| The study area is located in Bashang area,northwest of Zhangjiakou City,Hebei Province,bordering Huade County,Inner Mongolia Autonomous Region in the north and West.The study area covers the west of Kangbao County and the north of Zhangbei County.The geotectonic location of the study area is located in the fold system of Inner Mongolia Daxinganling and the Sino Korean quasi platform structural unit,which belongs to Kangbao fold bundle and Tuchengzi platform dome.The study area is structurally developed with strong magmatic activity.There are many kinds of minerals in the study area,including coal and oil shale as energy minerals,tungsten and copper as non-ferrous minerals,new cash generated from precious metal minerals,beryllium as rare metal minerals,rubidium as newly discovered,gypsum,fluorite and graphite as non-metallic minerals.The geological,geophysical and geochemical exploration work in the study area was carried out earlier.There are mainly regional geological,geophysical and geochemical exploration work,as well as local mineral exploration work,but the research level is relatively low as a whole.Based on the geochemical survey data of 1:50000 soil and water sampling media in luominggou Chuchangdi dengyoufang area,Hebei Province,the distribution and collection of geochemical elements in the protoplasts in the study area are studied by means of exploration geochemical methods and techniques.Through the discovery,interpretation and evaluation of element geochemical anomalies,the target area and the target area are determined To divide the metallogenic prospect area.In this study,the contrast value method and local singularity method are mainly used to delineate the element geochemical anomalies in the study area.The reason is that the lower limit values of the main ore-forming elements in the North River sediment sampling area and the South soil sample area of the study area are quite different,so it is impossible to delineate the abnormal areas according to the same lower limit values of the anomalies.In addition,the south of the study area is covered by soil,and the ore-forming elements are abnormal Because the information is weak,the local singularity method can be used to extract the deep mineralization information of overburden.The main contents of this study are as follows:?1?The traditional statistical method was used to determine the lower limit of the anomalies of Ag,Au,Cu,Mo,Pb,Sn,W and Zn in the study area;?2?The geochemical anomalies of Ag,Au,Cu,Mo,Pb,Sn,W and Zn are delineated by contrast value method and local singularity method,and the results of the two methods are compared;?3?Seven anomalies of As2,As9,As10,AS12,As15,Ap17 and Ap27 were identified;?4?Dividing the metallogenic prospect area.The main results are as follows:?1?The traditional statistical method has determined the lower limit values of eight elements of Ag,Au,Cu,Mo,Pb,Sn,W,Zn in different sampling media in the study area,the lower limit values of eight elements in stream sediment samples are 0.18×10-6,1.3×10-9,36×10-6,1.6×10-6,45×10-6,5×10-6,4×10-6,60×10-6,the lower limit values of eight heavy metals in soil samples are 0.13×10-6,1.3×10-6,12×10-6,0.7×10-6,35×10-6,2.5×10-6,2,×10-6,50×10-6.?2?Based on the analysis and study of the distribution law,combination characteristics and genetic relationship of element anomalies in the survey area,31comprehensive anomalies were delineated in different sampling media,including 1 class a1 anomaly,2 class a 2 anomalies,3 class B 2 anomalies,7 class B 3 anomalies,7 class C 2anomalies and 11 class C 3 anomalies.Among them,8 key anomalies are delineated,which are as2?Lamagou?,as9?wolongtu mountain?,as10?Yongdetang?,AS12?Xiajiagou?,as15?Tantoushan?,ap17?Zhangshu Village?,ap27?Beishan Village?,ap31?Caojialiang?.In this paper,3 of them are selected,which are as2?Lamagou?,as9?Wolongtu mountain?and AS12?Xiajiagou?,for verification and analysis.?3?In the study area of Ag,Au,Cu,Mo,Pb,Sn,W and Zn,the local singularity method is obviously superior to the contrast value method in the study area.Especially in the study area of Southern soil cover area,the local singularity method delineates the abnormal areas that are not delineated by many statistical methods,and has better enhancement and extraction effect on the weak anomalies in the cover area Fruit.?4?Among the seven abnormal areas of As2,As9,As10,AS12,As15,AP17 and AP27in the study area,the effect of local singularity method is better than contrast value method.For example,if the Au element is delineated in the As2 abnormal area,the local singularity method delineates the Au element anomaly,but the contrast value method does not;in addition,the contrast value method does not delineate the Cu element anomaly in the As10 abnormal area,and the local singularity method delineates the obvious Cu element anomaly.The results show that in the process of element anomaly delineation,the local singularity method can enlarge the weak anomaly more,and is more conducive to the extraction of prospecting information.It is one of the ideal methods of anomaly delineation.?5?Two metallogenic prospect areas are divided into three parts:the high temperature and rare metal element based tungsten,rubidium and beryllium santaifang xiajiagou ore prospect area and the basic rock related metallogenic element copper based Zhangshu Linquan copper and graphite ore prospect area. |
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