A black mineral that is an ore of niobium and '.
一种黑色矿物，是铌、钽矿石。
Ore prospect should be directed to PGE deposits both related to Emeishan basalt and black shale sequence.
要同时重视找寻与峨嵋山玄武岩有关和与黑色岩系有关的两类铂族矿床。
A black mineral is an ore of niobium and tantalum.
一种黑色矿物是铌、钽矿石。
The presenting of black shale series reflects abrupt environmental events, which formed many important ore hosting rock series.
黑色岩系的形成反映了环境的突变事件，构成了许多重要矿床的赋矿岩系。
The pearl ore includes the pearlite, shines black the crag and the pitchstone.
珍珠岩矿包括珍珠岩，黑曜岩和松脂岩。
It has more intensive realistic sense for analyzing the ore forming geological features of black talc and making application study on the black talc.
分析黑滑石的成矿地质特征，进行黑滑石的应用研究具有较强的现实意义。
The ore is simple in mineral composition, the main minerals including black talc, calcite, quartz, montmorillonite etc.
矿石物质组分简单，主要为黑滑石、方解石、石英、蒙脱石等。
The black-spot ore is sub-marginal economical resources and inadvisable to utilize at the present technical and economic conditions.
在现有的经济技术条件下，黑斑矿应确定为次边际经济资源，暂无开采利用价值。
The breakeven grade of tantalum for Yichun Tantalum-niobium mine is determined by the analysis of the profit and loss, and the strategy on the black-spot ore exploration is proposed.
通过盈亏平衡分析，确定宜春钽铌矿盈亏平衡品位，提出黑斑矿的处理方案。
The breakeven grade of tantalum for Yichun Tantalum-niobium mine is determined by the analysis of the profit and loss, and the strategy on the black-spot ore exploration is proposed.
通过盈亏平衡分析，确定宜春钽铌矿盈亏平衡品位，提出黑斑矿的处理方案。
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