In Situ Measurements of the H2o:co2 Ratio in Fluid Inclusions by Infrared Spectroscopy

Linnen, Robert L.; Keppler, Hans; Sterner, S. Michael

doi:10.2113/gscanmin.42.5.1275

Cited by 9 publications

(3 citation statements)

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“…The measurements use laser at 532 nm, 50 mW, collection time 10 s, and range 0-4,000 cm -1 . Further Fourier Transform Infrared (FT-IR) spectroscopy (e.g., Linnen et al, 2004) were used to determined analysis of volatile-bearing inclusions. The analyses were performed on a Bruker Tensor 27 coupled with a Hyperior at Centro de Geociencias (UNAM, México).…”

Section: Analytical Proceduresmentioning

confidence: 99%

“…The absorption band of FTIR spectra representative of components and solutes in fluid inclusions were identified through various references e.g., 900-1,500 cm -1 (for SO 4 2− and HSO 4 − ; Fortin et al, 2002;Oppenheimer and Kyle, 2008), 1,010-1,240 and 2,440-2,780 cm -1 (for SO 2 ; Giuliani et al, 2003;Oppenheimer and Kyle, 2008), 1800-2,850 cm -1 (for H 2 S; Giuliani et al, 2003), 2,020-2,400 cm -1 (for CO, CO 2 , and COS; Linnen et al, 2004;Oppenheimer and Kyle, 2008) and near 3,200-3,700 (for H 2 O; Dereppe et al, 1994;Linnen et al, 2004). The native sulphur key wavebands were 550-950 cm -1 , with strong bands in the range 800-950 cm -1 (Eckert and Steudel, 2003;Giuliani et al, 2003).…”

Section: Analytical Proceduresmentioning

confidence: 99%

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Hydrothermal alteration, fumarolic deposits and fluids from Lastarria Volcanic Complex: A multidisciplinary study

Aguilera

Layana

Rodríguez-Díaz

et al. 2016

andgeo

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ABSTRACT.A multidisciplinary study that includes processing of Landsat ETM+ satellite images, chemistry of gas condensed, mineralogy and chemistry of fumarolic deposits, and fluid inclusion data from native sulphur deposits, has been carried out in the Lastarria Volcanic Complex (LVC) with the objective to determine the distribution and characteristics of hydrothermal alteration zones and to establish the relations between gas chemistry and fumarolic deposits. Satellite image processing shows the presence of four hydrothermal alteration zones, characterized by a mineral assemblage constituted mainly by clay minerals, alunite, iron oxides, and more subordinated ferrous minerals and goethite. Hydrothermal alteration zones present in the Lastarria sensu stricto volcano are directly related to the recent fumarolic activity. Geochemistry of fumarolic gas condensed, obtained from two fumaroles at temperatures between 328 and 320 °C, has allowed detecting 37 diverse elements corresponding to halogens, chalcophiles, siderophiles, alkali metals, alkali earth metals and Rare Earth Elements (REE), with concentrations that vary widely between 5,620 ppm (chlorine) and 0.01 ppm (Mo, Ag, Sn, Pb, Se, Mg and Cr). Logarithm of Enrichment Factor (log EF i ) for each element present values between 6.35 (iodine) and <1 (K, Na, Ca, Fe and Al). Those elements are originated primarily from a magmatic source, whereas at shallow level a hydrothermal source contributes typical rock-related elements, which are leached from the wall rock by a strong interaction with hyperacid fluids. Mostly of elements detected are transported to the surface in the fumarolic emissions as gaseous species, while very few elements (Mg, Ca and Al) are transported in silicate aerosols. A wide spectrum of minerals are present in the fumarolic deposits, which are constituted by sublimates and incrustations, and the main minerals phases are distributed in six mineral families, corresponding to sulphates, hydrated sulphates, sulphides, halides, carbonates, silicates and native element minerals. The sublimate/incrustation minerals are dominated by the presence of sulphate, sulphur, chlorine and diverse rock-related elements, which are formed by processes that include a. oxidation of gaseous phase; b. strong rock-fluid interaction; c. dissolution of silicate minerals and volcanic glass; d. gas-water interaction; e. deposition/precipitation of saline bearing minerals; f. oxidation of sublimates/incrustations to form secondary minerals and g. remobilization of sulphur deposits by meteoric water. Despite that sublimate/ incrustation minerals are dominated by rock-related elements, its chemistry shows high contents of high-volatile elements as As, Sb, Cd, among others. Fluid inclusions studies carried out in thin pseudobanded native sulphur from fumarolic deposits, by use of Raman and infrared spectroscopy combined with microthermometry analyses, provided evidence of H 2 O, CO 2 , H 2 S, SO 4 , COS bearing fluids, homogenization temperatures around 110 °C and salinities v...

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Section: Analytical Proceduresmentioning

confidence: 99%

Section: Analytical Proceduresmentioning

confidence: 99%

Hydrothermal alteration, fumarolic deposits and fluids from Lastarria Volcanic Complex: A multidisciplinary study

Aguilera

Layana

Rodríguez-Díaz

et al. 2016

andgeo

View full text Add to dashboard Cite

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“…On the contrary, the spectroscopic analysis of CO 2 is common in glasses (e.g. King et al 2002, Morizet et al 2010, while rare tests have been made for fluid inclusions within minerals (Linnen et al 2004).…”

Section: The Distribution Of H and C In Mineralsmentioning

confidence: 99%

SR-FTIR Microscopy and FTIR Imaging in the Earth Sciences

Ventura

Marcelli

Bellatreccia

2014

Reviews in Mineralogy and Geochemistry

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2 INTRODUCTIONInfrared spectroscopy was developed at the beginning of the XX century for analytical chemical purposes and it is remarkable that the first contribution of the first issue of Physical Review, one of the first and among the most important physical magazines, published in 1883, was devoted to "a study of the transmission spectra of certain substances in the infrared" that included also a plate of a quartz rock crystal (Nichols 1883). In 1905 William W.Coblentz released the very first database of IR spectra where the characteristic wavelength at which various materials absorbed the IR radiation were listed. For more than a century IR spectroscopy has been considered as a powerful analytical tool for phase identification and to characterize the structural features and quantify molecules or molecular arrangements in solids, and also in liquids and gases. This technique has been used extensively by organic chemists, and since the 1950s it has been recognized as a fundamental technique in mineralogical and Earth sciences in conjunction with X-ray diffraction (Keller and Pickett 1949, 1950, Launer 1952, Adler and Kerr 1965. The first "encyclopedia" of IR spectra of minerals appeared in 1974 (Farmer 1974) and is still a primary reference for those using infrared spectroscopy as a tool in material science.In the late '60s -beginning of '70s a new IR technique, Fourier-transform infrared (FTIR) spectroscopy, was developed and later a new class of spectrometers was commercially available, based upon the combination of a FFT (Fast-Fourier-Transform) algorithm and computers. The advantage of these instruments over the previously used wavelengthdispersive spectrometers is fully described in several books, e.g. Griffiths and de Haseth (1986) and Smith (1996). Briefly, in FTIR spectrometers IR light is focused through an interferometer and then through the sample. A moving mirror inside the apparatus alters the distribution of infrared light (wavelength) that passes through the interferometer. The recorded signal, called an interferogram, represents light output as a function of mirror position, which correlates with wavelength. A FFT data-processing transforms the raw data into the sample spectrum. A major advantage of the FTIR spectrometers is that the information in the entire frequency range is collected simultaneously, improving both speed and signal-to-noise ratio (SNR).During the last decades, several books have been devoted to the application of spectroscopic methods in mineralogy, e.g. Volume 18 of Reviews in Mineralogy (Hawthorne 1988). Several short courses (e.g. Beran and Libowitzky 2004) and meetings have addressed particular aspects of spectroscopy, such as the analysis of hydrous components in minerals 3 and Earth materials (e.g. Keppler and Smyth 2006). In these books, complete treatment of the infrared theory and practical aspects of instrumentation and methods, along with an exhaustive list of references, can be found.The present chapter is intended to cover those aspects of infrared spectroscopy t...

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Application of micro-FTIR imaging in the Earth sciences

et al. 2010

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In this paper we describe recent applications of micro-infrared imaging in the Earth sciences. We address, in particular, the use of Fourier-transform infrared (FTIR) spectroscopy in characterizing the zoning and speciation of H and C in a variety of geological materials, including microporous minerals, nominally anhydrous volcanic minerals (NAMs), and crystal inclusions. These investigations show that use of the modern techniques of FTIR imaging enables detection of the zoning of volatile species across the studied samples, and possible configuration changes of structurally-bound carbon molecular species (e.g., CO(2) vs CO(3)) during crystal growth. Such features, which are not accessible with other micro-analytical techniques, may provide information about the physicochemical properties which act as constraints in the genesis of the samples, and important information about the evolution of the geological system. Tests performed with focal-plane-array detectors (FPA) show that resolution close to the diffraction limit can be achieved if the amounts of the target molecules in the sample are substantially different. We also point out the possibility of using FTIR imaging for investigations under non-ambient conditions.

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In Situ Measurements of the H2o:co2 Ratio in Fluid Inclusions by Infrared Spectroscopy

Cited by 9 publications

References 8 publications

Hydrothermal alteration, fumarolic deposits and fluids from Lastarria Volcanic Complex: A multidisciplinary study

Hydrothermal alteration, fumarolic deposits and fluids from Lastarria Volcanic Complex: A multidisciplinary study

SR-FTIR Microscopy and FTIR Imaging in the Earth Sciences

Application of micro-FTIR imaging in the Earth sciences

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