BRECCIATION AND GOLD MINERALIZATION OF ORE－HOSTING ROCKS IN LAOYACHAO GOLD DEPOSIT
(Department of Geology; Central South University of Technology; Changsha 410083)
Abstract: It was pointed out through field and laboratory investigations that, ore-hosting breccia resulted from gas-liquid concealing explosion is fallen into mixed, broken-slackened and split phases. In addition, there are also two especial phases, that is, gushing phase and grouting phase; gold mineralization is confined within the gasliquid concealed-explosion breccia body and gold orebodies are completely included in the gushing phase and grouting phase, ore-forming Physico-chemical condition is of a low-pressure, low-temperature, sub-alkalinite and reducing condrtion; ore-forming fluid belongs to the Na-Ca-Cl type with a low salinity.
Key words: gold deposit; ore-hosting breccia; gas-liquid concealed explosion