Geochronology and Geochemistry of Jiuhuashan Granitic Volcanic-Intrusive Complex Rock in Xinlu Basin of Quzhou City, Zhejiang Province, and Their Geological Significance

被引：0
|
作者：
Han X. [1 ]
Wu Z. [1 ,3 ]
Liu R. [2 ]
Liu Q. [2 ]
Hui X. [2 ]
Jin M. [4 ]
Tang J. [4 ]
机构：
[1] Special Technology Exploration Center of China Coal Geology Bureau, Beijing
[2] Beijing Research Institute of Uranium Geology, Beijing
[3] School of the Earth Sciences and Resources, China University of Geosciences, Beijing
[4] Geological Party No.269, Nuclear Geological Bureau, Jinhua
来源：
| 2018年 / China University of Geosciences卷 / 43期
关键词：
A-type granite; Geochemistry; Granitic volcanic-intrusive complex; Quzhou city of Zhejiang province; SHRIMP zircon U-Pb geochronology; Uranium metallization;
D O I：
10.3799/dqkx.2018.254
中图分类号：
学科分类号：
摘要：
To understand the genesis of uranium deposits in different ore hosting rocks and discuss the relationship between deposits and tectonic geological setting of Xinlu volcanic basin in Quzhou City, Zhejiang Province, we have focused on Jiuhuashan granitic volcanic-intrusive complex by zircon U-Pb geochronology,major and trace element analysis, and Sr-Nd isotopic analysis. SHRIMP U-Pb dating of zircon grains from the volcanic and intrusive rocks yield ages of 134.9~137.8 Ma, and both of them have similar geochemical characteristic with high Al(11.96%~14.59%), Na2O+K2O(7.35%~9.30%), Zr+Nb+Ce+Y(>350), FeO*/MgO(>10) and Ga/Al ratio(>2.6×10-4), indicating that they are products of a synchronous magmatism with a typical characteristic of aluminous A-type granite. While those more acidic rocks have lower Zr and P contents, more enrichment in some LILEs,and more depletion in Ba, Ta, Nb, Ti and Eu, which announces a varying degree fractional crystallization in magma source. The isotope geochemical characteristics display young and dispersed Nd model age, high εNd(t) values in the range of -6.16 to 2.26, suggesting an input of mantle materials. We conclude the volcanic and intrusive rock formed in the same magmatic event which occurred at a tectonic setting of extension and upwelling of asthenosphere in Xinlu basin in early Cretaceous, and it provides a favourite ore-controlling structure, material source and heat for uranium mineralization. This also means those uranium deposits in different ore hosting rocks have similar genetic mechanism. © 2018, Editorial Department of Earth Science. All right reserved.
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页码：192 / 208
页数：16
相关论文
共 65 条
  • [11] Hui X.C., Han X.Z., Liu J.P., Et al., Tectonic Stress Field's Characteristic and Its Relationship of Uranium Mineralization at Dazhou Volcanic Faulted Basin in Quzhou, Zhejiang Province, Acta Geologica Sinica, 86, 2, pp. 228-240, (2012)
  • [12] Jia X.H., Wang Q., Tang G.J., A-Type Granites: Research Progress and Implications, Geotetonic et Metallogenia, 33, 3, pp. 465-480, (2009)
  • [13] Jiang Y.H., Jiang S.Y., Ling H.F., Mantle-Derived Fluids and Uranium Mineralization, Earth Science Frontiers, 11, 2, pp. 491-499, (2004)
  • [14] Jiang Y.H., Zhao P., Zhou Q., Et al., Petrogenesis and Tectonic Implications of Early Cretaceous S-and AType Granites in the Northwest of the Gan-Hang Rift, SE China, Lithos, 121, 1-4, pp. 55-73, (2011)
  • [15] King P.L., White A.J.R., Chappell B.W., Et al., Characterization and Origin of Aluminous A-Type Granites from the Lachlan Fold Belt, Southeastern Australia, Journal of Petrology, 38, 3, pp. 371-391, (1997)
  • [16] Li J.H., Zhang Y.Q., Dong S.W., Et al., Cretaceous Tectonic Evolution of South China: a Preliminary Synthesis, Earth-Science Reviews, 134, pp. 98-136, (2014)
  • [17] Li P.J., Yu X.Q., Li H.Y., Et al., Jurassic-Cretaceous Tectonic Evolution of Southeast China: Geochronological and Geochemical Constraints of Yanshanian Granitoids, International Geology Review, 55, 10, pp. 1202-1219, (2013)
  • [18] Li X.H., Li Z.X., Li W.X., Et al., U-Pb Zircon, Geochemical and Sr-Nd-Hf Isotopic Constraints on Age and Origin of Jurassic I-and A-Type Granites from Central Guangdong, SE China: a Major Igneous Event in Response to Foundering of a Subducted Flat-Slab?, Lithos, 96, 1-2, pp. 186-204, (2007)
  • [19] Li X.W., Mo X.X., Zhao Z.D., Et al., A Discussion on How to Discriminate A-Type Granite, Geological Bulletin of China, 29, 2-3, pp. 278-285, (2010)
  • [20] Li Z.L., Zhou J., Mao J.R., Et al., Zircon U-Pb Geochronology and Geochemistry of Two Episodes of Granitoids from the Northwestern Zhejiang Province, SE China: Implication for Magmatic Evolution and Tectonic Transition, Lithos, 179, pp. 334-352, (2013)
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