Geochemical Characteristics And Metallogenic Prospecting Prognosis Based On Stream Sediment Survey In The Area Of Xinglong County,Hebei Province

The research area of this paper,located in the east of Hebei Province Xinglong County area,which is a semi-arid low-middle hilly area.This study area is west section of the Malanyu complex anticline in Yanshan platform fold belt of North China platform,growthed the Stratigraphic completely.And in this area,with rich mineral resourcesand superior geological conditions,however,the tectonic is pretty complex,the magmatic actived strongly,the increasing of human activities.Futhermore,it is an important part of Yanliao metallogenic belt in northern China and an central ore concentration area of molybdenum,gold polymetallic deposits in Hebei Province.With the geological environment background and exploration accuracy requirements of this study area,taked the 1/50000 geochemical survey of the study area by employing 1/50000 stream sediment geochemical survey maily and supplementing by 1/50000 soil measurements.The geochemical characteristics of the area are basically identified.The distribution,concentration and dispersion of elements in the area are analyzed synthetically,in the area,the results show that the main metallogenic elements are Au?Ag?Mo?W?Rb and the vital prospecting indicators include As?Sb?Cd?Cu?Pb?Zn?Bi?Sn?Li?Nb and so on.In this study area element combination could be divided into 4 groups,including iron-friendly element sequence(Cr-Ni-Co),middle and nonferrous metals low temperature element sequence(As-Sb-Cd-Au-Ag-Cu-Pb-Zn-Hg),nonferrous metal high temperature element sequence(W-Mo-Bi),and rare(energy)element sequence(Li-Nb-U-Rb-Sn).Meanwhile,in this area,identified 93 synthetic anomalies,which include 29 anomalies of class A,42 anomalies of class B,22 anomalies of class C.What's more,When starting the work of the anomaly evaluation put in geological indicators on basis of traditional geochemical indexes,made it more comprehensive and three-dimensional.More significant anomalies contain AS4?AS20?AS26?AS36?AS59?AS67 etc.At last,combined with regional metallogenic type and ore-controlling factors,in accordance with anomaly and its distribution characteristics,regional metallogenic geological conditions,dividing into the metallogenic prospective area and prospecting target area.And the quantitative prediction and evaluation of resource potential in 6 prospecting target areas are carried out by applying the theoretical basis of metal supply and metallogenic rate.It involved potential of small gold deposits named target No.1,potential of medium tungsten deposit named target No.2,potential of medium molybdenum deposit named target No.3,potential of large silver deposit named target No.4,potential of superlarge rubidium deposit named target No.5,potential of medium gold deposit named target No.6.