Results 191 to 200 of about 5,024 (208)

Surface reflectance and pXRF for assessing soil weathering indexes

Journal of South American Earth Sciences, 2022
The use of satellite images is a widespread technique for estimating soil attributes. However, what is the potential of satellite data on the prediction of soil weathering indices? How much in their performance is affected by spectral mixing and data resolution? There is no consensus for answering these questions.
Souza, Arnaldo Barros e, Di Raimo, Luis Augusto Di Loreto, Mello, Danilo César de, Guimarães, Clecia Cristina B., Urbina-Salazar, Diego F., Silva, Sérgio Henrique Godinho, Curi, Nilton, Demattê, José A. M.   +7 more
openaire   +2 more sources

Characterization of New Zealand obsidian using PXRF

Journal of Archaeological Science, 2011
Abstract New Zealand has some of the most active areas of rhyolitic volcanism in the world and this has produced numerous obsidian sources in the northern half of the North Island. In total archaeologists have recognized 27 named locations from which obsidian can be obtained scattered across 4 geological source regions.
Sheppard, Peter J, Irwin, Geoff J, Lin, Sam C, Mccaffrey, Cameron P   +3 more
openaire   +2 more sources

pXRF: a study of inter-instrument performance

Journal of Archaeological Science, 2012
Abstract Integrating portable X-ray fluorescence (pXRF) instrumentation into archaeological investigations has generated as much interest as skepticism because several characteristics of the technique limit analytical accuracy and precision. This paper seeks to explore inter-instrument performance in order to assess the potential pXRF instrumentation
Nathan Goodale, David G. Bailey, George T. Jones, Catherine Prescott, Elizabeth Scholz, Nick Stagliano, Chelsea Lewis   +6 more
openaire   +1 more source

Enkomi (Cyprus): Using pXRF spectroscopy to identify LBA copper alloys

Journal of Archaeological Science: Reports, 2021
Abstract A collection of 206 copper-base artefacts coming from the Late Bronze Age settlement of Enkomi, located on the east coast of Cyprus, and dated to the 16th-11th centuries BC, was studied and non-destructively chemically analysed using a handheld pXRF instrument. The assemblage consists of various categories of objects, such as weapons, tools,
Andreas Charalambous, George Papasavvas, Vasiliki Kassianidou   +2 more
openaire   +1 more source

Sourcing without sources: Measuring ceramic variability with pXRF

Journal of Archaeological Science: Reports, 2018
Abstract Sourcing studies usually focus on interpreting movement from source to place of deposition. These studies typically use materials like obsidian that lend themselves to chemical characterization. Less attention has been paid to sourcing materials that are also abundant in the archaeological record such as ceramics.
Joshua J. Emmitt, Andrew J. McAlister, Rebecca S. Phillipps, Simon J. Holdaway   +3 more
openaire   +2 more sources

Compost salinity assessment via portable X-ray fluorescence (PXRF) spectrometry

Waste Management, 2018
Compost salinity is an ongoing concern for compost producers, especially with certain feedstocks and in arid or semiarid regions. Current testing protocols call for sampling and testing ex-situ via 1:5 (w/v) slurries via electrical conductance. For this research an alternate approach has been proposed, the use of portable X-ray fluorescence (PXRF ...
David C, Weindorf, Somsubhra, Chakraborty, Bin, Li, Sanjit, Deb, Atinderpal, Singh, Nana Y, Kusi   +5 more
openaire   +2 more sources

Soil horizon delineation using vis-NIR and pXRF data

CATENA, 2019
Abstract In this study, we evaluate the use of visible-near infrared (vis-NIR) and portable X-ray fluorescence (pXRF) for delineating soil horizons and how these are affected by soil moisture in a Mollisol (A, Ab, 2E, and 2Bt) profile of south-central Wisconsin.
Yakun Zhang, Alfred E. Hartemink
openaire   +1 more source

Elemental assessment of vegetation via portable X-ray fluorescence (PXRF) spectrometry

Journal of Environmental Management, 2018
Elemental concentrations in vegetation are of critical importance, whether establishing plant essential element concentrations (toxicity vs. deficiency) or investigating deleterious elements (e.g., heavy metals) differentially extracted from the soil by plants.
Candice McGladdery, David C. Weindorf, Somsubhra Chakraborty, Bin Li, Laura Paulette, Dorina Podar, Delaina Pearson, Nana Yaw O. Kusi, Bogdan Duda   +8 more
openaire   +3 more sources

pXRF in tropical soils: Methodology, applications, achievements and challenges

2021
Abstract Proximal sensors have been increasingly used for a variety of purposes worldwide, with great interest on portable X-ray fluorescence (pXRF) spectrometry applications in Soil Science. pXRF provides rapid, inexpensive, non-destructive, and environmentally-friendly elemental analysis in soils, rocks, sediments, plant tissues, water, and other ...
openaire   +1 more source

Handheld Portable Energy-Dispersive X-Ray Fluorescence Spectrometry (pXRF)

2016
Handheld portable energy-dispersive X-ray fluorescence (pXRF) spectrometry is used for non-destructive chemical characterization of archaeological ceramics. Portable XRF can provide adequate analytical sensitivity to discriminate geochemically distinct ceramic pastes, and to identify compositional clusters that correlate with data patterns acquired by ...
openaire   +1 more source