以下为句子列表：
英文: 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.
中文: 通过查明矿床的容矿构造特征以及构造期次与成矿的关系，对寻找新的铌钽伟晶岩矿床具有重要的实践意义。
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英文: The pegmatite Nb-Ta mineral veins were controlled by a group of horizontal tenso-shear axial-direction fault-fissure systems in the NNE direction folding structures.
中文: 铌钽伟晶岩矿脉受控于NNE向褶皱构造的一组近水平张扭性轴向裂隙系。
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