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Assessment and Countermeasure of Geological Hazard in a Typical Coal-Mined Collapse Area in Jiaozuo City, Henan Province
On the Relation of Au Mineralization with Wallrock Alteration for Altered Rock Type Gold Deposits——By the Example of the Dongwan Au Deposit
Discovery and Significance of the Shagou Lead-Zinc Deposit in Jiyuan, Henan Province
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