Elemental and Sm-Nd isotopic geochemistry on detrital sedimentary rocks in the Ganzi-Songpan block and Longmen Mountains
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- 作者：Yuelong Chen (1)
Fei Liu (1)
Hongfei Zhang (2)
Lanshi Nie (1)
Liting Jiang (1) - 关键词：clastic sedimentary rocks ; Ganzi ; Songpan block ; Nd model age ; provenance ; geotectonics
- 刊名：Frontiers of Earth Science
- 出版年：2007
- 出版时间：February 2007
- 年：2007
- 卷：1
- 期：1
- 页码：60-68
- 全文大小：703KB
- 参考文献：1. Boynton W V (1984). Geochemistry of the rare earth elements: Meteorite studies. In: Henderson P, ed. Rare Earth Element Geochemistry. New York: Elsevier, 63鈥?14
2. Bruguier O, Lancelot J R, Malavieille J (1997). U-Pb dating on single detrital zircon grains from the Triassic Songpan-Ganze flysch (Central China): Provenance and tectonic correlations. Earth Planet Sci Lett, 152(1鈥?): 217鈥?31 CrossRef
3. Bureau of Geology and Mineral Resources of Qinghai Province (1991). Regional Geology of Qinghai Province. Beijing: Geological Publishing House, 1鈥?62 (in Chinese with English abstract)
4. Bureau of Geology and Mineral Resources of Sichuan Province (1991). Regional Geology of Sichuan Province. Beijing: Geological Publishing House, 1鈥?30 (in Chinese with English abstract)
5. Chen Y L, Luo Z H, Zhao J X, et al (2005). Petrogenesis and dating of the Kangding complexes, Sichuan Province. Sci in China (Series D), 48(5): 622鈥?34 CrossRef
6. Chen Y L, Yang Z F (2000). Nd model ages of sedimentary profile from the northwest Yangtze craton, Guangyuan, Sichuan Province, China and their geological implication. Geochem Journal, 34(4): 263鈥?70
7. Chung S L, Jahn B M (1955). Plume-lithosphere interaction in generation of the Emeishan flood basalts at the Permian-Triassic boundary. Geology, 23: 889鈥?92 CrossRef
8. Gao S, Qiu Y M, Ling W L, et al (2001). SHRIMP single zircon U-Pb dating of the Kongling high-grade metamorphic terrain: Evidence for >3.2 Ga old continental crust in the Yangtze craton. Sci in China (Series D), 44(4): 326鈥?35 (in Chinese)
9. Gradstein F M, Ogg J G, Smith A G (2004). A new geologic time scale with special reference to Precambrian and Neogene. Episodes, 27(2): 83鈥?00
10. Li X H, Li Z X, Zhou H W, et al (2002a). U-Pb zircon geochronological, geochemical and Nd isotopic study of Neoproterozoic basaltic magmatism in western Sichuan: Petrogenesis and geodynamic implications. Earth Sci Frontiers, 9(4): 329鈥?38 (in Chinese with English abstract)
11. Li X H, Zhou H W, Li Z X, et al (2002b). Petrogenesis of Neoproterozoic bimodal volcanics in western Sichuan and its tectonic implications: Geochemical and Sm-Nd isotopic constraints. Chinese Journal of Geol, 37(3): 264鈥?76 (in Chinese with English abstract)
12. Li X H, McCulloch M T (1996). Nd isotopic evolution of sediments from the southern margin of the Yangtze block and its tectonic significance. Acta Petrologica Sinica, 12(3): 359鈥?69 (in Chinese with English abstract)
13. Li Z X, Li X H, Kinny P D, et al (2003). Geochronology of Neoproterozoic syn-rift magmatism in the Yangtze craton, South China and correlation with other continents: Evidence for a mantle super-plume that broke up Rodinina. Precambrian Res, 122: 85鈥?09 CrossRef
14. Ling W L, Gao S, Zhang B R, et al (1997). Early Precambrian continental crust evolution at the northern margin of Yangtze craton: Constrain from the elemental and isotopic geochemical study of Houhe complex. Journal of Mineralogy and Petrology, 17(4): 26鈥?2 (in Chinese with English abstract)
15. Ling W L, Gao S, Zhang B R, et al (2000). Late Paleoproterozoic tectonic-thermal events of the Yangtze continental nucleus and the Yangtze craton鈥檚 evolution. Chinese Sci Bull, 45(21): 2343鈥?348 (in Chinese)
16. Liu S (1998). On properties of tectonic movement in east margin of middle and northern Longmen Mountains at the end of Triassic period. Journal of Chengdu University of Technology, 25(4): 524鈥?28 (in Chinese with English abstract)
17. Liu S G, Zhao X K, Luo Z L, et al (2001). Study on the tectonic events in the system of the Longmen Mountain-West Sichuan foreland basin, China. Journal of Chengdu University of Technology, 28(3): 221鈥?30 (in Chinese with English abstract)
18. Pettijohn F J, Potter P E, Siever R (1973). Sand and sandstone. New York: Springer-Verlag, 1鈥?18
19. Roser B P, Korsch R J (1986). Determination of tectonic setting of sandstone mudstone suites using SiO2 content and K2O/Na2O ratio. J Geol, 94: 635鈥?50 CrossRef
20. Shen W Z, Lu H P, Xu S J, et al (1998). Sm-Nd isotopic study on metasediments in the area of Danba, China. Scientia Geologica Sinica, 33(3): 367鈥?73 (in Chinese with English abstract)
21. Sun C M (1994). Proterozoic ophiolites in West Sichuan and orogenic belt along the western margin of the Yangtze craton. Journal of Chengdu University of Technology, 21(3): 11鈥?6 (in Chinese with English abstract)
22. Wang Z X, Xu Z Q, Yang T N (1997). A model for deformation structure evolution of Songpan-Garze orogene. Scientia Geologica Sinica, 32: 327鈥?36 (in Chinese with English abstract)
23. Xu S J, Wang R C, Shen W Z, et al (1996). U-Pb, Rb-Sr isotopic chronology of Jinning granites in Songpan-Ganze orogenic belt and its tectonic significances. Sci in China (Series D), 39(6): 576鈥?86
24. Xu Z Q, Hou L W, Wang, Z X, et al. (1992). Building process of the Ganze-Songpan orogenic belt. Beijing: Geological Publishing House 1鈥?90 (in Chinese with English abstract)
25. Yang Z R (2002). The formation and evolution of the Songpan-Garze fore-arc basin, western Sichuan. Sedimentary Geology and Tethyan Geology, 22(3): 53鈥?9
26. Zhang B R, Gao S, Zhang H F, et al (2002). Geochemistry of the Qinling Orogenic Belt. Beijing: Science Press, 1鈥?87 (in Chinese)
27. Zhang Z C, Wang F S (2003). Sr, Nd and Pb isotopic characteristics of Emeishan basalt province and discussion on their source region. Earth Sci鈥擩ournal of China Univ of Geosci, 28(4): 431鈥?39 (in Chinese with English abstract)
28. Zou G F (1995). Advance of the research on the Garze-Litang plate junction. Acta Geologica Sichuan, 15(4): 257鈥?63 (in Chinese with English abstract) - 作者单位：Yuelong Chen (1)
Fei Liu (1)
Hongfei Zhang (2)
Lanshi Nie (1)
Liting Jiang (1)
1. School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China
2. Faculty of Earth Sciences, China University of Geosciences, Wuhan, 430074, China - ISSN：2095-0209
文摘
Systematic results of major and trace element geochemistry and Sm-Nd isotopic geochemistry on detrital sedimentary rocks of Precambrian to Triassic in the Ganzi-Songpan block and Longmen Mountains are presented. The rocks are classified into greywackes or feldspar sandstones, grains of which are the mixtures of mafic rocks, felsic rocks, and quartz+calcite. Total rare earth elements (REE) contents of the rocks increase gradually and negative Eu anomalies become more obvious from Precambrian to Triassic, which may indicate intensifying crustal anatexis. Tectonic setting was stable during the Late Paleozoic, therefore there are obvious negative Ce anomalies. Nd model ages are between 1.6 Ga and 2.4 Ga, which are very similar to those of the Yangtze craton, South Qinling and North Qinling belts and quite different from those of the North China craton. Therefore, provenance of the sedimentary rocks in the Ganzi-Songpan block and Longmen Mountains was the Yangtze craton and/or the Qinling orogen, which evolved on the basis of the Yangtze craton. The correlation between provenances and tectonostratigraphic strata of the western Yangtze craton shows that the source materials should be primarily from Neoproterozoic. Secondary sources were Archean and Paleoproterozoic strata. Triassic clastic sedimentary rocks contain Late Paleozoic mantle-derived materials, represented by the Emeishan Permian flood basalts. Spatial distribution of initial Nd isotopic compositions indicates that denudating areas were in the east and the north and depositing areas of deep water were in the west and the south for the Ganzi-Songpan basin during Triassic.