Abstract
Zircon U/Pb ages were measured for Qianshan gneiss at the ultrahigh pressure metamorphic (UHPM) complex in the Southern Dabie Terrain (SDT). According to morphology, Th and U contents of eight fractions of zircon and data distribution on the discordia, it is indicated that they should be treated as metamorphic overgrowth mixing zircons, in which the cores mainly are magmatic and the outers were metamorphic. The intercept ages show that the gneiss underwent UHPM. There is no direct correlation for zircon between morphological feature and genesis.
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References
Liu, R., Fan, Q., Li, H. et al., Prololith characteristics of garnet peridotile-eclogite from Bixiling Dabieshan and their geochronological implication, Petrologica Sinica (in Chinese with English abstract), 1995, 11(3): 243.
Li, S., Li, H., Chen, Y. et al., Metamorphic geochronology of Dabieshan-Sulu UHP Terrain —II. U/Pb isotopic system of zircon, Science in China, Ser. D, 1997, 27(3): 200.
Ames, L., Zhou, G. Z., Xiong, B. C., Geochronoiogy and isotopic character of ultrahigh-pressure metamorphism with implications for collision of the Sino-Korean and Yangtze cratons, Central China, Tectonics, 1996, 15(2): 472.
Rowley, D. B., Xue, F., Tucker, R. D. et al., Ages of ultrahigh pressure metamorphism and protolith orthogneisses from the eastern Dabie Shan: U/Pb zircon geochronology. Earth Planet. Sci. Lett., 1997, 151: 191.
Xue, F., Rowley, D. B., Turker, R. D. et al., U-Pb Ages of Granitoid Rocks in the North Dabie Complex, Eastern Dabieshan, China, J. Geol., 1997, 105: 744.
Hacker, B. R., Ratshbacher, L., Webb, L. et al., U/Pb zircon ages constrain the architecture of the ultrahigh-pressure Qinling-Dabie Orogen, China, Earth Planet. Sci. Leu., 1998, 161: 215.
Xie, Z., Chen, J., Zhou, T. et al., U-Pb zircon ages of the rocks in Northern Dabie terrain, China, Scientia Geologica Sinica, 1998, 7(4): 501.
Parrish, R. P., An improved micro-capsule for zircon dissolution in U-Pb geochronology, Isotope Geoscience,1987, 66: 99.
Wetherill, G. W., An interpretation of Rhodesia and Witwatersrand age patterns, Geochim Cosmochim Acta, 1956, 9: 290.
Gebauer, D., Schertl, H. P., Brix, M. et al., 35 Ma old ultrahigh-pressure metamorphism and evidence for very rapid exhumation in the Dora Maira Massif, Wester Alps, Lithos., 1997, 41: 5.
Gebauer, D., A P-T-t Path for an (Ultra?-) High-Pressure Ultramafic/Mafic Rock-Association and its Felsic Country-Rocks Based on SHRIMP-Dating of Magmatic and Metamorphic Zircon Domains, Example: Alpe Arami (Central Swiss Alps), 1996, in Earth Processes: Reading the Isotopic Code, Geophysical Monograph 95, 307–329.
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Chen, D., Isachsen, C., Zhi, X. et al. Zircon U/Pb ages for gniess from Qianshan, Anhui. Chin.Sci.Bull. 45, 764–767 (2000). https://doi.org/10.1007/BF02886187
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DOI: https://doi.org/10.1007/BF02886187