并证实其原岩是与本区未变质的火山岩类相同的一套细碧-石英角斑岩系。
We con-firm that the original rocks are identical with the volcanic rocks in this area.
未变形未变质的前寒武纪岩墙群的存在表明前寒武纪华北克拉通已经具有了刚性板块的性质。
The existence of the undeformed and unmetamorphed Precambrian dike swarms shows that the Precambrian North China Craton had been a rigid plate.
系统地分析了未变质煤的 X 射线衍射图。
The X-ray diffraction patterns of unmetamorphosed coals have been systematically analyzed.
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