Geochemical analysis of tephra layers T1-T6 from Salar Grande, Atacama

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Title:Main Title: Geochemical analysis of tephra layers T1-T6 from Salar Grande, Atacama
Descriptions:Abstract: Geochemical analysis of tephra layers T1-T6, from Salar Grande site (20°59.862'S, 70°01.630'W). These data complement and support the results presented in the journal article "Identification of humid periods in the Atacama Desert through hillslope activity established by infrared stimulated luminescence (IRSL) dating". Medialdea et al., 2019. Global and Planetary Change.
Table Of Contents: Glass shards from the six volcanic ash horizons (T1-T6) interbedded in the investigated profile were concentrated from the samples by sieving <25 µm and >125 µm, magnetic separation (FRANTZ), and density separation 2.3-2.5 Glass concentrates were mounted on epoxy pucks, polished, and subsequently carbon coated prior to analysis. The elemental composition of individual glass shards and secondary reference materials Lipari obsidian (Kuehn et al., 2011) and MPI-DING ATHO-G reference rhyolitic glass (Jochum et al., 2006) is determined by wavelength-dispersive electron probe microanalysis (EPMA). Analyses were conducted using a JEOL JXA-8900RL EPMA at the University of Cologne equipped with a five-wavelength dispersive spectrometer, which was set to 12 keV accelerating voltage, 6 nA beam current, and 5 µm beam diameter, respectively. Elemental compositions are normalized to 100% anhydrous and volatile-free totals (Cl, SO3, and F). Full details on the analytical results can be found in the table.
Identifier:10.5880/CRC1211DB.31 (DOI)
Responsible Party
Creators:Volker Wennrich (Author), Alicia Medialdea (Author), Matthias May (Author), Dominik Brill (Author), Georgina King (Author)
Funding Reference:Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit
Publisher:CRC1211 Database (CRC1211DB)
Publication Year:2019
CRC1211 Topic:Dating
Related Subproject:D5
Subjects:Keywords: Chemistry of Mineral Surfaces, Geochronology, Quaternary Geology
File Details
Data Type:Dataset - Dataset
File Size:179 KB
Date:Available: 12.11.2019
Mime Type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Data Format:MS Excel
Download Permission:Free
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Specific Information - Data
Temporal Extent:15.03.2017, 13:00:00 - 15:30:00
Subtype:Natural Science Data
Metadata Details
Metadata Creator:Alicia Medialdea
Metadata Created:13.11.2019
Metadata Last Updated:13.11.2019
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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