吉林省长春市九台区二道珍珠岩矿成矿规律及找矿潜力探讨

Discussion on metallogenic regularity and prospecting potential of Erdao perlite deposit in Jiutai District, Changchun City of Jilin Province

本文通过对矿床地质特征的总结,探讨了二道珍珠岩矿床成矿规律及找矿潜力。矿床系晚白垩世酸性岩浆大量释放挥发组分,经温度、压力突降后岩浆固结形成,矿体赋存于上侏罗统沙河子组顶部凝灰质砂岩与上白垩统营城组酸性火山岩底部流纹岩接触面上,矿床成因类型为陆相火山岩型。矿区中南部—南西端仍有较大的找矿潜力。

Based on the summary of the geological features of the deposit, the metallogenic regularity and prospecting potential of Erdao perlite deposit are discussed. The deposit is formed in Late Cretaceous, acidic magma releasing a large amount of volatile components, and the magma consolidation after the sudden drop of temperature and pressure. The ore bodies occur on the contact surface between tuffaceous sandstone at the top of Upper Jurassic Shahezi Formation and rhyolite at the bottom of acidic volcanic rock of Upper Cretaceous Yingcheng Formation. The genetic type of the deposit is continental volcanic rock type. There is still great prospecting potential in the south-central and southwestern part of the mining area.