Abstract
The lithosphere of northeastern China is composed of the Erguna, Xingan, Songnen, Jiamusi blocks and Mesozoic Wandashan accretionary complex from west to east. Nd isotope model ages indicate that the Xingan and Songnen blocks have the same Nd model ages ranging from 500 to 1 000 Ma. These are obviously younger than those of the Jiamusi block (1 500–2 000 Ma) and the Erguna block (1 500–1 700 Ma), reflecting the different evolutions of individual blocks in the early times. Geochemical tracing analysis shows that the Nd model ages of Paleozoic supercrustal rocks in the four blocks are dominantly Mesoproterozoic, while those of Mesozoic granites are mainly Neoproterozoic. It is shown that the crust ages of the region are characterized by being younger in the lower part and older in the upper part. The Os isotope analysis also indicates that the lithosphere mantle of the region is characteristic of a younger age. The P-wave velocities of the region show more complicated structures in lithosphere and asthenosphere. First of all, notably different from traditional concept of the seismic lithosphere, the low velocity zone of the lithosphere beneath the region has no persistent and continuous top interface which is highly varied in depth and intersected with the high velocity layers, forming sharp velocity discontinuities beneath major tectonic belts, even up to the Moho beneath some tectonic units. But the bottom interface of the low velocity zone is relatively persistent, occurring at a depth of 230–240 km. Another feature is that the lithosphere is characterized by an “overpass type” velocity structure vertically, in which the contoured velocity is distributed in the NE trending within the crust, in a nearly NS trending in the lithosphere mantle from a depth of 45 to 90 km, in a nearly EW trending in the upper part of the asthenosphere from 90 to 170 km and in a ring-like distribution with a diameter of about 300 km in the lower part of the asthenosphere from 170 to 240 km. The P-wave velocity is progressively increasing from 240 to 400 km.
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References
Cao X, Dang Z X, Zhang X Z, et al (1992). Jiamusi Composite Terranes. Changchun: Jilin Publishing House of Science and Technology (in Chinese with English and Russian abstracts)
Guo C L, Wu F Y, Yang J H, et al (2004). The extensional setting of the Early Cretaceous magmatism in eastern China: Example from the Yinmawanshan pluton in Southern Liaodong peninsula. Acta Petrologica Sinica, 20: 1193–1204
Huang J Q, Ren J S, Jiang C F, et al (1977). General geotectonic outline of China. Journal of Geology, 2: 117–135
Jiang Y H, Jiang S Y, Zhao K D, et al (2005). U-Pb SHRIMP dating of lamprophyre in Liaodong peninsula and the initial time of the lithosphere thinning of eastern China. Chinese Science Bulletin, 19: 2161–2168 (in Chinese)
Kang B X, Zhang H R (1990). The ophiolites and its geological significance in Raohe, Nadanhada. Geology of Heilongjiang, 1: 3–18 (in Chinese with English abstract)
Krasnyi L I, Peng Y B (1996). Geological Map of Amur Region and Adjacent Areas. Harbin: Sankt-Petersburg, Blagoveshchensk
Li Z M, Zhang P (2005). Some advances of studying on lithosphere thinning in eastern China. Xinjiang Oil and Gas, 2: 10–20 (in Chinese with English abstract)
Shao J A, Tang K D, Wang C Y, et al (1991). The Nadanhada terrane and evolution. Science in China (Ser. B), 7: 744–751 (in Chinese)
Wilde S A, Zhang X Z, Wu F Y (2000). Extension of a newly-identified 500 Ma metamorphic terrain in Northeast China: Further U-Pb SHRIMP dating of the Mashan Complex, Heilongjiang Province, China. Tectonophysics, 328: 115–130
Wu F Y, Ge W C, Sun D Y, et al (2003). Discussions on the lithospheric thinning in eastren China. Earth Science Frontiers, 10: 51–60 (in Chinese with English abstract)
Wu F Y, Wilde S A, Sun D Y (2001). Zircon SHRIMP U-Pb ages of gneissic granites in Jiamusi massif, northeastern China. Acta Petrologica Sinica, 17: 443–452 (in Chinese with English abstract)
Zhang H R (1995). Regional Geology of Heilongjiang Province. Beijing: Geological Publishing House (in Chinese with English abstract)
Zhang Q L, Mizutani S, Kojima S, et al (1989). The Nadanhada terrane in Heilongjiang Province. Geological Review, 35: 67–71 (in Chinese with English abstract)
Zhang X Z, Zhang Y H (1992). Coexistence of blueschists and greenschists: The evidence of tectonic evolution of Heilongjiang complex. Journal of Changchun College of Geology, 21: 35–40 (in Chinese with English abstract)
Zhang Y X, Sun Y S, Zhang X Z, et al (1998). Manzhouli-Suifenhe Geoscience Transect of China. Beijing: Geological Publishing House (in Chinese)
Zhou X H (2006). Major transformation of subcontinental lithosphere beneath eastern China in the Cenozoic-Mesozoic: Review and prospect. Earth Science Frontiers, 2: 50–64 (in Chinese with English abstract)
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Translated from Geology in China, 2006, 33(4): 816–823 [译自: 中国 地质]
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Zhang, X., Yang, B., Wu, F. et al. The lithosphere structure of Northeast China. Front. Earth Sci. China 1, 165–171 (2007). https://doi.org/10.1007/s11707-007-0021-6
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DOI: https://doi.org/10.1007/s11707-007-0021-6