Geochemistry of the Mesozoic basaltic rocks in southern Hunan Province
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Southern Hunan Province is famous for its intensive rare, radioactive and other metal elements’ mineralizations. There is a relation between the basaltic rocks and mineralizations in space, time and ore-forming elements. The Jurassic-Cretaceous (204–81 Ma) basaltic rocks consists mainly of alkali-basalt and tholeiitic basalt formed in plate environment. Trace elements and Sr, Nd, Pb isotopic compositions show that the regional mantle source was metasomatized shortly before the partial melting. The alkali basalt and tholeiitic basalt might be 3%–5% and 10%–15% of the partial melting of the enriched mantle source respectively. Obviously the enrichment of the regional mantle played an important role in formation of the large and super-large deposits in southern Hunan Province.
Keywordsbasaltic rocks trace element isotope mantle metasomatism super-large deposit southern Hunan Province
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- 1.Huang Guoxiang, Geochemical characteristics of the basalts in Xintian-Ningyuan-Daoxian belt,Hunan Geology (in Chinese), 1980, 8(3): 33.Google Scholar
- 2.Wang Jingbin, Geochemical feature and structural implication of Huziyan basalt rock mass and its xenolith in Daoxian,Hunan Geology (in Chinese), 1991, 11 (1): 52.Google Scholar
- 3.Chen Bihe, Main features of basic-ultrabasic volcanic rocks of Baoan, Ningyuan County,Hunan Geology (in Chinese), 1994, 13(4): 193.Google Scholar
- 4.Le Maitre, R. W.,A Classification of Igneous Rocks and Glossary of Ternzs, Oxford: Blackwell, 1989, 193.Google Scholar
- 5.Liu Yimao, Wang Changlie. Xu Youzhi et al., Metallization and metallogenetic conditions of Shiehuyuan ultra-large tungsten deposit,Hunan Geology (in Chinese), 1995. 14(4): 211.Google Scholar
- 6.Liu Ying, Liu Haichen, Li Xian Hua. Simultaneous and precise determination of 40 elements in rock samples using ICP-MS,Geochemia (in Chinese), 1996, 25(6): 552.Google Scholar
- 8.Zhi Xiachen, Feng Jialin. The geochemistry of basalt in Hannuoba, inThe Age and Geochemistry of Cenozoic Volcanic Rock in China (in Chinese), Beijing: Seismic Press, 1992, 114–146.Google Scholar
- 12.Norry, M. J. Fitton, J. G., Compositions differences between oceanic and continental basic lavas and significance, inContinental &salts and Mantle Xenoliths (eds. Hawkesworth. C. J., Norry. M. J.). Nantwich: Shiva Pub., 1983, 5–19.Google Scholar
- 13.Leroex, A., Dick, H. J. B., Fisher, R. L., Petrology and geochemistry of MORB from 25’E to 46’E along the Southwest Indian ridge: evidence for contrasting styles of mantle enrichment,J. Petrol., 1989, 30(4): 947.Google Scholar