Aftermath announced a letter of intent yesterday to acquire the project by purchasing SSRM's shares in Peruvian holding company Sociedad Minera Berenguela SA, for US$13 million in staged cash payments, C$3 million in shares and a sliding scale net smelter returns royalty.

It's the latest deal the explorer has struck with the producer.

The pair had reached agreement in May for Aftermath to acquire SSRM's 20% share of the Cachinal silver-gold project in Chile, to give Aftermath full ownership of the past-producing project.

Berenguela has an historical measured and indicated resource containing 98 million ounces of silver and 624 million pounds of copper, plus an indicated 28Moz of silver and 147Mlb of copper.

A 2018 scoping study, which Aftermath said it hadn't verified, had indicated initial capex of US$260.3 million for a 12-year mine producing an average annual 4.85Moz of silver, 13,883 tonnes of copper, 96,087t of manganese in MgSO4 mono-hydrate and 5,098t of zinc.

Upon closing the proposed transaction, Aftermath said it planned to immediately review both the exploration potential and the scoping study and define the scope of a prefeasibility study.

Aftermath also has the option to acquire the past-producing Challacollo silver-gold project in Chile from Mandalay Resources.

"Combined with the organic growth we hope to achieve at Challacollo, we believe it positions Aftermath as one of the preeminent silver development companies," president and CEO Ralph Rushton said yesterday.

Aftermath had last raised $1.5 million at 20c per unit in May, with the net proceeds intended for business development activities, maintenance costs at Challacollo and Cachinal and for general working capital.

Sprott held 16.2% of the issued shares at July 13, according to a recent presentation, which also noted the company had C$3 million of cash on hand.

Aftermath (TSXV: AAG) shares have ranged from C10-55c over the past year and closed up 5.4% yesterday to 48.5c, capitalising it about $44.5 million (US$33.3 million).