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扬子地块西缘新元古代岩浆活动非常强烈,花岗岩广布。最近研究表明,该区还有较大规模的新元古代基性岩浆活动。本文着重总结和评述了扬子地块西缘的新元古代镁铁 超镁铁质岩的最新研究成果,认为这一期岩浆活动是由约0.95～0.90Ga造山带的岩浆活动和0.86～0.74Ga非造山的岩浆活动组成,反映了从岛弧到板内裂谷的构造演化模式。
The Neoproterozoic magmatic activity in the western margin of the Yangtze block is very intense with widespread granites. Recent studies show that there is a large-scale Neoproterozoic basic magmatism in the area. This paper summarizes and comments on the latest research results of the Neoproterozoic mafic ultramafite in the western margin of the Yangtze block and argues that the magmatic activity of this period is composed of magmatism of about 0.95-0.90Ga orogenic belt and 0.86-0.74Ga Non-orogenic magmatic activity reflects the tectonic evolution from the island arc to intraplate rifts.