Identification of hydrothermal alteration minerals applying hyperspectral methods to multispectral images
DOI:
https://doi.org/10.15381/iigeo.v20i40.14386Keywords:
Image processing, mineral mapping, remote sensing, ASTER, spectral analysis, spectral angle mapperAbstract
Advance spaceborne thermal emission and reflection radiometer (aster) is the first sensor with multi band observation in thermal infrared region (8-12 micrometers) with 90 meters of spatial resolution and 5 spectral bands specially designed to discriminate rocks from earth crust. Different process were applied in order to discriminate alteration minerals and rock groups by using not only the thermal infrared band but also the visible and near infrared bands.
The area of study is located is situated in the Department of Cuzco in the southern portion of the Peru Tertiary Volcanic Belt and located 170 kilometres northwest of Arequipa. The area lies within the Peruvian altiplano at an altitude of 4,470 to 5,370 metres. The availability of multispectral data from the satellite- borne ASTER (advance Spaceborne Thermal emission Reflection Radiometer) instrument has provided and increased potential for mapping hydrothermal alteration systems.
The ASTER instrument has six bands in the Swir region strategically positioned to map distinctive absorption features of alteration minerals with Al- OH and Mg-OH bonds. That permits to interact with the Terra Spec.
Downloads
Published
Issue
Section
License
Copyright (c) 2017 Néstor Chacón Abad, Santiago Mayor Pastor
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
AUTHORS RETAIN THEIR RIGHTS:
a. Authors retain their trade mark rights and patent, and also on any process or procedure described in the article.
b. Authors retain their right to share, copy, distribute, perform and publicly communicate their article (eg, to place their article in an institutional repository or publish it in a book), with an acknowledgment of its initial publication in the Rev. Inst. investig. Fac. minas metal cienc. geogr.
c. Authors retain theirs right to make a subsequent publication of their work, to use the article or any part thereof (eg a compilation of his papers, lecture notes, thesis, or a book), always indicating the source of publication (the originator of the work, journal, volume, number and date).
