Pore-water analyses of permafrost deposits from Lya_1999_R14+40, Bol'shoy Lyakhovsky Island in 1999 ...

• Main Authors: Schirrmeister, Lutz, Siegert, Christine
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Sample code/label; Height above sea level; Sediment type; pH; Conductivity, electrolytic; Calcium; Potassium; Magnesium; Sodium; Chloride; Nitrate; Sulfate; Bicarbonate ion; Comment; Multiple investigations; RU-Land_1999_Lyakhovsky; AWI Arctic Land Expedition; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.881501; https://doi.pangaea.de/10.1594/PANGAEA.881501

In order to get information about the pore-water characteristics from the dry samples, the water-soluble elements in the sediments were determined by shaking the samples with a proportionate amount of ultrapure water for a defined period of time. To obtain the water extracts, approximately 1 g of the freeze-dried sample was shaken for approximately 90 minutes in 50 ml centrifuge tubes with ultrapure water at a soil:water ratio of 1:25 using an overhead shaker (Gerhardt Laboshake). Then the suspension was centrifuged (Heraeus Multifuge 3s) at 4000 rpm for 15 minutes. The decanted extraction was filtered through a 0.45 µm cellulose acetate filter. We measured total dissolved elemental concentrations of Al, Ba, Ca, Fe, K, Mg, Mn, Na, P, Si, and Sr and anion concentrations of F-, Cl-, SO42-, Br-, NO3-, PO43-, and HCO3-.The element concentrations were analyzed using inductively coupled plasma-optical emission spectrometry (ICP-OES, Perkin-Elmer Optima 8300DV), while the anion content was determined by ion ...