摘要
归来庄金矿，Ａｕ是唯一达到工业品位的组分。属贫硫氧化型金矿。矿石矿物近５０种之多，其中金属矿物以褐铁矿为主。金矿物有自然金、银金矿、碲铜金矿、碲金银矿，并含银矿物和极少的碲化物。金矿物粒径多＜０．０１ｍｍ，属细粒—微粒型金矿，其嵌连关系以粒间金为主。蚀变作用为气—热蚀变和褐铁矿化。矿床系多期多阶段矿化作用形成。为中温热液矿床。隐爆角砾岩为导矿构造，而热液侵入角砾岩是容矿构造。
Guilaizhuang gold deposit belougs to the sulphurpoor oxidation type one in which gold is theoniy component to have reached the economic(industrial)grade. There are nearly fifty kinds ofminerais in The ore among which limonite is the predominant metallic mineral while native gold,electrum,koslovite and petzite are gold-bearing minerals In addition,there are silver-mineralsand trace amount of tellurides. Grain size of the gold minerals is commonly less than 0. 01 mm;therefore,the gold deposit belongs to the fine-minute particle type one. The gold minerals occurmainly as intergranular fillings (particles).Wallrock alterations include pneumatolitic-hydrothermal alterations and limonitization.Thegold deposit is the mesothermal one which havebeen formed in multiphase-multistage mineralization. The cryptoexplosive breccia sevves as theore-fluid channelling structure while the(hydrothermal)intrusive breccia is the host rock of thegold ores.
出处
《山东地质》
1995年第1期30-40,共11页
Geology of Shandong
