Hyperspectral Prospecting Enlightenment of the Luobu Mineralization Site in Tibet
DAI Jing-jing1, 2*, LIU Zhi-bo2*, BAI Long-yang2, SONG Yang1, 2, WANG Nan2, CHEN Wei1, 2, YUAN Chang-jiang3
1. State Key Laboratory of Deep Earth and Mineral Exploration, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100094, China
2. MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
3. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Abstract：The Gangdise Metallogenic Belt is one of the important copper polymetallic metallogenic belts in Tibet, which develops multi-stage key mineralization events and is characterized by a collisional environment porphyry copper-polymetallic deposits. The research initially reveals the potential of prospecting in the Luobu area based on satellite hyperspectral Gaofen-5 technology. Grid sampling on the surface was carried out for short-wave infrared measurement and refined alteration mapping by ground hyperspectral technology and X-ray fluorescence spectrum, which could contribute to revealing the deep prospecting direction in the Luobu area. The research findings are as follows: (1) The result of satellite hyperspectral shows that the Luobu area is mainly characterized by large-scale advanced argillaceous alteration, which indicates its potential for prospecting porphyry-high-sulfur epithermal deposits. (2) The surface alteration minerals assemblage in Luobu shows five types, including pyrophyllite-disapore-dickite, alunite-kaolinite-muscovite, muscovite-kaolinite-dickite, chlorite-kaolinite, and carbonate alteration; (3) The shift of the diagnostic characteristic peak position of Al-OH in alunite and the crystallinity of white mica group minerals can indicate the changes with the temperature, pressure, and acidity-alkalinity of ore-forming fluid, and then indicate the direction of the hydrothermal center. The comprehensive results of -the geological background, the short-wavelength infrared spectrum of altered minerals, and the superposition of X-ray fluorescence spectrum anomalies have revealed two potential areas for searching for a hydrothermal center in Luobu, which can provide theoretical references for subsequent deep exploration.
代晶晶，刘治博，白龙洋，宋 扬，王 楠，陈 伟，袁长江. 西藏罗布矿化点高光谱勘查启示[J]. 光谱学与光谱分析, 2025, 45(10): 2849-2855.
DAI Jing-jing, LIU Zhi-bo, BAI Long-yang, SONG Yang, WANG Nan, CHEN Wei, YUAN Chang-jiang. Hyperspectral Prospecting Enlightenment of the Luobu Mineralization Site in Tibet. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(10): 2849-2855.
[1] Zheng Y Y, Duo J, Gao S B, et al. Frontiers of Earth Science in China, 2007, 1(2): 226.
[2] DONG Guo-chen, MO Xuan-xue, ZHAO Zhi-dan, et al(董国臣, 莫宣学, 赵志丹, 等). Sedimentary Geology and Tethyan Geology(沉积与特提斯地质), 2021, 41(2): 332.
[3] TANG Ju-xing, WANG Li-qiang, WANG Guo-zhi, et al(唐菊兴, 王立强, 王国芝, 等). Geology in China(中国地质), 2017, 44(S1): 64.
[4] LIU Zhi-bo, TANG Ju-xing, LI Zhi-jun, et al(刘治博, 唐菊兴, 李志军, 等). Geology in China(中国地质), 2023, 50(3): 967.
[5] WANG Run-sheng, GAN Fu-ping, YAN Bai-kun, et al(王润生, 甘甫平, 闫柏琨, 等). Remote Sensing for Natural Resources(自然资源遥感), 2010, 1: 1.
[6] Bedini E, Chen J. Journal of Hyperspectral Remote Sensing, 2020, 10(2): 87.
[7] Dai J J, Zhao L X, Lin B, et al. Ore Geology Reviews, 2023, 157: 105437.
[8] Yao F, Liu S, Wang D, et al. Ore Geology Reviews, 2023, 162: 105732.
[9] CHEN Hua-yong, ZHANG Shi-tao, CHU Gao-bin, et al(陈华勇, 张世涛, 初高彬, 等). Acta Petrologica Sinica(岩石学报), 2019, 35(12): 3629.
[10] Dalm M, Buxton M W N, van Ruitenbeek F J A. Minerals Engineering, 2017, 105: 10.
[11] DAI Jing-jing, WANG Run-sheng(代晶晶, 王润生). Geological Science and Technology Information(地质科技情报), 2013, 32(2): 8.
[12] TIAN Feng, LENG Cheng-biao, ZHANG Xing-chun, et al(田 丰, 冷成彪, 张兴春, 等). Earth Science(地球科学), 2019, 44(6): 2143.
[13] MAO Xing-xing, PENG Hui-juan, ZHANG Yun-long, et al(毛星星, 彭惠娟, 张云龙, 等). Mineral Deposits(矿床地质), 42(3): 646.
[14] Halley S, Dilles J H, Tosdal R M. SEG Discovery, 2015, 100: 1.
[15] Wang R, Cudahy T, Laukamp C. Economic Geology, 2017, 112(5): 1153.
[16] YANG Zhi-ming, HOU Zeng-qian, YANG Zhu-sen, et al(杨志明, 侯增谦, 杨竹森, 等). Mineral Deposits(矿床地质), 2012, 31(4): 699.
[17] Meyer J M, Kokaly R F, Holley E. Remote Sensing of Environment, 2022, 275: 113000.
[18] Chang Z S, Hedenquist J W, White N C, et al. Economic Geology, 2011, 106(8): 1365.
[19] Sillitoe R H. Geological Association of Canada Special, 1993, 40: 403.
[20] Thompson A J B, Hauff P L, Robitaille A J. SEG Discovery, 1999, 39: 1.
