贵池黄山岭层控矽卡岩及铅锌矿床成因

黄山岭层控矽卡岩为钙铝榴石矽卡岩，为奥陶系汤头组泥灰岩经热接触变质作用生成。铅锌矿体叠加在层控矽卡岩之上，成矿作用与富钾钙碱性岩浆岩密切相关的热液活动有关。成矿物质以岩浆热液来源为主，兼有变质热水活化转移的同生沉积矿源。

Genesis of Strata-bound Skarn and Pb-Zn Deposit at Huangshanling

The strata bound skarn type Pb Zn deposit at Huangshanling in Guichi occurred in Ordovician Tang-tou formation and Baota formation,The Pb Zn ore body was mainly limited within the strata bound skarn and con-trolled by Northeast structure system with its related second order cracks.The characteristics of geology,mineral typomorphism,geochemistry and stable isotopo of skarn provide some proofsthat skarn was formed by muddy limestone in the process of hot contact metamorphic action and its waterhot origin re-sulted from anatectic batholithic granite.The Pb Zn ore bodies superposed on strata bound skarn in the form of seep-age dissemination from cracks.The characteristics of sulfur and lead isotope compositions of galena indicate that ore forming materials were derived mostly from mantle with partial crust,of which mantle material is about 69.61%andcrust material 30.39%.Therefore,the Pb Zn deposit at Huangshanling is closely correlated with K rich calc alkalic rock series in genesis.