Application of Short-Wave Infrared Spectroscopy in Gangjiang Porphyry Cu-Mo Deposit in Nimu Ore Field, Tibet

被引：10
|
作者：
Tian F. [1 ,2 ]
Leng C. [1 ]
Zhang X. [1 ]
Tian Z. [1 ,2 ]
Zhang W. [1 ]
Guo J. [1 ,2 ]
机构：
[1] State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry Chinese Academy of Sciences, Guiyang
[2] University of Chinese Academy of Sciences, Beijing
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2019年 / 44卷 / 06期
关键词：
Deposits; Gangjiang porphyry Cu-Mo deposit; Geology; Sericite; Short-wave infrared spectroscopy (SWIR); Wall rock alteration;
D O I：
10.3799/dqkx.2018.373
中图分类号：
学科分类号：
摘要：
In order to reveal the alteration and mineralization structure of the Gangjiang porphyry copper-molybdenum deposit, the short-wave infrared spectroscopy (SWIR) technique was systematically used to analyze the four drill-holes in the typical section of the deposit. Five types of altered mineral groups were detected, i.e. sericite, kaolinite, chlorite, sulphate and carbonate. Short-wave infrared spectroscopy results of sericite show that there is a greater illite crystallinity (≥ 1.5) and a smaller sericite Al-OH absorption position (≤ 2 205 nm) towards the ore body. However, the value of illite crystallinity and sericite Al-OH absorption position distal the ore body are 0.8-1.2 and 2 207-2 209 nm, respectively. In addition, the iron oxide intensity value is synchronized oxidized ore body. It is indicated that these characteristic parameters of short-wave infrared spectroscopy are helpful to the understanding of the alteration and mineralization structure of the Gangjiang porphyry Cu-Mo deposit, which may effectively restrict the ore-forming fluid condition and provide a potential prospecting indicator for the target mine and other similar mining areas. © 2019, Editorial Department of Earth Science. All right reserved.
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页码：2143 / 2154
页数：11
相关论文
共 31 条
  • [1] Chang Z., Yang Z., Evaluation of Inter-Instrument Variations among Short Wavelength Infrared (SWIR) Devices, Economic Geology, 107, 7, pp. 1479-1488, (2012)
  • [2] Chang Z.S., Hedenquist J.W., White N.C., Et al., Exploration Tools for Linked Porphyry and Epithermal Deposits: Example from the Mankayan Intrusion-Centered Cu-Au District, Luzon, Philippines, Economic Geology, 106, 8, pp. 1365-1398, (2011)
  • [3] Chen S.B., Huang B.Q., Li C., Et al., Alteration and Mineralization of the Yuhai Cu Deposit in Eastern Tianshan, Xinjiang and Applications of Short Wavelength Infra-Red (SWIR) in Exploration, Earth Science, 43, 9, pp. 2911-2928, (2018)
  • [4] Clark R.N., King T.V.V., Klejwa M., Et al., High Spectral Resolution Reflectance Spectroscopy of Minerals, Journal of Geophysical Research, 95, B8, pp. 12653-12680, (1990)
  • [5] Duke E.F., Near Infrared Spectra of Muscovite, Tschermak Substitution, and Metamorphic Reaction Progress: Implications for Remote Sensing, Geology, 22, 7, (1994)
  • [6] Guo N., Thomas C., Tang J.X., Et al., Mapping White Mica Alteration Associated with the Jiama Porphyry-Skarn Cu Deposit, Central Tibet Using Field SWIR Spectrometry, Ore Geology Reviews, (2017)
  • [7] Halley S., Dilles J.H., Tosdal R.M., Footprints: Hydrothermal Alteration and Geochemical Dispersion around Porphyry Copper Deposits, SEG Newsletter, 100, pp. 11-17, (2015)
  • [8] Herrmann W., Blake M., Doyle M., Et al., Short Wavelength Infrared (SWIR) Spectral Analysis of Hydrothermal Alteration Zones Associated with Base Metal Sulfide Deposits at Rosebery and Western Tharsis, Tasmania, and Highway-Reward, Queensland, Economic Geology, 96, 5, pp. 939-955, (2001)
  • [9] Hou Z.Q., Yang Z.M., Qu X.M., Et al., The Miocene Gangdese Porphyry Copper Belt Generated during Post-Collisional Extension in the Tibetan Orogen, Ore Geology Reviews, 36, 1-3, pp. 25-51, (2009)
  • [10] Hunt G.R., Spectral Signatures of Particulate Minerals in the Visible and near Infrared, Geophysics, 42, 3, pp. 501-513, (1977)
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