Abstract
The eclogite, discovered in Liuyuan, occurs as lenticular enclave within granitic gneiss. It has typical features of eclogite in petrology and mineralogy. The eclogite provides an important window to reconstruct the tectonic border of the Tarim block. The granitoids, located in Baihu area, yield U-Pb zircon ages of 1 660–2 000 Ma (Palaeoproterozoic), which implies an early Precambrian basement in the area.
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Zuo, G., Li, M.,Formation and Evolution of the Early Paleozoic Lithosphere in the Beishan Area, Gansu-Inner Mongoli-a, China (in Chinese), Lanzhou: Gansu Science and Technology Press, 1996.
Mei, H., Yu, H., Li, Q.et al., Preliminary litho-tectonic framework of Precambrian rocks in Dunhuang and Beishan areas,Progress in Precambrian Research (in Chinese), 1997, 20(4): 47.
Powell, R., Regression diagnostics and robust regression in geothermometer/geobarometer calibration: the gamet-clinopyroxene geothermometer revisited,J. Metamorphic Geol., 1985, 3: 231.
Ellis, D. J., Green, D. H., An experimental study of the effect of Ca upon gamet-clinopyroxene Fe-Mg exchange equilibria,Contr. Minerl. Petrol., 1979, 71: 13.
Holland, T. J. B., The reaction albite=jadecite + quartz determined experimentally in the range 600–1200C,Am. Miner., 1980, 65: 129.
Li, H., Dong, C., Wu, X.et al., U-Pb ages of single zircon grains for gabbro, Quanzhou,Chinese Science Bulletin (in Chinese), 1995, 40(2): 158.
Li, Z., New speculation of the age of the metamorphic rock series of the Dunhuang massif,Regional Geology of China (in Chinese), 1994, (2): 131.
Mei, H., Lu, S., Li, H.et al., Age and origin of the Liuyuan granitoid, northwestern Gansu Province, China,Acta Petrologica et Mineralogic (in Chinese) (in press).
Dobretsov, N. L., Blueshist and eclogites: a possible plate tectonic mechanism for their emplacement from the upper mantle,Tectonophysics, 1991, 186: 253.
Xiao, X., Tang, Y., Li,J. et al., Tectonic evolution of north Xinjiang,Xinjiang Geoscience (in Chinese), 1990(1): 147.
Kang, W., Hu, K., Liang, W.et al., The Proterozoic High Pressure Metamorphic Belt in Central China (in Chinese), Beijing: Geological Publishing House, 1995.
Wei, C., Wang, S., Zhang, L.,et al., Some insights on theP-T path and exhumation of ultrahigh-pressure eclogites in central China,Acta Petrologica Sinica (in Chinese), 1996, 12(1): 70.
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Mei, H., Yu, H., Li, Q. et al. The first discovery of eclogite and Palaeoproterozoic granitoids in the Beishan area, northwestern Gansu Province, China. Chin.Sci.Bull. 44, 356–361 (1999). https://doi.org/10.1007/BF02885491
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DOI: https://doi.org/10.1007/BF02885491