Hyperspectral mapping for rock and alteration mineral with Spectral Angle Mapping and Neural Network classification method: Study case in Warmbad district, south of Namibia

Author

Arvelyna, Yessy ; Shuichi, Miyatake ; Atsushi, Momose ; Nguno, Anna ; Mhopjeni, Kombadayedu ; Muyongo, Aphary ; Sibeso, Minsozi ; Muvangua, Ewereth

Author_Institution

Japan Oil Gas, & Metals Nat. Corp. (JOGMEC), Tokyo, Japan

fYear

2011

fDate

24-29 July 2011

Firstpage

1752

Lastpage

1754

Abstract

This study observed rock and alteration mineral mapping using HyMap hyperspectral data over the Warmbad district, south of Namibia. The classification result using proposed methods consist of PPI derived from the Spectral Hourglass method and field spectra with the Neural Network classification method show good result for mapping various sericites in pegmatite veins, propylitic alteration of chlorite and epidote, and amphibole in mafic and ultra mafic rock of gabbro, gabbro norite, which are mostly observed in the Warmbad district.

Keywords

geophysical image processing; image classification; minerals; neural nets; rocks; terrain mapping; HyMap hyperspectral data; South of Namibia; Spectral Hourglass method; Warmbad District; alteration mineral; amphibole; chlorite; epidote; gabbro norite; hyperspectral mapping; neural network classification method; pegmatite veins; propylitic alteration; rock; sericites; spectral angle mapping; Absorption; Hyperspectral imaging; Image color analysis; Mineralization; Rocks; Hyperspectral imaging; geology; minerals;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International

Conference_Location

Vancouver, BC

ISSN

2153-6996

Print_ISBN

978-1-4577-1003-2

Type

conf

DOI

10.1109/IGARSS.2011.6049458

Filename

6049458