大同黑砂石

• 作 者: 赵晓晨
• 出 处: 地球
• 发表日期: 1990年05期
• 关键词: 大同煤田 石炭二叠纪 矿物组分 紫灰色 水云母 耐火粘土 太原组 张裂 标志层 层位

大同煤田石炭二叠纪煤系地层中,有一种与砂岩形貌酷似的黑灰色岩石,风化后为紫灰色,水浸泡后不吸水、不膨胀、不松散。当地人把那些粗粒结构的称为“黑砂石”;把那些细粒结构的称为“黄瓜石”。该岩石的矿物组分,90%以上是高岭石,含极少的石英和水云母、金红石、褐铁矿等,是一种具良好工艺性能的陶瓷及耐火粘土原料。

Datong Coalfield Carboniferous Permian coal-bearing strata, there is a sandstone with a morphology similar to the dark gray rock, after weathered purple, water soaked does not absorb water, do not swell, not loose. The locals refer to those coarse-grained structures as “black sandstone”; those with fine-grained structures are called “cucumber stones.” More than 90% of the mineral components of the rock are kaolinite, with very few quartz and mica, rutile, limonite, etc., which is a kind of ceramic and refractory clay material with good process performance.