钻孔岩心红外光谱-便携式XRF-磁化率测试在攀西太和钒钛磁铁矿床勘查中的应用

近年来,红外光谱技术因其可以绿色、快速、无损、精确探测矿物和提高勘查效率而备受关注.攀西超大型太和钒钛磁铁矿床位于镁铁质-超镁铁质层状岩体中,该矿床的典型矿物的红外光谱特征研究相对缺乏,制约了勘查效率的提高.本文应用便携式傅里叶变换红外光谱仪对四川太和钒钛磁铁矿床钻孔ZK1307岩心开展热红外光谱测试工作,并辅以便携式...

Infrared Spectroscopy, Portable XRF and Magnetic Susceptibility Analysis of Drill Core for Exploration of the Taihe Vanadium Titano-Magnetite Deposit in the Panxi Area, Sichuan Province

BACKGROUND: The Panxi super large-scale Taihe vanadium-titanium magnetite deposit is located in the mafic-ultramafic layered intrusions. Research on the characteristics of infrared spectroscopy of the typical minerals of this deposit is relatively lacking, restricting exploration efficiency. The Panxi area would benefit from the use of infrared spectroscopy technology, which in recent years has attracted much attention because of its green, fast, non-destructive and accurate detection of minerals, and improvement of exploration efficiency.OBJECTIVES: To analyze the characteristics of different minerals and to efficiently identify ore-bearing intrusions and mineralized regions in the Taihe vanadium titano-magnetite deposit in the Panxi area, Sichuan Province.METHODS: Minerals were identified using Handheld FTIR through thermal infrared (TIR). The contents of Fe, Ti, and V were analyzed by Vanta VMW portable XRF. The magnetic susceptibility was analyzed by KM-7 portable magnetic susceptibility tester. Based on the core catalog, the relationship between borehole lithology, mineral assemblage, element content, and magnetic susceptibility value was studied.RESULTS: TIR can be used to achieve rapid and non-destructive extraction of the characteristic absorption peaks of pyroxene, identify the distribution of magnetite-bearing pyroxenite, and quickly define ore-bearing rock masses. The contents of Fe, Ti, and V in the Taihe deposit can be linearly fitted by magnetic susceptibility values. Different kinds of rocks and ores have different contents of Fe, Ti, V and magnetic susceptibility value.CONCLUSIONS: TIR technology is useful for prospecting magnetite-bearing rocks or deposits in unknown areas. The higher contents of Fe, Ti, and V and magnetic susceptibility values can be used as indicative information for judging the mineralization of geological bodies.