Unraveling origin of intraplate nephelinites: insights from seismic tomography and geochemistry

This paper presents the results of an integrated seismic tomographic and geochemical investigation of Cenozoic intraplate nephelinites from Shandong Province in the eastern North China Craton to constrain origin of intraplate nephelinites. Seismic tomography images show that delaminated crust has entered the mantle transition zone (MTZ) where it interacted with the stagnant Pacific slab. The nephelinites have similar geochemical compositions to experimental melts of carbonated eclogite, and EMI basalts as well as kimberlites in trace element patterns, implying an essential role of deep carbonate melts. These data, together with their low δ26Mg and high δ66Zn values, indicate that carbonated silicate melts derived by partial melting of carbonated eclogites may have contributed to the formation of these nephelinites. Our new findings suggest that interactions between delaminated crust and the stagnant Pacific slab in the MTZ generated the intraplate nephelinitic volcanism.

@article{id3107,
  author = {Hong, Ke-Chun and Ma, Jin-Cheng and Wang, Feng and Wang, Yi-NI and Xu, Wen-Liang},
  doi = {https://doi.org/10.1016/j.jseaes.2025.106853},
  journal = {Journal of Asian Earth Sciences},
  language = {en},
  title = {Unraveling origin of intraplate nephelinites: insights from seismic tomography and geochemistry},
  url = {https://doi.org/10.1016/j.jseaes.2025.106853},
  volume = {295},
  year = {2026},
}

%O Journal Article
%A Hong, Ke-Chun
%A Ma, Jin-Cheng
%A Wang, Feng
%A Wang, Yi-NI
%A Xu, Wen-Liang
%R https://doi.org/10.1016/j.jseaes.2025.106853
%J Journal of Asian Earth Sciences
%G en
%T Unraveling origin of intraplate nephelinites: insights from seismic tomography and geochemistry
%U https://doi.org/10.1016/j.jseaes.2025.106853
%V 295
%D 2026