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一、珍珠岩矿床的地质特征几个矿床实例。 1、吉林省九台县三台珍珠岩矿床矿区位于新华夏系第二沉降带与第二隆起带接触部位,即位于松辽盆地东部边缘、四楞山背斜东侧。矿区出露地层为中生代上侏罗统沙河子组砂岩、页岩及下白垩统营城组酸性火山岩。露头不好,广为第四系所覆盖,仅在矿床顶部及冲沟中有基岩出露。珍珠岩主要分布在下白垩统(K_1)营城组火山岩中。珍珠岩呈深绿色、绿色、浅绿色、
First, the geological characteristics of perlite deposits Several deposit examples. 1. The three perlite deposits in Jiutai County, Jilin Province, are located at the contact point between the second subsidence zone of the Neo-Huaxia System and the second uplift zone, which is located on the eastern margin of the Songliao Basin and east of the Scull Leng anticline. The outcropped strata of the mine area are Mesozoic Jurassic Shahezi sandstone, shale and the Lower Cretaceous Yingcheng Formation acidic volcanic rocks. Outcrop is poor, widely Quaternary coverage, only in the top of the deposit and gutter bedrock exposed. Perlite is mainly distributed in the volcanic rocks of Yingcheng Formation of Lower Cretaceous (K_1). Perlite was dark green, green, light green,