Mineral Explorations by Landsat Image Ratios

Imbroane, A.; Melenti, C.; Gorgan, Dorian

doi:10.1109/synasc.2007.52

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Addition to Vegetation indices and mineral indices hydrothermal altered zones was identified using multispectral image Landsat8 to detect the hydrothermally altered minerals namely clay(hydroxide), carbonate, ferrous and ferric minerals using ENVI Classic 5.3. Hydrothermal alteration is caused due invasion of hot fluids in the host rock and interact with it resulting to change in chemical composition and as the fluids cools, they get precipitate and also tend to change the lithology of the host rock by hydrothermal alteration (Imbroane et al, 2007). Several RGB combinations and Band ratios was created for Landsat 8 images based on the laboratory spectra.…”

Section: Hydrothermal Alterationmentioning

confidence: 99%

Mapping potential hydrocarbon sites in Upper Assam shelf using geospatial and geo-structural techniques

Ashish Aggarwal, Devesh Rajendra Umredkar, Nirlipta Nayak

2023

tjjpt

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Remote Sensing and Spatial analysis tools are used to identify the hydrocarbon prospective zones as subsurface hydrocarbon traps are not perfectly sealed and moves in the upward direction from the reservoir to the surface in the form of traces and alter the vegetation which can be recognized through several techniques. Landsat-8 OLI and Sentinel 2A satellite images were used and spectral signatures such as Mineral Indices, Vegetation Index, Hydrothermal Alteration were analyzed to detect possible hydrocarbon sites in the study area. Mineral Indices namely clay carbonate, ferrous, and ferric indices were used to confirm and locate the hydrocarbon zones which is directly related to the detection of hydrocarbon micro seepage on the surface. Vegetation indices such as NDVI, GNDVI, SAVI, and Chlorophyll Index Green were investigated to narrow down the prospective areas, indicating chemical alteration in the soil and vegetation, giving an idea about the hydrocarbon prospective zones. Magnetic and gravity data were also collected to correlate these findings which shown anomalies in the study area and gave evidence for the prospect of hydrocarbon. Lineament extraction was performed to delineate the micro seepage zones in the study area. After combining all the data, the prospective zones of hydrocarbon and micro seepage in Upper Assam Shelf were located. Furthermore, a comparison study was conducted to identify prospective areas from analyzing both Sentinel 2A and Landsat 8 images. The results of the study demonstrated the effectiveness of remote sensing and spatial analysis tools in identifying hydrocarbon prospective areas in the region.

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Section: Hydrothermal Alterationmentioning

confidence: 99%

Mapping potential hydrocarbon sites in Upper Assam shelf using geospatial and geo-structural techniques

Ashish Aggarwal, Devesh Rajendra Umredkar, Nirlipta Nayak

2023

tjjpt

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“…At first, iron oxides BRs 3/1 and 4/2 for Landsat TM/ETM+ and OLI8, respectively, were applied in order to highlight iron oxides by the presence of bright pixels (Sabins, 1999). The iron oxides BR is useful for detecting ferric iron (Fe 3+ ) oxides such as hematite and goethite (Imbroane et al, 2007;Hung, 2013;Pour et al, 2019;Rockwell, 2013;Soe et al, 2005;Traore et al, 2020). At second, the BRs 5/7 and 6/7 for Landsat TM/ETM+ and OLI8, respectively, were applied in order to highlight hydroxyl-bearing minerals such as clay minerals (kaolinite, montmorillonite and alunite) by the presence of bright pixels (Clark, 1999;Hung, 2013;Imbroane et al, 2007;Sabins, 1999;Soe et al, 2005).…”

Section: Spectral Band Ratiomentioning

confidence: 99%

“…The iron oxides BR is useful for detecting ferric iron (Fe 3+ ) oxides such as hematite and goethite (Imbroane et al, 2007;Hung, 2013;Pour et al, 2019;Rockwell, 2013;Soe et al, 2005;Traore et al, 2020). At second, the BRs 5/7 and 6/7 for Landsat TM/ETM+ and OLI8, respectively, were applied in order to highlight hydroxyl-bearing minerals such as clay minerals (kaolinite, montmorillonite and alunite) by the presence of bright pixels (Clark, 1999;Hung, 2013;Imbroane et al, 2007;Sabins, 1999;Soe et al, 2005). Hydroxyl-bearing minerals represent the most common weathering minerals expected to occur in mining waste (Poormirzaee & Oskouei, 2010).…”

Section: Spectral Band Ratiomentioning

confidence: 99%

Evolution of the Koma Bangou Gold Panning Site (Niger) From 1984 to 2020 Using Landsat Imagery

Abdoulatif

Baratoux

et al. 2021

Earth and Space Science

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Artisanal and small-scale mining (ASM) is mainly prevalent in developing countries (Abaidoo et al., 2019;S. Keita, 2001;Owusu et al., 2019). A few years ago, small-scale mining was estimated to account for 15%-20% of global non-fuel mineral production (Hentschel et al., 2002). Although the African continent is home to some of the world's most coveted mineral resources, this favorable geological context has largely failed to lead it toward an equitable and sustainable development trajectory (Hilson, 2002). In some African countries, extreme poverty (A. Keita, 2017;Owusu & Dwomoh, 2012) and crop failures due to climate change are driving rural populations, consisting mainly of farmers, to engage in artisanal mining to meet their daily needs. Artisanal mining is currently the most important rural non-farm activity in Africa (Hilson, 2020). It

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Yerdi sand dunes (Erfoud area, southeastern of Morocco): color, composition, sand’s provenance, and transport pathways

et al. 2016

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Mineral Explorations by Landsat Image Ratios

Cited by 5 publications

References 3 publications

Mapping potential hydrocarbon sites in Upper Assam shelf using geospatial and geo-structural techniques

Mapping potential hydrocarbon sites in Upper Assam shelf using geospatial and geo-structural techniques

Evolution of the Koma Bangou Gold Panning Site (Niger) From 1984 to 2020 Using Landsat Imagery

Yerdi sand dunes (Erfoud area, southeastern of Morocco): color, composition, sand’s provenance, and transport pathways

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