The Zamba occurrence is located near Pokey Creek, a north-flowing tributary of Limpoke Creek.
The Zamba area is underlain by the Early Jurassic Limpoke pluton (Texas Creek Plutonic Suite), 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 intrude the eastern and western borders of the pluton and surrounding Upper Triassic Stuhini Group sedimentary and volcanic rocks.
Locally, an intensely K-feldspar altered (plus/minus biotite) pink megacrystic syenite porphyry with blebby disseminated chalcopyrite. In 2004, chip sampling returned 0.56 per cent copper and 0.86 gram per tonne gold across 6.0 metres (Assessment Report 27765). The intensity of K-feldspar weakens away from the creek bed as does copper mineralization, suggesting that the control for alteration and mineralization is a northwest-southeast trending fault structure which parallels the creek valley.
Work History
The area was explored by Kennco between 1963 and 1965, Teck in 1982 and Integrated Resources Ltd between 1989 and 1991. Kennco drilled a few holes (see Poke (104G 001)) with negative results within an IP resistivity target and Integrated Resources drilled one hole on the main showing. In 1994, the Bob 1 claims were staked by D. Either and later optioned, in 2004 by Canadian Empire Limited.
In 2004, Canadian Empire Exploration Corp. collected a total of 55 rock samples from the various surface showings concentrating predominately on the Discovery, Zamba and Spike Showings (Assessment Report 27765). The Zamba showing area comprises rusty, muddy talus on the east side of the Bob North Gully dry stream valley and the showing could only be exposed by hand digging a trench into the top of weathered crumbly subcrop.
In 2014, Divitiae Resources spent 2 weeks on its Big Red property which covered 18 MINFILE occurrences including the Gran 16 occurrence. Divitiae collected 12 rock samples in the southern portion of the property. Selective samples ran above 1 per cent copper (Assessment Report 35466).
By 2017, Divitiae had expanded their Big Red claim group extending it 5 kilometres more to the west, covering the Poker (104G 149) occurrence as well as the previous 18 that were covered. Divitiae changed the property name from Big Red to River of Gold and undertook an airborne magnetic and radiometric survey in late September that covered all of the River of Gold claims totalling 536 line-kilometres. 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.
See New Limpoke (104G 024) for more detailed information and for 2017 Airborne magnetic and ASTER survey results covering the Zamba area. Also see Poke (104G 001) for related work history details.
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.
