| 湖南香花岭矽卡岩中锡的矿物学行为与成矿过程 |
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| 引用本文： | 余雪戈,饶 灿,王吴梦雨,林晓青,覃莉茜.湖南香花岭矽卡岩中锡的矿物学行为与成矿过程[J].高校地质学报,2018,24(5):645. |
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| 作者姓名： | 余雪戈 饶 灿 王吴梦雨 林晓青 覃莉茜 |
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| 摘 要： | 湖南香花岭矽卡岩型锡矿床是南岭地区一个重要的锡多金属矿床，发育有丰富的含锡矿物。在野外和显微镜下观察
基础上，文章利用电子探针技术系统分析了香花岭矽卡岩中含锡矿物的矿物学特征，探讨了锡的成矿过程、成矿流体以及
锡的来源。研究结果表明，香花岭矽卡岩中含锡矿物由锡矿物（锡石、尼日利亚石、孟宪民石等）和富锡矿物（韭闪石、
尖晶石、葡萄石、塔菲石等）组成。锡的成矿有三个阶段：矽卡岩早阶段，Sn进入尖晶石、韭闪石等造岩矿物中，形成富
锡矿物；氧化物阶段，锡矿物如锡石、尼日利亚石、孟宪民石等逐渐晶出；晚期热液阶段，早期含锡矿物热液蚀变原位析
出锡石，或富Sn热液交代早期矿物形成了富锡环边。矽卡岩中成矿流体富含F，CO2，Li等挥发组分，控制了Sn的富集、迁
移、结晶等过程。香花岭矽卡岩中Sn根本上来源于地层，锡的成矿过程反映了Sn在地壳中的地球化学循环过程。
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| 关 键 词： | 含锡矿物 锡的成矿过程 矽卡岩 香花岭 |
Mineralogical Behavior and Metallogenic Process of Sn in the Xianghualing Skarn,Hunan Province |
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| YU Xuege,RAO Can,WANG-WU Mengyu,LIN Xiaoqing,QIN Lixi.Mineralogical Behavior and Metallogenic Process of Sn in the Xianghualing Skarn,Hunan Province[J].Geological Journal of China Universities,2018,24(5):645. |
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| Authors: | YU Xuege RAO Can WANG-WU Mengyu LIN Xiaoqing QIN Lixi |
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| Abstract: | Xianghualing tin deposit is one of the most important tin-polymetallic deposits in Nanling Region, and hosts abundant
Sn-bearing minerals. In this paper, the mineralogical characteristics of Sn-bearing minerals from the Xianghualing skarn were
systematically analyzed by electron microprobe technology, in combination with microscopic and field observations, with the aims
to reveal metallogenic processes, fluids features, and origin of Sn. The results of this study show that (1) Sn-bearing minerals in
the Xianghualing skarn include Sn minerals (cassiterite, nigerite, mengxianminite etc.) and Sn-rich minerals (pargasite, spinel,
prehnite, taaffeite etc.); (2) Three stages of Sn mineralization were distinguished: during the early skarn stages, Sn entered into
the structures of spinel, amphibole, and other rock-forming minerals, leading to the formation of Sn-rich minerals; Sn minerals
(cassiterite, nigerite, mengxianminite etc.) gradually crystallized during the oxidation stages, and in the hydrothermal stages early
Sn-bearing minerals experienced hydrothermal alteration with local precipitation of cassiterite, and/or the formation of minerals
with Sn-rich rims by Sn-rich fluids; (3) hydrothermal fluids are enriched in F, CO2 and Li, which controlled the processes of
enrichment, transport, and crystallization of Sn, and (4) Sn in the Xianghualing skarn was fundamentally derived from the ambient
strata, and the metallogenic processes of Sn reflect a geochemical circulation of Sn in Earth Crust. |
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| Keywords: | Sn-bearing minerals metallogenic processes of Sn skarn Xianghualing |
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