Placing participants also get at option exercisable at 11c for every three shares subscribed, something that will also be offered for those who take up the rights issue.
The price of the rights will be the same as the placing, with shareholders being offered shares on a three-for-five basis.
Metminco is currently suspended on AIM and intends to de-list from the junior market on 17 October.
Earlier this month, the junior announced the acquisition of a laterite nickel project in the Solomon Islands.
The Jejevo project has an estimated exploration target resource of 10Mt-15Mt at grades of approximately 1.1%-1.3%.
Metminco also has gold assets at Quinchia in Colombia.