| Tantalite in Suzhou Granite：mineralogy and Geological Implications |
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| 引用本文： | 王汝成,林承毅,等.Tantalite in Suzhou Granite：mineralogy and Geological Implications[J].中国地球化学学报,1997,16(4):353-358. |
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| 作者姓名： | 王汝成 林承毅 |
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| 作者单位： | [1]DepartmentofEarthSciences,InstituteofGraniteandMetallogeny,NanjingUniversity,Nanjing,210093 [2]CenterofM,InstituteofGraniteandMetallogeny,NanjingUniversity,Nanjing,210093 |
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| 摘 要： | Tantalite,occurring as intergranular tabular crystals,was reported for the first time in the Suzhou granite.Electron microprobe analyses show that it is rich in W and Ti,with a Ta/(Ta Nb) ratio ranging from 0.5 to 0.73 and a Mn(Mn Fe) ratio between 0.20 and 0.40.It is structurally distinct from isomorphic tapiolite by a remarked Ag Raman peak at 880cm^-1.The associated zircon is striking by significant enrichment of Hf,with the HfO2 content amounting up to 35%-40%,The discovery of tantalite suggests that the Suzhou granite should be classified as a S-type granite instead of A-type as considered previously.
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| 关 键 词： | 矿物学 钶铁矿 钽铁矿 苏州市 花岗岩 地质作用 |
Tantalite in Suzhou granite: Mineralogy and geological implications |
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| Rucheng Wang,Shijin Xu,Fontan Francois,Chengyi Lin.Tantalite in Suzhou granite: Mineralogy and geological implications[J].Chinese Journal of Geochemistry,1997,16(4):353-358. |
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| Authors: | Rucheng Wang Shijin Xu Fontan Francois Chengyi Lin |
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| Affiliation: | (1) Department of Earth Sciences, Institute of Granite and Metallogeny, Nanjing University, 210093 Nanjing;(2) Laboratory of Mineralogy, University of Toulouse, France;(3) Center of Material Analysis, Nanjing University, 210093 Nanjing |
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| Abstract: | Tantalite, occurring as intergranular tabular crystals, was reported for the first time in the Suzhou granite. Electron microprobe
analyses show that it is rich in W and Ti, with a Ta/(Ta + Nb) ratio ranging from 0.5 to 0.73 and a Mn/(Mn + Fe) ratio between
0.20 and 0.40. It is structurally distinct from isomorphic tapiolite by a remarked Ag Raman peak at 880 cm−1. The associated zircon is striking by significant enrichment of Hf, with the HfO2 content amounting up to 35% – 40%. The discovery of tantalite suggests that the Suzhou granite should be classified as a
S-type granite instead of A-type as considered previously.
This project was financially supported by the National Natural Science Foundation of China (No. 48900013) and the State Education
Commission Foundation for Those Who Have Turned Back from Abroad. |
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| Keywords: | columbite tantalite S-type granite Suzhou granite |
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