The Gravity&magnetic Anomaly Characteristics And Ore Prospecting Direction Of LuanNan-LuanXian Area In East Hebei Provience

Jidong region is China’s important iron ore producer,second only to the Anben region.The LuanNan-LuanXian area is the key exploration area in recent years. The study area islocated in MaLanYu duplex anticline and ShanHaiGuan station arch transition area.Therehas one of the oldest metamorphic rock formation,and is rich in sedimentary metamorphiciron ore. There is rich in iron、gold and other ore deposit resources in jidong greenstone belt,and the research degree is relatively high. Jidong BIF-type sedimentary metamorphic ironore is the advantage deposit in this area, the deposit is produced in Precambrian ancientstrata. According to different scholars’ metallogeny research and demonstration ofLuanNan-LuanXian of jidong area, and analyze the representative orebody, gneiss, mixedgranite, rich ferrosilite rock formation of the magnetic characteristics of ore-bearing strataarea. And on the basis of summary and research past geological data, by processing themagnetic data, drawing the abnormal distribution zone, delineated the prospecting targetarea. At the same time by studying the predecessors’ experience of archean regionalprospecting in this area, comparative study the containing iron ore deposit formation in thearea from the actual.“SiMaChang” type iron ore deposit is a typical sedimentary metamorphic iron oredeposit in this area, ore deposits are mainly distributed in the QingLongHe large fault,southeast of RenGeZhuang large fault structure.MaCheng iron ore deposit is located in the Zhu—Ma Gravity&magnetic anomalyzone. This article discuss the relationship with abnormal by the comprehensive analysis ofmining area Gravity&magnetic characteristics and regional tectonic conditions. And revealthe orebody shape typical iron ore deposit in this area and geological characteristics ofMaCheng、SiJiaYing and DaJiaZhuang iron ore. The LuanNan-LuanXian area bedrock onwest of QingLongHe fracture buried depth>500meters on average because of theinfluence of quaternary cover and QingLongHe large fracture. When searching for hiddenmagnetite mainly by aeromagnetic anomalies, and connecting with the regional gravityanomaly. By aeromagnetic anomalies searching magnetite is fast and save. LuanNan-LuanXian area is mainly in the north east high gravity belts, local gravityanomaly is mainly reflects the basal ore body and the distribution of iron rich ancient strata.By processing the Gravity&Magnetic anomaly data of SiGeZhuang-DuHaoTuo, using thestack results of Gravity&Magnetic, presumption the magnetic body’s space and form.Verify the Gravity&Magnetic characteristics of mineralization anomaly.Through to the analysis of characteristics of Gravity&Magnetic anomaly data ofSiGeZhuang-DuHaoTuo sedimentary metamorphic iron ore (BIF). PredictLuanNan-LuanXian district distribution characteristics of iron ore with trap spatialmagnetic anomaly. Through the known ore bodies in regional anomaly zone to speculatethe ore-forming anomaly in the anomaly zone, combined with regional tectonic anddistribution ore-bearing strata in the area and use the experience in the processing ofexploration type BIF iron ore, eventually to delineate and forecast distribution andmetallogenic zone. And draw the key area for iron ore in this region.