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The petrochemistry of the Lower Proterozoic metamorphic rocks from the Dabieshan-Lianyungang area, the southeastern margin of the North China Platform

Published online by Cambridge University Press:  05 July 2018

Sang Longkang
Sang Longkang*
Affiliation:
China University of Geosciences, Wuhan 430074, P.R. China
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Abstract

Based on geological studies, 141 rock analyses and 5 trace element analyses of metabasites, the present paper deals with the rock association, chemical features, protolith formation and the original tectonic settings upwards through the Lower Proterozoic metamorphic strata in the Dabieshan-Lianyungang area, in the south-east of the North China Platform. The results of the study indicate that the lower and middle parts of the metamorphic strata comprise terrigenous clastics, phosphoritic and aluminous sedimentary formations which formed under stable continental margin conditions. In the middle-upper part a calc-alkaline volcano-sedimentary formation under the active continental margin was developed. The Lower Proterozoic meta-strata of sedimentary-volcanosedimentary origin from bottom upwards suggest that the tectonic evolution of the south-eastern margin of the North China Platform is a process from stabilization to mobilization. This process suggests a northward subduction of the Yangtze Plate under the North China Plate during the later part of the early Proterozoic.

Keywords

metabasitespetrochemistryNorth China Platform
Type
Petrology
Information
Mineralogical Magazine , Volume 55 , Issue 379 , June 1991 , pp. 263 - 276
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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References

Bogdanov, U. B., Voinov, A. S., Efron, A. S. (1975) Some geochemical characteristics of the metamorphic strata of the Chupa-Loukhi area. In Problems of Magrnatism and Metamorphism, Vol. V (Editor-in-chief T. V. Perekalina; in Russian). Leningrad University Press, Leningrad, 31–40.Google Scholar
Boillot, G. (1981) Geology of the Continental Margins (English translation, translated by A. Scarth). London & New York, 81.Google Scholar
Cullers, R. L. and Graf, J. L. (1984) Rare earth elements in igneous rocks of the continental crust: In Rare Earth Element Geochemistry (P. Henderson, ed.) Elsevier, Amsterdam, 237-68.CrossRefGoogle Scholar
Dong, S. et al. (1986) Metamorphism in China and its Relation with the Crustal Evolution (in Chinese). Geological memoirs, Series 3, No. 4, Geological Publishing House, Beijing.Google Scholar
Pearce, J. A. (1982) Trace element characteristics of lavas from destructive plate boundaries. In Andesites (R. S., Thorpe, ed.). John Wiley & Sons, Chichester, 525-47.Google Scholar
Sang, L. and You, Z. (1988) The metamorphic pet-rology of the Susong Group and the origin of the Susong phosphorite deposits, Anhui Province. Precambrian Res., 39, 75–76.CrossRefGoogle Scholar
Sang, L., Chen, Y., and Shao, G. (1987) Characters of quartz-keratophyres formation and their Rb-Sr iso-topic ages in the southwestern part of Anhui Province (in Chinese). Acta Petrologica Sinica, 1, 56–63.Google Scholar
Suo, S., You, Z., Zhu, B., and Liu, W. (1988) Tectonic style and deformationa! sequence of Dabie metamorphic terrane (in Chinese). Earth Science-Journal of China University of Geosciences, 13(4), 341–9.Google Scholar
Tao, Q., Dong, J., Yuan, X., and Ying, J. (1986) Geochronology of Precambrian sequences in Northeastern Hubei, China (in Chinese). Bull. Tianjin Institute, Geol. Min. Res., 16, 75–89.Google Scholar
Wood, D. A. (1980) The application of a Th-Hf-Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary Volcanic Province. Earth Planet Sci. Lett., SO, 11–30.CrossRefGoogle Scholar
Xu, S., Dong, S., Zhou, H., and Chen, G. (1986) Tectonic slides and thrusts in Dabie Mountain, Anhui Province (in Chinese). Proc. Internal. Symp. on Precambrian Crustal Evolution, No. 1, Tectonic. Geological Publishing House, Beijing, 262-77.Google Scholar
Ying, J. (1988) Proterozoic activity and isotopic studies of rocks from Dabie Mountain. International Symposium on Geochemistry and Mineralization of Proterozoic Mobile Belts: Abstracts. Tianjin, 125.Google Scholar
You, Z. and Yang, S. (1986) The Petrography and geological significance of some typical metamorphic rocks in Jianou Group, Fujian (in Chinese). In Tectonic History of the Ancient Continental Margins of South China (Wang, H., Yang, W., and Liu, B., eds). China University of Geosciences Press, Wuhan, 97–112.Google Scholar