The Echo property adjoins the Bayonne (082FSE030) on the south; the main vein lies about 0.75 kilometre south of the Bayonne vein, at an elevation of about 2000 metres on the southwest flank of John Bull Mountain. It is one of a group of showings that collectively comprise the Bayonne mine area.
Bayonne Consolidated Mines, Ltd., incorporated April 1935, purchased the Bayonne property for $100,000 payable out of production; the adjoining Echo group was acquired by the company in about 1936. The Echo group was owned in 1904 by W. Maher, H. Anderson, and J. Baugh, of Nelson. Trenching, ground sluicing, and at least 250 feet of underground work was done in one or more adits during the initial period of exploration. In 1922 the Echo group of 6 claims, the Echo, Echo Fr., Ontario, Portland, St. Elmo, and Idaho (Lots 13014-13019 respectively) were Crown-granted to Harris Ginsberg. See Bayonne (082FSE030) for additional exploration and development details.
Hostrock to the veins is biotite hornblende granodiorite of the Mine stock, belonging to the Nelson intrusions of Middle Jurassic age. The main Echo quartz vein strikes east-west, dips 85 degrees south and has been exposed over a horizontal distance of at least 50 metres and a vertical distance of 16 metres in underground workings; surface workings expose this vein, which is 1 metre wide, for at least 300 metres, subparallel to the Bayonne vein. A subsidiary vein strikes 060 degrees and is approximately 25 centimetres thick. The vein is followed by a light-coloured felsic dike, about 1 metre thick, in the hangingwall; this dike, which is shattered, is reported to carry low gold values of about 1.5 to 2 grams per tonne. Alteration of the footwall comprises silicification, pyritization, and possibly argillization (described variously as "altered" and "talcy gouge"). Galena and pyrite are the only sulphides present.
Geophysical surveys (VLF, or very low frequency electromagnetic) by Goldrich Resources Ltd. in 1990 failed to show any strong conductors that could be ascribed to significant veins (Assessment Report 20982).
