In the Indosinian period from the Late Permian to the Triassic,a large-scale tectonic movement occurred in Minxian County with strong magmatic activity.The intrusion of medium acidic magma caused strata fracture and displace-ment,which provided an important power source,hydrothermal and ore bearing structure for the enrichment and mineraliza-tion of the mining area.Jiaochangba rock mass played a major role in the mineralization of the surrounding area.The exist-ence of intrusions is a prerequisite for the mineralization of skarn.Some skarn ore bodies occur in larger xenolith.By descri-bing the geological characteristics of the area and analyzing the origin of the ore body,it is concluded that the Mijiagou ore body should be a skarn type trap mineralization.
Mijiagou gold ore bodyJiaochang dam rock massgeological characteristicsdiscussion on the cause
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