- Archaean (adj.)
- "of the earliest geological age," 1872, from Greek arkhaios "ancient," from arkhe "beginning" (see archon).
- 1. The Archaean and Katarchaean units are preserved mainly as relic masses.
- 太古界与远太古界主要作为残余体保存下来.
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- 2. This type of graphite deposits were formend in the Late Archaean to Early Proterozoic.
- 该类矿床的成矿时代多集中在晚太古代末至早元古代初期,并且具有全球性.
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- 3. Archaean era granulite facies metamorphite series are extensively outcropped in Sa - heqiao, Hebei province.
- 冀东迁西洒河桥是太古代麻粒岩相变质岩系广泛出露的地区.
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- 4. But simulation rock composition of the Archaean can form granite if partial melting grade is high.
- 模拟的太古代岩系岩石化学成分经高程度的部分熔融作用可以形成老湾花岗岩.
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- 5. The results indicate that the composition of post _ Archaean sedimentary rocks of NCC is not uniform.
- 结果表明,华北克拉通后太古宙沉积岩组成并不均一.
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