Geology of the Arera-Vedra Valley mining area (Gorno district, Orobic Alps, Italy)

The 1:10,000 geological map of the Arera-Vedra Valley area covers an area of about 12 km2 inthe Orobic Alps (Lombardy, N Italy), and is accompanied by five underground mapscorresponding to different levels of historic mining works. The area is characterized by aTriassic stratigraphic succession that hosts one of the most important Zn-Pb mining districtsin Italy (Gorno district). Original surface and underground geological mappings have beenintegrated with the analysis of drillhole stratigraphies and historic underground geologicalmaps. Detailed geological cross sections correlating surface map data with those of theunderground mining tunnels have been done. This work proposes a new maprepresentation that is consistent with new interpretation of the geometry of the orebodiesat depth, to serve as a tool for mining purposes (targets definition, mine design) and for abetter understanding of the genesis of the Gorno ‘Alpine-type’ deposits