燧石岩是一种常见的硅质岩,主要由微晶石英和玉髓组成,常混有粘土矿物、盐酸盐矿物和有机质等。燧石岩以灰、黑等暗色为常见,也可见呈灰绿、黄、红、白等色,是一种致密坚硬,常具有贝壳状断口的隐晶质岩石。 按其产状,燧石岩分为层状和结核状两种。 层状燧石岩呈薄层状,有时则呈规则条带或大透镜体。 结核状燧石岩(燧石结核)常产于碳酸盐岩中,往往沿一定层位分布
... metamorphic rock meta 变质岩 novaculite novac 燧石岩 orthoquartzite QTZ,Q 正石英岩 ...
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渭北奥陶系的放射虫燧石岩是在稳定的华北地台上形成的远洋沉积。
The radiolarian cherts in the Wenbei region of Shaanxi Province are a formation of pelagic sediments formed within the North China Platform.
矽质岩包括燧石和沈积石英岩,呈薄层状产出,沈积石英岩具鲕状、砾状结构。
The thin-beded siliceous -rocks include chert and depositional quartz with textures of oolite and pebble.
本文介绍了天然金刚石、天然刚玉、石榴石、石英、燧石、浮岩、硅藻土、赤铁矿、珍珠岩等天然磨料的性能特点和其应用。
This paper discusses the performance and application of natural abrasive such as diamond, corundum, garnet, quartz, flint, pumice, diatomite, hematite and perlite.
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