contact skarns As-Sb-Al Ag-Pb-Zn Au-W- calc-alk Au-Cu-alkalic AS-Al Au-Bi-TetW As-Sb-Au small elongate pluton veIns Ag-Pb-Zn sheeted veins veIns distal aplite pegmatite dikes skarns tensional zones replacement veins& lamprophyres disseminations Au-As veins low-angle faults structurally prepared roof zone thermaraureole hanging wall above pluton 刘继顺中南大学 采独笑顽石监事气势若虹铅变银刘继顺 中南大学 不独笑顽石生底事 气势若虹铅变银