Oceanic lithospheric mantle beneath the continental crust of the Chinese Altai
Chao Yuan
Min Sun
Yigang Xu
Guochun Zhao
Wenjiao Xiao
Xiaoping Long
Jiyuan Yin
10.6084/m9.figshare.3452849
https://geolsoc.figshare.com/articles/dataset/Oceanic_lithospheric_mantle_beneath_the_continental_crust_of_the_Chinese_Altai/3452849
<p>Although subduction–accretion is proposed as a major regime in making new continental crust, how the lithospheric mantle forms
remains unclear. Formed after the closure of the Palaeo-Asian Ocean, the Ashele basalt shows normal mid-ocean ridge basalt
(N-MORB)-like characteristics with light REE-depleted patterns and extremely low contents of high field strength elements.
The low Zr/Y and Nb/Y ratios of the basalt are significantly different from those of asthenosphere-derived melts, and the
excess Eu and Sr suggest that the basalt was probably derived from accreted oceanic lithospheric mantle. The presence of the
N-MORB-like terrestrial basalt implies that subduction–accretion is an effective mechanism in building the refractory lithospheric
mantle of Phanerozoic continents.
</p>
2016-06-21 10:21:50
lithospheric mantle
lithospheric mantle forms
crust
Chinese Altai
field strength elements
Ashele basalt
Phanerozoic continents
Oceanic lithospheric mantle
subduction
oceanic lithospheric mantle
Geology