Abstract
Emplacement ages of lamproites that comprise lamproite and olivine lamproite in Zhenyuan County, Guizhou Province, China, have been constrained by the whole-rock Sm-Nd and Rb-Sr isochron methods and the whole rock K-Ar method. Intrusive activities of lamproites in the Sinantang area of Zhenyuan County, Guizhou Province, took place during the Late Cambrian, as indicated by the Sm-Nd isochron ages (t) = (503±17) (2σ) Ma and by the Rb-Sr isochron ages (t) = (501.2±4.6) (2σ) Ma. Intrusive activities of olivine lamproites at the Maping with II-type diamond and Xitou in Zhenyuan County, Guizhou Province, took place from the Late Cambrian to the Early Ordovician, as evidenced by the Sm-Nd isochron ages (t) = (502±27) (2σ) Ma and by the Rb-Sr isochron age (t) = (502±27) (2σ) Ma. This suggests that the upwelling hot materials derived from the deep mantle were emplaced from the Late Cambrian to the Early Ordovician (503–497 Ma), while the time terminal of cooling of the geothermal event of magmatism-tectonism probably was at 442.64–435.54 Ma, as dated by the whole rock K-Ar method.
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Allsopp, H. L., Bristow, J. W., Smith, C. B. et al., A summary of radiometric dating methods applicable to kimberlites related rocks, Kimberlites Related Rocks (ed. Ross, J.), Melbourne: Blackwell, 1988, 343.
Lu Fengxiang, Zhao Lei, Deng Jinfu et al., The discussion on the ages of kimberlitic magma activity in North China Platform, Acta Petrologica Sinica (in Chinese with English abstract), 1995, 11(4): 365.
Pearson, D. G., Shirey, S. B., Carlson, R. W. et al., Re-Os, Sm-Nd and Rb-Sr isotope evidence for thick Archaean lithosphere beneath Siberia modified by multi-stage metasomatism, Geochimica et Cosmochimica Acta, 1995, 59(5): 959.
Liu Guanliang, Wang Xiongwu, Lü Xuemiao, Dahongshan Lamproite (in Chinese with English abstract), Beijing: Geological Publishing, 1993, 51.
Ma Dashuan, Petrologic natures of kimberlite and accompanying rocks, Journal of Yichang Institute of Mineral and Geology, Chinese Academy of Geosciences (in Chinese with English abstract), Beijing: Geological Publishing, 1983, (7): 65.
Mei, H. J., Tang, C. J., Li, S. R. et al., Lamproites and kimberlites in China and the genesis of diamond deposit, Science in China, Ser. D, 1998, 41(supp.): 83.
Jiang, W., Mineralogical and Petrological Study on Lamproite in Zhenyuan Area (in Chinese with English abstract), Guizhou Geoscience, 1995, 9(3): 351
Wang, Y., Ling, W. L., Lu, F. X., New emplacement age of Shandong Mengyin kimberlite, Geological Science and Technology Information (in Chinese with English abstract), 1997, 16(3): 8
Huang, Z. L., Jin, Z. S., Zhu, C. M. et al., The Sr, Nd isotopic composition of lamprophres in the Laowangzhai gold orefield, Yunnan Province, China, Chinese Sci. Bull., 1998, 43(11): 950.
Wang Yinxi, Yang Jiedong, Tao Xianchong et al., Experimental research on Sm-Nd isotopic method of fossil-mineral-rock and its application, Journal of Nanjing University (in Chinese), 1998, 20: 297.
Xu Yigang, Magmatism of continental basalt in extensional environments: Nature and dynamic process, Chemical Geodynamics (ed. Zheng Yongfei) (in Chinese), Beijing: Science Press, 1999, 119.
Sun, S. S., McDonough, W. F., Chemical and isotopic systematics of oceanic basalts: Implication for mantle composition and process, Magmatism in the Ocean Basin (eds. Saunder, A. D., Norry, M. J.), London: Geological Society Special Plublication, 1989, 42, 313.
Mei Houjun, Transitional relationships between kimberlite and ultrapotassium rock in China, Pioneering, Innovation, and Exertion (in Chinese), Chongqing: Chinese Publish House of Science and Literature, 1990, 54.
Kaminsky, F. V., Diamond from the Guaniamo area, Venezuela, The Canadian Mineralogist, 2000, 38: 1347.
Dungan, M. A., Lindstrom, M. M., McMiland, N. J. et al., Open system magmatic evolution of the Taos Plateau volcanic field, Northern New Mexico, Part I, The petrology and geochemistry ofthe Servilleta basalt, J. Geophys. Res., 1986, 91: 5999.
Hofmann, N. R. A., McKenzie, D. P., The destruction of geochemical heterogeneities by differential fluids motion during mantle convection, Geophys. J. R. Astr. Soc., 1985, 82: 163.
Taylor, S. R., McLennan, S. M., The Continental Crust: Its Composition and Evolution, Boston: Blackwell Scientific, 1985
Wenrich, K. J., Spatial migration and compositional changes of Miocene-Quaternary magmatism in Western Grand Canyon, J. Geophys. Res., 1995, 100: 10417.
Cliff, R. A., Janes, G., Chol, W. C. et al., Strontium isotopic equilibration during metamorphism of tillites from Ogcheon belt, South Korea, Contrib. Mineral Petrol., 1985, 90: 346.
Humphrises, F. J., Cliff, R. A., Sm-Nd dating and cooling history of Scourian granulites, Sutherland, Nature, 1982, 295: 515.
Cliff, R. A., Gray, C. M., Huhma, H. A., Sm-Nd isotopic study of the south Harris igneous complex, the outer Hebrides, Contrib. Mineral Petrol., 1983, 82: 91.
Li Xianhua, Application and limitation of Sm-Nd model dating and Sm-Nd isochronal dating, Geosciences (in Chinese with English abstract), 1996, 31(1): 97.
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Fang, W., Hu, R., Su, W. et al. On emplacement ages of lamproites in Zhenyuan County, Guizhou Province, China. Chin.Sci.Bull. 47, 874–880 (2002). https://doi.org/10.1360/02tb9196
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DOI: https://doi.org/10.1360/02tb9196