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XRF Core Scanner and digital radiography

English title XRF Core Scanner and digital radiography
Applicant Anselmetti Flavio S.
Number 144960
Funding scheme R'EQUIP
Research institution Universität Bern
Institution of higher education University of Berne - BE
Main discipline Geology
Start/End 01.01.2013 - 31.12.2013
Approved amount 230'000.00
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All Disciplines (2)

Discipline
Geology
Geochemistry

Keywords (1)

Core scanning

Lay Summary (German)

Lead
Ein Röntgenfluoreszenz-Kernscanner mit digitaler Radiographie erlaubt hochaufgelöste chemische Elementanalysen von Sediment- und Gesteinsbohrkernen sowie anderen Archiven, wie Stalagmiten und Baumringen. Damit können zahlreiche Umwelt- und Klimaveränderungen rekonstruiert werden, die in der geochemischen Signatur der geologischen Archive gespeichert sind.
Lay summary

Das Messverfahren

Dieses Gerät misst an Sedimentbohrkernen mittels Röntgenfluoreszenz den semi-quantitativen Gehalt an chemischen Elementen. Der Sedimentkern wird dabei mit einer Auflösung von bis zu 0.1 mm der länge nach automatisch gescannt. Es können chemische Elemente gemessen werden, die schwerer als Aluminium sind. Zusätzlich kann mit der Röntgenquelle eine hochauflösende digitale Radiographie gemacht werden, welche analog zu medizinischen Röntgenbildverfahren ein Dichtebild des Sedimentkerns ergibt.

Anwendungen

Zahlreiche Bohrprojekte werden von diesem Gerät profitieren, im Speziellen im Zusammenhang mit der vom SNF unterstützten Mitgliedschaft in den internationalen Tiefbohrprogrammen (International Ocean Discovery Program - IODP; International Continental Scientific Drilling Program - ICDP). Sedimentbohrkerne aus Seen und Ozeanen sind wertvolle Archive die über vergangene Umwelt- und Klimaveränderungen aufschluss geben können. Sie zeichnen mit ihrer chemischen Zusammensetzung verschiedene Prozesse auf, so dass sie einen Blick in die prähistorische Umweltgeschichte erlauben. Mittels der XRF Daten wird es zum Beispiel möglich werden, vergangene Klimaschwankungen (Temperaturen, Niederschläge, Extremereignisse) zu rekonstruieren. Solche Paläoklimastudien werden in der Schweiz (speziell im Alpinen Raum) als auch im Ausland durchgeführt (z. Bsp. S-Amerika, Mittelmeerraum, Indonesien). Im weiteren lässt sich der Einfluss des Menschen auf die Umwelt aufzeichnen, da der menschliche Eingriff in die Natur sich häufig in der chemischen Elementzusammensetzung der geologischen Archive widerspiegelt.

Zusätzlich zu den Sedimentbohrkernen können auch die jährlichen Wachstumsringe von Bäumen (Dendrogeomorphologie) und Stalagmiten gemessen werden, deren Zusammensetzung ebenfalls vergangene Umwelt- und Klimaveränderungen aufzeichnen.


Direct link to Lay Summary Last update: 12.02.2013

Responsible applicant and co-applicants

Publications

Publication
A new model evaluating Holocene sediment dynamics: Insights from a mixed carbonate–siliciclastic lagoon (Bora Bora, Society Islands, French Polynesia, South Pacific)
Isaack Anja, Gischler Eberhard, Hudson J. Harold, Anselmetti Flavio S., Lohner Andreas, Vogel Hendrik, Garbode Eva, Camoin Gilbert F. (2016), A new model evaluating Holocene sediment dynamics: Insights from a mixed carbonate–siliciclastic lagoon (Bora Bora, Society Islands, French Polynesia, South Pacific), in Sedimentary Geology, 343, 99-118.
Frequency and intensity of palaeofloods at the interface of Atlantic and Mediterranean climate domains
Wilhelm B., Vogel H., Crouzet C., Etienne D., Anselmetti F. S. (2016), Frequency and intensity of palaeofloods at the interface of Atlantic and Mediterranean climate domains, in Climate of the Past, 12(2), 299-316.
Vegetation and fire history of coastal north-eastern Sardinia (Italy) under changing Holocene climates and land use
Beffa Giorgia, Pedrotta Tiziana, Colombaroli Daniele, Henne Paul D., van Leeuwen Jacqueline F. N., Süsstrunk Pascal, Kaltenrieder Petra, Adolf Carole, Vogel Hendrik, Pasta Salvatore, Anselmetti Flavio S., Gobet Erika, Tinner Willy (2016), Vegetation and fire history of coastal north-eastern Sardinia (Italy) under changing Holocene climates and land use, in Vegetation History and Archaeobotany, 25(3), 271-289.

Collaboration

Group / person Country
Types of collaboration
ETH Climate Geology Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Eawag, Surface Waters Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Palaeoecology Group, University of Utrecht Netherlands (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Brown University, Providence, RI, USA United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Associated projects

Number Title Start Funding scheme
120988 International Continental Scientific Drilling Program (ICDP) 01.01.2008 Research Infrastructure
140662 Validation and application of a novel, terrestrial biomarker-based paleo thermometer to Holocene Swiss lake sediments and soils 01.10.2012 Project funding (Div. I-III)
121666 Quantifying human impact and recent climate change using clastic sediments from lacustrine records in western Switzerland 01.02.2010 Project funding (Div. I-III)
129977 The drill hole "Niederweningen'09": Further insights into glaciation history and environmental evolution of overdeepened valleys in the northern Alpine Foreland, Switzerland 01.05.2010 Project funding (Div. I-III)
134616 Paleo-environmental and modeling insights into Mediterranean fire-vegetation interactions in response to Holocene climate and land use changes 01.12.2011 Project funding (Div. I-III)
183566 20,000 years of evolution and ecosystem dynamics in the world’s largest tropical lake reconstructed from sediment cores, fossils and ancient DNA 01.03.2019 Sinergia
117370 Drilling and Direct-Push Unit for Soil Sampling, Installation of Fluid-Sampling Units, and Soil Logging (Geoprobe) 01.09.2007 R'EQUIP
137930 FloodAlp! Frequency and intensity of extreme floods in the Alps through the Holocene and implications for natural hazards in future climate scenarios 01.12.2011 Project funding (Div. I-III)
143340 The Swiss contribution to the ICDP Lake Van Drilling Project: Linking modern seismic and biogeochemical signatures to 500,000 years of environmental history 01.01.2013 Project funding (Div. I-III)

Abstract

This R'Equip proposal seeks 50 % matching funds for acquisition of a XRF core-scanner, preferably with digital radiography option. This scanner will complement the core-scanning facility at the University of Bern consisting to date of a petrophysical multisensor core logger (MSCL Geotek) and a reflectance spectroscopy core scanner (Specim) through offering a high-resolution elemental scanner producing a wealth of geochemical data. The instrument uses an X-Ray source to determine semiquantitatively a full range of elements (Al and heavier) in a non-destructive fashion down to ppm levels in vertical core resolutions of up to 100 µm. One of the models, the Itrax instrument, furthermore offers a digital X-ray radiography option with a resolution of up to 20 µm. Main use of this instrument will be the continuous and high-resolution scanning of sediment cores to yield invaluable paleo-proxy data (e.g. climate, runoff, human impact). The same tool, however, will also be applied towards hardrock cores and other archives, such as speleothems and tree rings.To date, only one XRF core-scanner exists in Switzerland (ETHZ), which cannot cover the need for this analytical technique. Several projects of various Swiss research groups will start in the near future, which will produce hundreds of meters of drill cores that will be stored and analyzed in Switzerland. The instrument will be hosted at the University of Bern but would be available for all research groups in Switzerland working with drill cores or suitable samples. This new capacity, together with the novel radiography option, will provide urgently needed analytical infrastructure to exploit the upcoming core samples in a state-of-the-art manner. Key applications will be paleoclimatic and paleoenvironmental studies using lacustrine and marine sediment cores, incl. determinations of changes in detrital supply and erosional patterns, provenance studies, change in redox-state of sedimentary basin and signatures of anthropogenic pollution. The radiography option furthermore allows high-resolution density analysis that can be matched with XRF elemental data in order to investigate nature and origin of sedimentary structure and tree rings. In this proposal, we present 12 projects lead by groups from Universities of Bern, Geneva and Basel that all rely on this XRF core-scanning option.
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