The Riddarhyttan project is located in central Sweden 150 Kms northwest of Stockholm. The Riddarhyttan project is available for partnership. EMX acquired the Riddarhyttan license in 2016 while following up on historic iron mines with associated copper mineralization. These mines occur along a ~15 km belt of IOCG deposits with Co, Mo, REE’s and other metals. Past production of dominantly iron and some copper as well as cobalt and REE’s, mostly in Medieval times (iron produced until 1979). REE, Co, Mo and Zn mineralization also developed in vicinity of iron oxide deposits. Historic mining was focused on iron production, with copper mineralization generally ignored or considered waste.
The host rock consists of Paleoproterozoic (1.8-1.9 Ga) metavolcanic and metasedimentary rocks, dominated by rhyolite and interbedded carbonates with extensive sodic-calcic alteration: actinolite-albite (local scapolite) altered metavolcanic rocks (expected source rocks). Calc-silicate (skarn) alteration hosted in carbonate-bearing host rocks, and Mg-rich alteration (anthophyllite–cordierite) associated with massive sulfides.
There has been limited to no modern exploration on the trend. EMX is exploring for Cu and Au mineralization along strike and down dip of existing iron oxide mine trends (previous focus was iron mining). The massive sulfide horizons have also undergone only limited exploration in district.