第35卷：第9期 2015年9月
光谱学与光谱
分
析
Spectroscopy and Spectral Analysis
Vol. 35,No. 9 , pp2583-2587 September, 2015
Study on the Relationship between theDepth of SpectralAbsorption
andtheContentoftheMineralCompositionofBiotite YANG Chang-bao', ZHANG Chen-xil*, LIU Fang, JIANG Qi-gang 1. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026 , China 2. Center of Geological and Technical Information Yunnan Province, Kunming 650000, China
Abstract The mineral composition of rock is one of the main factors affecting the spectral reflectance charac-teristics, and it's an important reason for generating various rock characteristic spectra. This study choose the rock samples provided by Jet Propulsion Laboratory (JPL) (including all kinds of mineral percentage of rocks, and spectral reflectances range from 0, 35 to 2. 50 μm wavelength measured by ASD spectrometer) , and the va rious types of mineral spectral reflectances contained within the rocks are the essential data. Using the spectral linear mixture model of rocks and their minerals, firstly, a simulation study on the mixture of rock and mineral composition is achieved, the experimental results indicate that rock spectral curves using the model which based on the theory of the linear mixture are able to simulate better and preserve the absorption characteristics of various mineral components well. Then, 8 samples which contain biotite mineral are picked from the rock spectra of igneous, biotite contents and the absorption depth characteristics of spectral reflection at 2. 332 μm, furthermore, a variety of linear and nonlinear normal statistical models are used to fit the relationship between the depth of absorption spectra and the content of the mineral composition of biotite, finally, a new simulation model is build up with the Growth and the Exponential curve model, and a statistical response relationship be tween the spectral absorption depth and the rock mineral contents is simulated by using the new model, the fit ting results show that the correlation coefficient reaches 0, 998 4 and the standard deviation is 0. 572, although the standard deviation using Growth and Exponential model is less than the two model combined with the new model fitting the standard deviation, the correlation coefficient of the new model had significantly increased, which suggesting that the new model fitting effect is closer to the measured values of samples, it proves that the simulation results of new model is closer to the measured value.
Rock spectrum; mineral spectrum; Linear mixture model; The absorption depths
Keywords
中图分类号：P5；TG115.3
Introduction
文献标识码：A
Spectral characteristics of rock are mainly determined by mineral composition, the material internal crystal structure. and physical as well as chemical characteristics of it. Which affects rock spectrum mostly is the mineral composition[1-2].
Received; 2014-06-27; acepted: 2014-10-05
DOI; 10, 3964/j. issn, 1000-0593(2015)09-258305
Therefore, the study on mixed mineral spectrum of rock plays an important role in studying in mineral identification and quantitative analysis, Currently, there are many spectral mixed models, such as fuzzy segmentation models], Gaussian improved model+ and other non-linear mixed model, but as to large-scale remote sensing images, the spectral linear mixed model is more practical.
Foundation item: Major subject of science supporting plan(2006BABo1A03-1-2) ; Chinese Academy of Science, Changchun Moon-Lalce remote
sensing experiment stations open found
Biography : YANG Chang-bao, (1972—), associate professcr in Jilin University
Corresponding author
e-mail: zhangex13@mails. jlu. edu. cn