The crust and upper mantle structure beneath southeastern China

The deep structure study was carried out beneath Fujian and Taiwan provinces of China by the group of Yinshuang Ai at the Institute of Geology and Geophysics. The study brought together data from 44 seismic stations around Fujian province and Taiwan and used seismic stacking method of receiver functions. The results demonstrated that the crustal thickness in Fujian decreased from inland to offshore while the Poisson ratio increased, possibly indicating a decrease in silicon oxide content and an increase in igneous rocks. The stacking results also showed a possible western dipping slab in central and northern Taiwan down to a depth of 50 kilometres, which implied that the Philippine Sea plate is probably subducting beneath the Eurasian continent plate near this region. These results have an important scientific indication for understanding the interaction of plates and the dynamics of deep interior beneath study region. This research was published on the journal 《Earth and Planetary Science Letters》 and was selected a research highlight in Nature China website.

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