Global ETD Search
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Showing 1 to 6 of 6 for “"North China Craton"”.
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Two phases of extension in North China since Mesozoic :
The North China Craton was formed around 1.8 Ga by collision and amalgamation of the Eastern and Western blocks. It remained tectonically stable since then until the Mesozoic, when its eastern part experienced widely distributed extension and volcanism. This distributed extension waned during the …
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Imaging of crust and mantle structures with teleseismic reflected waves
… Application of VDSS to data from the North China craton reveals significant lateral variations in crustal thickness. Assuming that the crust was originally uniform, the thick crust beneath the Ordos plateau supports the hypothesis of lower crustal foundering as the mechanism of …
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Receiver function study in northeast Tibet and adjacent boundaries
As part of the NorthEast Tibetan plateau Seismic (NETS) project, we performed receiver functions analysis across the northeastern Tibetan plateau and adjacent boundaries. Using the data of about 500 events obtained from 61 broad-band stations, we provided a detailed image of the Moho geometry and …
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Archean detrital zircons in the Proterozoic Vishnu Schist of the Grand Canyon, Arizona : implications for crustal architecture and Nuna reconstructions
… with compilations of zircon ages from other cratons does not support provenances in the Wyoming, South China, or Siberian cratons; instead sources may be located in Gawler craton of Australia, North China craton, or Antarctica. If the detrital zircons were far-traveled, this is a new …
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Seismic study of the crust and upper mantle structure in eastern Asia using ambient noise correlation and earthquake data
… crust and upper mantle shear wave velocity in China and its surrounding region is obtained from regional surface wave tomography. By combining traditional earthquake surface wave data with ambient noise correlation data, I am able to extend the Rayleigh wave group velocity period from 8 s to …
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Geochemical investigation of the co-evolution of life and environment in the Neoproterozoic Era
… (ca. 1000 Ma to ca. 800 Ma) Huaibei Group in North China were measured. The data indicate nitrate limitation in early Neoproterozoic oceans. Further, a compilation of Proterozoic sedimentary δ<sup>15</sup>N data, together with box model simulations, suggest a ~50% increase in marine nitrate …