cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.27887884
title: Petrogenesis and tectonic implications of peralkaline-metaluminous magmatism in Kila and Shira ring complexes, north-central Nigeria

description: Peralkaline-metaluminous felsic-intermediate rocks are differentiates of A-type magmatism. However, their origin, sometimes obscured by hydrothermal alteration, remains a longstanding puzzle. We present new whole-rock Nd-Hf isotope, zircon U-Pb, mineral chemistry, and whole-rock data of peralkaline aegirine ± arfvedsonite granites and metaluminous aegirine-arfvedsonite quartz syenite from the Shira and Kila ring complexes in north-central Nigeria that were less affected by hydrothermal alteration. The granites are geochemically alkalic and more enriched in Zr, Hf, Rb, Y, and Nb than the quartz syenite. The Shira peralkaline aegirine-arfvedsonite granites were emplaced at 199.5 ± 0.7 and 200.6 ± 1.0 Ma, while the Kila metaluminous aegirine-arfvedsonite quartz syenite was emplaced at 232.3 ± 0.98 Ma and aegirine granites at 202.3 ± 1.3 Ma. The Kila aegirine-granites exhibit weakly to moderately negative ɛHf(t) (−4.19 to −2.54) and ɛNd(t) (−3.92 to −0.38) values, similar to the aegirine-arfvedsonite quartz syenite (ɛHf(t) = –4.46 to −0.78, ɛNd(t) = –4.15). This suggests fractionation of intermediate melts from the enriched subcontinental lithospheric mantle (SCLM), with prior melt extraction and enrichment, exhibiting crustal contamination. The Shira aegirine-arfvedsonite granites exhibit near-zero to widely positive ɛHf(t) values (+0.47 to +15.03) and mildly positive ɛNd(t) values (+0.28 to +0.42), reflecting intermediate melt fractionation from a complexly depleted SCLM source with multiple extraction episodes and localized enrichment. The magmas evolved polybarically, fractionating high-pressure and H<sub>2</sub>O-saturated phases, including Mg-rich olivine, calcic amphibole, calcic pyroxene, plagioclase, and Fe-Ti oxides, leading to the depletion of MgO, CaO, and TiO<sub>2</sub>. Magma evolution occurred under low pressure (~1.6 kbar), high temperature (839–1065 °C), and reduced conditions. The transition to an extensional anorogenic regime induced lithospheric stresses, reactivating major shear zones and opening associated transcurrent faults, allowing the ascent of partially melted peralkaline-metaluminous magmas from the heterogenous SCLM, which crystallized at shallow (2.8 to 7.4 km) crustal depths.
DOI: 10.6084/m9.figshare.27958487
title: A review of geological characteristics and selenium enrichment in Se-bearing volcanogenic massive sulfide deposits

description: Volcanogenic massive sulphide (VMS) deposits consist of upper stratabound massive-to-semimassive sulphide lenses and discordant stringer sulphides in the footwall, hosting significant base metals like Zn, Cu, and Pb, with some enriched in precious (Ag, Au) and semi-metals (like Se and Te). Selenium occurs at low concentrations (0.05 ppm) in Earth’s crust and is critical for renewable energy technologies. Here, we have combined global Se-bearing VMS deposits to illustrate selenium occurrence, enrichment conditions, sources, and depositional environments. Selenium generally occurs as by-products of Cu-rich ores in VMS Cu–Zn or Cu–Au systems; no independent VMS selenium deposit has been reported worldwide. Selenium mineralization is mainly associated with sulphide minerals formed at high-temperature (~300°C) hydrothermal stages as a function of fluid temperature and can occur as Se minerals under highly oxidizing conditions related to supergene geological processes. Selenium-bearing sulphide minerals (like chalcopyrite) are the result of isomorphic substitutions of S by Se; Se contents generally show a decreasing trend from galena, chalcopyrite, sphalerite, pyrite, to pyrrhotite. Other Se-bearing minerals are dominated by roquesite, tellurium-minerals, and tetrahedrite. Selenium minerals are not common but can precipitate at favourable conditions in VMS systems, including native Se, clausthalite (PbSe), naumannite (Ag<sub>2</sub>Se), bohdanowiczite (AgBiSe<sub>2</sub>), eucairite (AgCuSe), and tiemannite (HgSe). Co-existence of galena – clausthalite and chalcopyrite (like at the Xiaorequanzi deposit in China) is due to locally elevated H<sub>2</sub>Se activities of hydrothermal fluids, and the intergrowth of sulphate and selenide minerals (like in VMS deposits in the Urals in Russia), as well as oxide and selenide mineral assemblages (like at the Apliki deposit in Cyprus) is produced by secondary enrichment processes. Worldwide Se-bearing VMS deposits typically occur in arc settings related to the initial subduction of oceanic plates; the addition of magmatic volatiles into the circulated hydrothermal fluids provide the necessary selenium for anomalous Se enrichment. In some cases, leaching of thick Se-bearing sedimentary rocks by evolved seawater in basins is a critical process accounting for Se mineralization endowment.
DOI: 10.6084/m9.figshare.27958487.v1
title: A review of geological characteristics and selenium enrichment in Se-bearing volcanogenic massive sulfide deposits

description: Volcanogenic massive sulphide (VMS) deposits consist of upper stratabound massive-to-semimassive sulphide lenses and discordant stringer sulphides in the footwall, hosting significant base metals like Zn, Cu, and Pb, with some enriched in precious (Ag, Au) and semi-metals (like Se and Te). Selenium occurs at low concentrations (0.05 ppm) in Earth’s crust and is critical for renewable energy technologies. Here, we have combined global Se-bearing VMS deposits to illustrate selenium occurrence, enrichment conditions, sources, and depositional environments. Selenium generally occurs as by-products of Cu-rich ores in VMS Cu–Zn or Cu–Au systems; no independent VMS selenium deposit has been reported worldwide. Selenium mineralization is mainly associated with sulphide minerals formed at high-temperature (~300°C) hydrothermal stages as a function of fluid temperature and can occur as Se minerals under highly oxidizing conditions related to supergene geological processes. Selenium-bearing sulphide minerals (like chalcopyrite) are the result of isomorphic substitutions of S by Se; Se contents generally show a decreasing trend from galena, chalcopyrite, sphalerite, pyrite, to pyrrhotite. Other Se-bearing minerals are dominated by roquesite, tellurium-minerals, and tetrahedrite. Selenium minerals are not common but can precipitate at favourable conditions in VMS systems, including native Se, clausthalite (PbSe), naumannite (Ag<sub>2</sub>Se), bohdanowiczite (AgBiSe<sub>2</sub>), eucairite (AgCuSe), and tiemannite (HgSe). Co-existence of galena – clausthalite and chalcopyrite (like at the Xiaorequanzi deposit in China) is due to locally elevated H<sub>2</sub>Se activities of hydrothermal fluids, and the intergrowth of sulphate and selenide minerals (like in VMS deposits in the Urals in Russia), as well as oxide and selenide mineral assemblages (like at the Apliki deposit in Cyprus) is produced by secondary enrichment processes. Worldwide Se-bearing VMS deposits typically occur in arc settings related to the initial subduction of oceanic plates; the addition of magmatic volatiles into the circulated hydrothermal fluids provide the necessary selenium for anomalous Se enrichment. In some cases, leaching of thick Se-bearing sedimentary rocks by evolved seawater in basins is a critical process accounting for Se mineralization endowment.
DOI: 10.6084/m9.figshare.27887884.v1
title: Petrogenesis and tectonic implications of peralkaline-metaluminous magmatism in Kila and Shira ring complexes, north-central Nigeria

description: Peralkaline-metaluminous felsic-intermediate rocks are differentiates of A-type magmatism. However, their origin, sometimes obscured by hydrothermal alteration, remains a longstanding puzzle. We present new whole-rock Nd-Hf isotope, zircon U-Pb, mineral chemistry, and whole-rock data of peralkaline aegirine ± arfvedsonite granites and metaluminous aegirine-arfvedsonite quartz syenite from the Shira and Kila ring complexes in north-central Nigeria that were less affected by hydrothermal alteration. The granites are geochemically alkalic and more enriched in Zr, Hf, Rb, Y, and Nb than the quartz syenite. The Shira peralkaline aegirine-arfvedsonite granites were emplaced at 199.5 ± 0.7 and 200.6 ± 1.0 Ma, while the Kila metaluminous aegirine-arfvedsonite quartz syenite was emplaced at 232.3 ± 0.98 Ma and aegirine granites at 202.3 ± 1.3 Ma. The Kila aegirine-granites exhibit weakly to moderately negative ɛHf(t) (−4.19 to −2.54) and ɛNd(t) (−3.92 to −0.38) values, similar to the aegirine-arfvedsonite quartz syenite (ɛHf(t) = –4.46 to −0.78, ɛNd(t) = –4.15). This suggests fractionation of intermediate melts from the enriched subcontinental lithospheric mantle (SCLM), with prior melt extraction and enrichment, exhibiting crustal contamination. The Shira aegirine-arfvedsonite granites exhibit near-zero to widely positive ɛHf(t) values (+0.47 to +15.03) and mildly positive ɛNd(t) values (+0.28 to +0.42), reflecting intermediate melt fractionation from a complexly depleted SCLM source with multiple extraction episodes and localized enrichment. The magmas evolved polybarically, fractionating high-pressure and H<sub>2</sub>O-saturated phases, including Mg-rich olivine, calcic amphibole, calcic pyroxene, plagioclase, and Fe-Ti oxides, leading to the depletion of MgO, CaO, and TiO<sub>2</sub>. Magma evolution occurred under low pressure (~1.6 kbar), high temperature (839–1065 °C), and reduced conditions. The transition to an extensional anorogenic regime induced lithospheric stresses, reactivating major shear zones and opening associated transcurrent faults, allowing the ascent of partially melted peralkaline-metaluminous magmas from the heterogenous SCLM, which crystallized at shallow (2.8 to 7.4 km) crustal depths.
DOI: 10.6084/m9.figshare.28099734
title: Material source, sedimentary environment, and mineralization process of Shengzhou diatomite deposit in Eastern Zhejiang Province, China

description: The Shengzhou diatomite deposit, located in the Shengzhou-Xinchang basin, is recognized as one of the largest diatomite deposits in China. The scanning electron microscopy (SEM-EDS), mineral compositions and elemental geochemistry of the samples were analysed to identify the nutrient sources, depositional environments, and mineralization process. Through scanning electron microscopy, the predominant diatom species observed are <i>Aulacoseira granulata (Ehrenberg) Simonsen</i> and <i>Cyclotella shengxianensis Huang and Cai</i>. The results of X-ray diffraction (XRD) analysis results indicate that the mineral composition of diatomite mainly consists of opal-A, quartz, clay minerals, feldspar, carbonate minerals, and pyrite. The results of XRF and ICP-MS analysis show that the content of SiO<sub>2</sub> ranges from 59.11% to 69.44%, and the trace nutrient elements such as Mo, U, V, Co, Ni, Cu, and Zn are enriched. The correlation of geochemical composition between diatomite and Cretaceous volcanic rocks in the study area indicates that the weathering of volcanic rocks provides nutrients for diatom growth. Multiple geochemical indicators (Sr/Ba, V/Cr, Ni/Co, U/Th, V/(V+Ni), C-value, CIA, and Sr/Cu) and palaeontological evidence indicate that the diatomite was formed in a freshwater, oxic, and hot-humid environment. As the diatomite is susceptible to denudation, the overlying basalt may protect the deposit.
DOI: 10.6084/m9.figshare.28099734.v1
title: Material source, sedimentary environment, and mineralization process of Shengzhou diatomite deposit in Eastern Zhejiang Province, China

description: The Shengzhou diatomite deposit, located in the Shengzhou-Xinchang basin, is recognized as one of the largest diatomite deposits in China. The scanning electron microscopy (SEM-EDS), mineral compositions and elemental geochemistry of the samples were analysed to identify the nutrient sources, depositional environments, and mineralization process. Through scanning electron microscopy, the predominant diatom species observed are <i>Aulacoseira granulata (Ehrenberg) Simonsen</i> and <i>Cyclotella shengxianensis Huang and Cai</i>. The results of X-ray diffraction (XRD) analysis results indicate that the mineral composition of diatomite mainly consists of opal-A, quartz, clay minerals, feldspar, carbonate minerals, and pyrite. The results of XRF and ICP-MS analysis show that the content of SiO<sub>2</sub> ranges from 59.11% to 69.44%, and the trace nutrient elements such as Mo, U, V, Co, Ni, Cu, and Zn are enriched. The correlation of geochemical composition between diatomite and Cretaceous volcanic rocks in the study area indicates that the weathering of volcanic rocks provides nutrients for diatom growth. Multiple geochemical indicators (Sr/Ba, V/Cr, Ni/Co, U/Th, V/(V+Ni), C-value, CIA, and Sr/Cu) and palaeontological evidence indicate that the diatomite was formed in a freshwater, oxic, and hot-humid environment. As the diatomite is susceptible to denudation, the overlying basalt may protect the deposit.
DOI: 10.6084/m9.figshare.27990580
title: Zircon U-Pb geochronology and Sr-Nd-Pb-Hf-O isotope signatures of Middle Eocene high-K plutons from the Eastern Pontides Orogenic Belt, NE Turkey: implications for parental magma sources and magmatic processes

description: The Eastern Pontides Orogenic Belt (EPOB) in northeastern Turkey is a well-preserved continental magmatic arc in the Alpine-Himalayan Orogenic Belt and contains many Eocene I-type high-K plutons. Employing LA-ICP-MS U-Pb zircon geochronology, the crystallization ages of the investigated Yaylalıköy and Taşbaşı plutons were established to be Lutetian (Middle Eocene), ranging from 47 Ma to 46 Ma. These plutons exhibit a compositional spectrum ranging from diorite to granodiorite, characterized by I-type, metaluminous, and high-K geochemical signatures. Notably, they are enriched in large-ion lithophile elements (LILEs) and light rare earth elements (LREEs), displaying pronounced negative Eu anomalies (Eu<sub>N</sub>/Eu* = 0.58–0.96). Isotopic signatures reveal homogeneous and moderately low initial <sup>87</sup> Sr/<sup>86</sup> Sr<sub>(i)</sub> ratios (0.704643–0.705034) and positive εNd<sub>(i)</sub> values (0.24 to 1.67) for the investigated plutons. These isotopic signatures are consistent with mantle origin, as evidenced by their position within the mantle array on isotope ratio diagrams. Lead isotope compositions exhibit limited variations, with initial ratios of <sup>206</sup> Pb/<sup>204</sup> Pb<sub>(i)</sub> (18.55–18.64), <sup>207</sup> Pb/<sup>204</sup> Pb<sub>(i)</sub> (15.61–15.64), and <sup>208</sup> Pb/<sup>204</sup> Pb<sub>(i)</sub> (38.46–38.75). Zircon εHf<sub>(i)</sub> values are positive (2.32–6.20), plotting between the depleted mantle and chondritic evolution lines. Additionally, these rocks display low zircon δ<sup>18</sup> O values (+4.54 to + 6.53‰), comparable to mantle composition. The petrographic characteristics of the investigated plutons suggest that fractional crystallization with minimal assimilation and/or magma mixing played a dominant role during their solidification. The integration of geochemical and isotopic data, alongside regional geological constraints, advocates for enriched lithospheric mantle as the source for the parental magmas of the studied plutons. These magmas subsequently underwent differentiation within a deep-seated magma chamber, followed by emplacement into the crust.
DOI: 10.6084/m9.figshare.27990580.v1
title: Zircon U-Pb geochronology and Sr-Nd-Pb-Hf-O isotope signatures of Middle Eocene high-K plutons from the Eastern Pontides Orogenic Belt, NE Turkey: implications for parental magma sources and magmatic processes

description: The Eastern Pontides Orogenic Belt (EPOB) in northeastern Turkey is a well-preserved continental magmatic arc in the Alpine-Himalayan Orogenic Belt and contains many Eocene I-type high-K plutons. Employing LA-ICP-MS U-Pb zircon geochronology, the crystallization ages of the investigated Yaylalıköy and Taşbaşı plutons were established to be Lutetian (Middle Eocene), ranging from 47 Ma to 46 Ma. These plutons exhibit a compositional spectrum ranging from diorite to granodiorite, characterized by I-type, metaluminous, and high-K geochemical signatures. Notably, they are enriched in large-ion lithophile elements (LILEs) and light rare earth elements (LREEs), displaying pronounced negative Eu anomalies (Eu<sub>N</sub>/Eu* = 0.58–0.96). Isotopic signatures reveal homogeneous and moderately low initial <sup>87</sup> Sr/<sup>86</sup> Sr<sub>(i)</sub> ratios (0.704643–0.705034) and positive εNd<sub>(i)</sub> values (0.24 to 1.67) for the investigated plutons. These isotopic signatures are consistent with mantle origin, as evidenced by their position within the mantle array on isotope ratio diagrams. Lead isotope compositions exhibit limited variations, with initial ratios of <sup>206</sup> Pb/<sup>204</sup> Pb<sub>(i)</sub> (18.55–18.64), <sup>207</sup> Pb/<sup>204</sup> Pb<sub>(i)</sub> (15.61–15.64), and <sup>208</sup> Pb/<sup>204</sup> Pb<sub>(i)</sub> (38.46–38.75). Zircon εHf<sub>(i)</sub> values are positive (2.32–6.20), plotting between the depleted mantle and chondritic evolution lines. Additionally, these rocks display low zircon δ<sup>18</sup> O values (+4.54 to + 6.53‰), comparable to mantle composition. The petrographic characteristics of the investigated plutons suggest that fractional crystallization with minimal assimilation and/or magma mixing played a dominant role during their solidification. The integration of geochemical and isotopic data, alongside regional geological constraints, advocates for enriched lithospheric mantle as the source for the parental magmas of the studied plutons. These magmas subsequently underwent differentiation within a deep-seated magma chamber, followed by emplacement into the crust.
DOI: 10.5281/zenodo.15353544
title: Supplementary information to "A Unique LHCE Light-Harvesting protein Family is involved in Photosystem I and II Far-Red Absorption in Euglena gracilis"

description: Supplementary information to 

 

A Unique LHCE Light-Harvesting protein Family is involved in Photosystem I and II Far-Red Absorption in Euglena gracilis

Héctor Miranda-Astudillo1,2, Rameez Arshad3, Félix Vega de Luna1, Zhaida Aguilar-Gonzalez2, Hadrien Forêt1, Tom Feller1, Alain Gervasi1, Wojciech Nawrocki1,4, Charles Counson1,5, Pierre Morsomme6, Hervé Degand6, Denis Baurain5, Roman Kouřil3, Pierre Cardol1

 

1 Genetics and Physiology of microalgae, InBioS/Phytosystems, University of Liège, Belgium.

2  Present Address: Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico.

3 Faculty of Science, Department of Biophysics, Palacký University Olomouc, Czech Republic.

4 Institute of Physical and Chemical Biology, French National Centre for Scientific Research, France.

5 Eukaryotic Phylogenomics, InBioS–PhytoSYSTEMS, University of Liège, Belgium.

6 Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
DOI: 10.5281/zenodo.15353545
title: Supplementary information to "A Unique LHCE Light-Harvesting protein Family is involved in Photosystem I and II Far-Red Absorption in Euglena gracilis"

description: Supplementary information to 

 

A Unique LHCE Light-Harvesting protein Family is involved in Photosystem I and II Far-Red Absorption in Euglena gracilis

Héctor Miranda-Astudillo1,2, Rameez Arshad3, Félix Vega de Luna1, Zhaida Aguilar-Gonzalez2, Hadrien Forêt1, Tom Feller1, Alain Gervasi1, Wojciech Nawrocki1,4, Charles Counson1,5, Pierre Morsomme6, Hervé Degand6, Denis Baurain5, Roman Kouřil3, Pierre Cardol1

 

1 Genetics and Physiology of microalgae, InBioS/Phytosystems, University of Liège, Belgium.

2  Present Address: Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico.

3 Faculty of Science, Department of Biophysics, Palacký University Olomouc, Czech Republic.

4 Institute of Physical and Chemical Biology, French National Centre for Scientific Research, France.

5 Eukaryotic Phylogenomics, InBioS–PhytoSYSTEMS, University of Liège, Belgium.

6 Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
DOI: 10.15468/dl.s5z24x
title: Occurrence Download

description: A dataset containing 35 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Hexanchus vitulus Springer & Waller, 1969"
 ]
}

 The dataset includes 35 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0019130-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15151/esrf-es-2040658855
title: The Iberian cryoEM community BAG (III)

description: The Iberian cryoEM BAG is a consortium of approximately 40 research groups from Portugal and Spain, focused on addressing critical biological questions. These include studies on membrane proteins, disease-related metabolic enzymes, antibiotic resistance, DNA replication and maintenance, protein synthesis, viral structure and replication mechanisms, and macromolecular complexes involved in key cellular processes such as protein folding and degradation. For these groups, electron cryo-microscopy is an indispensable tool, and access to ESRF resources is vital for advancing their research and achieving impactful results.
DOI: 10.15468/dl.ck5xtb
title: Occurrence Download

description: A dataset containing 328902 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is one of (Asia, Europe)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Sonchus oleraceus L.",
 "Year 1980-2025"
 ]
}

 The dataset includes 328902 records from 1805 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0019103-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.g5d7yv
title: Occurrence Download

description: A dataset containing 4244 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dictyosteliomycetes"
 ]
}

 The dataset includes 4244 records from 118 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0011815-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.j8nukt
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dothideales"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0011816-250426092105405/datasets/export for details.