Study On Multiple Attributes Geochemical Abnormal In Wulonggou Gold Deposit,Qinghai Province

As an important exploration area of precious metal minerals in the Qaidam Basin,the study area of Wulonggou gold deposit lies to the north of East Kunlun Mountains.The deposit is under control of fault zones,it has the typical characteristics of orogenic gold deposits.Guided by the multi-attribute geochemical anomalies,the sample collection is from the drill cores,and then summarize the enrichment and depletion laws of different elements in the total samples.we can filter the multi attribute anomaly indexes and discover the multi-attribute geochemical anomalies in Wulonggou gpld deposit.The element migration calculated by Grant mass equation is used to discuss the migrate direction of elements.By above,we can build the multi-attribute geochemical anomalies structure model and predict the direction of ore prospecting in the periphery.First of all,the China Plagiogranite and Tuffaceous slate are chosen as the background of samples which we need to discuss the enrichment and depletion laws of different elements.We screened out ten association of elements: Au?Ag?As?Sb? Na2O?Ba?Sr?S?Fe2O3 and Al2O3 as the anomaly indexes.By computing elemental migrations in the Plagiogranite and Tuffaceous slate which is related to the gold deposit,we can find that the element association of Na2 O ? Ba ? Sr are taken out,which represented the negative anomaly and the anomaly range wider than ore-forming elements Au and associated elements As?Sb.Furthermore,we also find the mineralizer element S is closely connected with the mineralization degree and further state the influence of source beds on deposit.Based on the migrate directions of elements and the anomalies of diverse mineralization degree,make sure the prospecting target.Different attributes of the anomalies formed the abnormal structure mode in Wulonggou metallogenic system.Based on the metallogenic geological environment,we construct the abnormal structure mode composed by Na2 O,Ba,Sr,negative anomaly?S mineralization agent element anomaly?Fe and Au cooperative balance system?Au and accompanying elements Ag?As?Sb positive anomaly etc.Guided by the multi-dimensional anomaly system and according to the actual test data of 14 profiles of Shuizhadonggou mine section,we try to predict the prospecting direction in the periphery of the test area.The ore elements in plagiogranite are migrating from the direction of periphery to the ore body.So we propose the prospecting direction in the periphery of the test area.Prospecting target: the plagiogranite riched in ore-forming elements(Au),mineralization associated elements(Ag,As,Sb etc.)and mineralizer element S;mineralization zones: tectonic fracture occurred in plagioclase granite zone;geochemical signs: Na2 O,Ba,Sr negative anomalies and Au,Ag,As,Sb and S positive anomalies enhancement direction.The study is from the aspect of elemental mobilities to find the performance of the elements in orogenic gold deposits and provid a case for intensive study on the metallogenic mechanism and prospecting method of this type deposit.