河南省桐柏县老湾金矿地球化学特征及深部成矿预测

张宏燕, 赵焕, 郭鹏

Geochemical characteristics and deep metallogenic prediction of the Laowan gold belt in Tongbai County, Henan Province

ZHANG Hong-Yan, ZHAO Huan, GUO Peng

图3 老湾金矿区围岩蚀变 a—斜长角闪片岩中黄铁矿化呈细粒浸染状分布;b—主成矿期含黄铁矿等多金属硫化物的石英脉切穿二云石英片岩;c—成矿早期肉红色钾长石脉沿裂隙充填后被断裂错断;d—成矿晚期与石英胶结的碳酸盐脉沿斜长角闪岩裂隙发育

Fig.3 Country rock alteration of Laowan gold deposit a—pyrite mineralization is distributed in a fine-grained disseminated manner in the orthorhombic dischist;b—quartz veins containing polymetallic sulfides such as pyrite during the main mineralization period cut through difluorite schist;c—in the early stage of mineralization, the flesh-red potassium feldspar veins were filled along the fissures and then faulted and broken;d—in the late stage of mineralization, carbonate veins cemented with quartz developed along the fractures of plagioclase amphibole