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Influence of volcanic glass on the magnetic signal of different paleosols in Córdoba, Argentina
(Springer, 2017-04)
This contribution comprises geological and magnetic results obtained in loess and paleosols profiles outcropped in the Pampean plain (Argentina). The sedimentary sequence exposed in Córdoba province is represented by four ...
Physico-chemical characterization of macusanite and inclusions: A volcanic glass from peruvian andes
(2021-01-01)
Macusanite is a volcanic glass extracted from the volcanic field Macusani - Peru, formed by the fast cooling of magma. This study shows physical and chemical characterization of Macusanite samples to better understand its ...
Surface modifications of Volcanic Glasses (Perlites) by water vapor
(Planta Piloto de Ingeniería Química, 2003-12)
Hydrothermal treatments on expanded volcanic glasses (perlites) were studied. The main objective of this paper is to obtain an activated surface able to interact with specific chemical substances. The above mentioned ...
Association of phosphate with rhyolite glass in marine Neogene tuffs from Patagonia, Argentina
(Wiley Blackwell Publishing, Inc, 2013-06)
The precipitation/replacement of Ca-phosphate is a complex process that commonly takes place during the early diagenesis in marine sediments. The unusual occurrence of shallow marine, early diagenetic phosphatic deposits ...
Fission-track evolution in Macusanite volcanic glass
(2020-11-01)
Macusanite is a natural volcanic glass, which is produced by the rapid cooling of magma during a volcanic eruption. Since it typically contains concentrations of uranium, it can be used for fission-track dating. Understanding ...
Fluorine surface speciation in South Andean volcanic ashes
(Elsevier Science, 2020-01)
Fresh volcanic ash samples collected during the eruptions of the Hudson (1991), Chaitén (2008), Puyehue (2011), Calbuco (2015) and Copahue (2016) volcanoes were analyzed in order to identify the fluorine (F) bearing phases. ...
The origin of spheroidal halloysites: A review of the literature
(Mineralogical Soc, 2016-06)
Tubular halloysite has many applications as a nanomaterial. Spheroidal halloysite (SPH) is the other most common form of halloysite. Its mode of formation has had different explanations, including association with allophane, ...
Massive volcanic glass: natural pozzolan in the West of São Paulo StateVidro vulcânico maciço: pozolana natural no oeste paulista
(Universidade de São Paulo, Instituto de Geociências, 2011)
Electrical characterization of the Macusanite volcanic glass and influence of nuclear fission tracks on electrical conductivity
(2020-11-01)
Direct current dielectrical measurements were performed on samples of natural volcanic glass Macusanite with and without previous heat treatment at 650 °C for 10 h. Samples were analyzed via Source Measure Unit Keithley ...