Download Micro-XRF Studies of Sediment Cores: Applications of a by Ian W. Croudace, R. Guy Rothwell PDF

By Ian W. Croudace, R. Guy Rothwell

This quantity provides papers at the use of micro-XRF middle scanners in palaeoenvironmental study. It encompasses a wide ranging view of software power and issues to destiny advancements that might aid give a contribution to raised precision elemental information and swifter center research. Readers will discover a various diversity of analysis by means of best specialists that experience used micro-XRF center scanners in quite a lot of medical functions. The booklet comprises particular software papers reporting at the use of XRF middle scanners in numerous marine, lacustrine, and pollutants reviews. moreover, assurance additionally examines useful facets of middle scanner utilization, information optimisation and knowledge calibration and interpretation.

In a bit over a decade, micro-XRF sediment center scanners have made a sizeable contribution to palaeoenvironmental learn. Their effect is predicated on their skill to swiftly, non-destructively and instantly test sediment cores. not just do they quickly supply very important proxy information with out harmful samples, yet they could receive environmental facts at decadal, annual or even sub-annual scales. This quantity might help either skilled and new clients of those non-destructive middle scanners take complete benefit of some of the most robust geochemical screening instruments within the environmental scientist's toolbox.

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Additional info for Micro-XRF Studies of Sediment Cores: Applications of a non-destructive tool for the environmental sciences

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G. changing land use, pollution). A large number of element proxies have been recognised as important indicators of climate, weathering and erosion, redox conditions, organic productivity and water mass changes. Although the value of many of these proxies were recognised prior to the advent of XRF core scanners, these instruments have revolutionised our capability to extract high-resolution environmental data from sediment records. The Development of XRF Core Scanners—A Boon to the Environmental Sciences The recognition of climate change as a serious environmental and political concern from the 1980s onward and the growing collection of sediment cores for scientific research demanded fast, high-resolution instruments be developed to investigate environmental processes, particularly through element proxies.

The most widely used is direct linear calibration where WD-XRF analysis of discrete samples is plotted against counts on an element-by-element basis. g. changing water content, organic content and grain-size, together with bioturbation effects and due to pooling of water beneath anti-desiccation surface films used in some analyses) which can compromise calibration rigour. Weltje and Tjallingii (2008) demonstrate that robust quantitative calibration of XRF core scanner data is best made using log-ratios of intensities.

G. from tube ageing, physical property changes) whichever methodology is used. As XRF core scanning becomes increasingly widely used, it is pertinent to examine whether core scanner data can be transformed into more quantitative composition data. The main difference between core scanning and conventional WD-XRF analysis is that core scanning acquires data from wet sediment whereas conventional analysis is based on dry mass concentrations. Thus in water saturated sediments wet mass concentrations may only be a fraction of dry mass concentrations for a particular element.

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