Abstract
In Tuoyun area of southwestern Tianshan, mantle and lower crust xenoliths are present in the volcanic rocks with ages of 101–123 Ma. Mantle xenoliths include mineral megacrysts such as kaersutite and pargasite, feldspar, biotite, and rare pyroxene and rock fragments such as perodotite, pyroxenite, amphibolite, and rare glimmerite. Lower crust xeno-liths are mainly banded and massive granulite. The volcanic rocks were produced by within-plate magmatism. Occurrence of hydrous and volatile mineral megacrysts, amphibolite, and some pyroxenite containing hydrous and volatile minerals indicates that mantle metasomatism was intense. Undoubtedly, this discovery is very important to understanding of the crust-mantle structure and geodynamic background in depth in southwestern Tianshan and geological correlation with adjacent regions.
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References
E Molan, Zhao Dasheng,Cenozoic Volcanic Rocks and Deep-seated Xenoliths of Eastern China (in Chinese). Beijing: Science Press, 1987.
Chi Jishang,The Study of Cenozoic Basalts and Upper Mantle Beneath Eastern China (Attachment: Kimberlites) (in Chinese), Wuhan: China University of Geosciences Press, 1988.
Iai Shaocong, Deng Jinfu, Zhao Hailing,Volcanism and Tectonic Evolution of Northern Edge of Tibet (in Chinese), Xi’ an: Shaanxi Science and Technology Press, 1996.
Xu Xueyi, Huang Yuehua, Xia Linqiet al., Characteristics of phlogopite-amphibole pyroxenite xenoliths from langao County, Shanxi Province.Acta Petrologica et Mineralogica (in Chinese), 1996, 15: 193.
Zhou Xinmin, Yu Jinhai, Xu Xisheng, Discovery and significanace of granulite xenoliths in Nushan hasalts, East China,Chinese Science Bulletin (in Chinese), 1992, 37: 1730.
Xie Manze, Feng Jialin, Zhang Gailanet al., The discovery of granulite xenoliths in Hannuoba basalt, North Hebei. China,Journal of Hebei College of Geology (in Chinese), 1993, 16: 587.
Fan Qicheng, Liu Ruoxin, High-temperature granulite xenoliths from the Honnuoba basalts,Chinese Science Bulletin (in Chinese), 1996, 43(1): 235.
Wang Jingbin, Geochemical feature and structural implication of Huziyan basalt rock mass and its xenolith in Dao County,Hunan Geology (in Chinese), 1991, 10: 52.
Zhong Yingxian, Liu Yuanchao, Cai Xuelin, Study of the granulite xenoliths from the lower crust in basalt, Hunan, China,Joumal of Chengdu College of Geology (in Chinese), 1993, 20: 56.
Zhou Qingjie. Zheng Jianjing. Liu Ziguiet al., Structural Analysis of Tarim (in Chinese), Beijing: Science Press, 1990.
Li Yongan, Li Qiang, Zhang Huiet al. Palaeomagnetic study of Tarim and its adjacent area as well as the formation and evolution of the basin,Xinjiang Geology (in Chinese), 1995, 13: 293.
Mmzies, M., Rogers, N., Tindle, A.et al., Metasomatic and enrichment processes in lithospheric peridotites, an effect of asthenosphere-lithosphere interaction.Mantle Metasomatism London: Academic Press. 1987. 313–361.
Rudnick, R. L., Xenoliths—samples of the lower continental crust,The Continental Lower Crust, New York: Elsevier, 1992, 269–316.
Zhou Xinmin, Chen Tuhua. Liu Changshiet al., Pyroxene and amphibole megacrysts in alkali basaltic rocks from southeastern coastal provinces of China,Acta Mineralogica Sinica (in Chinese), 1982(1): 13.
Lu Fengxiang,Mantle Petrology (in Chinese), Wuhan: China University of Geosciences Press, 1989
Fan Qicheng, Liu Ruoxin, Ma Baolin, Upper-mantle amphiboles from China and their genetic implications,Acta Mineralogica Sinica (in Chinese), 1992, 12: 353.
Kadik, A. A., Zharkova, E. V., Lutkov, V. S.et al., Redox state of peridotite xenoliths from south and middle Tyan Shan: experimental determination,Geokhimia (in Russian), 1995(8): 1094.
Khamrabayev, I. Kh., Iskandarov, E., Khamrabayeva, Z. I.et al., Glimmerites and similar to them rocks of the Middle Asia, inProceedings of the Russian Academy of Sciences, Geological Series (inRussian), 1992(5): 52.
Budanova, K. T., Mogarovsky, V. V., Partial melting phenomena in the crust xenoliths from alkaline basaltoids of the southern Tien Shan,Geokhimia (in Russian), 1988(3) : 454.
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Han, B., Wang, X., He, G. et al. Discovery of mantle and lower crust xenoliths from early Cretaceous volcanic rocks of southwestern Tianshan, Xinjiang. Chin.Sci.Bull. 44, 1119–1123 (1999). https://doi.org/10.1007/BF02886139
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DOI: https://doi.org/10.1007/BF02886139