辉绿斑岩的英文怎么说
辉绿斑岩的英文: n. 辉绿岩 porphyry是什么意思: n. 斑岩 The copper is disseminated in small joint surfaces and cracks in the porphyries A dark igneous porphyry embedded with feldspar crystals. A fine - grained granite porphyry having a groundmass with irregular intergrowths of quartz and feldspar. Their massive vaults, carried at both levels by monolithic columns of green and white marble and purple porphyry, serve as buttresses to receive the thrust of the great dome and its supporting arches. |