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)11-3492-05

	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	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%similar to 70% in Tiegelongnan, 38%similar to 58% in Jiama and 27%similar to 56% in Sinongduo, the spectral difference is 5 similar to 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 (R-2=1), 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.
关键词	2 200 nm Al-OH group vibration Porphyry metallogenic system Epithermal deposits Minerals
DOI	10.3964/j.issn.1000-0593(2023)11-3492-05
收录类别	SCIE
ISSN	1000-0593
语种	中文
WOS研究方向	Spectroscopy
WOS类目	Spectroscopy
WOS记录号	WOS:001095634400023
出版者	OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
原始文献类型	Article
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/35472
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.Chengdu Univ Technol, Earth Sci Coll, Chengdu 610059, Peoples R China; 2.Chengdu Univ Technol, Geomathemat Key Lab Sichuan Prov, Chengdu 610059, Peoples R China; 3.Lanzhou Univ Finance & Econ, Coll Informat Engn, Lanzhou 730020, Peoples R 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]. 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.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".SPECTROSCOPY AND SPECTRAL ANALYSIS 43.11(2023):3492-3496.