MANY geologists pay attention to Mesozoic tectonomagmatic activity and the associating multi-metal ore deposits in South China. However, the age of the transformatiori of tectonic regimein the area is little studied. ...MANY geologists pay attention to Mesozoic tectonomagmatic activity and the associating multi-metal ore deposits in South China. However, the age of the transformatiori of tectonic regimein the area is little studied. Occurrence of gabbro xenoliths in Mesozoic alkaline basalts inDaoxian region, Hunan Province, shows that the lithosphere in the region was intensely ex-tended and thinned during the Mesozoic, followed by underplating of mantle-derived mag-展开更多
Petrological and mineralogical characteristics of gabbro xenoliths in Mesozoic basalts in Ningyuan-Daoxian region, Huan province show that they belong to different rock series. The basalt is similar to alkline basalt ...Petrological and mineralogical characteristics of gabbro xenoliths in Mesozoic basalts in Ningyuan-Daoxian region, Huan province show that they belong to different rock series. The basalt is similar to alkline basalt of an intracontinental rift ; while the gabbro xenolith shows that it is the differentiated outcrop of tholeiitic lava, similar to that of layer-shaped basic pluton. The gabbro xenolith represents an early intrusion of basic melt and the melting event is probably the earlier menifestation of lithosphere mibilization in Mesozoic in the South China.展开更多
文摘MANY geologists pay attention to Mesozoic tectonomagmatic activity and the associating multi-metal ore deposits in South China. However, the age of the transformatiori of tectonic regimein the area is little studied. Occurrence of gabbro xenoliths in Mesozoic alkaline basalts inDaoxian region, Hunan Province, shows that the lithosphere in the region was intensely ex-tended and thinned during the Mesozoic, followed by underplating of mantle-derived mag-
文摘Petrological and mineralogical characteristics of gabbro xenoliths in Mesozoic basalts in Ningyuan-Daoxian region, Huan province show that they belong to different rock series. The basalt is similar to alkline basalt of an intracontinental rift ; while the gabbro xenolith shows that it is the differentiated outcrop of tholeiitic lava, similar to that of layer-shaped basic pluton. The gabbro xenolith represents an early intrusion of basic melt and the melting event is probably the earlier menifestation of lithosphere mibilization in Mesozoic in the South China.