The Thumper showing occurs within the McLymont graben, just west of the southeast bounding Newmont fault, in an area dominated by Upper Paleozoic Stikine Assemblage rocks. The showing area is underlain by small fault-bounded blocks of massive grey crinoidal limestone. These are contained within pyroclastic rocks, mainly agglomerates and tuffs. To the southeast, across the Newmont fault, Late Devonian monzonite of the McLymont Plutonic Suite forms a large plutonic mass.

Limestones exposed on the Gab 6 claim contain mineralized fractures traceable for 200 metres. Widths approaching 1 metre have yielded silver assays to 328.46 grams per tonne silver (Assessment Report 18496). Galena, sphalerite, tetrahedrite and malachite are found discontinuously hosted in a barite gangue. A select grab in 1990 yielded 115 grams per tonne silver, 16.2 per cent lead and 1.17 per cent zinc (sample 43353, Assessment Report 21151).

In 2019, work completed by Crystal Mining Corp. resulted in soil and rock geochemical analyses that led to newly discovered occurrences and to a multi-element geochemical anomaly spread over an 8 kilometre by 4 kilometre footprint (the Chachi Corridor) spatially associated with the McLymont Fault structure. An Induced Polarization (“IP”) ground geophysics survey completed in 2019 has detected a chargeable conductive anomaly within the soil chemical anomalies and occurrences in the footwall of the Mclymont Fault. Over 2000 soil samples, 2000 hyperspectral measurements, and 800 rock samples were collected from this area. Anomalies area include high-grade gold-silver-copper sulphide at the new Leo discovery, high-grade silver, zinc, copper, lead with barite in the Cuba-Thumper Trend (104B 334,440, 445) and high-grade nickel, cobalt, copper, silver arsenide/sulphide associated with stockwork copper sulphide mineralization in the new Brass Rose and Grey Rose occurrences. The Thumper of the Cuba-Thumper trend is presumbably within, and near the southern end, of the Chachi Corridor.

Exploration of the Cuba showings identified high-grade silver, zinc, copper, lead sulphide mineralization associated with barite along the 3.2 kilometres long Cuba-Thumper trend (MINFILE 104B 334, 440 and 445) to the east of the Mclymont Fault corridor. Grades up to 2,350 grams per tonne silver, 15.2 per cent zinc and up to 5.4 per cent copper were followed up by chip-channel sampling which reproduced high concentrations of silver, zinc, copper and lead over 1.5 to 4.8 metres wide intervals (Crystal Lake Mining Corp., News Release, Oct.10, 2019).

Work History

In 1988, a limited geological reconnaissance field program was conducted on the Gab 6 claim on behalf of Thumper Resources Corp (Assessment Report 18496). The program consisted of several prospecting and mapping traverses combined with rock chip sampling. Fifty three rock samples were assayed. In 1990 continued exploration and evaluation by Thumper took place on the Gab 6 including: geological mapping, prospecting and soil geochemistry sampling (Assessment Report 21151). Twelve rocks and 179 soil samples were collected.

In 2013 Geotech Ltd. carried out a helicopter-borne electromagnetic (ZTEM) and aeromagnetic geophysical survey for Romios Gold Resources Inc over the Newmont Lake Block, comprising parts of the Newmont Lake property (Geophysics Report, Assessment Report 35016, Appendix VI). The following 21 mineral occurrences were covered by the survey: Ken (104B 027), 72 (Dirk) (104B (114), McLymont (104B 126), Northwest (McLymont), (104B 281), Jazzman (104B 282), Ridge (104B 325), Gab Northwest (104B 333), GAB 12 (104B 335), GAB 11 (104B 336), NEW (104B 379), Telena (104B 428), Bren (104B 429), Arseno (104B 432), Mon 2 (104B 433), Glacier Zone (104B 438), Camp Ridge (104B 441), Kirby NE (104B 442), Black Bear (104B 459), 2Bad (104B 460), Bridget (104B 462), O'Neil (104B 463).

In 2014, Romios Gold Resources Inc. conducted a prospecting and sampling program that included the evaluation of various showings and mineralized occurrences on the Newmont Lake and Trek Properties. A total of 314 rock chip samples and reconnaissance rock samples and 26 stream silt samples were collected.

In 2015, Romios Gold reported that a program of additional prospecting and sampling was carried out on the Burgundy Ridge discovery (Exploration and Mining in British Columbia 2015, page 135).

No work is reported for 2016 or 2017.

In January and February 2018, Geotech Ltd. carried out a helicopter-borne Versatile Domain Electromagnetic (VTEM) and aeromagnetic geophysical survey on behalf of Romios Gold Resources Inc. The survey covered three claim blocks: DIRK, KEN and NORTHWEST comprising parts of the Newmont Lake property and covered a total of 714 line-kilometres (Assessment Report 37492, containing Geotech Ltd Geophysical Report (Appendix Two)). The GAB 11 occurs within the Northwest Block which also covers the following mineral occurrences: Northwest (McLymont), (104B 281), Jazzman (104B 282), Gab Northwest (104B 333), Cuba South (334), GAB 12 (104B 335), GAB 11 (104B 336), Arseno (104B 432), Syenite (104B 439), Cuba North (104B 440), Camp Ridge (104B 441), Kirby NE (104B 442), Kirby SE (104B 443), Thumper (104B 445), Black Bear (104B 459), Ray (104B 696), Arseno Ridge (104B 709), Vera (104B 710), Gerry (104B 713). The Thumper showing is situated just south of magnetic high and less than 1 kilometre northeast of another high. The nearest VTEM anomaly is about 2 kilometres east of the Thumper.

In December 2018, Crystal Lake Mining announced that it had acquired a 100 per cent interest in the 436 square kilometre Newmont Lake Project from Romios Gold.

In 2019, Crystal Lake Mining Corp conducted a drill program, on the Burgundy Ridge prospect area (104B 325) and the Northwest deposit. They also conducted extensive grassroots exploration. Crystal Lake sampled and mapped the Cuba-Thumper trend along its 2.5 to 3.2 kilometre length. This trend is found between the Cuba prospects (104B 334 and 440) in the north and Thumper (104B 445) to the south. The trend is characterized by a high-grade high-grade silver-zinc-copper-lead barite system.

See Northwest (104B 281) for details of work after the amalgamation of tenures by Romios Gold Resources Inc in the 2000s, when airborne geophysics was done over significant land areas.

Also see Cuba South (104B 334) for related geological information.