Observation and study on geological characteristics of dykes and mineralized structures in Hongqiyingzi Pb Zn deposit show the sequence of NE granite porphyry dyke→diorite porphyrite→mineralized slruclure→NW dyke. The early NE granite porphyry dyke serves as optimum transportation chan- nel of ore fluid and ore hosling space. On the spot of the deposit the structural-mineralized zones generally stretch along the early NE dyke.
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