One hundred and fifty-six xenoliths were collected from N(?)shan, 35 km north of Mingguang Town, Anhui Province, East China. All these xenoliths are derived from the crest and occur in basanite pyroclastics. Some of t...One hundred and fifty-six xenoliths were collected from N(?)shan, 35 km north of Mingguang Town, Anhui Province, East China. All these xenoliths are derived from the crest and occur in basanite pyroclastics. Some of them are determined to be granulites, In展开更多
Using secondary spinel standard method, we have measured precisely the compositions of spinels of amphibole-bearing mantle peridotite xenoliths from Nüshan in eastern China, and calculated the mantle oxygen fugac...Using secondary spinel standard method, we have measured precisely the compositions of spinels of amphibole-bearing mantle peridotite xenoliths from Nüshan in eastern China, and calculated the mantle oxygen fugacities recorded by the xenoliths. Results indicate that the mantle metasomatism for forming amphiboles in Nüshan region of Anhui has resulted in the decrease of mantle redox, which is in contrast with theoretical estimation and previous research results from other areas around the world. Combining with related studies on the mantle of eastern China, we give a reasonable explanation to the 'new finding' and further elucidate the compositions and nature of mantle fluids in eastern China.展开更多
文摘One hundred and fifty-six xenoliths were collected from N(?)shan, 35 km north of Mingguang Town, Anhui Province, East China. All these xenoliths are derived from the crest and occur in basanite pyroclastics. Some of them are determined to be granulites, In
基金This work was supported by the National Natural Science Foundation of China (Granl No.49673185). the Ministry of Science and Technology of China (Grant No. 95-Pre-39) the Key Laboratory of the Department of Earth Sciences, Nanjing University. T
文摘Using secondary spinel standard method, we have measured precisely the compositions of spinels of amphibole-bearing mantle peridotite xenoliths from Nüshan in eastern China, and calculated the mantle oxygen fugacities recorded by the xenoliths. Results indicate that the mantle metasomatism for forming amphiboles in Nüshan region of Anhui has resulted in the decrease of mantle redox, which is in contrast with theoretical estimation and previous research results from other areas around the world. Combining with related studies on the mantle of eastern China, we give a reasonable explanation to the 'new finding' and further elucidate the compositions and nature of mantle fluids in eastern China.
