Yinshan anticline is the product of tectono-dynamic deformation-metamorphism.Along the axis ofthe anticline exists a brittle-ductile shearing zone which obviously controls the ore-formation.Mineralization occurs along...Yinshan anticline is the product of tectono-dynamic deformation-metamorphism.Along the axis ofthe anticline exists a brittle-ductile shearing zone which obviously controls the ore-formation.Mineralization occurs along the axis of the anticline in a width of about 1000m.In the mining area,volca-no-subvolcanic rocks of Early Yanshan period are divided into three cycles:I intermediate acidic dacite lavaand dacite porphyry;Ⅱacidic amphibole liparite and quartz porphyry;Ⅲ intermediate andesite porphyrite.Among them activities ofⅠand Ⅱ cycles are more intensive and are intimately related to the mineralization.Yinshan ore deposit is the result of combinative processes of tectono-dynamic and volcano—magmatic hydrothermal fluids,so that there are two centers of metallogenic zoning,one being the axialstrain zone of Yinshan anticline which is the center of first order,and the other being porphyry stock,2ndorder.展开更多
文摘Yinshan anticline is the product of tectono-dynamic deformation-metamorphism.Along the axis ofthe anticline exists a brittle-ductile shearing zone which obviously controls the ore-formation.Mineralization occurs along the axis of the anticline in a width of about 1000m.In the mining area,volca-no-subvolcanic rocks of Early Yanshan period are divided into three cycles:I intermediate acidic dacite lavaand dacite porphyry;Ⅱacidic amphibole liparite and quartz porphyry;Ⅲ intermediate andesite porphyrite.Among them activities ofⅠand Ⅱ cycles are more intensive and are intimately related to the mineralization.Yinshan ore deposit is the result of combinative processes of tectono-dynamic and volcano—magmatic hydrothermal fluids,so that there are two centers of metallogenic zoning,one being the axialstrain zone of Yinshan anticline which is the center of first order,and the other being porphyry stock,2ndorder.
