Geochemical Data Processing And Tagets Optimization In Eastern Kunlun Orogenic Belt,Qinghai Province,China

There is rich in mineral resources in eastern Kunlun orogenic belt,Qinghai Province,China.A series of large and medium-sized deposits have been discovered,such as Deerni copper deposit,Tongyugou copper deposit,Saishitang copper deposit,Rilonggou tin deposit,Kaihuagnbei gold deposit,Wulonggou gold deposit and Hutouya,Sijiaoyang,Laningzaohuo,Kengdekeke skarn lead-zincpoly metal ic deposit.There has made great progress in mineral exploration along with the discorvery of Kaerqueka,Wulanwuzhuer porphyry copper deposit,Xiarihamu Ni-Cu sulfide deposit,Dachang gold deposit and so on in recent years,especially,which shows the great potential of ore prospecting.The thesis focuses on Marine volcanic type copper-cobalt deposit,porphyry-skarntype copper polymetallic gold deposit,fractured altered rock-type gold deposit,in Eastern Kunlun Orogenic Belt.This paper deals with fine processing and fully exploit the geological significance of the regional geochemical data of eastern Kunlun Qinghai metal ogenic belt guided by the geological connotation method and "Xieyo u" metal ogenic prediction method.The combines of abnormal recognition and abnormalit y evaluation to eliminate the interference of human factors using the anomaly map of metal ogenic type and the map of ore forming intensity anomaly.We divide the metal ogenic distant area and delineate the prospecting target area on the basis of the above,and evaluate metal ogenic potential.The contribution of this dissertation includ es :1.The regional geochemical data are divided into different partitions reasonably Based on considerations on various factors such as geochemical landscape differe nce,geological background difference,testing error between standard formats,Characterist ics of supergene geochemistry and so on.We extract geochemical anomaly anomaly information making use of the favorable degree of mineralization.Using this method,the false anomaly caused by high background field has been eliminated effectively,and gentle anomalies or indistinct weak anomalies has been prominentde.Better reflecting the characteristics of anomalies in the region.2.The regional geochemical characteristics of the typical deposits of marine volcanic type copper(cobalt),porphyry-skarn copper polymetallic ore and crushed-alteration rock type gold deposits were systematically dissected to ful y excavate metal ogenic elements,main ore-forming elements and environmental indicator elements characteristics of the same deposit types,furthermore explore and summarize the regional geochemical element combination rule between the types of deposits?Based on the theory of "Xieyou" metal ogenic prediction,the specific element combination method is used to characterize the abnormal characteristics of the metal ogenic types and the regional geochemical anomaly patterns of the Qinghai eastern Kunlun metal ogenic belt are established.3.The distribution characteristics of diffidient types of deposits are reflected by the mineralization types abnormal maps of characteristic element combination,and only the anomalies associated with the deposits are highlighted.Other types of deposits are not shown.The complexity of the elements is used to screen and evaluate important anomalies associated with deposits instead of the value of the anomalies and identificate and evaluate anomalies with metal ogenic intensity abnormal maps.4.According to the criteria of anomaly identification and evaluation of the prospective area and the target area,12 prospecting areas are divided into the eastern Kunlun metal ogenic belt,and the 141 prospecting targets are delineated,includ ing marine volcanic type prospecting target areas 38,porphyry-skarn type prospecting target areas 44 and crushed-alteration gold type prospecting target areas 59.It provides the significant basis for the work plans for the next step prospecting of the eastern Kunlun metal ogenic belt.The method of geochemical data processing had been confirmed there are obvious advantages in highlighting weak geochemical anomaly through anomaly inspection.