气候变化领域集成服务门户(CCPortal): Thermal infrared spectroscopy studies on skarn minerals for exploration of the Jiama Cu-Mo deposit, Tibet, China

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DOI	10.1016/j.oregeorev.2023.105437
	Thermal infrared spectroscopy studies on skarn minerals for exploration of the Jiama Cu-Mo deposit, Tibet, China
	Dai, Jingjing; Zhao, Longxian; Lin, Bin; Tang, Pan; Fu, Minghai
发表日期	2023
ISSN	0169-1368
EISSN	1872-7360
卷号	157
英文摘要	The zonation patterns of skarn minerals, including garnet, diopside, and wollastonite, are important for exploration of skarn deposits. Thermal infrared (TIR) spectroscopy, which covers the wavelength range of 6-14 mu m, is a new eco-friendly technology for skarn mineral identification. In this study, the TIR spectra data were collected, using an Agilent 4300 Handheld FTIR Spectrometer from nine drill holes within Jiama Cu-Mo deposit in Tibet, China. This study focuses on the TIR characteristics of grandite-series garnets (i.e., grossular to andradite), which have twin peaks in the 10-13 mu m range and a diagnostic absorption valley (T absorption valley) at around 11.5 mu m shifting based on the contents of Al2O3 and Fe2O3. The T absorption valley in the zoned garnet sample showed an undulating pattern, shifting towards longer wavelengths from the core to the rim, indicating the increase in Fe2O3 content and a decrease in Al2O3, MnO, and TiO2 content. The mixed spectral features of three significant skarn minerals including garnet, diopside, and wollastonite were used to classify the skarn zonation into garnet skarns, diopside-garnet skarns, and wollastonite-garnet skarns. The results from nine drill holes of the No. 24 exploration line in the cross section showed that the garnet T absorption valley shifted towards shorter wavelengths from the proximal to the distal skarn, as well as from the lower to the upper skarn. Furthermore, intensive copper mineralization occurred in the skarn when the garnet T absorption valley exceeded 11.50 mu m. In comparison, the garnet T absorption valley at 11.35-11.50 mu m is related to more intense molybdenum mineralization. This study suggests that TIR spectroscopy has the potential to rapidly identify skarn zonation in the field, and providing a suitable vector tool for skarn ore exploration.
关键词	Thermal infrared spectroscopy Skarn minerals Garnet Jiama deposit Agilent 4300 Handheld FTIR Spectrometer
英文关键词	REFLECTANCE SPECTROSCOPY; COPPER-DEPOSIT; WHITE MICA; PORPHYRY; MINERALIZATION; DAM; ENVIRONMENT; CHEMISTRY; YERINGTON; DISTRICT
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:001001402000001
来源期刊	ORE GEOLOGY REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283223
作者单位	China Geological Survey; Chinese Academy of Geological Sciences; Ministry of Natural Resources of the People's Republic of China; Southwest University of Science & Technology - China
推荐引用方式 GB/T 7714	Dai, Jingjing,Zhao, Longxian,Lin, Bin,et al. Thermal infrared spectroscopy studies on skarn minerals for exploration of the Jiama Cu-Mo deposit, Tibet, China[J],2023,157.
APA	Dai, Jingjing,Zhao, Longxian,Lin, Bin,Tang, Pan,&Fu, Minghai.(2023).Thermal infrared spectroscopy studies on skarn minerals for exploration of the Jiama Cu-Mo deposit, Tibet, China.ORE GEOLOGY REVIEWS,157.
MLA	Dai, Jingjing,et al."Thermal infrared spectroscopy studies on skarn minerals for exploration of the Jiama Cu-Mo deposit, Tibet, China".ORE GEOLOGY REVIEWS 157(2023).