Abstract
A natural {211}-type zircon has been first discovered in the **tan gabbro in the Fujian Province, which is a new type of morphology reported in magmatic zircons. Investigation of morphology and trace-element chemistry shows two distinct growth stages, Stage 1 and Stage 2. The {211}-type zircon is the earliest crystallized phase of Stage 1 zircon. The low Hf contents and extreme depletion in U, Th and Y indicate that Stage 1 zircon was approximately in equilibration with melt during the crystallization, so that they are regarded as crystallized phase in deeper magmatic chamber. The Zr-saturated gabbroic magma is demonstrated to be derived from mantle magmas by differentiation. The magma differentiation and zircon crystallization at the lower crust level indicate the existence of underplating of mantle magma beneath this area, which results in strong magmatic activities in the late Mesozoic.
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References
Gupta, L. N., Unusually large zircons, Mineral. Mag., London, 1973, 39: 253.
Pupin, J. P., Zircon and granite petrology, Contrib. Mineral. Petrol., 1980, 73: 207.
Kostov, I., Zircon morphology as a crystallogenetic indicator, Kristall und Technik, 1973, 8: 11.
Vavra, G., On the kinematics of zircon growth and its petrogenetic significance: a cathodoluminescence study, Contrib. Mineral. Petrol., 1990, 106: 90.
Dong, C. W., Zhou, X. M., Li, H. M., Late Mesozoic crust/mantle interaction in southeastern Fujian: isotopic evidence from the **tan igneous complex, Chinese Sci. Bull., 1997, 42: 495.
Wang, X., A new method of quantitative research for zircon morphology, Mineralogy and Petrology, 2001.
Shannon, R. D., Revised effective ionic radii and systematic studies of interatomic distances in halide and chalcogenides, Acta Crystallogr., 1976, A32: 751.
Ahrens, L. H., Erlank, A. J., Hafnium, sections B-O. In: Handbook of Geochemistry (ed. Wedepohl, K. H.), New York: Springer-Verlag, 1969, II/5.
Mahood, G., Hildreth, W., Large partition coefficient for trace elements in high-silica rhyolites, Geochim. Cosmochim. Acta, 1983, 47: 11.
Wang, X., Kienast, J. R., Morphology and geochemistry of zircon: a case study on zircon from the microgranitoid enclaves, Science in China, Series D, 1999, 42: 544.
Carpena, J., Gagnol, I., Mailhe, D. et al., L’uranium marqueur de la croissance cristalline: mise en évidence par les traces de fission dans les zircons gemmes d’Espaly (Haute-Loire, France), Bull. Minéral, 1987, 110: 459.
Benisek, A., Finger, F., Factors controlling the development of prism faces in granite zircons: a microprobe study, Contrib. Mineral. Petrol., 1993, 114: 441.
Wang, X., Zhou, D. S., A new equilibrium form of zircon crystal, Science in China, Series B, 2001, 44(5): 516.
Poldervaart, A. Zircons in rocks. 2. Igneous rocks, Am. J. Sci., 1956, 254: 521.
Konzett, J., Armstrong, R. A., Sweeney, R. J. et al., The timing of MARID metasomatism in the Kaapvaal mantle: An ion probe study of zircons from MARID xenoliths, Earth Planet. Sci. Letters, 1998, 160: 133.
Freundt, A., Schmincke, H. U. S., Petrogenesis of rhyolitetrachyte-basalt composite ignimbrite P1, Gran Canaria, J. Geophys. Res., 1995, 100: 455.
Streck, M. J., Grunder, A. L., Enrichment of basalt and mixing of dacite in the rootzone of a large rhyolite chamber: inclusions and pumices from the Rattlesnake Tuff, Oregon, Contrib-Mineral. Petrol., 1999, 136: 193.
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Wang, X., Li, W. Typomorphism of the {211}-type zircon. Chin.Sci.Bull. 47, 154–158 (2002). https://doi.org/10.1360/02tb9036
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DOI: https://doi.org/10.1360/02tb9036