Geochemical characteristics and Metallogeny of the huashugou (iron) Copper deposit in the north Qilian Mountains

摘要

Studies on REE, trace elements, stable isotopes, fluid inclusion and geochronology indicate that the Huashugou (iron) copper deposit was formed in a submarine rift near continental margin. The ore-forming Material mainly came from the Proterozoic basic volcanic rocks, sulfur and carbon mainly from the seawater. Following the development of the arc-trough-basin, the Proterozoic volcanic and sedimentary basement rocks were subjected to the interaction of the deep-circulating hydrothermal system, the ore- forming material was leached, transported and finally exhaled into the sea-floor to form the copper-bearing strata, while the late metamorphism made some of the ore-forming material activated, transported and enriched. This deposit is an exhalation-sedimentation and metamorphic iron) copper deposit.