Exploration in Vopnafjordur was carried out by Malmis between 1991 and 1993 in the form of BLEG surveys and vein sampling The BLEG surveys returned somewhat inconsistent results, with the 1992 survey returning more promising results than the 1991 and 1993 surveys. Despite this samples taken mostly within a possible Caldera filling of a tertiary central volcano at Hellisheiði, showed abundant sulphides. Vein sampling carried out at the same time showed significantly more promise, with a number of veins showing significant Au enrichment. Follow up of the central volcano at the vein mineralisation found at Haugsá, produced samples with a high of 447ppb Au and 90% of samples returning Au values above 10ppb. The mineralised veins in the area therefore clearly show widespread Au enrichment which warrants further investigation.
Follow-up work was carried out by Melmi in 1997, who carried out stream sediment and helicopter-assisted rock chip sampling in the Flateyjardalur, Bleiksmyrardalur and Vopnafjordur areas. The rock chip sampling programme focused on areas of strong alteration, known quartz-carbonate-pyrite veining and in selected structural settings. As with the earlier BLEG surveys, stream sediment samples returned largely low values, however, rock chip sampling identified anomalous antimony, selenium and tellurium values in a rhyolitic centre in the north of the licence.
The historical data has been insufficient, exploration to define a current resource and the Company cautions that there is a risk further exploration will not result in the delineation of a current mineral resource.
2016 Field Program
NAMA carried out an exploration program in 2016, that began with a historical data review and initial targeting of volcanic/intrusive centres and structures of interest. This was followed-up by traverse mapping of targets and their surrounding areas.
In addition to mapping, grab samples of mineralized rock, vein material and altered material it was sampled by hand and assayed by multi-element ICP-MS and fire assay to ascertain key major, trace and precious metal contents. In addition, representative grab samples of country rock were also assayed by the same process to provide background levels for gold and any identified pathfinder elements.