The mapping of hydrothermal alteration related to the geothermal activities with remote sensing at Akarcay Basin (Afyonkarahisar), using Aster data

Yalçın, Mustafa; Gül, Fatmagül Kılıç; Yildiz, Ahmet; Polat, Nizar; Başaran, Can

doi:10.1007/s12517-020-06083-2

Cited by 8 publications

(2 citation statements)

References 27 publications

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“…Remote detection and mapping for geothermal surface manifestation are critical for efficient exploration [1,2]. Remote techniques, therefore, have extensively been utilised for mapping surface manifestation to preliminarily assess geothermal systems beneath the surface (e.g., [3]).…”

Section: Introductionmentioning

confidence: 99%

Remote Detection of Geothermal Alteration Using Airborne Light Detection and Ranging Return Intensity

Freski,

Hecker,

Meijde

et al. 2024

Remote Sensing

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The remote detection of hydrothermally altered grounds in geothermal exploration demands datasets capable of reliably detecting key outcrops with fine spatial resolution. While optical thermal or radar-based datasets have resolution limitations, airborne LiDAR offers point-based detection through its LiDAR return intensity (LRI) values, serving as a proxy for surface reflectivity. Despite this potential, few studies have explored LRI value variations in the context of hydrothermal alteration and their utility in distinguishing altered from unaltered rocks. Although the link between alteration degree and LRI values has been established under laboratory conditions, this relationship has yet to be demonstrated in airborne data. This study investigates the applicability of laboratory results to airborne LRI data for alteration detection. Utilising LRI data from an airborne LiDAR point cloud (wavelength 1064 nm, density 12 points per square metre) acquired over a prospective geothermal area in Bajawa, Indonesia, where rock sampling for a related laboratory study took place, we compare the airborne LRI values within each ground sampling area of a 3 m radius (due to hand-held GPS uncertainty) with laboratory LRI values of corresponding rock samples. Our findings reveal distinguishable differences between strongly altered and unaltered samples, with LRI discrepancies of approximately ~28 for airborne data and ~12 for laboratory data. Furthermore, the relative trends of airborne and laboratory-based LRI data concerning alteration degree exhibit striking similarity. These consistent results for alteration degree in laboratory and airborne data mark a significant step towards LRI-based alteration mapping from airborne platforms.

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Section: Introductionmentioning

confidence: 99%

Remote Detection of Geothermal Alteration Using Airborne Light Detection and Ranging Return Intensity

Freski,

Hecker,

Meijde

et al. 2024

Remote Sensing

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“…A hydrothermal eruption crater is an example of such a mechanism. Hydrothermally changed rocks and minerals, such as clays, carbonates, silicates (Keam et al , 2005), and calcites, are sometimes more subtle representations of geothermal systems than obvious surface expression or manifestations like hot springs (Yalcin et al , 2020). These minerals are by-products of metasomatism, or the contact of high-temperature fluids with rocks, which results in eventual alteration (Van Ruitenbeek et al , 2020).…”

Section: Introductionmentioning

confidence: 99%

Prospective geothermal well and heat catchment locations in Nigeria: Remote sensing interpretations and field validation

Akpan,

Emetere,

Afolalu

et al. 2023

Energy Exploration & Exploitation

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Geothermal energy is a renewable energy that is environmentally friendly and will help reduce greenhouse emission resulting from the burning of fossil fuels. Nigeria has numerous geothermal surface manifestations like hot and warm springs in most parts of the country that has not been exploited or explored due to the initial high cost of exploration. Most research conducted on geothermal energy prospects in Nigeria considered specific geographical sections. Due to the geological features of Nigeria, the direct and indirect tectonic activities, there is the need to map the thermal anomalies over Nigeria to determine likely geothermal wells and ground heat catchment in Nigeria. Forty years remote sensing dataset (1980–2019), was obtained from the MERRA-2 for three hundred and two (302) locations across Nigeria. The acquired thermal parameters were processed using known models. The data was also analyzed statistically and spatially using the Statistical Package for Social Sciences (SPSS) and Quantum Geographic Information System (QGIS). The results of show that the Gummel-Kumaganum areas of chad basin, Owode-igbo ora areas of the Dahomey basin, Belli area of the basement complex in Taraba state, potiskum areas of the Upper benue Basin, Ekpoma-kwale, itu areas of the Niger delta basin are middle geothermal wells with the terrestial radiation of < −702 W/m2 while the terrestial radiation >200 W/m2 in the Gummi area of the sokoto basin, Hunkuyi area of the basement complex in the northeast, Gashua area of the chad basin, Ozubulu-idah area of Anambra basin, Atijere area of the Dahomey basin, Agbasa, Omoko, Akamkpa area of Niger delta basin, Shaki area of the southwest basement complex are heat catchment regions. Other heat catchment areas had been identified for standalone energy generation. Also, the thermal anomalies in those areas were significant. The validation of the result was achieved via benchmarking similar geothermal well around the globe and ground truthing at Ijebu-Ode Nigeria. Based on the thermal reversal depth (TRD) concept, Ijebu-Ode may have a deep geothermal well with temperatures pattern similar to geothermal wells in other parts of the globe. It is recommended that ground measurement should be carried out in the basement complex to cater for geothermal systems whose mechanism is based on conduction.

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UAV-based RGB and TIR imaging for geothermal monitoring: a case study at Kestanbol geothermal field, Northwestern Turkey

Yücel

2023

Environ Monit Assess

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The mapping of hydrothermal alteration related to the geothermal activities with remote sensing at Akarcay Basin (Afyonkarahisar), using Aster data

Cited by 8 publications

References 27 publications

Remote Detection of Geothermal Alteration Using Airborne Light Detection and Ranging Return Intensity

Remote Detection of Geothermal Alteration Using Airborne Light Detection and Ranging Return Intensity

Prospective geothermal well and heat catchment locations in Nigeria: Remote sensing interpretations and field validation

UAV-based RGB and TIR imaging for geothermal monitoring: a case study at Kestanbol geothermal field, Northwestern Turkey

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