The basalt is altered and olivine basalt. Plagioclase is mostly of labradorite and andesine, pyroxene mostly of augite, and olivine mostly replaced by iddingsite in rock-forming mineral.

  • 玄武岩为蚀变玄武岩、橄榄玄武岩等,造岩矿物斜长石的成分多为拉长石和中长石,辉石多为普通辉石,橄榄石多已伊丁石化。

  • 互联网摘选 2025-01-19 23:33:56

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