Metallogenic Geological Characteristics and Metallogenic Regularity of Silica Ore in Ningxia
The silica ore is the dominant mineral species in Ningxia,there are 34 basic identified silica ore areas.The types of silica ore include metamorphic type,metamorphic type,mechanical deposit type and placer type.The Changcheng period,Miocene and Oligocene are the main metallogenic periods.Based on the study of metallogenic geological rules of existing deposits(points),on the basis of metallogenic belt in Ningxia,seven Ⅳ-grade metallogenic subregions(belts)and two Ⅴ-grade ore concentration areas related to silica resources are identified,the spatio-temporal distribution rules of silica ore are summarized.Five metallogenic series related to silica deposit were determined and the metallogenic pedigree of silica ore was summarized.The research on metallogenic regularity of silica ore is improved,which provides a theoretical basis for the potential evaluation and prediction of silica resources in Ningxia.