Different Types of Deposits in Porphyry Metallogenic System Identified by 2 200 nm Al-OH Group Vibration

doi:10.3964/j.issn.1000-0593(2023)11-3483-09

	Different Types of Deposits in Porphyry Metallogenic System Identified by 2 200 nm Al-OH Group Vibration
	Guo, Na1,2 ; Wang, Xin-Chen3
	2023-11
发表期刊	Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
卷号	43 期号:11 页码:3492-3496
摘要	2 200 nm Al-OH group vibration is important for the exploration of the deposit in the porphyry metallogenic system. ASD portable spectrometer was used to measure 15 core samples form three different deposit types: Tiegelongnan High- sulfide epithermal deposit, Jiama porphyry deposit and Sinongduo low- sulfide epithermal deposit in Tibet. The results show that; (1) the overall spectral reflectance is 45%~70% in Tiegelongnan, 38%~58% in Jiama and 27%~56% in Sinongduo, the spectral difference is 5~15%; (2) high- sulfide epithermal deposit show a double peak at 2 200 nm, and the other two types show single peak; (3) the spectrum of low- sulfide epithermal deposit enhanced by the second derivative is negative at 2 200 nm, the spectral symmetry and absorption index are also lower than the others; (4) The gaussamp function takes excellent fitting on the single peak spectrum at 2 200 nm (i?2 = l) , which can completely simulate white mica group minerals. The above analysis shows that the 2 200 nm Al-OH group vibration can obviously distinguish different deposits in the porphyry metallogenic system. On the one hand, the presence of illite-smectite in low-sulfide epithermal deposit lead to low reflectance, and the water in minerals result in low values of spectral symmetry and absorption index; On the other hand, the average spectral curve of high-sulfide epithermal deposit takes double peaks because of the kaolinite and dickite minerals, which is the mark for the identification of different epithermal deposits. The study can be applied to aerospace hyperspectral remote sensing exploration by using a 2 200 nm single band. © 2023 Science Press. All rights reserved.
关键词	Absorption spectroscopy Aluminum compounds Curve fitting Deposits Kaolinite Mica Reflection Remote sensing Sulfur compounds Vibration analysis 2 200 nm Absorption indexes Al-OH group vibration Double peak Epithermal deposits Low sulphides OH-groups Porphyry metallogenic system Single peak Spectra's
DOI	10.3964/j.issn.1000-0593(2023)11-3483-09
收录类别	EI
ISSN	1000-0593
语种	中文
出版者	Science Press
EI入藏号	20234715075059
EI主题词	Water absorption
EI分类号	482.2 Minerals ; 802.3 Chemical Operations ; 921.6 Numerical Methods
原始文献类型	Journal article (JA)
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/35657
专题	工商管理学院信息工程与人工智能学院
通讯作者	Wang, Xin-Chen
作者单位	1.Earth Science College, Chengdu University of Technology, Chengdu; 610059, China; 2.Geomathematics Key Laboratory of Sichuan Province (Chengdu University of Technology), Chengdu; 610059, China; 3.College of Information Engineering, Lanzhou University of Finance and Economics, Lanzhou; 730020, China
通讯作者单位	兰州财经大学
推荐引用方式 GB/T 7714	Guo, Na,Wang, Xin-Chen. Different Types of Deposits in Porphyry Metallogenic System Identified by 2 200 nm Al-OH Group Vibration[J]. Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis,2023,43(11):3492-3496.
APA	Guo, Na,&Wang, Xin-Chen.(2023).Different Types of Deposits in Porphyry Metallogenic System Identified by 2 200 nm Al-OH Group Vibration.Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis,43(11),3492-3496.
MLA	Guo, Na,et al."Different Types of Deposits in Porphyry Metallogenic System Identified by 2 200 nm Al-OH Group Vibration".Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis 43.11(2023):3492-3496.