Zircon Geochronology of Granodiorite Porphyry in Yaojialing Mine, Anhui Province, and its Geological Implications

Abstract:

This study reports the petrological characteristics and zircon geochronology based on laser ablation ICP mass spectrometry. Zircons extracted from granodiorite porphyry display oscillatory zoning that suggests magmatic crystallization with the ratios of Th/U (0.34~1.20). The zircons yield early cretaceous 206Pb/238U age of (141.0±1.7) Ma that constrains the approximate timing of formation of the granodiorite porphyry. Inherited zircons yield 206Pb/238U age of (490±24) Ma and (556±27) Ma, and 207Pb/206Pb age of (2444±21) Ma implying that the granodiorite porphyry was sourced from middle and lower crust possibly.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 2467-2472
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.2467
• Online since: February 2012
• Authors: Shao Feng Liu, Yang Song Du, Yi Cao, Zhen Shan Pang
• Keywords: Anhui, Granodiorite Porphyry, Tongling, Yaojialing Deposit, Zircon U-Pb Ages

References

[1] Q.S. Jiang, C.S. Han, J.M. Huang, X.H. Shi: Geological report of general survey of the Yaojialing copper-lead-zinc deposit in Nanling, Anhui province (2010). (in chinese)

[2] Q.S. Jiang, Z.H. Zhao, J.M. Huang, Discovery of the Yaojialing copper-lead-zinc deposit in Nanlin, Anhui, and its significance, Geology in China. 35 (2008) 314-321. (in chinese)

[3] C.H. Wen, W.Y. Xu, H. Zhong, Q.T. Lü, Z.S. Yang, S.H. Tian, Y.C. Liu, Geological characteristics and fluid inclusion studies of shallow mineralization in Yaojialing Zn-Au polymetallic deposit, Anhui Province, Mineral deposits. 30 (2011) 533-546. (in chinese)

[4] Y.F. Chang, X.P. Liu, Y.C. Wu, The copper-iron belt of the Lower and Middle Rreaches of the Changjiang River, Geological Publishing House, Beijing, 1991. (in chinese)

[5] Yoshida H., Metcalfe R., Seida Y., Retardation capacity of altered granitic rock distributed along fractured and faulted zones in the orogenic belt of Japan, Engineering geology. 106 (2009) 116-122.

DOI: 10.1016/j.enggeo.2009.03.008

[6] Jackson, S., E., Pearson, N., J., Griffin, W., L., et al., The application of laser ablation-inductively coupled plasna-mass spectrometry to in situ U-Pb zircon geochronology, Chem Geol. 211 (2004) 47- 69.

DOI: 10.1016/j.chemgeo.2004.06.017

[7] Ludwig, K., R., User's manual for isoplot /EX Version 3. A geochronological toolkit for microsoft excel Brkeley Geochronology Center, Special Publication, 2003, pp.41-70.

[8] Vavra, G., Schmid, R. Gebauer, D., Internal morphology, habit and U-Th-Pb microanalysis of amphibolite-to-granulite facies zircons: geochronology of the Ivrea Zone (Southern Alps), Contrib Mineral Petrol. 134 (1999) 380- 404.

DOI: 10.1007/s004100050492

[9] Y.B. Wu, D.G. Chen, Q.K. Xia, et al., LA-ICP-MS race earth element analysis and Pb-Pb dating of zircon from granulite in Huangtuling, Dabie mountain, China, Science in China (Series D). 33 (2003) 20-28. (in chinese)

DOI: 10.1360/02yd0035

[10] Belousova, E., A., Griffin, W., L., Reilly,S., Y., et al., Igneous zircon: Trace element composition as an indicator of source rock type, Contrib Mineral Petrol. 143 (2002) 602-622.

DOI: 10.1007/s00410-002-0364-7

[11] G.G. Wu, D. Zhang, Y.J. Di, et al., Zircon SHRIMP U-Pb geochronology of intrusive rocks in Tongling area and its setting for deep dynamic, Science in China (Series D). 38 (2008) 630-645. (in chinese)

[12] J.C. Xie, X.Y. Yang, J.G. Du, et al., Zircon U-Pb geochronology of the Mesozoic intrusive rocks in the Tongling region: Implications for copper-gold mineralization. Acta Petrologica Sinica, 24 (2008) 1782-1800. (in chinese)

[13] J.F. Deng, Z.X. Wu, Lithospheric thinning event in the Lower Yangtze Craton and Cu-Fe metallogenic belt in the Middle and Lower Yangtze River Reaches, Geology of Anhui. 11 (2001) 86-91. (in chinese)

[14] Y.S. Du, S.T. Li, Y. Cao, et al., UAFC-related origin of the Late Jurassic to Early Cretaceous intrusions in the Tongguanshan ore field, Tongling, Anhui Province, EastChina, Geoscience. 21 (2007) 71-77. (in chinese)