In October of 2017, preliminary prospecting was completed on high probability anomalies generated by previous ASTER analysis, and the new airborne geophysics. At this time 64 rock samples were collected. Work on the northern portion of the property failed to find any samples to be assayed. The complete airborne geophysical survey report is attached as an appendix within assessment Report 36930).
Results of the 2017 River of Gold ASTER survey are as follows. Four high probability clusters of phyllic alteration occur across the River of Gold claim block. Two clusters are coincident with high probability propylitic alteration and one is coincident with both propylitic and silica alteration. Several clusters of high probability iron oxide alteration occur throughout the River of Gold claims and indicate potential for gossan development. Advanced argillic and argillic alteration data suggests elevated clay formation surrounding a central zone of coincident phyllic-propylitic alteration in the centre of the River of Gold claim block. Similar elevated clay abundance occurs about 4 kilomtres to the southeast of the central phyllic target on the property. Layer-stacking of phyllic, argillic and propylitic alteration maps have helped identify areas in which coincident hydrothermal alteration may be present. This resulted in two such target areas being found. A 600 metre diameter broadly circular zone of weak propylitic and phyllic alteration enclosed by weak argillic alteration is located within the NE portion of the River of Gold claims. Company interpretation of the zonation evident from the suggested a high-level porphyry system. A second anomalous zone occurs in the central portion of the River of Gold claims where coincident phyllic-propylitic alteration is enclosed by argillic alteration.
In 2019 and 2020, Libero Copper and Gold Corp. completed programs of geological mapping; geochemical (rock, soil and talus fines) sampling; a 549 line-kilometre airborne electromagnetic (ZTEM) survey; three diamond drill holes, totalling 610.0 metres, and 24 reverse-circulation drill holes, totalling 3527.5 metres, on the area as the Big Red property.
