Identification of ammonium-bearing minerals by shortwave infrared reflectance spectroscopy at the Esquel gold deposit, Argentina

The Esquel low-sulfidation epithermal vein deposit in Chubut province, Argentina, is hosted by a Late Jurassic bimodal arc assemblage. Shortwave infrared (SWIR) reflectance spectroscopy of vein samples using a band-held field spectrometer identified ammonium-bearing illite, jarosite, and adularia (b...

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Detalles Bibliográficos
Autores principales: Rubinstein, Nora Alicia, Godeas, Marta Carmen
Publicado: 2008
Materias:
Clay minerals
Feldspar
Gold deposits
Infrared spectroscopy
Mineralogy
Minerals
Oxide minerals
Precious metals
Quartz
Reflection
Spectrum analysis
Argentina
Buddingtonite
Epithermal
Jarosite
Jurassic
Reflectance spectroscopies
Short waves
Shortwave infrared reflectances
Sulfidation
Vein deposits
Ammonium compounds
ammonium
epithermal deposit
gold
infrared spectroscopy
mineralization
ore deposit
quartz vein
shortwave radiation
South America
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03610128_v103_n4_p865_Soechting
http://hdl.handle.net/20.500.12110/paper_03610128_v103_n4_p865_Soechting
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The Esquel low-sulfidation epithermal vein deposit in Chubut province, Argentina, is hosted by a Late Jurassic bimodal arc assemblage. Shortwave infrared (SWIR) reflectance spectroscopy of vein samples using a band-held field spectrometer identified ammonium-bearing illite, jarosite, and adularia (buddingtonite) in banded quartz displaying colloform and crustiform textures. The SWIR technique proved to be a rapid and accurate means of detecting ammonium-bearing species, particularly buddingtonite, which provides evidence for paleoboiling zones and thus of precious metal mineralization. © 2008 Society of Economic Geologists, Inc.

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