Results 21 to 30 of about 7,307 (154)

Spectral characterisation of hydrothermal alteration associated with sediment-hosted Cu–Ag mineralisation in the central European Kupferschiefer [PDF]

open access: yesSolid Earth, 2023
The analysis of hydrothermal alteration in exploration drill cores allows for fluid–rock interaction processes to be traced, for fluid flow paths to be identified, and thus for vectors in mineral systems to be determined. Hyperspectral imaging techniques
L. Géring   +5 more
doaj   +1 more source

Induced Polarization Images the Plumbing System of Hydrothermal Vents in an Intracontinental Rift, Lake Abhé, Republic of Djibouti

open access: yesGeophysical Research Letters, 2023
Recent developments in induced polarization allow for the characterization of alteration halos within hydrothermal systems. We explore the possibility of using electrical conductivity and normalized chargeability tomograms in concert to image ...
L. Piolat, Y. Geraud, A. Revil
doaj   +1 more source

Integration of support vector machines for hydrothermal alteration mapping using ASTER data – case study: the northwestern part of the Kerman Cenozoic Magmatic Arc, Iran [PDF]

open access: yesInternational Journal of Mining and Geo-Engineering, 2020
This work applies support vector machine (SVM) algorithms in two versions of singular and general SVM classifiers to map hydrothermal alteration zones in the northwestern part of the Kerman Cenozoic Magmatic Arc (KCMA).
Saeed Mojeddifar, Mohammad Mavadati
doaj   +1 more source

Geochemistry of Dorojen volcanic rocks (SW Ardestan) with the special use of mineral chemistry of Propylitic alteration zones [PDF]

open access: yesپترولوژی, 2021
Dorojin area in the Southwest of Ardestan city is part of the Urmia-Dokhtar magmatic zone. In the area of study, the intrusion of the Early Miocene granodiorite into the Middle-late Eocene sedimentary-volcanic complex caused the formation of hydrothermal
mahboobeh jamshidibadr   +4 more
doaj   +1 more source

Radiometric Mapping for The Identification of Hydrothermally Altered Zones Related to Gold Mineralization in Ife–Ilesa Schist Belt, Southwestern Nigeria

open access: yesIndonesian Journal of Earth Sciences, 2023
This study presents the interpretation of airborne gamma ray spectrometric data to delineate hydrothermally altered zones related to gold mineralization in the Ife–Ilesa Schist belt. K/eTh, Kd and F–Maps highlighting Potassic alterations related to gold
Ayokunle Adewale Akinlalu
doaj   +1 more source

Hydrothermal Alteration of Glass to Chrysotile [PDF]

open access: yesJournal of the American Ceramic Society, 2012
Chrysotile fibers were synthesized from glass in hydrothermal conditions. The starting materials were first held at 1650°C and then rapidly quenched down to room temperature. The resulting glass, after the addition of mineralizing agents, was hydrothermically altered in the following conditions: temperature 300 °
BLOISE, Andrea   +5 more
openaire   +3 more sources

Hydrothermal Alteration on Composite Volcanoes: Mineralogy, Hyperspectral Imaging, and Aeromagnetic Study of Mt Ruapehu, New Zealand

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Prolonged volcanic activity can induce surface weathering and hydrothermal alteration that is a primary control on edifice instability, posing a complex hazard with its challenges to accurately forecast and mitigate.
Gabor Kereszturi   +3 more
doaj   +1 more source

Hydrothermal alteration of kimberlite by convective flows of external water [PDF]

open access: yesContributions To Mineralogy and Petrology, 2014
Andrey Afanasyev, Oleg Melník
exaly   +2 more sources

Aqueous alteration mapping in Rishabdev ultramafic complex using imaging spectroscopy

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2020
Hyperspectral remote sensing/imaging spectroscopy has enabled precise identification and mapping of hydrothermal alteration mineral assemblages based on diagnostic absorption features of minerals.
Hrishikesh Kumar, A.S. Rajawat
doaj   +1 more source

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