福建平和—安溪中生代火山—侵入杂岩区银铅锌、锡、金成矿地质特征和找矿前景

GEOLOGICAL CHARACTERISTIS OF MINEROGENESIS AND PROSPECTING OF SILVER—LEAD—ZINC, TIN AND GOLD IN MESOZOIC VOLCANIC INTRUSIVE COMPLEX REGION, PINGHE—ANXI AREA, FUJIAN PROVINCE

平和—安溪地区火山—侵入杂岩广布,银铅锌、锡、金矿化普遍,矿点众多,尤其以银铅锌矿点居多。本文将银铅锌矿分为岩浆热液型、火山—次火山热液型、沉积—岩浆热液叠加改造型和火山喷发—沉积改造型等四种成因类型;锡矿分为岩浆热液型、火山—次火山热液型和沉积—岩浆热液改造型三种类型;金矿分为岩浆热液型和火山—次火山热液型两种类型。在总结各矿种的不同成因类型的地质特征和控矿条件的基础上,对本区找矿前景作了分析,认为银铅锌矿找矿前景最佳,是主攻矿种。同时也对其它矿种提出一些主攻地带和靶区。

Volcanic-intrusive complex are widely dispersed over the Pinghe—Anxi area. Mineralizations of silver—lead—zinc, tin and gold are widespread. There are a lot of mineral occurences, especially silver—lead—zinc. According to this paper, silver—lead—zinc deposits are classified as four types, magmatic hydrothermal type, volcanic—subvolcanic hydrothermal type, sedimentary—magmatic hydrothermal superimposition reformation type and volcanic eruption—reformation type. Tin deposits are classified as three types, magmatic hydrothermal type, volcanic—subvolcanic hydrothermal type and sedimentary—magmtic hydrothermal reformation type, Gold deposits are classified as two types, magmatic hy drothermal type and volcanic—subvolcanic hydrothermal type. On the basis of analysing of the geological characteristics and ore control factors of different genetic types of deposits, the authors consider that silver—lead—zinc deposits have the most charming future in prospecting and are major objectives to work. This paper puts forward some prospecting areas and targets.