Research on genesis of the Baishipo Ag-Pb-Zn polymetallic deposit,Luoshan County,Henan Province

The Baishipo Ag-Pb-Zn polymetallic deposit occurred in NE trending Baishipo normal faulting zone based on Guishan Rock Formation of Mesoproterozoic, and has a close relationship with Mesozoic volcanic movements.Systematical and thorough analysis on ore-forming matters' sources,medium sources and ore-controlling factors with metallogenic mechanism has been finished by considering factors including geology of ore area,geology of deposits,trace elements,isotopes and fluid inclusions' characteristics.It has believed that this deposit belongs to medium-low temperature hydrothermal deposit formed during late volcanic movements.This deposit has been classified into three metallogenic stages in this paper: the earlier stage with Au mineralized in sheared zone,the medium stage with Ag polymetallic deposit formed during volcanic hydrothermal movements and the later stage with major Ag deposited during hypabyssal volcanic hydrothermal movements.It has also established a metallogenic mode for this deposit.