Rushan Gold Deposit Prospecting Direction

On the base of formers' and myself research on Rushan .comprehensive study has been made on the geology, geophysics. geochemistry and remote sense of gold deposits in rushan.Through the study on geological information that controls the deposits we can see that the Jingshan Group metamorphic green formation is the source bed of the gold mineralization in this region for it contains the same 6 .34S as auriferous quartz vein and high Au abundance,Kunyushan grante and Jingshan group are transitional and the survivals of Jingshan that remained in Kunynshan have the same attitude.this reveals that Kunyushan grante is crustal Anatexite of paleoproterozoic Jingshan group in the process it plays the media and accelerant role to the deposit formation:it can produce fluid abundant in alkali while forming.this fluid can resolve the ore-forming elements such as Au contained in Jingshan group into ore-foring fluid.so the base of gold-deposits was built.The ore-forming fluid along with the grante magma move upward and heat meteoric water.they mixed and circulate to resolve the ore-forming elements in adjacent rocks.when these fluids were brought into a good zone,the elements such as Au can laydown.The analysis of lamprophyres'petrology chemistry reveals that it is a series of high potassium- potassium dike rock,it is abandunt in alkali(K2O,Na2O)and has a large reducing capacity.The diagrams of the major-element variation shows that the geochemical compositions-variations of the major oxides have vague general rules of homologous magmatic fractional-crystallization.the pearce diagram of trace elements shows it intensively enriched in LILE(such as BaRbSr),intensively depleted in coherence elements(such as CrNi.et al).LREE enriched compared to HREE.the diagrams of Cr-Ce/Sr and Ce/Yb-Ta/Yb all show a enriched mantle bed.All of the geochemical patterns of lamprophres show that it is closely related to gold-mineralization.The study on controlling structures reveals that the allocation of orebodies is characterized by NNE-trending belt and NE-trending row.the location of orebodies is controlled by NNE-trending and NEE-trending faults company.The patterns of geophsics indicates that the gold deposits are distributed in the steps belts of gravity abnormality and the bondary of aeromagneticanomaly.Auriferous quartz vein is hiher electrical resistivity and chargeability.The research on geochemistry shows that the gold deposits have the combination of elements(Au. Ag. Cu. P. Zn. As. Sb Bi,et al),the guide elements of front halo of ore-body is Hg, As, Sb.rear halo elements is Bi, Mo.The analysis on RS indicates that the best region of mineralization is NNE trending lines structures overlapping annular structures.the intercase of NNE and NE trending lines structures and EW trending line structures.On the base of comprehensive research on ore-forming information of geology , geophysics , geochemistry and RS of gold deposits in rushan.by means of the relation of ore-forming information and gold deposits,the marks of comprehensive deposits fingings was put forward.the model for comprehensive deposits was built and the direction to find gold deposits in rushan was pointed out.