Application of the Crosta technique for alteration mapping of granitoidic rocks using ETM+ data: case study from eastern Tauride belt (SE Turkey)

Aydal, Doğan; Arda, E.; Dumanlılar, Özcan

doi:10.1080/01431160601105926

Cited by 48 publications

(25 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The technique deployed was coined to the originator, thus the term 'Crosta technique' is often used. Several researchers applied the Crosta method of selective PC analysis for mapping of granitoids (Kalelioglu et al, 2009;Aydal et al, 2007) and alteration systems (Tangestani and Moore, 2001;Ranjbar et al, 2004). Selective PC analysis using two spectral bands has resulted in ferric iron images (using PC2 on Landsat TM band 1 and 3) and hydroxyl images (using PC2 on Landsat TM band 5 and 7 (Chavez and Kwarteng, 1989).…”

Section: Multispectral: the Landsat Eramentioning

confidence: 99%

Multi- and hyperspectral geologic remote sensing: A review

van der Meer,

van der Werff,

van Ruitenbeek

et al. 2012

International Journal of Applied Earth Observation and Geoinfor

868

370

View full text Add to dashboard Cite

Section: Multispectral: the Landsat Eramentioning

confidence: 99%

Multi- and hyperspectral geologic remote sensing: A review

van der Meer,

van der Werff,

van Ruitenbeek

et al. 2012

International Journal of Applied Earth Observation and Geoinfor

868

370

View full text Add to dashboard Cite

“…Second, for the selected region with small intrusions identified, PCA and HSI color model transformation methods were used to process Quickbird data to delineate the details of small intrusions and find other unknown similar intrusions nearby. Third, the alteration minerals were mapped using the Crosta technique [7,9,19], a principal component analysis-based method using the association of bands 1, 4, 5, and 7 for extracting hydroxyl-bearing and carbonate minerals and that of bands 1, 3, 4, and 5 for iron oxides. In targeting new mineralization prospects, the existing geological controls (as derived from the geological map) of the study area were overlapped with the remote sensing results obtained herein.…”

Section: Methodsmentioning

confidence: 99%

“…The Crosta technique is also known as a feature-oriented principal component selection, which has been widely used in mineral exploration to identify the diagnostic features of hydroxyl minerals, carbonate bearing minerals and iron oxides [7,9,19,22].…”

Section: Alteration Mineral Mappingmentioning

confidence: 99%

“…Remote sensing has been extensively used for lithological mapping and mineral exploration [6][7][8][9][10][11][12][13][14][15][16][17][18]. The multispectral data of the Landsat Thematic Mapper (TM) and the Enhanced Thematic Mapper (ETM+) have been the most commonly used data sources for geologic applications in the past three decades with promising results [7,[16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Targeting Mineral Resources with Remote Sensing and Field Data in the Xiemisitai Area, West Junggar, Xinjiang, China

et al. 2013

View full text Add to dashboard Cite

Abstract:The Xiemisitai area, West Junggar, Xinjiang, China, is situated at a potential copper mineralization zone in association with small granitic intrusions. In order to identify the alteration zones and mineralization characteristics of the intrusions, Landsat Enhanced Thematic Mapper (ETM+) and Quickbird data of the study area were evaluated in mapping lithological units, small intrusions, and alteration zones. False color composites of the first principal component analyses (PCA1), PCA2, and PCA4 in red (R), green (G), and blue (B) of the ETM+ image, and relevant hue-saturation-intensity (HSI) color model transformations, were performed. This led to the identification of lithologic units and discrimination of granitic intrusions from wall-rocks. A new geological map was generated by integrating the remote sensing results with two internally published local geologic maps and field inspection data. For the selected region, false color composites from PCA and relevant HSI-transformed images of the Quickbird data delineated the details of small intrusions and identified other unknown similar intrusions nearby. Fifteen separate potash-feldspar granites and three separate hornblende biotite granites were identified using ETM+ and Quickbird data. The principal component analysis-based Crosta technique was employed to discriminate alteration minerals. Some of the mapped alteration zones OPEN ACCESS Remote Sens. 2013, 5 3157 using the Crosta technique agreed very well with the known copper deposits. Field verification led to the discovery of three copper mineralizations and two gold mineralizations for the first time. The results show that the PCA and HSI transformation techniques proved to be robust in processing remote sensing data with moderate to high spatial resolutions. It is concluded that the utilized methods are useful for mapping lithology and the targeting of small intrusion-type mineral resources within the sparsely vegetated regions of Northwest China.

show abstract

“…The Enhanced Thematic Mapper Plus (ETM+) is a satellite instrument that gathers multi-spectral remote sensing data free of charge, and these data are widely used in geological studies [13,14]. Previous studies have proposed several methods and algorithms to identify alteration and lithology using the ETM+ [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China

Qiu

Zhang

Hu³

2015

Remote Sensing

View full text Add to dashboard Cite

Abstract:The high-grade uranium deposits in the Xiemisitan area, northwestern China, are genetically associated with the faulting of felsic volcanic or sub-volcanic rocks. Ferric iron alteration indicates that oxidizing hydrothermal fluids percolated through the rocks. In this study, we measured the gamma-ray intensities of rocks in the Xiemisitan area and we propose a hybrid method for the mapping of ferric iron alteration using concentration-area fractal modeling and spectral angle mapper. The method enables ferric iron alteration to be distinguished from potash-feldspar granitic rocks. The mapping results were integrated with structural data to assist with exploration for uranium in the study area. Using this approach, six prospective areas of mineralization were proposed. Of these areas, two anomalies with high gamma-ray intensities of 104 and 650 Uγ were identified and verified by field inspection. These observations suggest that Enhanced Thematic Mapper Plus images are a valuable tool that can improve the efficiency of uranium exploration.

show abstract

Application of the Crosta technique for alteration mapping of granitoidic rocks using ETM+ data: case study from eastern Tauride belt (SE Turkey)

Cited by 48 publications

References 8 publications

Multi- and hyperspectral geologic remote sensing: A review

Multi- and hyperspectral geologic remote sensing: A review

Targeting Mineral Resources with Remote Sensing and Field Data in the Xiemisitai Area, West Junggar, Xinjiang, China

Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China

Contact Info

Product

Resources

About