Igneous breccia system of the Shand porphyry Cu-Mo deposit, Northern Mongolia

The Shand Cu-Mo deposit is located in the Orkhon-Selenge depression, Northern Mongolia. It lies near Erdenetiin Ovoo porphyry deposit, which together define one of Mongolian’s most economically significant metallogenic belts. In (Au?) several ore related breccia types are associated with porphyritic granodiorite intrusions, and they contain pre-, synand post-mineralized stocks, magmatic-hydrothermal intrusive breccia. There genetically at least two type hydrothermal breccias have recognized i.e. Magmatichydrothermal presented spatially intrusions but extending sub vertical characterized by angular fragments/clasts supported or infilled minerals commonly indicative high temperature salinity (e.g. tourmaline, feldspar), silicas, carbonates sulphides (Cu, Mo, (Au)) matrix derived from fluids precipitation. May grade downwards into cupolas without pegmatite where occur approximately deep 250-1300 m depth. Intrusive mostly occurred contact between margin shallow depth mainly composed porphyry, dacite. Our drillhole relogging petrographical observations hosted Here, we present an integrated study involving detailed logging, to elucidate genetic relationship evolution for Also, propose that magmatic indicate emplacement igneous rocks initially dacitic magma composition.