DEPARTMENT OF GEOGRAPHY, ESFAHAN UNIVERSITY, ESFAHAN, IRAN

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AKHYANI M.; KHARQANI M.; RAHIMI M.; SERESHKI F.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:94 (ENGINEERING & ENVIRONMENTAL GEOLOGY) Page(s): 107-116

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Title

DEPARTMENT OF GEOGRAPHY, ESFAHAN UNIVERSITY, ESFAHAN, IRAN

Author(s)

AKHYANI M. | KHARQANI M. | RAHIMI M. | SERESHKI F. | Issue Writer Certificate

Keywords

TORUD - CHAH SHIRIN VOLCANIC-PLUTONIC COMPLEXQ2

ALTERATIONQ2

LOGICAL ALGORITHMS OF BAND RATIOSQ2

SPECTRAL ANGLE MAPPINGQ2

CONFUSION MATRIXQ1

KAPPA COEFFICIENTQ2

Abstract

The TORUD - CHAH SHIRIN VOLCANIC-PLUTONIC COMPLEX is located in the western part of Sabzevar Metallogenic Belt and in the south of Moaleman city in the Semnan province. The presence of several mineral occurrences, especially base metal veins of epithermal origin has increased the economic importance of the magmatic complex for geological studies. The intrusion of igneous acidic to intermediate bodies in the volcanic rocks of the area has caused different alternation and mineralization in some parts of the area. In this research, various images processing methods such as false color composites (FCC), band ratios (BR) and SPECTRAL ANGLE MAPPING (SAM) were performed on ASTER L1B VNIR+SWIR dataset, for discrimination of ALTERATION zones in the Torud-Chah shirin magmatic arc. ALTERATION minerals like kaolinite, illite alunite, pyrophyllite, sericite, chlorite, epidote and calcite, which are associated with argillic, advanced argillic, phyllic and prophyllitic zones were recognized by processing aster dataset and highlighted altered area throughout the range. According to the field studies and XRD analysis, accuracy the results of SPECTRAL ANGLE MAPPING and Band Ratio Logical Operator Algorithms evaluated by CONFUSION MATRIX and KAPPA COEFFICIENT. Accuracy assessment shows an overall accuracy of 72% and 68% and a KAPPA COEFFICIENT of 0.627 and 0.6 respectively for SPECTRAL ANGLE MAPPING and Band Ratio Logical Operator Algorithms for enhancing argillic and phyllic ALTERATION zones in the study area. Therefore, the results show SPECTRAL ANGLE MAPPING method achieved better results in compared to Band Ratio Logical Operator Algorithms.

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APA: Copy

AKHYANI, M., KHARQANI, M., RAHIMI, M., & SERESHKI, F.. (2015). DEPARTMENT OF GEOGRAPHY, ESFAHAN UNIVERSITY, ESFAHAN, IRAN. GEOSCIENCES, 24(94 (ENGINEERING & ENVIRONMENTAL GEOLOGY)), 107-116. SID. https://sid.ir/paper/32603/en

Vancouver: Copy

AKHYANI M., KHARQANI M., RAHIMI M., SERESHKI F.. DEPARTMENT OF GEOGRAPHY, ESFAHAN UNIVERSITY, ESFAHAN, IRAN. GEOSCIENCES[Internet]. 2015;24(94 (ENGINEERING & ENVIRONMENTAL GEOLOGY)):107-116. Available from: https://sid.ir/paper/32603/en

IEEE: Copy

M. AKHYANI, M. KHARQANI, M. RAHIMI, and F. SERESHKI, “DEPARTMENT OF GEOGRAPHY, ESFAHAN UNIVERSITY, ESFAHAN, IRAN,” GEOSCIENCES, vol. 24, no. 94 (ENGINEERING & ENVIRONMENTAL GEOLOGY), pp. 107–116, 2015, [Online]. Available: https://sid.ir/paper/32603/en

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