The Geochemical Exploration Model Of Jiama Polymetallic Copper Deposit

Jiama polymetallic copper deposit is a example of achieving major breakthrough in short team through a combination of scientific prospecting and mode prospecting in Gangdese metallogenic belt, which is closely related to the guidance of metallogenic series to prospecting practice.The understanding of deposit genesis has experienced tremendous change from the Sedex to porphyry-skarn mineralization system, which is the key to successful exploration of Jiama.In order to explore the element mineralization in the the periphery of Jiama mine and81ranch within exploration rights and in the support of "Geochemical soil and rock survey in the the periphery of Jiama deposit "of Tibet Huatailong Mining Development Co., Ltd,China National Gold Group, through systematic field sampling, geological mapping, drilling catalog and analyzing the content of the related elements in the rock, the thesis studies element geochemistry anomalies of Jiama copper polymetallic deposit, explains the formation mechanism of geochemical anomalies combining with deposit genesis,establishes geochemical exploration model of Jiama copper polymetallic ore and applies the model in the preference of ore prospect area. Through research, the main results obtained are as follows:(1) The single-element geochemical anomalies of34kinds of elements including Cu, Mo, Pb, Zn, W, Sn, Ag, As, Sb, Bi, S, Li, Ni, Co, Sr, V, Ba, Be, Cr, Ga, Nb,Y, Cd, Ce, Cs, Ge, In, La, Ta, Te, Th, Tl, U in Jiama mine and81ranch are summarized.(2) Through cluster analysis, elements of Jiama peripheral are divided into five groups:As-Sb、Zn、Pb-W-Bi-Te-Ag-Se、Cu-S、Mo,which of81ranch are divided into four groups:Zn-Cd-In、S-Se、Mo、Cu-Bi-Ag-Te. R-type factor analysis shows Jiama peripheral element association related to main mineralization are factors F4(S,Cu,Mo),which are factors F7(Li,Zn,S,Cu), F8(-Mo,Sb,As)in81ranch.(3) By analyzing profile and surface rock measuring element distribution of Jiama and81ranch, this thesis explores respective element enrichment and depletion characteristic and establishes geochemical exploration model of Jiama copper polymetallic ore,finally delimits three potential prospecting areas:A-type Mogulang prospective area、B-type Zhisuolang prospective area and C-type Xiangbeishan South prospective area.