Dissolved and Particulate Major and Trace Elements in Newly Formed Ice from the Laptev Sea (Transdrift III, October 1995)

1999 ◽  
pp. 101-111 ◽  
Author(s):  
J. A. Hölemann ◽  
M. Schirmacher ◽  
A. Prange
Keyword(s):  
Trace Elements ◽  
Major And Trace Elements ◽  
Laptev Sea ◽  
The Laptev Sea

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

scholarly journals Composition of Sedimentary Organic Matter across the Laptev Sea Shelf: Evidences from Rock-Eval Parameters and Molecular Indicators

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3511
Author(s):  
Elena Gershelis ◽  
Andrey Grinko ◽  
Irina Oberemok ◽  
Elizaveta Klevantseva ◽  
Natalina Poltavskaya ◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Sediments ◽  
Continental Margins ◽  
Laptev Sea ◽  
Lena River ◽  
Nearshore Sediments ◽  
Rock Eval ◽  
Molecular Indicators ◽  
Sedimentation Regime ◽  
The Laptev Sea

Global warming in high latitudes causes destabilization of vulnerable permafrost deposits followed by massive thaw-release of organic carbon. Permafrost-derived carbon may be buried in the nearshore sediments, transported towards the deeper basins or degraded into the greenhouse gases, potentially initiating a positive feedback to climate change. In the present study, we aim to identify the sources, distribution and degradation state of organic matter (OM) stored in the surface sediments of the Laptev Sea (LS), which receives a large input of terrestrial carbon from both Lena River discharge and intense coastal erosion. We applied a suite of geochemical indicators including the Rock Eval parameters, traditionally used for the matured OM characterization, and terrestrial lipid biomarkers. In addition, we analyzed a comprehensive grain size data in order to assess hydrodynamic sedimentation regime across the LS shelf. Rock-Eval (RE) data characterize LS sedimentary OM with generally low hydrogen index (100–200 mg HC/g TOC) and oxygen index (200 and 300 CO2/g TOC) both increasing off to the continental slope. According to Tpeak values, there is a clear regional distinction between two groups (369–401 °C for the inner and mid shelf; 451–464 °C for the outer shelf). We suggest that permafrost-derived OM is traced across the shallow and mid depths with high Tpeak and slightly elevated HI values if compared to other Arctic continental margins. Molecular-based degradation indicators show a trend to more degraded terrestrial OC with increasing distance from the coast corroborating with RE results. However, we observed much less variation of the degradation markers down to the deeper sampling horizons, which supports the notion that the most active OM degradation in LS land-shelf system takes part during the cross-shelf transport, not while getting buried deeper.

A review of major and trace elements in Nile River and Western Red Sea sediments: An approach of geochemistry, pollution, and associated hazards

2021 ◽  
Vol 170 ◽  
pp. 109595
Author(s):  
Wael M. Badawy ◽  
Octavian G. Duliu ◽  
Hussein El Samman ◽  
Atef El-Taher ◽  
Marina V. Frontasyeva
Keyword(s):  
Trace Elements ◽  
Red Sea ◽  
Major And Trace Elements ◽  
Nile River

Results of permafrost modelling of the lowlands and shelf of the Laptev Sea Region, Russia

2001 ◽  
Vol 12 (2) ◽  
pp. 191-202 ◽  
Author(s):  
Nikolai N. Romanovskii ◽  
Hans-W. Hubberten
Keyword(s):  
Laptev Sea ◽  
The Laptev Sea

scholarly journals Data set of dissolved major and trace elements from the lacustrine systems of Clearwater Mesa, Antarctica

Data in Brief ◽  
2020 ◽  
Vol 30 ◽  
pp. 105438
Author(s):  
Karina L. Lecomte ◽  
Cecilia V. Echegoyen ◽  
Paula A. Vignoni ◽  
Kateřina Kopalová ◽  
Tyler J. Kohler ◽  
...  
Keyword(s):  
Trace Elements ◽  
Major And Trace Elements ◽  
Data Set
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