Study on typomorphic mineral of pyrite in Lailishan tin deposit of Yunnan Province
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摘要: 来利山锡矿床位于喜马拉雅—特提斯构造域东端,三江构造带南段西缘,是滇西地区著名的锡多金属矿床之一。为探讨矿床成因,进而为找矿勘探提供科学依据,对该矿床黄铁矿进行标型矿物学研究。来利山锡矿成矿阶段发育大量黄铁矿,采用傅里叶变换红外光谱仪对黄铁矿进行研究,发现黄铁矿存在不同程度的类质同象取代现象,不同成矿阶段的黄铁矿图谱和吸光度均存在一定差异,从第一阶段到第四阶段特征峰向短波方向漂移; 成矿阶段黄铁矿吸光度比值与成矿阶段呈规律性变化。上述成果对该区进一步找矿具有指导意义。Abstract: Lailishan tin deposit, located in the eastern of Himalayas -Tethys tectonic domain and the western margin of the southern section of Sanjiang tectonic belt, is one of the most famous tin polymetallic deposits in western Yunnan. To investigate its ore genesis and provide scientific basis for the exploration and prospecting, the authors studied typomorphic characteristics of pyrite in the mining area. A large number of pyrite grew within the mineralization stages of the Lailishan tin deposit. The authors researched the infrared spectrum of pyrite through Fourier transform infrared spectrometer. The analysis results show that there were isomorphism substitutions of pyrite at different degrees and the difference between spectrogram and absorbancy of pyrite at different mineralization stages, and also show the characteristic peak shifting towards short wave from the first stage to the fourth stage. And the absorbance ratios of pyrite display the regular changes at different mineralization stages. The results above have some guiding significance for further prospecting in this area.
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1. 刘嘉钧,罗洁,岳素伟,徐亚兰. “黄蜂石”的矿物成分及谱学特征研究. 光谱学与光谱分析. 2021(06): 1936-1941 . 百度学术
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