宜章界牌岭锡多金属矿床地球化学异常模式

界牌岭锡多金属矿床是一个与浅源重熔花岗岩有关的热液多金属隐伏矿床。研究表明：矿床自上至下具有Ｆ－Ｂｅ－Ｐｂ、Ｚｎ－Ｐｂ－Ｓｎ、Ｃｕ－Ｎｂ、Ｔａ、ＴＲ的矿化分带和细脉状－层状（似层状）－面状的矿体形态分带，成晕具有Ｈｇ、Ｂ、Ｂａ、Ｃｒ、Ａｓ离心半环状晕－Ｆ、Ｂｅ、Ｌｉ、Ｐｂ、Ａｇ同心环状上偏心晕－Ｓｎ、Ｃｕ、Ｚｎ、同心环状下偏心晕－Ｎｂ、Ｇａ离心卫星晕的分布规律。据此，建立了本矿床“三环－帽壳式”地球化学异常模式。经模式识别，总结了不同剥蚀程度矿床（浅，中，深）异常评价的地质－地球化学指标。

CEOCHEMICAL ABNORMAL MODEL OF JIANGPAILING Sn MULTIMETAL DEPOSIT AT YIZHANG

Jiangpailing Sn multimetal deposit is a hydrothermal blind deposit which has the connection with the hypabyssal remelting granite.Study shows:from upper to lower,the mineralization zoning presents F-Be-Pb,Zn-Pb-Sn,Cu-Nb,Ta,TR,orebody form zoing presents veinlet stratiform(stratoid),the distribution law presents the centrifugal semicircle blom of Hg,B,Ba,Cr,As-upper dviation centric circle bloom of F,Be,Li,Pb,Ag-lower deviation concentric circle bloom of Sn,Cu,Zn-Centrifugal satellite bloom of Nb,Ga.Basing on these,geochemical abnormal model of three circles and one capcrust is established in this deposit.After modle distinguishing,geoloical geochemical target of deposit abnormal appraising in the difference degradation grade(upper,middle,lower)is summarized.