Footprints of ore fluid pathway and implications to mineral exploration in the Shihu Gold Deposit, North China: Evidence from short wave infrared spectroscopy of illitic alteration rocks

The aim of this investigation is to study the changes occurring on the surface of poplar wood exposed to artificial irradiation in a Solar Box. Colour changes were monitored with a reflectance spectrophotometer. Surface chemical modifications were evaluated by measuring the infrared spectra. Hyperspectral imaging was also applied to study the surface wood changes in the visible-near infrared and the short wave infrared wavelength ranges. The data obtained from the different techniques were compared to find the possible correlations in order to evaluate the applicability of the Hyperspectral imaging to investigate wood modifications in a non-invasive modality. The study of colour changes showed an important variation due to photo-irradiation which is the greatest change occurring within the first 24 hours. Infrared spectroscopy revealed that lignin degrades mainly in the first 48 hours. Concerning Hyperspectral imaging, the spectral features in the visible-near infrared range are mainly linked to the spectral shape, whereas in the short wave infrared cellulose and lignin affect shape and reflectance levels. The proposed approach showed that a correlation can be established between colour variation and wood degradation in the visible-near infrared range; furthermore in the short wave infrared region surface chemical changes can be assessed.

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Potential of short-wave infrared spectroscopy for quantitative depth profiling of stratum corneum lipids and water in dermatology

Biomedical Optics Express ◽

10.1364/boe.9.002436 ◽

2018 ◽

Vol 9 (5) ◽

pp. 2436 ◽

Cited By ~ 5

Author(s):

Anna Ezerskaia ◽

Natallia Eduarda Uzunbajakava ◽

Gerwin J. Puppels ◽

Johanna de Sterke ◽

Peter J. Caspers ◽

...

Keyword(s):

Infrared Spectroscopy ◽

Stratum Corneum ◽

Depth Profiling ◽

Short Wave ◽

Stratum Corneum Lipids ◽

Short Wave Infrared

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Biomass and Total Lipid Content Assessment of Microalgal Cultures Using Near and Short Wave Infrared Spectroscopy

BioEnergy Research ◽

10.1007/s12155-013-9373-9 ◽

2013 ◽

Vol 7 (1) ◽

pp. 306-318 ◽

Cited By ~ 11

Author(s):

Vineela Challagulla ◽

Kerry B. Walsh ◽

Phul Subedi

Keyword(s):

Infrared Spectroscopy ◽

Total Lipid ◽

Lipid Content ◽

Total Lipid Content ◽

Short Wave ◽

Content Assessment ◽

Short Wave Infrared

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Thermoluminescence of quartz from Shihu gold deposit, western Hebei province, China: some implications for gold exploration

Open Geosciences ◽

10.2478/v10085-010-0010-y ◽

2010 ◽

Vol 2 (4) ◽

Author(s):

Ye Cao ◽

Shengrong Li ◽

Meijuan Yao ◽

Huafeng Zhang

Keyword(s):

Gold Deposit ◽

Cross Sections ◽

North China Craton ◽

North China ◽

Mineral Exploration ◽

Gold Deposits ◽

Quartz Veins ◽

The North ◽

Indicator Mineral ◽

Gold Bearing

AbstractThermoluminescence (TL) of monomineralic separates have been widely used in various geosciences fields in order to trace the thermal history and aid in prospecting for gold deposits. Quartz is a ubiquitous mineral in the Shihu gold deposit, which is situated in the northern part of the Taihang orogenic belt in the North China craton (NCC). The deposit is hosted by ductile-brittle faults within an Archean metamorphic core complex of the Fuping Group. This deposit is characterized by gold-bearing quartz-polymetallic sulfides and quartz veins. New TL results have been obtained for quartz, in which four type-TL glow curves were identified. The gold-bearing quartz present type III glow curves that consist of two peak glow curves at the middle and high peak temperatures with the similar TL intensity. In addition, the cross-sections of peak temperatures and TL intensity highlight the valuable area where the Au-bearing quartz present weak TL intensity and low-middle peak temperatures. Our results significantly enhance the usefulness of quartz in metallogenic studies of the North China craton and as an indicator mineral in mineral exploration of the Taihang Mountain region.

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