Combined investigations of fluid inclusions in opaque ore minerals by NIR/SWIR microscopy and microthermometry and synchrotron radiation X-ray fluorescence

Ríos, Francisco Javier; Alves, James Vieira; Pérez, Carlos A.; Costa, Edén C.; Rosière, Carlos Alberto; Fuzikawa, Kazuo; Neves, José Marques Correia; Chaves, Alexandre de Oliveira; Prates, Sônia Pinto; Barrio, Raúl E. de

doi:10.1016/j.apgeochem.2006.02.011

Cited by 12 publications

(7 citation statements)

References 24 publications

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“…Os outros picos encontrados coincidem com os correspondentes ao hospedeiro (Si, Ca, Ti, Mn, Fe e Zn). Não foi identificado o pico de U, o que confirma observações petrográficas recentes (somente da jazida da Cachoeira), que sugerem ser o piroxênio imediatamente anterior ao principal evento uranífero na região (Chaves et al, 2006).…”

Section: Piroxêniosunclassified

“…Os estudos, por µSXRF, nesses minerais opacos, foram desenvolvidos utilizando uma câmera que opera no espectro da luz visível e o início do espectro de infravermelho (near infrared) (Rios et al, 2006). Nas hematitas estudadas (provenientes do Quadrilátero Ferrífero-MG), foi detectada a presença de Ca e provável Fe, Ba, Ti e K nas soluções.…”

Section: Hematita E Pirargiritaunclassified

“…Entretanto a maior parte dos estudos de inclusões fluidas, em minerais transparentes, foram desenvolvidos recentemente por Rankin et al (1992), Mavrogenes et al, (1995), Philippot et al, (1998Philippot et al, ( e 2001, Vanko e Mavrogenes (1998); Hayashi e Lida (2001), Vanko et al, (2001); Menez et al, (2002) e Samson et al, (2003). No Brasil, os primeiros estudos de inclusões fluidas em minerais transparentes foram desenvolvidos por Xavier et al, (1999), Alves et al, (2000a, b) e Rios et al (2006), na Estação de Microfluorescência de Raios X Sincrotron (µSXRF), instalada no Laboratório Nacional de Luz Sincrotron (LNLS) em Campinas, SP.…”

Section: Introductionunclassified

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Estudos por µXRF-Sincrotron de fluidos mineralizadores detectados em minérios uraníferos, ferríferos e depósitos epitermais

Ríos

Fuzikawa

Alves

et al. 2006

Rem: Rev. Esc. Minas

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O método de análise não-destrutivo denominado Microfluorescência de Raios X. (µSXRF, radiação Sincrotron) tem sido utilizado recentemente em laboratórios de luz Sincrotron de vários países para identificar e, em situações especiais, quantificar elementos menores, maiores e traços em inclusões fluidas. Com esse intuito, a estação de µSXRF do LNLS (Laboratório Nacional de Luz Sincrotron, Campinas) foi utilizada para desenvolver estudos composicionais de inclusões fluidas em minerais transparentes (quartzo, adulária, esmeralda, piroxênio) de diferentes jazidas minerais e minérios opacos de Ag e Fe.

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Section: Piroxêniosunclassified

Section: Hematita E Pirargiritaunclassified

Section: Introductionunclassified

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Estudos por µXRF-Sincrotron de fluidos mineralizadores detectados em minérios uraníferos, ferríferos e depósitos epitermais

Ríos

Fuzikawa

Alves

et al. 2006

Rem: Rev. Esc. Minas

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“…Setting up optimal parameters in metallurgical industrial processes as those for ore agglomeration and iron metal production depends upon the mineralogical characteristics of the ore, including size and crystal arrangement. The study of existing fluid inclusions in crystalline formations is also of particular interest as it can tell us about various physical-chemical conditions governing the crystallization or re-crystallization of minerals, including any metamorphic events, occurring subsequently to the mineral genesis [3][4][5][6]. The nature of fluids forming or somehow involved in subsequent genetic events of deposits may also evidence chemical and physical conditions governing the transformation mechanisms of primary minerals to form hematite or specularite, a black-shinning plated form of metamorphic hematite.…”

Section: Introductionmentioning

confidence: 99%

Hematite from a mining area in the east border of Quadrilátero Ferrífero, Minas Gerais, Brazil

et al. 2009

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Iron oxides are dominant minerals in many geo-domains of economical interest, as iron ore mines. Knowing the main mineral transformation pathways is a fundamental step to plan prospecting new mineral deposits. This study aimed at contributing to a better understanding of the chemical and mineralogical processes related to the genesis and transformations of iron oxides involving hematite in an iron-ore mine of the east border of Quadrilátero Ferrífero, Minas Gerais, Brazil. Two representative geo-samples were analyzed with synchrotron radiation X-ray diffraction (XRD), 57 Fe Mössbauer spectroscopy, X-ray fluorescence and saturation magnetization (σ ) measurements. The iron content varied from 65 to 69 mass% Fe. From XRD data, hematite is indeed the major mineral for all samples but characteristic reflections of goethite and magnetite also appear. For the magnetic A.R.P. Pereira et al.sample, σ = 6.9 J T −1 kg −1 . 298 K-and 110 K-Mössbauer data allow characterizing hematite in these iron-rich geo-materials.

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“…It is reported that NIR microscope has been applied to the spectra collection, 3 the morphologic observation of microorganism or tissue, 4,5 quantity tracking study 6 and the morphology research of inorganic chemicals. 7,8 However, all the applications mentioned above are not the single compound imaging strictly. Deriving the frequency doubling and combination band of molecular vibration of hydric groups, NIR spectra are usually overlapped seriously.…”

Section: Introductionmentioning

confidence: 99%

The application of near-infrared spectra micro-image in the imaging analysis of biology samples

Wang

Ding

Guo

et al. 2014

J. Innov. Opt. Health Sci.

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In this research, suitable imaging methods were used for acquiring single compound images of biology samples of chicken pectorales tissue section, tobacco dry leaf, fresh leaf and plant glandular hair, respectively. The adverse e®ects caused by the high water content and the thermal e®ect of near infrared (NIR) light were e®ectively solved during the experiment procedures and the data processing. PCA algorithm was applied to the NIR micro-image of chicken pectorales tissue. Comparing the loading vector of PC3 with the NIR spectrum of dry albumen, the information of PC3 was con¯rmed to be provided mainly by protein, i.e., the 3rd score image represents the distribution trend of protein mainly. PCA algorithm was applied to the NIR microimage of tobacco dry leaf. The information of PC2 was con¯rmed to be provided by carbohydrate including starch mainly. Compared to the 2nd score image of tobacco dry leaf, the compared correlation image with the reference spectrum of starch had the same distribution trend as the 2nd score image. The comparative correlation images with the reference spectra of protein, glucose, fructose and the total plant alkaloid were acquired to con¯rm the distribution trend of these compounds in tobacco dry leaf respectively. Comparative correlation images of fresh leaf with the reference spectra of protein, starch, fructose, glucose and water were acquired to con¯rm ¶ Corresponding author. This is an Open Access article published by World Scienti¯c Publishing Company. It is distributed under the terms of the Creative Commons Attribution 3.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited. Vol. 7, No. 4 (2014) the distribution trend of these compounds in fresh leaf. Chemimap imaging of plant glandular hair was acquired to show the tubular structure clearly. Journal of Innovative Optical Health Sciences

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Combined investigations of fluid inclusions in opaque ore minerals by NIR/SWIR microscopy and microthermometry and synchrotron radiation X-ray fluorescence

Cited by 12 publications

References 24 publications

Estudos por µXRF-Sincrotron de fluidos mineralizadores detectados em minérios uraníferos, ferríferos e depósitos epitermais

Estudos por µXRF-Sincrotron de fluidos mineralizadores detectados em minérios uraníferos, ferríferos e depósitos epitermais

Hematite from a mining area in the east border of Quadrilátero Ferrífero, Minas Gerais, Brazil

The application of near-infrared spectra micro-image in the imaging analysis of biology samples

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