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Metallogenic controls on the granite-related W–Sn deposits in the Hunan–Jiangxi region, China: evidence from zircon trace element geochemistry
Yuannan Feng; Tingguang Lan; Lichuan Pan; Tingting Liu; Shaohua Dong
2019
发表期刊Acta Geochim
页码1-11
摘要

The Nanling Range in South China is well known for its rich granite-related W–Sn deposits. To elucidate the controls of different granite-related W–Sn metallogenesis in the region, we chose five representative orerelated granites (Yanbei, Mikengshan, Tieshanlong, Qianlishan, and Yaogangxian intrusions) in the Hunan–Jiangxi region, and studied their magmatic zircon ages and trace element geochemistry. Our new zircon data showed the differences in ages, temperatures and oxygen fugacity of the ore-forming magmas. Zircon U–Pb ages of the Yanbei and Mikengshan intrusions are characterized by 142.4 ± 2.4 and 143.0 ± 2.3 Ma, respectively, whereas the Tieshanlong and Qianlishan intrusions are 159.5 ± 2.3 and 153.2 ± 3.3 Ma, respectively. The Sn-related intrusions were younger than the W-related intrusions. The Tiin-zircon thermometry showed that there was no systematic difference between the Sn-related Yanbei (680–744 C) and Mikengshan (697–763 C) intrusions and the W-related Tieshanlong (730–800 C), Qianlishan (690–755 C) and Yaogangxian (686–751 C) intrusions. However, the zircon Ce4?/Ce3? ratios of the Yanbei (averaged at 18.3) and Mikengshan (averaged at 18.8) intrusions are lower than those of the Tieshanlong (averaged at 36.9), Qianlishan (averaged at 38.4) and Yaogangxian (averaged at 37) intrusions, indicating that the Sn-related granitic magmas might have lower oxygen fugacities than those of the W-related. This can be explained by that, in more reduced magmas, Sn is more soluble than W and thus is more enriched in the residual melt to form Sn mineralization. The difference in source materials between the Sn-related and the W-related granites seems to have contributed to the different redox conditions of the melts.

关键词W–sn Deposits south China zircon Trace Element Chemistry ti-in-zircon Thermometry oxygen Fugacity
收录类别EI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/10527
专题矿床地球化学国家重点实验室
作者单位1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.The Fifth Geology Company of Hebei Geology and Mineral Bureau, Tangshan 063000, China
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Yuannan Feng,Tingguang Lan,Lichuan Pan,等. Metallogenic controls on the granite-related W–Sn deposits in the Hunan–Jiangxi region, China: evidence from zircon trace element geochemistry[J]. Acta Geochim,2019:1-11.
APA Yuannan Feng,Tingguang Lan,Lichuan Pan,Tingting Liu,&Shaohua Dong.(2019).Metallogenic controls on the granite-related W–Sn deposits in the Hunan–Jiangxi region, China: evidence from zircon trace element geochemistry.Acta Geochim,1-11.
MLA Yuannan Feng,et al."Metallogenic controls on the granite-related W–Sn deposits in the Hunan–Jiangxi region, China: evidence from zircon trace element geochemistry".Acta Geochim (2019):1-11.
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