scholarly journals Investigation of quartz ESR residual signals in the last glacial and early Holocene fluvial deposits from the Lower Rhine

2021 ◽  
Author(s):  
Marcus Richter ◽  
Sumiko Tsukamoto
Keyword(s):  
Mean Value ◽  
Recovery Ratio ◽  
Fluvial Sediments ◽  
Recovery Test ◽  
Fluvial Deposits ◽  
Modern Analogue ◽  
Spin Resonance ◽  
Sensitivity Change ◽  
The Last Glacial ◽  
Lower Rhine

Abstract. In this study, we examined the residual doses of the quartz electron spin resonance (ESR) signals from eight young fluvial sediments with known luminescence ages from the lower Rhine terraces. The single aliquot regenerative (SAR) protocol was applied to obtain the residual doses for both the Aluminium (Al) and Titanium (Ti) impurity centres. We show that all of the fluvial samples carry a significant amount of residual dose with a mean value of 1350 ± 120 Gy for the Al centre, 610 ± 60 Gy for the lithium-compensated Ti centre (Ti-Li), 170 ± 20 Gy for the hydrogen-compensated Ti centre (Ti-H), and 470 ± 50 Gy for the signal originated from both the Ti-Li and Ti-H centres (termed Ti-mix). To test the accuracy of the ESR SAR protocol, a dose recovery test was conducted and this confirmed the validity of the Ti-Li and Ti-mix signal results. The Al centre shows a dose recovery ratio of 1.74 ± 0.16, probably due to a sensitivity change by the thermal treatment in the SAR procedure, whereas the Ti-H signal shows a ratio of 0.56 ± 0.17. The results of this study suggest that fluvial sediments carry a significant residual dose, and therefore the subtraction of residual dose using a modern analogue is highly recommended to obtain reliable ESR ages.

Luminescence dating of Last Glacial and Early Holocene fluvial deposits from the Lower Rhine methodological aspects and chronological framework

2011 ◽  
Vol 162 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Tobias Lauer ◽  
Manfred Frechen ◽  
Josef Klostermann ◽  
Matthias Krbetschek ◽  
Georg Schollmayer ◽  
...  
Keyword(s):  
Early Holocene ◽  
Luminescence Dating ◽  
Fluvial Deposits ◽  
Last Glacial ◽  
Methodological Aspects ◽  
Lower Rhine

scholarly journals Climate evolution during the Pleniglacial and Late Glacial as recorded in quartz grain morphoscopy of fluvial to aeolian successions of the European Sand Belt

Geologos ◽  
2015 ◽  
Vol 21 (2) ◽  
pp. 89-103 ◽  
Author(s):  
Barbara Woronko ◽  
Paweł Zieliński ◽  
Robert Jan Sokołowski
Keyword(s):  
Late Glacial ◽  
Sediment Supply ◽  
Alluvial Fans ◽  
Fluvial Sediments ◽  
Aeolian Processes ◽  
River Terraces ◽  
Climate Evolution ◽  
Quartz Grains ◽  
The Last Glacial

Abstract We present results of research into fluvial to aeolian successions at four sites in the foreland of the Last Glacial Maximum, i.e., the central part of the “European Sand Belt”. These sites include dune fields on higher-lying river terraces and alluvial fans. Sediments were subjected to detailed lithofacies analyses and sampling for morphoscopic assessment of quartz grains. Based on these results, three units were identified in the sedimentary succession: fluvial, fluvio-aeolian and aeolian. Material with traces of aeolian origin predominate in these sediments and this enabled conclusions on the activity of aeolian processes during the Pleniglacial and Late Glacial, and the source of sediment supply to be drawn. Aeolian processes played a major role in the deposition of the lower portions of the fluvial and fluvio-aeolian units. Aeolian material in the fluvial unit stems from aeolian accumulation of fluvial sediments within the valley as well as particles transported by wind from beyond the valley. The fluvio-aeolian unit is composed mainly of fluvial sediments that were subject to multiple redeposition, and long-term, intensive processing in an aeolian environment. In spite of the asynchronous onset of deposition of the fluvio-aeolian unit, it is characterised by the greatest homogeneity of structural and textural characteristics. Although the aeolian unit was laid down simultaneously, it is typified by the widest range of variation in quartz morphoscopic traits. It reflects local factors, mainly the origin of the source material, rather than climate. The duration of dune-formation processes was too short to be reflected in the morphoscopy of quartz grains.

scholarly journals Fluvial deposits as a record for Late Quaternary neotectonic activity in the Rhine-Meuse delta, The Netherlands

2002 ◽  
Vol 81 (3-4) ◽  
pp. 389-405 ◽  
Author(s):  
K.M. Cohen ◽  
E. Stouthamer ◽  
H.J.A. Berendsen
Keyword(s):  
Late Quaternary ◽  
Maximum Displacement ◽  
Movement Rates ◽  
Fluvial Deposits ◽  
Neotectonic Activity ◽  
Roer Valley Graben ◽  
Longitudinal Profiles ◽  
Late Weichselian ◽  
Lower Rhine Embayment ◽  
Lower Rhine

AbstractNeotectonic movements have caused differential subsidence in the Lower Rhine Embayment during the Quaternary. The Late Weichselian and Holocene Rhine-Meuse fluvial archive in the central Netherlands was used to quantify neotectonic movements in a setting that was primarily controlled by sea-level rise and climate change. Evidence for neotectonic activity in the central Netherlands is reviewed. Sedimentary evidence shows that fluvial deposits of Late Weichselian and Holocene Rhine and Meuse (Maas) distributaries are vertically displaced along the northern shoulder of the Roer Valley Graben system. Elevation differences in the longitudinal profiles of Late Weichselian terrace deposits were used to quantify tectonic displacements. New results for the southeastern Rhine-Meuse delta (Maaskant area) show that displacements in the top of the Pleniglacial terrace along the Peel Boundary Fault are up to 1.4 m. The maximum displacement between the Peel Horst and the Roer Valley Graben is 2.3 m. This is equivalent to relative tectonic movement rates of 0.09-0.15 mm/yr, averaged over the last 15,000 years.

scholarly journals Alpine permafrost thawing during the Medieval Warm Period identified from cryogenic cave carbonates

2013 ◽  
Vol 7 (4) ◽  
pp. 1073-1081 ◽  
Author(s):  
M. Luetscher ◽  
M. Borreguero ◽  
G. E. Moseley ◽  
C. Spötl ◽  
R. L. Edwards
Keyword(s):  
Western Alps ◽  
Convincing Evidence ◽  
Water Infiltration ◽  
Exact Nature ◽  
Glacial Period ◽  
Calcite Precipitation ◽  
Last Glacial Period ◽  
Last Glacial ◽  
Modern Analogue ◽  
The Last Glacial

Abstract. Coarse crystalline cryogenic cave carbonates (CCCcoarse) dated to the last glacial period are common in central European caves and provide convincing evidence of palaeo-permafrost during this time. Little is known, however, about the exact nature of the environment in which CCCcoarse formed as no modern analogue setting is known. Here, we report the first findings of sub-recent, albeit inactive, CCCcoarse from a cave of the Western Alps which is located in the present-day permafrost zone. The globular shape and the presence of ubiquitous euhedral crystal terminations are comparable to previously reported aggregates from the last glacial period and strongly suggest that these aggregates formed subaqueously in pools lacking agitation. Furthermore, stable isotope values of mm-sized spheroids point to calcite precipitation in a closed system with respect to CO2, strongly supporting the hypothesis of a cryogenic origin associated with the freezing of water ponds. U-series analyses revealed three clusters of late Holocene calcite precipitation intervals between 2129 and 751 a b2k. These ages correlate with known periods of elevated summer temperatures, suggesting that warming and thawing of the frozen catchment above the cave allowed water infiltration into the karst system. The growth of CCCcoarse resulted from the re-freezing of this water in the still cold karst cavities.

scholarly journals Infrared radiofluorescence (IR-RF) dating of middle pleistocene fluvial archives of the Heidelberg Basin (Southwest Germany)

2011 ◽  
Vol 38 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Tobias Lauer ◽  
Matthias Krbetschek ◽  
Manfred Frechen ◽  
Sumiko Tsukamoto ◽  
Christian Hoselmann ◽  
...  
Keyword(s):  
Sediment Cores ◽  
Middle Pleistocene ◽  
Upper Rhine Graben ◽  
Fluvial Sediments ◽  
Fluvial Deposits ◽  
Core Depth ◽  
Time Periods ◽  
Fluvial Archives ◽  
Upper Rhine ◽  
Southwest Germany

AbstractThe infrared radiofluorescence (IR-RF) dating technique was applied to eight fluvial samples that were collected from two sediment cores at the Heidelberg Basin located near Viernheim and Ludwigshafen in southwest Germany. Based on the IR-RF derived ages of the samples it was possible to establish a chronological framework for the Mid-Pleistocene fluvial deposits of the Heidelberg Basin. The results allow us to distinguish between four main periods of aggradation. The lowermost sample taken from 100 m core depth lead to an IR-RF age of 643 ± 28 ka pointing to a Cromerian period of aggradation (OIS 17–16). For the Elsterian it is now possible to distinguish between two aggradation periods, one occurring during the Lower Elsterian period (OIS 15) and a second during the Upper Elsterian period (OIS 12–11). For the so called Upper interlayer (or “Oberer Zwischenhorizont” — a layer of organic-rich and finer-grained deposits), the IR-RF results point to a deposition age of around 300 ka, with samples taken directly on top and out of this layer yielding IR-RF ages of 288 ± 19 ka and 302 ± 19 ka, respectively. Hence, the measured IR-RF ages clearly point to a deposition during the Lower Saalian period (OIS 9–8) whereas earlier studies assumed a Cromerian age for the sediments of the Upper Interlayer based on pollen records and also mollusc fauna. The new IR-RF dataset indicates that significant hiatuses are present within the fluvial sediment successions. In particular the Eemian and Upper Saalian deposits are missing in this part of the northern Upper Rhine Graben, as the 300 ka deposits are directly overlain by Weichselian fluvial sediments. It is obvious that time periods of increased fluvial aggradation were interrupted by time periods of almost no aggradation or erosion which should have been mainly triggered by phases of increased and decreased subsidence of the Heidelberg Basin.

scholarly journals Palaeoenvironmental data from fluvial deposits associated to ancient fishing weirs in the Miño river, NW Iberia

2020 ◽  
Vol 42 ◽  
pp. 53-68
Author(s):  
Jorge Sanjurjo-Sánchez ◽  
Carlos Arce-Chamorro ◽  
Víctor Barrientos ◽  
Ana Goy-Diz
Keyword(s):  
Organic Matter Content ◽  
Matter Content ◽  
Optically Stimulated Luminescence ◽  
Sedimentation Rates ◽  
Fluvial Sediments ◽  
Climate Fluctuations ◽  
Fluvial Deposits ◽  
The Past ◽  
Nw Iberia ◽  
Anthropogenic Processes

Fluvial sediments provide environmental records of the Quaternary. In some cases, fluvial deposits are caused by anthropogenic processes that cause changes in the water regime of some river stretches. This is the case of dams. It has been reported that some dams or partial damming systems existed in the past, at least from some thousands of years ago. Such dams were used for fishing purposes and are referred as fishing weirs. In a recently published work it has been demonstrated that a fluvial thick deposit was caused by a damming system in a river of NW Iberia (River Miño, Pontevedra). Optically stimulated luminescence (OSL) provided the burial age of such fluvial deposit, showing a 1300-year-old fluvial record. The sedimentation rates of the record did not match with known climate fluctuations in the area. In this work, the sedimentation phases of such record are identified, and the detrital and organic matter content is studied to assess any change occurred in the environmental and fluvial conditions during the deposition period of the record that ranges from 814±134 to 1837±11 AD.

Cosmogenic isotope burial dating of fluvial sediments from the Lower Rhine Embayment, Germany

2011 ◽  
Vol 6 (3-4) ◽  
pp. 313-325 ◽  
Author(s):  
Andreas Dehnert ◽  
Oliver Kracht ◽  
Frank Preusser ◽  
Naki Akçar ◽  
Hans Axel Kemna ◽  
...  
Keyword(s):  
Fluvial Sediments ◽  
Cosmogenic Isotope ◽  
Lower Rhine Embayment ◽  
Lower Rhine

scholarly journals Morphometric analysis of active normal faulting in slow-deformation areas : examples in the Lower Rhine Embayment

2001 ◽  
Vol 80 (3-4) ◽  
pp. 95-107 ◽  
Author(s):  
T. Camelbeeck ◽  
H. Martin ◽  
K. Vanneste ◽  
K. Verbeeck ◽  
M. Meghraoui
Keyword(s):  
The Netherlands ◽  
Last Glacial Maximum ◽  
Morphometric Analysis ◽  
Fault Scarp ◽  
Tectonic Activity ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
Lower Rhine Embayment ◽  
The Last Glacial ◽  
Lower Rhine

AbstractWe studied the applicability of classical scarp degradation modelling to active normal faults in the Lower Rhine Embayment. Our quantitative analysis was conducted on the frontal Bree fault scarp (Feldbiss fault) in Belgium and the Peel fault scarp near the city of Neer in the Netherlands. Vertical offset and diffusion age of these scarps have been modelled from elevation profiles across the studied faults using the diffusion equation. For that purpose, a computer-program (profil 2000) has been written, providing a sensitivity analysis of the determined parameters in function of the spatial repartition of the elevation measurements along the considered profiles. The results of this morphometric analysis have been validated by a comparison with the geologic record of the tectonic activity observed in the trenches excavated at the sites where the measurements have been conducted.We conclude that the modelling can only be applied to study tectonic activity since the Last Glacial Maximum (±14-19 kyr BP) because the surface expression of older paleoearthquakes in unconsolidated Late Pleistocene sediments has been erased by the strong erosive phase that occurred at the end of this glacial period. Even for Holocene scarps, morphologic dating seems very difficult because man-made perturbations destroyed surface evidence of the very recent fault activity in many sites. Nevertheless, we estimate that an appropriate value for the mass diffusivity constant for~ 1-m-high scarps in the investigated region is 0.002 to 0.010 m2/yr. On the other hand, vertical offsets can be determined with a good precision. These amount to respectively ~1 m and 1,3 m since the Last Glacial Maximum on the Feldbiss fault in Belgium and the Peel fault near Roermond in the Netherlands.

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