河南省萤石矿床地质特征、成矿规律及找矿方向OA北大核心CSTPCD

Fluorite is a strategic mineral in China.It is of great significance to improve the resource reserves of fluorite for the development of national economy.This study systematically summarized the metallogenic regularity of fluorite deposits and suggested the future prospecting direction by analyzing the geological characteristics,spatiotemporal distribution,and source of ore-forming materials of fluorite deposits in Henan Province.The results indicate that:(1)fluorites deposits in Henan Province are dominated by hydrothermal filled type,and can be divided into three fluorite metallogenic belts.(2)The fluorite deposits in Henan Province are mainly located within the Mesozoic granitic intrusions or along the surrounding NW-and NE-trending fault zones.Fluorite deposits in the Fangcheng area mainly occur in the strata near the granitic intrusions.(3)The metallogenic age of the fluorite deposits was about 120 Ma,and the fluorite deposits in the Fangcheng area may have formed in the Neoproterozoic.(4)The Mesozoic granitic magmatism or post-hydrothermal activity provided important materials and driving heat for fluorite mineralization.The rocks provided important fluorine for fluorite mineralization,and their rich calcium source may be the key to the enrichment of massive fluorite.(5)The ore-forming fluid in the main mineralization stage of fluorite should be low temperature,low salinity,and low density,and atmospheric precipitation played an important role in fluorite mineralization.(6)The key areas for fluorite exploration in Henan Province should be located in the northern belt and central belt where the Taihua Group and the Mesozoic granitic intrusions are widely developed,especially in the interior or surrounding areas of intrusions such as Heyu,Taishanmiao,Tianmushan,and Tongshan.