Shares in the company shot up last month on the release of the spectacular provisional results from the Extension Zone, with every hole containing samples that exceeded 30% zinc or 20% lead.
After the "over-limit" samples were analysed by titration methods, Cantex said the average grade of the massive sulphide intersections of the five holes was 107.6 g/t silver, 6.84% lead, 13.58% zinc and 0.05% copper over an average true width per hole of 9.15m.
Cantex reiterated the mineralisation had geological characteristics similar to other globally significant massive sulphide mines, referring to Sullivan in British Columbia and Australia's Broken Hill and Mount Isa.
It is proposing a C$10 million (US$7.5 million) drilling programme, to test an 800m strike length of the Extension Zone down to 400m, anomalous soil and rock samples parallel to the Massive Sulphide zone, and the gold mineralisation at the north end of the claim block.
"Weather permitting, Cantex hopes to commence work with two drills in late March," the company said.
It had raised C$1.75 million towards North Rackla exploration in July and reported a working capital deficit of $4.2 million at the end of that month.
Cantex shares have spent much of the year around the C20c mark and closed up more than 17%, or 9c, yesterday to close at 60c.
At that price it is capitalised around $7.5 million.