Reworking intensity-a key factor leading to the formation of superlarge gold deposits in greenstone belts and metamorphosed microclastic rocks in China

摘要

The greenstone belt and metamorphosed microclastic rock-type superlarge gold de- posits in China are hosted in metamorphic rocks and later intrusive bodies. Sedimentation, re- gional metamorphism and ineralization contributed a lot to the formation of the deposits, so did remelting magmatic process to some deposits, but the deposits were finally formed by re- working processes. The key factor leading to the formation of superlarge gold deposits is the re- working intensity, which for superlarge gold deposits is reflected by the large-scale reworked source rocks and even ore materials of various sources, strongly oxidized ore-forming fluids with a long and repeated active history and stable geothermal heat current. The factor which decides the reworking intensity is the network consisting of structures of different classes.