Rapid Raman mapping of a fulgurite

  title={Rapid Raman mapping of a fulgurite},
  author={Elizabeth A. Carter and Matthew A Pasek and Tim Smith and Terence P. Kee and Peter Hines and Howell G. M. Edwards},
  journal={Analytical and Bioanalytical Chemistry},
AbstractA fulgurite is a naturally occurring glass formed when lightning hits sand, rock, or soil. The formation of fulgurites is accompanied by mineralogical and sometimes compositional changes, and may record information about the environment in which they were formed. A previous investigation using Raman point spectroscopy discovered the presence of anatase, a low-temperature polymorph of TiO2, and polyaromatic hydrocarbons within a fulgurite. These findings indicate that there were regions… Expand
Mineralogical and compositional features of rock fulgurites: A record of lightning effects on granite
Abstract Fulgurites are a naturally occurring glass formed when sand, rock, or soil is struck by atmospheric electrical discharges (lightning). The aim of this paper is to provide insights into theExpand
The occurrence of iron silicides in a fulgurite: Implications for fulgurite genesis
Rapidly formed eutectic textures are observed in Fe silicides in a fulgurite from Michigan. The 14 cm-diameter fulgurite was formed in sandy glacial till in 2014 near Houghton Lake, Michigan.Expand
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Fulgurite morphology: a classification scheme and clues to formation
Fulgurites are natural glasses formed by cloud-to-ground lightning. Several different morphologies of fulgurites have been reported in previous studies, including sand fulgurites, rock fulgurites,Expand
The forensics of fulgurite formation
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The response of zircon to the extreme pressures and temperatures of a lightning strike.
Zircon dissociation to ZrO2 and SiO2 is a high-temperature, relatively low-pressure phenomenon, consistent with previous suggestions that lightning strikes involve extreme temperatures as well as pressures greater than those usually generated in Earth's crust but rarely > 10 GPa. Expand


A Raman spectroscopic study of a fulgurite
The Raman spectra revealed several forms of crystalline and fused silica and also the presence of polyaromatic hydrocarbons found in an interfacial zone of a glass bubble, suggesting that some regions of the fulgurite specimen were not subjected to temperatures of 1800°C, which are attained when lightning hits the surface of sand or a rock. Expand
The fulgurite of Torre de Moncorvo (Portugal): description and analysis of the glass
The fulgurite of Torre de Moncorvo (Portugal) was formed by lightning striking a small electricity pylon; it consists morphologically of a central cylinder with radial ramifications several metresExpand
Paleoecology reconstruction from trapped gases in a fulgurite from the late Pleistocene of the Libyan Desert
When lightning strikes the ground, it heats, melts, and fuses the sand in soils to form glass tubes known as fulgurites. We report here the composition of CO 2 , CO, and NO contained within theExpand
Oxide reduction during triggered-lightning fulgurite formation
Abstract In this study triggered-lightning induced fulgurites were formed in 99.9% pure binary oxides of manganese (MnO) and nickel (NiO) in order to study oxide reduction mechanisms. The fulguriteExpand
Lightning Strike Fusion: Extreme Reduction and Metal-Silicate Liquid Immiscibility
Thermodynamic calculations indicate that temperatures in excess of 2000 K and reducing conditions approaching those of the SiO2-Si buffer were needed to form the coexisting metallic and silicate liquids. Expand
SEM observations on some sand fulgurites from northern Australia
ABSTRACT Sand fulgurites fragments from a siliceous coastal dune field in North Queensland have been examined with a scanning electron microscope (SEM). The fulgurites show a number of morphologicalExpand
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— The occurrence of shock metamorphosed quartz is the most common petrographic criterion for the identification of terrestrial impact structures and lithologies. Its utility is due to its almostExpand
Raman spectroscopy as a tool for the non-destructive identification of organic minerals in the geological record
Abstract Organic minerals can be considered as a forgotten group of organic components in the geological record. They are salts of organic acids originating directly in plant metabolic processes,Expand
Extraterrestrial Flux of Potentially Prebiotic C, N, and P to the Early Earth
This work quantifies the sources of potentially prebiotic, extraterrestrial C, N, and P and correlates these fluxes with a comparison to total Ir fluxes, and estimates the effect of atmosphere on the survival of material. Expand
Multiple techniques for mineral identification on Mars: a study of hydrothermal rocks as potential analogues for astrobiology sites on Mars
Abstract Spectroscopic studies of Mars analog materials combining multiple spectral ranges and techniques are necessary in order to obtain ground truth information for interpretation of rocks andExpand