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Found 28 results.

CRM-geothermal - geochemical results of drill core material, scaling and salt precipitates at Tuzla, Seferihisar and Dikili geothermal sites, Eastern Turkey

The EU funded project CRM-geothermal aims to establish an overview of the potential for critical raw materials (CRM) in geothermal fluids across the EU and third countries (Ref). Within this framework, the geothermal sites of Tuzla, Seferihisar and Dikili in eastern Turkey have been visited in March 2023. To estimate the potential of CRM at these sites, a comprehensive sampling program was performed. Rock samples (drill gravel) of the production borehole and scaling from gas-water separators were obtained. Furthermore, sampling of geothermal fluids (gas and brine) and precipitates (salt) along the production line was performed. Here, the results of the geochemical analyses of solid sample materials (drill gravel, scales and salt) are presented. All analyses were performed in the ElMiE-Lab (Elements and Minerals of the Earth Laboratory) at German Research Centre for Geosciences Potsdam, Germany (https://labinfrastructure.geo-x.net/laboratories/8). For their major and minor element compositions, bulk samples of drill gravel and scales were analyzed with XRF and ICP-MS, respectively. Salt precipitates were analyzed for dry loss and mineral composition using XRD.

Whole rock geochemical analyses (major and trace elements, REE) of Neoproterozoic turbiditic greywackes (Lausitz Group), Cadomian anatexitic rocks, and granodiorites (Saxo-Thuringia, Germany)

The data presented are whole rock geochemical analyses (major and minor elements, REE), of Neoproterozoic turbiditic greywackes, Cadomian anatexitic rocks with metabasaltic inclusions, and post-collisional granodiorites. The data publication presents geochemical classification of the source regions of greywacke outcrops across the Lusatian massif, supported by microscopic lithoclast analysis. Discrimination further served to evaluate formerly assumed different geotectonic settings during age-different orogenic processes in the Western, as well as in the Eastern part of Lusatia. This was applied to the turbiditic greywackes, adjacent anatectic to granodioritic rocks, and mafic volcanogenic intercalations within the greywackes (tuffitic material) and the anatexites. Analyses with different methods (ICP, AAS, XRF, OES, WET) were made between 1987 and 1993 in different laboratories of the German Democratic Republic (GDR) and the early GFZ German Research Centre for Geosciences. Economical constraints limited the capacity of and access to labs, and also available techniques in the GDR - limiting the spectrum of elements to be analysed, especially that of REE, as well. Switching from lab to lab (see table) became a necessary tool. Despite these problems, all data proved to be comparable. This also applies to data from later used techniques (ICP, from 1991 on) on some additional sample material, regardless of its higher resolution. In few cases, detection limits have not been been communicated. The data are reported with the EarthChem Templates (https://doi.org/10.26022/IEDA/112263) and as original data tables. The data description is provided in English and German. German title: Gesamtgesteins-Geochemie (Haupt-/Spurenelemente, REE) an neoproterozoischen Grauwacken (Lausitz-Gruppe), Cadomischen Anatexiten und Granodioriten (Saxothuringia, Deutschland)

U-Pb age, whole rock and mineral composition of the Angicos Plutonism (Angicos Batholith and Poço da Oiticica Stock) from northern Borborema Province, NE Brazil

This dataset comprises new chemical, isotopic and geochronological analyses for 14 samples from the Angicos Plutonism (Angicos Batholith and Poço da Oiticica Stock) from northern Borborema Province, NE Brazil. Whole rock major and trace element compositions as well as mineral oxide compositions for feldspars, biotite, and Fe-oxides. New analyses on 14 samples are presented in the bulk and in-situ data templates developed by EarthChem. A compilation of all new analyses and previous whole-rock data from Jardim de Sá (1994) are also provided. Analyses were carried out at the Geoanalítica Core Facility at the Instituto de Geociências, University of São Paulo, Brazil. The data are reported with the EarthChem/ DIGIS data templates (IEDA, 2022).

XRF core scanning data spanning the late MIS 6 to MIS 1 from Füramoos, Southern Germany

High-resolution XRF core scanning data (K/Al and Si/Ti) spanning the late MIS 6 to MIS 1 from Füramoos in Southern Germany at an average temporal resolution of ~45 years. Si/Ti is used to identify phases of increased precipition of biogenic silica (primarily diatoms). K/Al is primarily interpreted as a proxy for precipitation and utilizes two characteristics: (a) K is far more easily water soluble than Al and thus easier transported into the basin during periods of high weathering intensity, and (b) high Al is associated with increased dust transport into the basin. Thus, high K and low Al are interpreted as wet conditions, whereas low K and high Al stand fro dry periods. Our XRF-CS data indicate millennial-scale climate oscillations associated with Greenland Interstadials / Dansgaard-Oeschger Events during MIS 3 and 4 and are used to support the palynological data of the same study.

Mo, Sr, Nd isotopes and major and trace element concentrations for lavas and enclaves from Solander Volcano, basement rocks and one altered oceanic basalt

Other

Noble metals, major and minor elements in modern and pre-historic lavas of Tolbachik volcano

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).

Estimated adjusted depth of CO2 of FB2001 drill core from Messel

This table contains atmospheric CO2-estimates based on stomata retrieved in the Messel fossil pit and published by Grein (2010) and Grein et al. (2011). The data is based on leaves retrieved from the Messel fossil pit (earliest Middle Eocene; 47.66 to 47.22 Ma). The leaves were microscopically analysed for their stomata density and which was then converted into atmospheric CO2 content (cf. Grein 2010, Grein et al., 2011 for details about the algorithm). The plant fossils were listed with their original outcrop depth which was marked down relative to marker beds. We projected the outcrop depth (m) onto the FB2001 drill core depth using the marker beds as reference horizons. The age (Ma) as well as mean, maximum and minimum of the CO2 estimates are reported as well as the respective plant species.

Recurrence times of siderite layers of FB2001 drill core from Messel

To investigate variability and drivers of extreme precipitation events under high greenhouse gas concentrations prevalent during the Eocene we computed recurrence times of Fe/Ti peaks in the XRF scanning record of FB2001, reflecting siderite layers that are interpreted to reflect strong precipitation events. Fe/Ti-peaks were detected based on a peak-detection algorithm, followed by counting over a sliding window. Recurrence times were calculated based on the number of Fe/Ti peaks per 5 ka window. Upper and lower boundaries of recurrence times are calculated based on bootstrapping. The record covers the period 47.66 to 47.22 Ma

Mean Annual Air Temperatures of FB2001 drill core from Messel

This table contains Mean Annual Temperatures (MAT) reconstructed using branched GDGTs obtained on core FB2001 from Messel (earliest Middle Eocene; 47.66 to 47.22 Ma), relative to the core depth and age. The error given reflects the calibration error. Samples from the depth interval 17.38 to 30.88 m were analyzed in Frankfurt by high-performance liquid chromatography coupled to atmospheric pressure chemical ionization mass spectrometry (HPLC-APCI-MS) on a Shimadzu UFLC device coupled to an AB Sciex 3200QTrap. Samples from the interval between 35.94 to 70.94 m core analyzed at RWTH Aachen University, Aachen (Germany), using an Agilent 1260 Infinity II HPLC coupled to an Agilent LC/MSD XT mass spectrometer.

XRF Fe/TI and K/Ti ratios of FB2001 drill core from Messel

The data contains Fe/Ti and K/Ti ratios obtained via XRF core scanning of drill core FB2001 from the Messel fossil pit (earliest Middle Eocene; 47.66 to 47.22 Ma) versus core depth and age. Scanning was performed at the Institute of Institute of Earth Sciences, Heidelberg University (Germany), with an Avvatech (Gen. IV) X-Ray Fluorescence Scanner. The purpose of this analysis was to objectively detect and quantify the occurrence of siderite layers in the Messel oil shale. These siderite layers are interpreted to represent extreme precipitation events.

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