Neoproterozoic tin mineralization in South China: geology and cassiterite U–Pb age of the Baotan tin deposit in northern Guangxi
Neoproterozoic tin mineralization in South China: geology and cassiterite U–Pb age of the Baotan tin deposit in northern Guangxi
复制标题
华南新元古代锡矿化：桂北宝滩锡矿床地质及锡石U-Pb年龄
DOI：
10.1007/s00126-019-00862-y
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发表时间：
2019-11
影响因子：
4.8
通讯作者：
Qiang Zhang
中科院分区：
文献类型：
--
作者：
Shitao Zhang;Rongqing Zhang;Jianjun Lu;Dongsheng Ma;Teng Ding;Shouye Gao;Qiang Zhang
宝滩锡存款（23Mt@0.43%Sn）矿床位于中国南方九湾大山-元宝山地区。产于新元古代镁铁质/变质沉积岩和品营花岗岩体的顶部。蚀变成矿作用可分为六个阶段：成矿前蚀变阶段、绿辉云英岩阶段、绿辉-电气石-石英脉阶段、绿辉-石英脉阶段、绿辉-硫化物脉阶段和成矿后石英/方解石-石英脉阶段。锡矿化主要为黄长石云英岩、黄长石-电气石-石英、黄长石-石英脉期。该存款以广泛的电气石化为特征。成矿前和成矿期的电气石都是黑色的。成矿前电气石-石英结核中的电气石具有较高的Al_2O_3和F含量，Fe/（Fe.+ Mg）和Na/（Na + Ca）比值，可能受初始岩浆流体的控制。成矿期电气石的Al_2 O_3、F含量和Fe/（Fe + Mg）、Na/（Na + Ca）比值较低，可能受周围镁铁质岩石的影响。采用LA-ICP-MS法测定了浸染状黄长石-电气石-石英矿石和黄长石-石英脉中黄长石的206 Pb/238 U加权平均年龄分别为832 ± 5 Ma和834 ± 4 Ma（2 σ）。这两个年龄与前人报道的坪英花岗岩锆石U-Pb年龄834-835 Ma一致，表明锡矿化与花岗岩有关。花岗岩具有低磁化率和低锆石Ce ~（4+）/Ce ~（3+）比值，与含锡钛铁矿系列花岗岩相似。研究证实了华南新元古代锡成矿事件，并指出扬子地块东南缘新元古代高度分馏的S型花岗岩具有巨大的锡成矿潜力。
The Baotan tin deposit (23 Mt @ 0.43% Sn) is located in the Jiuwandashan–Yuanbaoshan area, South China. It is hosted in.Neoproterozoic mafic/metasedimentary rocks and apical portions of the Pinying granite pluton. Six alteration and mineralization.stages have been identified: pre-ore alteration, cassiterite greisen, cassiterite–tourmaline–quartz vein, cassiterite–quartz vein,.cassiterite–sulfide vein, and post-ore quartz/calcite–quartz vein stages. Tin mineralization is mainly in the cassiterite greisen, cassiterite–tourmaline–quartz, and cassiterite–quartz vein stages. The deposit is characterized by widespread tourmalinization. Both pre-ore.and ore-stage tourmaline is schorl. Tourmaline from pre-ore tourmaline–quartz nodules has elevated Al2O3 and F contents and Fe/(Fe.+ Mg) and Na/(Na + Ca) ratios, which are probably controlled by the initial magmatic fluid. Ore-stage tourmaline shows low Al2O3.and F contents and Fe/(Fe + Mg) and Na/(Na + Ca) ratios, which are likely influenced by the surrounding mafic rocks. LA–ICP–MS.U–Pb dating on two cassiterite samples from disseminated cassiterite–tourmaline–quartz ore and cassiterite–quartz vein yields.206Pb/238U weighted mean ages of 832 ± 5 Ma and 834 ± 4 Ma (2 σ), respectively. These two dates are consistent with the previously.reported zircon U–Pb ages of 834–835 Ma for the Pingying granite, which indicates that tin mineralization is related to the granite. The.granite has low magnetic susceptibility and zircon Ce4+/Ce3+ ratios, which are similar to those of Sn-bearing ilmenite-series granites..Our study confirms the Neoproterozoic tin mineralization event in South China and indicates that the Neoproterozoic highly fractionated S-type granites in the southeastern margin of Yangtze Block have a great potential for tin mineralization.
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影响因子：
5.8
作者：
Peng Liu;J. Mao;M. Santosh;Lingang Xu;Rongqing Zhang;Lihui Jia
通讯作者：
Peng Liu;J. Mao;M. Santosh;Lingang Xu;Rongqing Zhang;Lihui Jia
影响因子：
3.3
作者：
Jia Guo;Rongqing Zhang;Cong-ying Li;Wei-dong Sun;Yong-bin Hu;Deming Kang;Junde Wu
通讯作者：
Jia Guo;Rongqing Zhang;Cong-ying Li;Wei-dong Sun;Yong-bin Hu;Deming Kang;Junde Wu
DOI：
10.1007/bf01820581
发表时间：
1987-02
期刊：
Geologische Rundschau
影响因子：
--
作者：
B. Lehmann
通讯作者：
B. Lehmann
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影响因子：
3.3
作者：
Panlao Zhao;Shunda Yuan;Jingwen Mao;Yabin Yuan;Haijie Zhao;Dongliang Zhang;Yan Shuang
通讯作者：
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影响因子：
3.3
作者：
Yuan Yabin;Yuan Shunda;Mao Jingwen;Zhao Panlao;Yan Chen;Zhao Haijie;Zhang Dongliang;Shuang Yan;Peng Jiantang
通讯作者：
Peng Jiantang