Oct 10 (Reuters) - King River Copper Ltd KRC.AX :
* Unit, and Spectrum Rare Earths have signed a heads of agreement (hoa) to enter into a joint venture agreement
* SPX can earn a 51% interest in mt remarkable exploration licence application ela80/5007
* Spectrum may earn a 51% joint venture interest by funding initial $500,000 of exploration costs Source text for Eikon: ID:nASX9J7bWC Further company coverage: KRC.AX