DOI: 10.1594/pangaea.944177
title: Dataset of sediment analyses (pH, electrical conductivity, magnetic susceptibility, loss on ignition, and X-ray fluorescence) from the Tekkedere catchment in the Pergamon Micro-Region, western Turkey

description: The data support the interpretation of varying sediment facies and the reconstruction of the Mid-Late Holocene alluvial dynamics on the Tekkedere valley and the alluvial fan in the micro-region of an ancient city Pergamon, west Turkey (Yang et al. 2023). This dataset of sediment analyses was collected through the field work and laboratory measurements in the Bergama excavation house in 2019–2020. It comprises the geochemical and element composition of the sediment samples from seven sediment sequences (Tek-1, Tek-2, Tek-3, Tek-4-2, Tek-5, Tek-5-2 and Tek-6). Bulk geochemical sediment analyses include pH and electrical conductivity (EC) by a TDS/EC/pH/TEMP meter, mass magnetic susceptibility of low frequency (XLF) by Bartington magnetic susceptibility system (MS2B or MS3 sensor), and loss on ignition on 550 °C (LOI550) by temperature-controlled furnace. The element composition was analyzed using the p-XRF device. The data of sediment samples were recorded in Excel, calculated and illustrated in R software (version 3.6) (R Core Team, 2020) and imported into Inkscape software. The sample's depth is simplified by its middle depth. For the XLF measurement, the confidence intervals of the median are estimated by simple quantile bootstrapping (B = 1,000) in R. The sediment parameters of each sediment unit in this study are summarized in median and median absolute deviation (MAD, in brackets) which was calculated in R and they are descripted into 5 classes using the equal interval classification of the sediment parameters. Besides, we also summarize the sediment description guide during the field work and include the field photos of the sediment profiles from the alluvial fan.
description: The data contains 34 files, including 1 excel file of meta information, 1 R code for data calculation and illustration, 1 excel file of calculated/summarized data, 1 excel file of field description guide, 7 csv files of sediment profile raw data, 7 csv files of simplified data, 7 csv files of sediment unit boundary, 4 csv files of raw elemental components data from pXRF device, and 5 field photos.1. includes the information of event level, study area coverage, parameters.2. is the code used in R studio for calculation and illustration of the sediment parameters. Some values in the code may need to change manually according to the profile characters.3. is the results calculated and summarized from the above-mentioned R code. Simplified sediment parameter data and sediment unit boundary data are used in the code.4. summarizes the classes and details that are used during the field work, including the unit contact, fabric, clast feature, sorting, grain size, textural classification, mottling, concertation, carbonate/gypsum content, beds, erosional/post-depositional structures, soil features, biological modifications and archaeological findings and pH terms.5. includes the raw data of 14 samples from Tek-1 with the sampling range (upper and lower boundary), 1 time of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition, and 3 times of low frequency of magnetic susceptibility.6. includes the raw data of 11 samples from Tek-2 with the sampling range (upper and lower boundary), 2 times of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition, and 3 times of low frequency of magnetic susceptibility.7. includes the raw data of 19 samples from Tek-3 with the sampling range (upper and lower boundary), 1 time of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition, and 3 times of low frequency of magnetic susceptibility.8. includes the raw data of 32 samples from Tek-4-2 with the sampling range (upper and lower boundary), 1 time of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition.9. includes the raw data of 48 samples from Tek-5 with the sampling range (upper and lower boundary), 1 time of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition, 7 times of low frequency of magnetic susceptibility measured by MS2B sensor, and the element ratios of Ca/Ti and Zr/Rb.10. includes the raw data of 17 samples from Tek-5-2 with the sampling range (upper and lower boundary), 1 time of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition, and the element ratios of Ca/Ti and Zr/Rb.11. includes the raw data of 50 samples from Tek-6 with the sampling range (upper and lower boundary), 2 times of pH, 2 times of electrical conductivity (EC, us cm-1), the measurement weight of loss on ignition, 3 times of low frequency of magnetic susceptibility (only 41 samples), and the element ratios of Ca/Ti and Zr/Rb.12-18 files are the simplified data which are calculated from the raw data according to the corresponding equations.19-25 files are the sediment unit boundary based on the sediment features.26. is the raw data of sediment profile of Tek-5 exported from a portable energy-dispersive X-ray fluorescence spectrometer (p-ED-XRF; Thermo Fisher Scientific NITON XL3t) in the manufacture's "Mining Cu/Zn" mode with main, high, low, and light filters (50, 50, 15/20, and 8 kV, respectively) in a total of 120 seconds. A certified reference material (LKSD‐4) {Lynch, 1990 #1283} and an acid-purified silica sand were measured regularly to ensure the measurement quality.27. is the raw data of sediment profile of Tek-5-2 exported from the same p-ED-XRF device (Thermo Fisher Scientific NITON XL3t).28. is the raw data of sediment profile of Tek-6 exported from the same p-ED-XRF device (Thermo Fisher Scientific NITON XL3t).29. is the raw data of reference samples (a certified reference material (LKSD‐4, rf-2) {Lynch, 1990 #1283} and an acid-purified silica sand, si) exported from the same p-ED-XRF device (Thermo Fisher Scientific NITON XL3t).30-34 files are the 5 field photos from Tek-4, Tek-4-2, Tek-5, Tek-5-2 and Tek-6.