|
|
|
|
|
|
| Different Types of Deposits in Porphyry Metallogenic System Identified by 2 200 nm Al—OH Group Vibration |
| GUO Na1, 2, WANG Xin-chen3* |
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
|
|
|
|
|
Abstract 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 (R2=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.
|
|
Received: 2022-05-29
Accepted: 2022-09-29
|
|
|
|
Corresponding Authors:
WANG Xin-chen
E-mail: wsh617@qq.com
|
|
[1] GAN Fu-ping, XIONG Sheng-qing, WANG Run-sheng, et al(甘甫平，熊盛青，王润生，等). Minerals Mapping and Application by Hyperspectral Techniques(高光谱矿物填图与示范应用). Beijing: Science Press(北京：科学出版社)，2015. 17.
[2] Wang R, Cudahy T, Laukamp C，et al. Economic Geology, 2017, 112(5): 1153.
[3] Guo N, Thomas C, Tang J X, et al. Ore Geology Reviews, 2019，108: 147.
[4] GUO Na, SHI Wei-xin, HUANG Yi-ru, et al(郭 娜，史维鑫，黄一入, 等). Geological Bulletin of China(地质通报)，2018, 37（2-3）：446.
[5] Laakso K, Peter J-M, Rivard B，et al. Economic Geology, 2016, 111: 1223.
[6] Halley S, Dilles J H, Tosdal R M. SEG Newsletter, 2015, (100)：12.
[7] Ross P-S, Bourke A, Schnitzler N，et al. Economic Geology, 2019, 114(4): 613.
[8] DENG Yong-kang, CAO Jian-jin, DANG Wan-qiang, et al(邓永康，曹建劲，党万强，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2019, 39(9): 2929.
|
| [1] |
CHENG Jia-wei1, 2，LIU Xin-xing1, 2*，ZHANG Juan1, 2. Application of Infrared Spectroscopy in Exploration of Mineral Deposits: A Review[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 15-21. |
| [2] |
LIU Shu-hong1, 2, WANG Lu-si3*, WANG Li-sheng3, KANG Zhi-juan1, 2，WANG Lei1, 2，XU Lin1, 2，LIU Ai-qin1, 2. A Spectroscopic Study of Secondary Minerals on the Epidermis of Hetian Jade Pebbles From Xinjiang, China[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 169-175. |
| [3] |
WAN Huang-xu1, 2, LIU Ji-qiang1*, HAN Xi-qiu1, 2, LIANG Jin-long2, ZHOU Ya-dong1, FAN Wei-jia1, WANG Ye-jian1, QIU Zhong-yan1, MENG Fan-wei3. Ultrastructure and Mineral Composition of Bathymodiolus Shell From Wocan-1 Hydrothermal Vent, Northwest Indian Ocean[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(11): 3497-3503. |
| [4] |
XU Ya-fen1, LIU Xian-yu1*, CHEN Quan-li2, XU Chang3. Study on Mineral Composition and Spectral Characteristics of “Middle East Turquoise”[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(09): 2862-2867. |
| [5] |
YU Lian-gang1, LIU Xian-yu2*, CHEN Quan-li3. Gemstone Mineralogical and Spectroscopic Characteristics of
Quartzose Jade (“Mianlv Yu”)[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(08): 2543-2549. |
| [6] |
CAO Miao-cong1, CHEN Tao2*, QIN Hong-yu1, LIU Rui1, ZHANG Hai-jun3, GU Zhong-yuan1. The Spectra and Mineralogy Study of Changbai Colored Jade[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(07): 2202-2209. |
| [7] |
ZHANG Li-qian1, 2, LIU Yang-jie2, 3, LIN Bing-lan2, DUAN Jun1. Comparative Study on Mineralogical Identification and Spectral
Characteristics of Halloysitum Album, a Commercial Mineral
Medicine[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(03): 897-902. |
| [8] |
XIA Tong, LIU Yi-wei, GAO Yuan, CHENG Jie*, YIN Jian. Model-Fitting Methods for Mineral Raman Spectra Classification[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(02): 583-589. |
| [9] |
FU Ming-hai1, 2, DAI Jing-jing1*, WANG Xian-guang3, HU Zheng-hua4, PENG Bo1, WAN Xin3, ZHANG Zhong-xue2, ZHAO Long-xian1, 2. A Study on the Thermal Infrared Spectroscopy Characteristics of the Skarn Minerals in Zhuxi Tungsten Deposit, Jiangxi Province[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(01): 70-77. |
| [10] |
ZHAO Jian-ming, YANG Chang-bao, HAN Li-guo*, ZHU Meng-yao. The Inversion of Muscovite Content Based on Spectral Absorption
Characteristics of Rocks[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(01): 220-224. |
| [11] |
ZHANG Li-qian1, 2, LIU Yang-jie2, 3. Comparative Study on Mineralogical Identification and Spectral
Characteristics of Four Iron-Containing Mineral Medicines[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(09): 2884-2889. |
| [12] |
LUO Jie1, 2, YUE Su-wei1, 2*, GUO Hong-ying1, LIU Jia-jun3. Spectroscopic Characteristics and Coloring Mechanism of Smithsonite
Jade[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1886-1890. |
| [13] |
TIAN Qing-lin1, GUO Bang-jie1, YE Fa-wang1, LI Yao2, LIU Peng-fei1, CHEN Xue-jiao1. Mineral Spectra Classification Based on One-Dimensional Dilated Convolutional Neural Network[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(03): 873-877. |
| [14] |
LIU Ting-yue1, DAI Jing-jing2*, TIAN Shu-fang1. A Neural Network Recognition Method for Garnets Subclass Based on Hyper Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(06): 1758-1763. |
| [15] |
CHEN Qian, CHEN Tao*, XU Xing, KANG Bin-yan, ZHENG Jin-yu, LI Meng-yang. Gemmological and Spectroscopic Studies of the Jade Looked Like “Frozen Matrix” Chicken-Blood Stone[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(06): 1920-1924. |
|
|
|
|
