s/seltene-erden/Seltene Erden/gi
The Morro São João intrusion is located in the easternmost part of the Serra do Mar province, along the Cabo Frio lineament (Fig. 1) and has an area of approximately 10 km². It is a Late Cretaceous intrusion formed by clinopyroxenites, melagabbros, shonkinites, malignites, nepheline syenites, and phonolite dikes, without olivine, and is thought to have formed by closed system crystallization of a fairly evolved tephritic melt of potassic/ultrapotassic affinity (cf. Brotzu et al., 2007). We have analyzed two malignites, and specifically, their liquidus phases (clinopyroxene, titanite, garnet, amphibole). Analyzing the trace elements in these minerals helps us to better understand the different fractionation of the elements in these coexisting phases, and the implications for the evolution processes that occurred in the Morro São João magma reservoir. These analyses also provided important information about the concentration of rare earth elements (REEs) and high field strength elements (HFSEs), and their change with the magmatic evolution of the suite. This publication results from work conducted under the transnational access/national open access action at Mass spectrometry la-icp laboratory (IGG-CNR, Italy) supported by WP3 ILGE - MEET project, PNRR - EU Next Generation Europe program, MUR grant number D53C22001400005.
This work presents a Global dataset for combined mineral major and trace element data for rocks from the lower oceanic crust sampled along mid-ocean ridges worldwide. The dataset compiles mineralogical and geochemical data obtained from samples recovered along mid-ocean ridges characterized by a wide range of spreading rates, from fast-spreading to ultra-slow spreading ridges. It integrates published data from the scientific literature concerning the main mafic minerals of the lower oceanic crust, particularly olivine, plagioclase, and clinopyroxene, together with geological and geographical information related to the analysed samples. For each sample, the dataset includes details such as sampling location, oceanographic cruise, bibliographic reference, geographic coordinates, spreading rate, and sample lithology. The different worksheets contain average major element compositions and, where available, trace element data measured on crystal cores and rims. The dataset includes concentrations of major oxides, petrological parameters such as Fo# and Mg#, as well as trace element and rare earth element concentrations. The dataset was developed as a supporting tool for petrological, geochemical, and geodynamic studies aimed at improving the understanding of magmatic processes and the evolution of the lower oceanic crust along oceanic spreading centres.
The Limeira I kimberlite (91±6 Ma; Guarino et al., 2013) is part of the Alto Paranaíba Igneous Province (APIP) and was emplaced in the southern part of the São Francisco Craton in Brazil. This Kimberlite contains macrocrysts and phenocrysts of olivine, resorbed phlogopite/ tetraferriphlogopite, Al-free magnetite, chromite, magnesian ilmenite, rutile, perovskite, monticellite, apatite, serpentine and carbonate. It also contains a suite of xenocrysts and xenoliths (among which we recall wehrlite, phlogopite-ilmenite-websterite, olivine-ilmenite-glimmerite, clinopyroxenites bearing potassic-richterite, chromite-monticellite-kalsilite xenoliths, rutile with priderite or perovskite reaction rims, magnesian chromian ilmenite with perovskite rims). In this part of the project, we analyzed the xenocryst minerals and the main minerals found in the xenoliths entrapped in the Limeira I kimberlite. Analyzing the trace element concentrations in these minerals, helped us to better understand the processes that may occur in the subcontinental lithospheric mantle beneath the Alto Paranaíba Igneous Province. These analyses also provided important information about the minerals' enrichment in rare earth elements (REEs) and high field strength elements (HFSEs). This publication results from work conducted under the transnational access/national open access action at Mass spectrometry la-icp laboratory (IGG-CNR, Italy) supported by WP3 ILGE - MEET project, PNRR - EU Next Generation Europe program, MUR grant number D53C22001400005.
Der Beschaffungsleitfaden für Computer, Tastaturen und Computermäuse enthält die für öffentliche Auftraggeber wesentlichen Informationen und Empfehlungen, um Umweltaspekte in die Vergabe- und Vertragsunterlagen einzubeziehen. Er basiert auf den Kriterien des Umweltzeichens Blauer Engel für Computer, Tastaturen und Mäuse (DE-UZ 78, Ausgabe Juli 2024).Computer sind wesentliche Bestandteile der Informations- und Kommunikationstechnik (IKT). Deshalb sind sie in der heutigen Gesellschaft nicht mehr wegzudenken. Bei der Herstellung von Computern wird einerseits viel Energie eingesetzt. Andererseits werden zahlreiche Rohstoffe und Chemikalien benötigt, deren Gewinnung teilweise mit erheblichen Umweltauswirkungen verbunden ist. Bei den eingesetzten Rohstoffen handelt es sich beispielsweise um Materialien wie Seltenen Erden, Gold, Indium, Kobalt oder Tantal, deren Abbau und Verarbeitung mit erheblichen Risiken für Umwelt und Menschenrechte einhergehen.Eine Wirtschaft, die auf Ressourceneffizienz und Kreislaufführung setzt, sollte anstreben, dass Computer so lange wie möglich genutzt werden. So können die eingesetzten Rohstoffe optimal genutzt und der Einsatz von gefährlichen Chemikalien sowie Energie bei der Produktion minimiert werden.
We analyzed concentrations of dissolved and particulate trace metals, including iron (Fe), manganese (Mn), vanadium (V), molybdenum (Mo), thallium (Tl), and rare earth elements (REE), during a mesocosm-based phytoplankton summer bloom mimicking the intertidal zone of the southern North Sea (Jade Bay). The studies aimed to identify key drivers controlling their biogeochemical cycling in dynamic, high-productivity coastal environments. Our results highlight the tidally influenced coastal zone as a critical interface that alters the behavior of supposedly conservative elements such as Mo and Tl (Mori et al., 2021) as well as natural and anthropogenic REE (incl., lanthanum, samarium, and gadolinium) (Mori et al., 2026). Trace metal concentrations and shale-normalized REE patterns, determined by quadrupole inductively coupled plasma–mass spectrometry (ICP-MS) and inductively coupled plasma–optical emission spectrometry (ICP-OES), were combined with biogeochemical bulk parameters and pigment-based assessments of phytoplankton growth and community composition (Mustaffa et al., 2020). Trace metal and REE cycling were evaluated in relation to phytoplankton dynamics, particulate organic matter composition (C, N, P), dissolved organic carbon, total dissolved nitrogen, and macronutrient concentrations (nitrate, ammonium, silicate, and inorganic phosphate). The dataset was obtained during a Planktotron-based mesocosm experiment conducted within the framework of the Coastal Ocean Darkening project (Mustaffa et al., 2020).
Recycling von elektronischen Kleingeräten zur Gewinnung von seltenen Erden und Lithium, Maßnahmen zur Verstärkung des Recycling; Berichterstattung der Landesregierung im Ausschuss für Umwelt und Forsten
| Organisation | Count |
|---|---|
| Bund | 332 |
| Land | 17 |
| Weitere | 10 |
| Wirtschaft | 1 |
| Wissenschaft | 125 |
| Zivilgesellschaft | 12 |
| Type | Count |
|---|---|
| Chemische Verbindung | 4 |
| Daten und Messstellen | 16 |
| Ereignis | 2 |
| Förderprogramm | 286 |
| Text | 52 |
| Umweltprüfung | 1 |
| unbekannt | 31 |
| License | Count |
|---|---|
| Geschlossen | 57 |
| Offen | 333 |
| Unbekannt | 2 |
| Language | Count |
|---|---|
| Deutsch | 325 |
| Englisch | 94 |
| Resource type | Count |
|---|---|
| Archiv | 12 |
| Bild | 9 |
| Datei | 7 |
| Dokument | 23 |
| Keine | 180 |
| Webseite | 185 |
| Topic | Count |
|---|---|
| Boden | 332 |
| Lebewesen und Lebensräume | 273 |
| Luft | 186 |
| Mensch und Umwelt | 392 |
| Wasser | 147 |
| Weitere | 387 |