Structural Relation between the Ore-controlling Structure of Gongchang Gold Deposit and Malanyu Metamorphic Core Complexes

摘要

The Gongchang gold mine lie on east of Malanyu metamorphic core complexes. Because the main detachment fault cut the cover layer to cause the reduction of the crustal stress, the increase of the regional magmatic activity and magma hot fluid upwelling. The fluid, however, could not break through the cover layers and happened hidden-explosion. So the ore-forming rock of Gongchang gold deposit is a kind of the tectonic breccia.