siliceous rocks

基本解释

The genesis of siliceous rocks in the Changkeng gold-silver deposit, Guangdong Province;
江武義金（銀）-螢石鑛牀，屬燕山晚—末期成鑛作用的産物。
Gold mineralization of the zone is confined only to the Cambrian carbonaceous shale overlain by siliceous rocks, and apparently controlled by a premineral tough shear zone.
該“潛伏”脈帶的金鑛化限於寒武系以矽質巖爲頂板的碳質頁巖中，明顯受成鑛前産生的靭性剪切帶控制。
The siliceous rocks of the lower Mantou formation were resulted from the biochemical action during the sedimentary period and formed in the environment of low-tide shallow sea.
結果表明，鏝頭組下部的矽質層是同生期生物化學作用成因的，形成於潮下低能淺水環境；