The Gordon occurrence is related to the marginal phase of a large Early Jurassic stock that intrudes Upper Triassic volcanics of the Stuhini Group. The stock, called the “Limpoke pluton”, is part of the Texas Creek plutonic suite, consisting of monzodioritic to gabbroic 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, related(?) to the Late Triassic to Early Jurassic Copper Mountain Plutonic Suite, intrude the eastern and western borders of the pluton and surrounding Upper Triassic Stuhini Group sedimentary and volcanic rocks.
The plutonics and volcanics have both undergone intense potash metasomatism near contacts, with formation of biotite and potassium feldspar. The marginal phases of the intrusion are complex and show evidence of multiple intrusion.
The mineralized rocks consist of pink syenite porphyry and fine-grained dark green and pink porphyritic material that may be of volcanic origin. The syenite porphyry is a mottled pink and grey colour and is very magnetic. All the rocks are cut by veinlets of potasium feldspar with pockets of coarse biotite, epidote and magnetite. Disseminated pyrite mineralization is widespread. Scattered patches and disseminations of weak chalcopyrite mineralization with some malachite was observed in outcrops.
The Minister of Mines Annual Report of 1930 reports that a tunnel was driven west for 14 metres along a quartzose cross-fracture about 10 centimetres wide, carrying some chalcopyrite, bornite, and copper carbonate. The location of this work was identified as being about three kilometres north of the actual recorded claim site. The prospect was not considered of commercial interest at the time.
In 2014, Divitiae Resources spent 2 weeks on its Big Red property which covered 18 MINFILE occurrences. Divitiae collected 12 rock samples in the southern portion of the property. Selective samples ran above 1 per cent copper (Assessment Report 35466). No sampling was undertaken in the Gordon area.
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. 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 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. Several samples were taken in the area between the Gordon and the Terry Creek showings.
See New Limpoke (104G 024) for more detailed information and for the 2017 ASTER survey results. Also see the Terry Creek occurrence (104G 214) for possible related mineralization characteristics.
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.
