Study On Geological Characteristics And Metallogenic Regularity Of The Gelouang Gold Deposit

The Gelouang Gold Mine is another large gold mine that was discovered in the West Qinling area in recent years.It is located in the deep fault zone of the Xiahe-Cooperation-Minxian region,and located in the North zone of the central Rift trough and the North fault fold belt in the West Qinling fold belt transition site.Through the analysis of geological characteristics,geochemical characteristics,spatial distribution characteristics of ore bodies,conditions of diagenetic temperature and pressure,genesis of ore deposits and metallogenic laws,the following achievements have been made:?1?The results of the analysis of the original Halo in the mining area show that the spatial distribution of elements such as Cu and Pb in the near corona and the abnormal distribution of elements As,Sb,Hg and Au in the front corona are basically the same.The formation and enrichment of gold deposits are closely related to the active ore-forming fluid rich in low and medium temperature elements.The tendency of As and Hg in the front corona is gradually increasing,and there is still a large prospect and space for prospecting in the deep part of the mining area.?2?A total of 78 ore bodies have been discovered and trapped in mining areas,six of them are main ore bodies,and 72 are other ore bodies.The spatial distribution of ore bodies are obviously controlled by fracture structures,and the developed ductile and brittle shear structures are the main power and hydrothermal sources of mineralization.The ore body is formed by multi-stage hydrothermal superposition,and the mineralization enrichment site is mainly located in the site of structural development and change,such as the fracture intersection site,the fracture and the intrusion rock mass intersection site.?3?The inclusion test results show that in quartz amphibole ores,quartz fluid inclusions belong to the H₂O-NaCl system,and the encapsulated gas phase components are mainly CO₂,and contain a small amount of CH₄ and H₂O.The average temperature is 120°C to 270°C,the salinity is less than 5.77%,and the density is also low.The capture pressure is 21.0 to 56.5 MPa,and the metallogenic depth is 2.10 to 6.02 km,with an average of 4.06 km.According to the comprehensive study,the mineralization fluid of the gold mine in Gelouang is shallow mid-low temperature hydrothermal fluid which is low-salinity and low-density.?4?Based on the analysis of the multi-periods,multi-phase and metallogenic relations of mineralization and surrounding rock alteration,it is initially concluded that the genetic type of the Gelouang gold deposit is a postmagmatic metaphase and mid-low temperature thermal liquid...