Geochemical and sedimentological record of sediment core ETL-C3 retrieved from Ea Tyn Lake (Central Highlands, Vietnam)


In March 2020, two parallel sediment cores ETL-C3 and ETL-C4 (12.38589°N, 107.95399°E) were recovered from Ea Tyn Lake (Vietnam) using a Livingston/Bolivia-style customized piston corer. The cores represent sequences of 1-m segments with a vertical offset of ~50 cm between cores to ensure a complete record without gaps between successive segments. The two cores were visually correlated based on marker layers producing an ETL master sequence with a total length of 877 cm (sedimentary units 1-14). The core was scanned at 1 cm resolution with an Avaatech X-ray Fluorescence (XRF) core scanner and the raw data presented here is displayed as element counts per second (cps). RGB colour values were taken with a digital line scan camera to depict colour variation with depth. RGB colors were tranformed into the CIELAB color space using convertColor in the R-package grDevices. Principal component analysis (PCA) was performed using the basic-R function prcomp. The chronology is based on 12 AMS radiocarbon (14C) dates derived from plant macrofossils and measured at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. The age-depth-model was produced based on the 12 14C dates and 4 137Cs dates using the R-package rbacon. The core sequence covers the last 1250 years cal BP and reflects long-term monsoon variability (Rb/Sr ratio) and drought events (PC2) in the throughout the respective time window of the core.

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Metadata Access
Creator Unkel, Ingmar ORCID logo; Nguyễn-Đình, Thái ORCID logo; Nguyễn-Thùy, Dương ORCID logo; Ojala, Antti E K; Schimmelmann, Arndt ORCID logo; Nguyễn-Văn, Hướng ORCID logo
Publisher PANGAEA
Publication Year 2023
Funding Reference Vietnam National University, Hanoi Crossref Funder ID QG.20.11 Holocene paleoclimate recorded from lake sediment in the south of Central Highlands
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 3 datasets
Discipline Earth System Research
Spatial Coverage (107.954 LON, 12.386 LAT)