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Durham University

Department of Earth Sciences

Profile

Publication details for Professor Yaoling Niu

Liu, J.J., Ye, L., Niu, Yaoling, Guo, P.Y., Sun, P. & Cui, H.X. (2014). The geochemistry of late Mesozoic volcanic rocks from the North China Craton and temporal and spatial constraints on the lithosphere thinning. Geological Journal of China Universities 20(4): 491-506.

Author(s) from Durham

Abstract

The Yuanjiazhuang and Bainaobao volcanic rock suites are of late Mesozoic age located respectively in the east and west of
the Daxing'anling-Taihangshan gravity gradient zone. These volcanic rocks display similar characteristics in incompatible trace
elements and radiogenic isotopes. They are highly fractionated in rare earth elements (REE) with a high LREEs/HREEs ratio, enriched
in large ion lithophile elements (such as Rb, Ba, Th, U, K), relatively depleted in high field strength elements (HFSE: Nb, Ta, Zr, Hf,
Ti), high (
87Sr/86Sr)i and low εNd(t) and εHf(t). All these data suggest that the sources for the two volcanic rock suites are similar and their
parental melts must have derived from partial melting of ancient metasomatized mantle lithosphere. Combined with the data in the
literature, we propose that the lithospheric thinning beneath the North China Craton happened not only in the east but also to the west
of the gradient zone in the late Mesozoic.