Biogenic silica, total organic (TOC) and inorganic carbon (TIC) data of core Sardarya from southeast Iran


The proxy data reported here are measured from a sediment core collected from Lake Sardarya (28° 38' 03" N, 61° 00' 44" E, 2675 m a.s.l.) situated on the western slope of Taftan volcano, southeastern Iran. The core is 550 cm long and was collected in May 2017. To determine total organic (TOC) and inorganic carbon (TIC) contents, we used Fourier-transform infrared spectroscopy (FTIRS) analyses of the samples in a diffuse reflectance mode with a VERTEX 70 FTIRS spectrometer (BrukerOptik GmbH, Germany) equipped with a diffuse reflectance accessory (Praying Mantis Harrick Inc., USA). Sample pretreatment, IR spectroscopy measurement conditions and processing procedures applied to the raw spectra are described by Vogel et al. (2016). The pretreatment for all samples consisted of drying and grinding 50 mg smaller than 63 mm. Additionally, the Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analysis was used to estimate biogenic silica (BSi) content. For DRIFTS analyses, 11 (±0.1) mg of the sample was mixed with 500 (±0.5) mg of potassium bromide (KBr). Finally, the BSi content was determined using the calibration model by Meyer-Jacob et al. (2014), which is based on synthetic sediment mixtures with defined BSi concentrations.

Biogenic silica, total organic (TOC) and inorganic carbon (TIC): 77 samples, analysed at Dept. of Geosciences, University of Bremen (17.08.2017)

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Metadata Access
Creator Safaierad, Reza ORCID logo; Schefuß, Enno (ORCID: 0000-0002-5960-930X); Zolitschka, Bernd ORCID logo; Vogt, Christoph ORCID logo; Hahn, Annette (ORCID: 0000-0002-3647-473X); Yokoyama, Yusuke ORCID logo; Mohtadi, Mahyar ORCID logo
Publisher PANGAEA
Publication Year 2024
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints);
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 308 data points
Discipline Earth System Research
Spatial Coverage (61.012 LON, 28.634 LAT); Taftan volcano, southeast Iran