Citation: | Yican Liu, Shuguang Li, Shutong Xu, Guanbao Chen. Retrogressive Microstructures of the Eclogites from the Northern Dabie Mountains, Central China: Evidence for Rapid Exhumation. Journal of Earth Science, 2004, 15(4): 349-354. |
The ultrahigh-pressure eclogites from the northern Dabie Mountains in central China occurred as tectonic lens or blocks within granitic gneisses or meta-peridotites. Petrologic studies suggest that the studied eclogites experienced strongly retrogressive metamorphism and produced a series of characteristic retrogressive microstructures. The retrograde structures mainly include: (1) oriented needle mineral exsolution, e.g., quartz needles in Na-clinopyroxene and rutile, clinopyroxene and apatite exsolution in garnet formed under decreasing pressure conditions during exhumation; (2) symplectite, especially, two generations of symplectites developed outside the garnet grains, which are called "double symplectite" here; (3) compositional zoning of minerals such as garnet and clinopyroxene; (4) minerals with a reaction rim or retrograde rim, e.g., omphacite with a diopside rim, diopside with an amphibole rim and rutile with a rim of ilmenite. These retrograde textures, especially mineral zoning and symplectite, provide important petrologic evidence for the exhumation process and uplift of high-grade metamorphic rocks such as eclogite in the northern Dabie Mountains, indicating a rapid exhumation process.
Carswell, D.A., Wilson, R.N., Zhai, M., 2000. Metamorphic Evolution, Mineral Chemistry and Thermobarometry of Schists and Orthogneisses Hosting Ultra-high Pressure Eclogites in the Dabieshan of Central China. Lithos, 52: 121-155 doi: 10.1016/S0024-4937(99)00088-2 |
Chavagnac, V., Jahn, B.M., 1996. Coesite-Bearing Eclogites from the Bixiling Complex, Dabie Mountains, China: SmNd Ages, Geochemical Characteristics and Tectonic Implications. Chem. Geol. , 133: 29-51 doi: 10.1016/S0009-2541(96)00068-X |
Chopin, C., 1984. Coesite and Pure Pyrope in High-Grade Blueschists of the Western Alps: A First Record and Some Consequence. Contrib. Mineral. Petrol. , 86: 107-118 doi: 10.1007/BF00381838 |
Cong, B., Zhai, M., Carswell, D.A., et al., 1995. Petrogenesis of Ultrahigh-Pressure Rocks and Their Country Rocks at Shuanghe in the Dabie MountainsCentral China. Eur. J. Mineral. , 7: 119-138 doi: 10.1127/ejm/7/1/0119 |
Cong, B., 1996. Ultrahigh-Pressure Metamorphic Rocks in the Dabieshan-Sulu Region of China. Science Press, Beijing. 1 -244 |
Dobrzhinetskaya, L.F., Eide, E.A., Larsen, R.B., et al., 1995. Microdiamond in High-Grade Metamorphic Rocks of the Western Gneiss Region, Norway. Geology, 23: 597-600 |
Duchene, S., Albarede, F., Lardeaux, J.M., 1998. Mineral Zoning and Exhumation History in the Munchberg Eclogites (Bohemia). A m. J. Sci. , 298: 30-59 |
Hacker, B. R., Wang, X., Eide, E. A., et al., 1996. Qinling-Dabie Ultrahigh-Pressure Collisional Orogen. In: Yin, A., Harrison, T.M., eds., The Tectonic Evolutions of Asia. Cambridge Univ. Press, Cambridge. 345-370 |
Li, S., Xiao, Y., Liu, D., et al., 1993. Collision of the North China and Yangtze Blocks and Formation of Coesite-Bearing Eclogites: Timing and Processes. Chem. Geol. , 109: 89-111 doi: 10.1016/0009-2541(93)90063-O |
Li, S., Jagoutz, E., Chen, Y., et al., 2000. Sm-Nd and RbSr Isotope Chronology of Ultrahigh-Pressure Metamorphic Rocks and Their Country Rocks at Shuanghe in the Dabie Mountains, Central China. Geochim. Cosmochim. Acta, 64: 1077-1093 doi: 10.1016/S0016-7037(99)00319-1 |
Li, S., Liu, Y., Xu, S., et al., 2002. Effects of RetrogradeZoning of Garnet on Sm-Nd Isotopic Dating of Eclogite and Oxygen Isotopic Disequilibrium between Eclogitic Minerals. Science in China (Series B), 45(Suppl. ): 28-37 |
Liou, J.G., Zhang, R. Y, Ernst, W.G., et al., 1999. HighPressure Minerals from Deeply Subducted Metamorphic Rocks. In: Hemley, R.J., ed., Rev iews in Mineralogy, 37: 33-96 |
Liu, Y. C., 2000. Petrology, Geochemistry and Isotopic Chronology of the Eclogites from the Northern Dabie Mountains[Dissertation]. University of Science and Technology of China, Hefei (in Chinese with English Abstract) |
Liu, Y., Li, S., Xu, S., et al., 2000. U-Pb Zircon Ages of the Eclogite and Tonalitic Gneiss from the Northern Dabie Mountains, China and Mult-i overgrowths of Metamorphic Zircons. Geological Journal of China Universities, 6: 417 -423(in Chinese with English Abstract) |
Liu, Y., Xu, S., Li, S., et al., 2001. Distribution and Metamorphic P-T Condition of the Eclogites from the Mafic-Ultramafic Belt in the Northern Part of the Dabie Mountains. Acta Geologica Sinica, 75: 385-395 (in Chinese with English Abstract) |
Liu, Y., Xu, S., Li, S., et al., 2003. Tectonic Affinity, T-t Path and Uplift Trajectory of Eclogites from Northern Dabie Mountains, Centra-l Eastern China. Journal of China University of Geosciences, 14(1): 28-33. |
Massonne, H.J., 1999. A New Occurrence of Microdiamonds in Quartzofeldspathic Rocks of the Saxonian Erzgebirge, Germany, and Their Metamorphic Evolution. Proc. 7th Intern. Kimberlite Conf., Cape Town 2, 533-539 |
Mposkos, E.D., Kostopoulos, D.K., 2001. Diamond, Former Coesite and Supersilicic Garnet in Metasedimentary Rocks from the Greek Rhodope: A New Ultrahigh-Pressure Metamorphic Province Established. Earth Planet. Sci. Lett. , 192: 497-506 doi: 10.1016/S0012-821X(01)00478-2 |
O'Brien, P.J., 1997. Garnet Zoning and Reaction Textures in Over -Printed Eclogites, Bohemian Massif, European Variscides: A Record of Their Thermal History during Exhumation. Lithos, 41: 119-133 doi: 10.1016/S0024-4937(97)82008-7 |
Okay, A.I., Xu, S., Seng9 r, A.M.C., 1989. Coesite from the Dabie Shan Eclogites, Central China. Eur. J. Mineral. , 1: 595-598 doi: 10.1127/ejm/1/4/0595 |
Okay, A.I., 1993. Petrology of a Diamond and Coesite-Bearing Metamorphic Terrain: Dabie Shan, China. Eur. J. Mineral. , 5: 659-673 doi: 10.1127/ejm/5/4/0659 |
Rolfo, F., Compagnoni, R., Xu, S., et al., 2000. First Report of Felsic Whiteschist in the Ultrahigh-Pressure Metamorphic Belt of Dabie Shan, China. Eur. J. Mineral. , 12: 883-898 doi: 10.1127/0935-1221/2000/0012-0883 |
Sobolev, N.V., Shatsky, V.S., 1990. Diamond Inclusions in Garnets from Metamorphic Rocks: A New Environment for Diamond Formation. Nature, 343: 742-746 doi: 10.1038/343742a0 |
Tsai, C.H., Liou, J.G., 2000. Eclogite-Facies Relics and Inferred Ultrahigh-Pressure Metamorphism in the North Dabie Complex, Centra-l Eastern China. A m. Mineral. , 85: 1-8 doi: 10.2138/am-2000-0101 |
Wang, X., Liou, J.G., Mao, H.K., 1989. Coesite-Bearing Eclogites from the Dabie Mountains in Central China. Geology, 17: 1085-1088 |
Wang, X., Zhang, R.Y., Liou, J.G., 1995. U HP M Terrane in East Central China. In: Coleman, R., Wang, X., eds., Ultrahigh Pressure Metamorphism. Cambridge University Press, Cambridge. 356-390 |
Xiao, Y., Hoefs, J., van den Kerkhof, A.M., et al., 2001. Geochemical Constraints of the Eclogite and Granulite Facies Metamorphism as Recognized in the Raobazhai Complex from North Dabie Shan, China. J. Metamorphic Geol. , 19: 3-19 doi: 10.1046/j.1525-1314.2001.00290.x |
Xu, S., Liu, Y., Chen, G., et al., 2003. New Finding of Micro-diamonds in Eclogites from Dabie-Sulu Region in Centra-l Eastern China. Chinese Science Bulletin, 48: 988-994 |
Xu, S., Liu, Y., Su, W., et al., 2000. Discovery of the Eclogite and Its Petrography in the Northern Dabie Mountains. Chinese Science Bulletin, 453: 273-278 |
Xu, S., Liu, Y., Jiang, L., et al., 2002. Architecture and Kinematics of the Dabie Mountains Orogen. University of Science and Technology of China Press, Hefei. 133(in Chinese with English Abstract) |
Xu, S., Okay, A.I., Ji, S., et al., 1992. Diamond from the Dabie Shan Metamorphic and Its Implication for Tectonic Setting. Science, 256: 80-82 doi: 10.1126/science.256.5053.80 |
Ye, K., Cong, B., Ye, D., 2000. The Possible Subduction of Continental Material to Depths Greater than 200 km. Nature, 407: 734-736 doi: 10.1038/35037566 |
Zheng, Y.F., Fu, B., Gong, B., et al., 2003. Stable Isotope Geochemistry of Ultrahigh Pressure Metamorphic Rocks from the Dabie-Sulu Orogen in China: Implications for Geodynamics and Fluid Regime. Earth Science Rev iews, 62: 105-161 doi: 10.1016/S0012-8252(02)00133-2 |
Zheng, Y.F., Fu, B., Li, Y.L., et al., 2001. Oxygen Isotope Composition of Granulites from Dabieshan in Eastern China and Its Implications for Geodynamics of Yangtze Plate Subduction. Phys. Chem. Earth (A), 26: 673-684 doi: 10.1016/S1464-1895(01)00118-1 |