tectonic epochs 中文意思是什麼
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In order to find new pegmatite nb - ta ore - deposit, it is very important practical - significances to ascertain the host structure characteristics and the relations between the tectonic epochs and ore - forming
通過查明礦床的容礦構造特徵以及構造期次與成礦的關系,對尋找新的鈮鉭偉晶巖礦床具有重要的實踐意義。
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