Full element (major elements, minor elements, platinum-group elements and gold) analysis of high- and low-Mg lavas from several eruptions of Tolbachik volcano, Kamchatka, Russia. Eruptions include 2012-13, 1975-76, 1941 and several recent prehistoric (<1400 years old) eruptions. Major elements were measured by XRF, minor elements by ICP-MS and platinum-group elements and gold were measured using Ni-sulfide fire assay and ICP-MS. All analyses were undertaken at Geoscience Laboratories (Geo Labs) Ontario Geological Survey in 2019. These data were originally published as a supplement to Kutyrev et al. (2021), Noble Metals in Arc Basaltic Magmas Worldwide: A Case Study of Modern and Pre-Historic Lavas of the Tolbachik Volcano, Kamchatka, In Frontiers in Earth Science (9), https://doi.org/10.3389/feart.2021.791465.
This work was funded by the Ministry of Science and High Education of the Russian Federation (Grant No 075-15-2019-1883), The National Research Foundation (NRF) of the Korean government (No. 2019R1A2C1009809A) and the Russian Science Foundation (Grant #21-17-00122).
This database contains major and trace element compositions of European tephra and metadata for the datasets and lakes they were found in. It was created by collecting data from scientific literature to support the synchronisation of annually-resolved lake sediment records during the Last Glacial Interglacial Transition (25 ka BP to 8 ka BP).
49 individual tephra layers across 19 varved lake records have been included, with Lago di Grande Monticchio being the largest contributor of geochemical data with 28 layers. The Vedde Ash and Laacher See tephra are the most common layers, being found in 6 different varved records, and highlight the potential of refining the absolute age estimates for these tephra layers using varve chronologies and for synchronising regional paleoclimate archives.
This project is the first stage in a 5-years plan funded by the Past Global Changes (PAGES) Data Stewardship Scholarship to incorporate a global dataset of tephra geochemical data in varved sediment records. Further stages of this project will focus on different regions and timescales.
Global geochemistry database for cratonic / anorogenic lamproites and related potassic rocks (compiled and screened from GEOROC in April 2020).
Related key publication: Ngwenya, Ntando S.; Tappe, Sebastian (2021): Diamondiferous lamproites of the Luangwa Rift in central Africa and links to remobilized cratonic lithosphere. Chemical Geology. https://doi.org/10.1016/j.chemgeo.2020.120019