Sm-Nd isotopic age and genesis of gabbro xenoliths in Daoxian County, Hunan Province
Autor: | Weiming Fan, Feng Guo, Ge Lin, Yuanxian Lin |
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Rok vydání: | 1997 |
Předmět: | |
Zdroj: | Chinese Science Bulletin. 42:1814-1817 |
ISSN: | 1861-9541 1001-6538 |
Popis: | The gabbro xenoliths are inferred to form at (224 ± 524) Ma by means of Sm-Nd dating, which reflected the intrusive age or crystallization age of gabbric melts. This event indicates that the region transformed from stable platform stage into Mesozoic intensive tectonomagmatic activity stage. The dynamics originated from the upwelling of asthenosphere and lithospheric thinning. Additionally, according to eNd(T) = + 8.8 ± 0.6 of the gabbro xenoliths, within eNd variation of the MORB at 224 Ma, we know that the gabbro xenoliths are the outcrops of partial melting of the asthenosphere. |
Databáze: | OpenAIRE |
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