Abstract
Mafic xenoliths occur in Mesozoic diorites from nine localities in eastern Inner Mongolia from the Da Hinggan Mts. to Huabei craton. Their petrologic and geochemical features suggest that they are an intact suite of cumulate complex whose mineral assemblages contain typical patent mantle metasomatism minerals such as pargosite, phlogopite and apatite. Their REEs and trace element characteristics suggest a comagmatic relationship in these cumulates with different compositions. Isotopic dating of the xenoliths indicates that they are products of the mantle magmatic underplating in the Early Mesozoic (237–224 Ma), and they may provide direct evidence for the crust-mantle interaction and vertical accretion of continental crust under a background of the mantle upwelling in the Early Mesozoic in Huabei region.
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References
Rudnick, R. L., Xenoliths-samples of the lower continental crust,Continental Lower Crust, London: Elsevier, 1992, 269–316.
Leyreloup, A., Bodinier, J. L., Dostal, J., Petrology and geochemistry of granulite xenoliths from Central Hoggar (Algeria)-Implications for the lower crust,Contrib. Mineral Petrol., 1982, 79: 68.
Loock, G., Stosch, H. G., Seck, H. A., Granulite faces lower crustal xenoliths from the Eifel, West Germany: petrologicl and geochemical aspects,Contrib. Mineral Petrol., 1990, 105: 25.
Rogers, N. W., Hawkesworth, C. J., Proterozoic age and cumulate origin for granulite xenoliths, Lesotho,Nature, 1982, 299: 409.
Mattie, P. D., Condie, K. C., Selverstone, J.et al., Origin of the continental crust in the Colorado Plateau: Geochemical evidence from mafic xenoliths from the Nawajo Volcanic Field, southeastern USA,Geochimica et Coschimica Acta, 1997, 61: 2007.
Kempton, P. D., Harmon, R. S., Hawkesworth, C. J.et al., Petrology and geochemistry of lower crust granulites from the Geronimo Volcanic Field, southeastern Arizona,Geochimica at Cosmochimica Acta, 1990, 54: 3401.
Xu Yongsheng, Indo-Chinese Epoch complex in Luotuochang of Ju Ud League,Chinese Science Bulletin (in Chinese), 1983, 30 (19): 1564.
Menzies, M. A.et al., Metasomatic and enrichment processes in lithospheric peridotites, an effect of asthenosphere-lithosphere interaction,Mantle Metasomatism, London: Academic Press, 1987, 313.
Thompon, R. N., Some high-pressure pyroxenes,Miner. Mag., 1974, 39: 768.
Qiu Ruilong, Petrologic and geochemical characteristics of hornblende cumulate of Qianqiao-Xiangshan in Anhui Province,Acta Petrologica Sinica (in Chinese), 1992, 18:268.
Frey, F. A., Prinz, M., Ultrarnafic inclusions from Callos, Arizona: Petrologic and geochemical data bearing on their petrogenesis,Earth Planet. Sci. Lett., 1978, 38: 129.
Shao Ji’an, Mu Baolei, He Guoqi and Zhang Luqiao. Geological effects in tectonic superposition of Paleo Pacific domain and Paleo-Asian domain,Science in China, Series D, 1997, 40(6): 634.
Fan Qicheng, Liu Ruoxin, Li Simin, Zircon chronology and REEs geochemistry of granulite fium Hannuoba,Chinese Science Bulletin (in Chinese), 1998, 43(2): 133.
Shao Ji’an, Zang Shaoxian, Mu Baoleiet al., Extension of orogenic belts and upwelling of asthenosphere: the example of Hinggan-Mongolian orogenic belt,Chinese Science Bulletin, 1995, 40(1): 76.
Zhang Luqiao, Shao Ji’an, Zheng Guangrui, Metamorphic core complex in Ganzhuermiao, Innér Mongolia,Scientia Geologica Sinica (in Chinese), 1998, 33(2): 140.
Shao Ji’an, Zhang Luqiao, Mu Baolei, Tectono-thermal evolution of Middle-South section of Da Hinggan Mountain,Science in China, Ser. D (in Chinese), 1998, 28(3):193.
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Shao, J., Han, Q., Zhang, L. et al. Cumulate complex xenoliths in the Early Mesozoic in eastern Inner Mongolia. Chin.Sci.Bull. 44, 1272–1279 (1999). https://doi.org/10.1007/BF02885842
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DOI: https://doi.org/10.1007/BF02885842