Fast application of X-ray fluorescence spectrometry aboard ship: how good is the new portable Spectro Xepos analyser?

Wien, Katharina; Wissmann, Dirk; Kölling, Martin; Schulz, Horst D

doi:10.1007/s00367-004-0206-x

Cited by 49 publications

(25 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Arrows represent mean paths of distributions of icerafted debris during glacial periods inferred by Ruddiman [1977]. [11] We verified the scanning XRF data from the splitcore sediment surface by analyzing dried, homogenized powders of 50 samples from Sites U1308 using a conventional XRF analyzer (Spectro Xepos EDPXRF) [Wien et al, 2005]. This method has been shown to be effective for calibrating scanning XRF data [Tjallingii et al, 2007].…”

Section: Xrf Analysismentioning

confidence: 90%

Onset of “Hudson Strait” Heinrich events in the eastern North Atlantic at the end of the middle Pleistocene transition (∼640 ka)?

et al. 2008

View full text Add to dashboard Cite

[1] Heinrich events are well documented for the last glaciation, but little is known about their occurrence in older glacial periods of the Pleistocene. Here we report scanning XRF and bulk carbonate d 18O results from Integrated Ocean Drilling Program Site U1308 (reoccupation of Deep Sea Drilling Project Site 609) that are used to develop proxy records of ice-rafted detritus (IRD) for the last $1.4 Ma. Ca/Sr is used as an indicator of IRD layers that are rich in detrital carbonate (i.e., Heinrich layers), whereas Si/Sr reflects layers that are poor in biogenic carbonate and relatively rich in detrital silicate minerals. A pronounced change occurred in the composition and frequency of IRD at $640 ka during marine isotope stage (MIS) 16, coinciding with the end of the middle Pleistocene transition. At this time, ''Hudson Strait'' Heinrich layers suddenly appeared in the sedimentary record of Site U1308, and the dominant period of the Si/Sr proxy shifted from 41 ka prior to 640 ka to 100 ka afterward. The onset of Heinrich layers during MIS 16 represents either the initiation of surging of the Laurentide Ice Sheet (LIS) off Hudson Strait or the first time icebergs produced by this process survived the transport to Site U1308. We speculate that ice volume (i.e., thickness) and duration surpassed a critical threshold during MIS 16 and activated the dynamical processes responsible for LIS instability in the region of Hudson Strait. We also observe a strong coupling between IRD proxies and benthic d 13 C variation at Site U1308 throughout the Pleistocene, supporting a link between iceberg discharge and weakening of thermohaline circulation in the North Atlantic.

show abstract

Section: Xrf Analysismentioning

confidence: 90%

Onset of “Hudson Strait” Heinrich events in the eastern North Atlantic at the end of the middle Pleistocene transition (∼640 ka)?

et al. 2008

View full text Add to dashboard Cite

show abstract

“…[9] The quality of the element intensities of the XRF core scanner was validated with chemical data of a conventional XRF analyzer (Spectro Xepos EDPXRF). The conventional XRF analyzer measures the elemental concentration from Magnesium (Mg, atomic number 12) through to Barium (Ba, atomic number 56) in g/kg and provides the sediment mass attenuation coefficient of every sample in cm 2 /g [Wien et al, 2005]. This XRF analyzer measures loosely packed powder samples ($4 g) prepared from freeze-dried and ground sediment [Wien et al, 2005].…”

Section: Methodsmentioning

confidence: 99%

“…The conventional XRF analyzer measures the elemental concentration from Magnesium (Mg, atomic number 12) through to Barium (Ba, atomic number 56) in g/kg and provides the sediment mass attenuation coefficient of every sample in cm 2 /g [Wien et al, 2005]. This XRF analyzer measures loosely packed powder samples ($4 g) prepared from freeze-dried and ground sediment [Wien et al, 2005]. The chemical element concentrations were determined with a sample resolution of 10 cm (164 samples in total).…”

Section: Methodsmentioning

confidence: 99%

Influence of the water content on X‐ray fluorescence core‐scanning measurements in soft marine sediments

Tjallingii

Röhl

Kölling

et al. 2007

Geochem Geophys Geosyst

Self Cite

381

342

View full text Add to dashboard Cite

[1] The X-ray fluorescence (XRF) core scanner provides bulk-sediment chemistry data measured nondestructively at the split core sediment surface. Although this method is widely accepted, there is little known about the effects of physical properties such as density and water content on XRF core scanner data. Comparison of XRF scanner measurements from the sediment surface and dry powder samples of sediment core GeoB7920 indicates strongly reduced element intensities for the lighter elements Al and Si. We relate the lower element intensities of the measurements taken at the sediment surface to the amount of water in the sample volume analyzed by the XRF core scanner. The heavier elements K, Ca, Ti, and Fe remain relatively unaffected by the variation of any physical property within sediment core GeoB7920. Additionally, we successfully use the elemental intensity of Cl as a proxy for the seawater content in the sample volume analyzed by the XRF core scanner. This enables the establishment of a correction function for the elements Al and Si that corrects for the radiation absorption of the water content in sediment core GeoB7920 off Cape Blanc, NW Africa.

show abstract

“…2). Because no SiO 2 data is available for the sample set of this study due to the sample preparation procedure, we used the SiO 2 (and related Al 2 O 3 and CaCO 3 ) datasets of surface sediments at 17 other sites which are available from the study area (Wien et al, 2005;Wien et al, 2006); Schulz and Kölling, unpublished datasets). The datasets are available at PANGAEA, a detailed overview about their positions and the related references are given in Appendix 3.…”

Section: Map Generationmentioning

confidence: 99%

Geochemical distribution patterns as indicators for productivity and terrigenous input off NW Africa

Plewa

Meggers

Kuhlmann

et al. 2012

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

a b s t r a c tOne hundred and twenty-eight surface-sediment samples collected off North-West Africa were studied geochemically to detect the expressions of different meridional climate regimes and zonal productivity gradients in the surface sediments. This geochemical multi-tracer approach, coupled with additional information on the bulk carbonate and TOC contents makes it possible to characterise the sedimentological regime in detail. Typical terrigenous elements like Al, K and Fe mirror the importance of the humid (fluvial) influence in the north of the study area and the dominance of aeolian input in the south. Furthermore, the distributions of Ti and Fe in the surface sediments serve as tracers for the supply of eolian volcanic material from the Canary Islands. The spatial variability of the TOC contents in the surface sediments closely follows the ocean surface productivity patterns, whereas the CaCO 3 contents are mainly controlled by dilution with terrigenous matter. The potential productivity proxy Ba is not a reliable tracer for productivity in this region, since it is mainly supplied by terrigenous input (coupled with aluminosilicates).

show abstract

Fast application of X-ray fluorescence spectrometry aboard ship: how good is the new portable Spectro Xepos analyser?

Cited by 49 publications

References 10 publications

Onset of “Hudson Strait” Heinrich events in the eastern North Atlantic at the end of the middle Pleistocene transition (∼640 ka)?

Onset of “Hudson Strait” Heinrich events in the eastern North Atlantic at the end of the middle Pleistocene transition (∼640 ka)?

Influence of the water content on X‐ray fluorescence core‐scanning measurements in soft marine sediments

Geochemical distribution patterns as indicators for productivity and terrigenous input off NW Africa

Contact Info

Product

Resources

About