This precious mineral is found as crystals within metamorphic rock.
我们可以在变质岩中发现这种珍贵矿物的结晶体。
The types of veins increase, the mineral components get more complicated and higher temperature hydrothermal minerals evolve as the anthracite metamorphic ranks, whenever they are, get higher.
无论什么时代的无烟煤，随着其变质程度升高，煤中脉体种类增多，矿物成分变得复杂，较高温热水矿物出现。
A weakly magnetic black mineral found in metamorphic and plutonic rocks; an iron titanium oxide in crystalline form; a source of titanium.
一种具有弱磁性的黑色矿物，见于变质岩和火成岩中，晶体状铁钛氧化物，是钛的来源。
The types of veins increase, the mineral components get more complicated and higher temperature hydrothermal minerals evolve as the anthracite metamorphic ranks, whenever they are,...
无论什么时代的无烟煤，随着其变质程度升高，煤中脉体种类增多，矿物成分变得复杂，较高温热水矿物出现。
A mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium.
一种含有二氧化钛的矿物，呈晶体状，见于变质岩和火成岩中，是钛的主要来源。
Table The types metamorphic faces and mineral assemblages of metamorphic rocks from...
表缅甸硬玉岩区的变质岩类型、矿物共生组合及变质相的划分。
The study of the metamorphic core complex has important significance for the understanding of the crustal evolution and mineral exploration in southeastern Yunnan.
对该变质核杂岩的研究，将对滇东南地区的地壳演化认识及矿田勘查有重要意义。
The characteristics of the gold mineral are similar to those deposits in the metamorphic rocks of Archean greenstone belt in the eastern China.
上述特点与我国东部地区产于太古宙变质岩(绿岩带)中的金矿床具有可对比性，也与矿床成因研究的认识相吻合。
The characteristics of the gold mineral are similar to those deposits in the metamorphic rocks of Archean greenstone belt in the eastern China.
上述特点与我国东部地区产于太古宙变质岩(绿岩带)中的金矿床具有可对比性，也与矿床成因研究的认识相吻合。
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