cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.25957483.v1
title: Mesoarchaean mafic–ultramafic Ikauna layered intrusion, Bundelkhand craton, India: geology, U–Th–Pb age (SHRIMP) and correlation

description: Mafic–ultramafic rocks, occurring as intrusions in the Ikauna area, are a well-differentiated complex comprising dunite (serpentinite), pyroxenite, gabbro, and gabbro-pegmatite in the southern Bundelkhand craton. This complex intruded into Palaeo-Mesoarchaean TTG and was cut by Neoarchaean granites. The age of a late stage in the formation of the layered intrusion is estimated at 2798 ± 17 Ma, based on the U – Th – Pb dating (SHRIMP) of zircons from pegmatitic gabbro. The presence of grains with Palaeo-Mesoarchaean cores among the zircons indicates the contamination of the gabbro with crustal TTG granitoids. Furthermore, zircons, altered hydrothermally in the Palaeoproterozoic, were revealed. Thus, the age dates for the zircons are in good agreement with the relative geological age of the intrusion and the crustal evolution of the Bundelkhand craton. No mafic – ultramafic layered intrusions, similar to the Ikauna layered intrusion, have been reported from other cratons in the Indian Shield, but Keshargaria Swarm dykes of similar age (2800 ± 0.7 Ma) have been described from the Singhbhum craton.
DOI: 10.6084/m9.figshare.25976103
title: Diagenetic evolution of Upper Cretaceous carbonate sequences (Sarvak Formation) in the Abadan Plain, Iran: evidence from petrographic, elemental, stable, and strontium isotopic data

description: This study investigates the diagenetic evolution and geochemical variations within the Sarvak Formation by integrating the core, thin-section, scanning electron microscopy, X-ray diffraction, trace elements, carbon-oxygen, and strontium isotopic data from three wells in the Abadan Plain. The formation displays diverse diagenetic processes, influenced by multiple exposure surface condition including the Cenomanian-Turonian boundary (CT-ES) and middle Turonian (mT-ES). Meteoric diagenesis, shaped by tectonic activities and eustatic sea level changes, played a pivotal role, leading to dissolution (karstification), brecciation, cementation, and palaeosol formation. Geochemical analysis revealed significant elemental variations across the studied wells. Magnesium (Mg) exhibited peaks at sequence boundaries, responding to facies changes, while iron (Fe) and manganese (Mn) concentrations increased below disconformities, reflecting changes in redox conditions and karstification. Sodium (Na) concentrations varied with facies changes, showing peaks at sequence boundaries, indicative of palaeoexposure events. Strontium (Sr) isotopes aided in delineating stratigraphic positions of palaeoexposure surfaces and absolute dating of sequences. Increases in<sup>87</sup>Sr/<sup>86</sup>Sr ratios below disconformities suggested subaerial exposure events, with shorter durations at CT-ES and longer durations at mT-ES, contributing to dissolution features development. The δ<sup>13</sup>C<sub>carb</sub> and δ<sup>18</sup>O<sub>carb</sub> values indicated severe meteoric diagenesis below sequence boundaries, characterized by dissolution and reprecipitation of calcium carbonate as low-magnesium calcite (LMC) cements. Cross plots of δ<sup>13</sup>C<sub>carb</sub> vs. δ<sup>18</sup>O<sub>carb</sub> displayed inverted-J patterns, indicative of meteoric diagenesis effects. Comparison with previous studies highlighted similar trends in geochemical variations, with notable differences in element concentrations between wells. This study enhances our understanding of diagenetic history of the Sarvak Formation in the Abadan Plain and, in a larger scale, provides insights into diagenetic evolution of palaeoexposure-related carbonate sequences.
DOI: 10.6084/m9.figshare.25976103.v1
title: Diagenetic evolution of Upper Cretaceous carbonate sequences (Sarvak Formation) in the Abadan Plain, Iran: evidence from petrographic, elemental, stable, and strontium isotopic data

description: This study investigates the diagenetic evolution and geochemical variations within the Sarvak Formation by integrating the core, thin-section, scanning electron microscopy, X-ray diffraction, trace elements, carbon-oxygen, and strontium isotopic data from three wells in the Abadan Plain. The formation displays diverse diagenetic processes, influenced by multiple exposure surface condition including the Cenomanian-Turonian boundary (CT-ES) and middle Turonian (mT-ES). Meteoric diagenesis, shaped by tectonic activities and eustatic sea level changes, played a pivotal role, leading to dissolution (karstification), brecciation, cementation, and palaeosol formation. Geochemical analysis revealed significant elemental variations across the studied wells. Magnesium (Mg) exhibited peaks at sequence boundaries, responding to facies changes, while iron (Fe) and manganese (Mn) concentrations increased below disconformities, reflecting changes in redox conditions and karstification. Sodium (Na) concentrations varied with facies changes, showing peaks at sequence boundaries, indicative of palaeoexposure events. Strontium (Sr) isotopes aided in delineating stratigraphic positions of palaeoexposure surfaces and absolute dating of sequences. Increases in<sup>87</sup>Sr/<sup>86</sup>Sr ratios below disconformities suggested subaerial exposure events, with shorter durations at CT-ES and longer durations at mT-ES, contributing to dissolution features development. The δ<sup>13</sup>C<sub>carb</sub> and δ<sup>18</sup>O<sub>carb</sub> values indicated severe meteoric diagenesis below sequence boundaries, characterized by dissolution and reprecipitation of calcium carbonate as low-magnesium calcite (LMC) cements. Cross plots of δ<sup>13</sup>C<sub>carb</sub> vs. δ<sup>18</sup>O<sub>carb</sub> displayed inverted-J patterns, indicative of meteoric diagenesis effects. Comparison with previous studies highlighted similar trends in geochemical variations, with notable differences in element concentrations between wells. This study enhances our understanding of diagenetic history of the Sarvak Formation in the Abadan Plain and, in a larger scale, provides insights into diagenetic evolution of palaeoexposure-related carbonate sequences.
DOI: 10.6084/m9.figshare.26014280
title: Cretaceous evolution of the Lhasa-Qiangtang Orogen: insights from mafic igneous rocks

description: The compositional changes of successively emplaced mafic magmatites provide insights into the evolution of orogenic belts, particularly the transformation processes and properties of the orogenic lithospheric mantle. Herein, we present new zircon U‒Pb ages and Lu‒Hf isotopes, as well as whole-rock major, trace element, and Sr – Nd isotope compositions from three mafic intrusions in the Asuo area, central Tibet, to clarify the evolution of the Lhasa – Qiangtang Orogenic Belt (LQOB). These mafic intrusions can be classified into calc-alkaline basalts and are enriched in large ion lithophile elements and depleted in high-field strength elements. Significant differences in the whole-rock trace element compositions, Sr – Nd isotope values, and U – Pb ages stratify them into two groups, namely Groups I and II, of which Group I rocks (ca. 105 Ma) show lower<sup>87</sup>Sr/<sup>88</sup>Sr<sub>i</sub> = (0.70694–0.70701), [Sm/Yb]<sub>N</sub> = (1.51–1.54) and higher ε<sub>Nd</sub> (t) = (−0.74 to −0.61) than Group II (ca. 97–95 Ma) (<sup>87</sup>Sr/<sup>88</sup>Sr<sub>i</sub> = 0.70759–0.70870; ε<sub>Nd</sub> (t) = –4.58 to −3.75; [Sm/Yb]<sub>N</sub> = 2.43–2.94). These features indicate that the mantle source exhibits a progressive increase in the proportion of garnet, along with significant addition of subduction-related components into the primary melts. One scenario for producing such trace element patterns and gradually enriched radioactive isotope signatures involves the extensive heating of an oceanic slab beneath the LQOB by upwelling asthenosphere, which leads to the extensive melting of sediments within the slab. Identification of ca. 105–95 Ma Asuo mafic rocks suggests their formation in a post-collisional setting with additional heat input from the deep mantle. These results provide new evidence supporting the occurrence of the Lhasa – Qiangtang collision within the framework of north-south bidirectional subduction.
DOI: 10.6084/m9.figshare.26014280.v1
title: Cretaceous evolution of the Lhasa-Qiangtang Orogen: insights from mafic igneous rocks

description: The compositional changes of successively emplaced mafic magmatites provide insights into the evolution of orogenic belts, particularly the transformation processes and properties of the orogenic lithospheric mantle. Herein, we present new zircon U‒Pb ages and Lu‒Hf isotopes, as well as whole-rock major, trace element, and Sr – Nd isotope compositions from three mafic intrusions in the Asuo area, central Tibet, to clarify the evolution of the Lhasa – Qiangtang Orogenic Belt (LQOB). These mafic intrusions can be classified into calc-alkaline basalts and are enriched in large ion lithophile elements and depleted in high-field strength elements. Significant differences in the whole-rock trace element compositions, Sr – Nd isotope values, and U – Pb ages stratify them into two groups, namely Groups I and II, of which Group I rocks (ca. 105 Ma) show lower<sup>87</sup>Sr/<sup>88</sup>Sr<sub>i</sub> = (0.70694–0.70701), [Sm/Yb]<sub>N</sub> = (1.51–1.54) and higher ε<sub>Nd</sub> (t) = (−0.74 to −0.61) than Group II (ca. 97–95 Ma) (<sup>87</sup>Sr/<sup>88</sup>Sr<sub>i</sub> = 0.70759–0.70870; ε<sub>Nd</sub> (t) = –4.58 to −3.75; [Sm/Yb]<sub>N</sub> = 2.43–2.94). These features indicate that the mantle source exhibits a progressive increase in the proportion of garnet, along with significant addition of subduction-related components into the primary melts. One scenario for producing such trace element patterns and gradually enriched radioactive isotope signatures involves the extensive heating of an oceanic slab beneath the LQOB by upwelling asthenosphere, which leads to the extensive melting of sediments within the slab. Identification of ca. 105–95 Ma Asuo mafic rocks suggests their formation in a post-collisional setting with additional heat input from the deep mantle. These results provide new evidence supporting the occurrence of the Lhasa – Qiangtang collision within the framework of north-south bidirectional subduction.
DOI: 10.6084/m9.figshare.25957479
title: Defining the Cimmerian orogeny in the West Pontides: geochronological and geochemical data from Permo-Triassic dykes in the İstanbul-Zonguldak Tectonic Unit

description: Permo-Triassic intrusive rocks and back-arc basins are exposed in the İstanbul-Zonguldak Tectonic Unit in the West Pontides. Their tectono-magmatic history, thus to the evolution of the back-arc basins, is poorly understood. Here, I present on olivine-bearing basalt and andesite dykes and granite dykes and pyroxene-bearing andesite dykes of Permo-Triassic crystallization and their Pb-loss ages from the basement rocks and sedimentary rocks in the İstanbul-Zonguldak Tectonic Unit (NW Turkey). They have holocrystalline and porphyritic to vitrophyric textures. U-Pb dating of igneous zircon grains from olivine-bearing basalt and andesite dykes and granite dykes yielded Middle Permian ages of ca. 270.1 ± 1.1 to 261.4 ± 1.7 Ma (2σ), and pyroxene-bearing andesite dykes obtained Early Triassic ages of ca. 252.1 ± 2.4 to 250.1 ± 2.0 Ma (2σ). Their young ages of the dykes yielded Late Triassic ages of ca. 228 to 220 Ma (2σ). Geochemically, the Middle Permian dykes have a calc-alkaline affinity and are notable for subduction components, as indicated by the presence of distinct negative Nb anomalies. Early Triassic dykes show alkaline signatures and show within-plate character, corresponding to prominent positive Nb anomalies. Combined with data from the literature, the Middle Permian dykes are magmatic products associated with the Tethys Ocean subducting under the Pontides and the Early Triassic dykes are magmatic pulses related to the rifting of the Permo-Triassic back-arc basins. The Late Triassic young ages of the Permo-Triassic dykes in the İstanbul-Zonguldak Tectonic Unit represent a deformation event corresponding to the Cimmerian Orogeny, and this implies that the Permo-Triassic back-arc basins closed during the late Triassic.
DOI: 10.6084/m9.figshare.25957479.v1
title: Defining the Cimmerian orogeny in the West Pontides: geochronological and geochemical data from Permo-Triassic dykes in the İstanbul-Zonguldak Tectonic Unit

description: Permo-Triassic intrusive rocks and back-arc basins are exposed in the İstanbul-Zonguldak Tectonic Unit in the West Pontides. Their tectono-magmatic history, thus to the evolution of the back-arc basins, is poorly understood. Here, I present on olivine-bearing basalt and andesite dykes and granite dykes and pyroxene-bearing andesite dykes of Permo-Triassic crystallization and their Pb-loss ages from the basement rocks and sedimentary rocks in the İstanbul-Zonguldak Tectonic Unit (NW Turkey). They have holocrystalline and porphyritic to vitrophyric textures. U-Pb dating of igneous zircon grains from olivine-bearing basalt and andesite dykes and granite dykes yielded Middle Permian ages of ca. 270.1 ± 1.1 to 261.4 ± 1.7 Ma (2σ), and pyroxene-bearing andesite dykes obtained Early Triassic ages of ca. 252.1 ± 2.4 to 250.1 ± 2.0 Ma (2σ). Their young ages of the dykes yielded Late Triassic ages of ca. 228 to 220 Ma (2σ). Geochemically, the Middle Permian dykes have a calc-alkaline affinity and are notable for subduction components, as indicated by the presence of distinct negative Nb anomalies. Early Triassic dykes show alkaline signatures and show within-plate character, corresponding to prominent positive Nb anomalies. Combined with data from the literature, the Middle Permian dykes are magmatic products associated with the Tethys Ocean subducting under the Pontides and the Early Triassic dykes are magmatic pulses related to the rifting of the Permo-Triassic back-arc basins. The Late Triassic young ages of the Permo-Triassic dykes in the İstanbul-Zonguldak Tectonic Unit represent a deformation event corresponding to the Cimmerian Orogeny, and this implies that the Permo-Triassic back-arc basins closed during the late Triassic.
DOI: 10.6084/m9.figshare.26048026.v1
title: Prograde metamorphism in the ~1.9 Ga Jiao–Liao–Ji orogenic belt of NE China Craton: implications for orogenic crustal thickening

description: The complete evolutionary process of orogenesis can be deciphered by studying metamorphic rocks at middle and lower crustal depths of orogens. Recent studies have suggested that granulite-facies metamorphic rocks in the Paleoproterozoic Jiao–Liao–Ji orogenic belt experienced clockwise pressure–temperature (<i>p</i>–<i>T</i>) paths. However, due to the effects of high temperature, the prograde metamorphic processes are poorly constrained. The question could be solved by studying the Barrovian series rocks, because some garnet growth zoning has been preserved in the lower grade rocks. A Barrovian series from garnet to kyanite-sillimanite zones has been recognized in the Liaodong Peninsula. Based on petrology and mineral chemistry, each metamorphic rocks in metamorphic zone are divided into prograde, peak, and retrograde metamorphic stages. Pseudosection modelling constrains the peak metamorphic conditions at ~568°C and ~5.8 kbar for the garnet zone, ~585°C and ~6 kbar for the staurolite zone, and ~670°C and ~8.2 kbar for the kyanite-sillimanite zone. All Barrovian series rocks have clockwise <i>p</i>–<i>T</i> paths, implying crustal thickening during prograde metamorphism. LA-ICP-MS monazite and zircon U–Pb dating suggest that peak Barrovian metamorphism occurred at ca. 1.92–1.91 Ga. Combining our results of the Barrovian series with studies on granulite-facies metamorphic rocks, we suggest that the Jiao–Liao–Ji belt experienced crustal thickening from 1.95 to 1.90 Ga, inducing Barrovian metamorphism and granulite-facies metamorphism in the middle and lower crust, respectively. Subsequently, rocks located at the different crustal levels were exhumed during post-orogenic extension.
DOI: 10.6084/m9.figshare.27178219
title: The mid-Variscan suture in the Morais complex of Trás-os-Montes (Portugal): insights from geochemistry and geochronology of oceanic rocks

description: The Middle Allochthon of the Galicia-Trás-os-Montes Zone (GTMZ) in NW Iberia is an assemblage of oceanic units representing the Variscan suture of one or more peri-Gondwanan oceans. This contribution brings new geochronological and geochemical data from the Middle Allochthon of the Morais Complex, in northern Portugal. There, the oceanic ensemble consists of a stack of five tectonic units which from bottom to top are the Junqueira, Pombais and Izeda oceanic supracrustals and the Remondes and Morais-Talhinhas ophiolitic units. The Junqueira and Pombais units consist of greenschists and metapelites. No age data are available for these two units, but a correlation is established with a Cambro-Ordovician unit in the Órdenes Complex of Galicia (NW Spain) dated at 500 Ma. The Izeda Unit consists of fine-grained, low-grade amphibolites transitional to epidote-amphibolites and greenschists, for which an age of 484 ± 3 Ma has been obtained for a metabasic tuff. In the ophiolitic ensemble, the Remondes and Morais-Talhinhas units consist of fine-grained amphibolites associated with deformed metagabbros, mafic cumulates and serpentinized ultramafics. In this study, two plagiogranite samples from the Remondes Unit yielded a complex spread of age data with Silurian ages representing the dominant population. This suggests that the newly defined Remondes Unit is younger than the Izeda Unit but older than the previously published age for these rocks, which are considered part of the overlying Morais-Talhinhas Unit, dated as Devonian (406–395 Ma) in a previous study. The geochemistry of the basic rocks in the five units is that of NMORB with a subduction-derived component that varies from weak to null. The ages, together with new and previously published whole rock geochemical data obtained from basic igneous samples, are interpreted to date and reflect the formation of igneous protoliths in oceanic ridge settings associated with the Mid-Variscan Ocean, a part of the Rheic oceanic realm that registered magmatic activity between the late Cambrian and the Lower Devonian.
DOI: 10.6084/m9.figshare.26048026
title: Prograde metamorphism in the ~1.9 Ga Jiao–Liao–Ji orogenic belt of NE China Craton: implications for orogenic crustal thickening

description: The complete evolutionary process of orogenesis can be deciphered by studying metamorphic rocks at middle and lower crustal depths of orogens. Recent studies have suggested that granulite-facies metamorphic rocks in the Paleoproterozoic Jiao–Liao–Ji orogenic belt experienced clockwise pressure–temperature (<i>p</i>–<i>T</i>) paths. However, due to the effects of high temperature, the prograde metamorphic processes are poorly constrained. The question could be solved by studying the Barrovian series rocks, because some garnet growth zoning has been preserved in the lower grade rocks. A Barrovian series from garnet to kyanite-sillimanite zones has been recognized in the Liaodong Peninsula. Based on petrology and mineral chemistry, each metamorphic rocks in metamorphic zone are divided into prograde, peak, and retrograde metamorphic stages. Pseudosection modelling constrains the peak metamorphic conditions at ~568°C and ~5.8 kbar for the garnet zone, ~585°C and ~6 kbar for the staurolite zone, and ~670°C and ~8.2 kbar for the kyanite-sillimanite zone. All Barrovian series rocks have clockwise <i>p</i>–<i>T</i> paths, implying crustal thickening during prograde metamorphism. LA-ICP-MS monazite and zircon U–Pb dating suggest that peak Barrovian metamorphism occurred at ca. 1.92–1.91 Ga. Combining our results of the Barrovian series with studies on granulite-facies metamorphic rocks, we suggest that the Jiao–Liao–Ji belt experienced crustal thickening from 1.95 to 1.90 Ga, inducing Barrovian metamorphism and granulite-facies metamorphism in the middle and lower crust, respectively. Subsequently, rocks located at the different crustal levels were exhumed during post-orogenic extension.
DOI: 10.26179/mjnh-5y32
title: McDonald Island coastline features extracted from Worldview3 satellite image
DOI: 10.15468/dl.s6byzq
title: Occurrence Download

description: A dataset containing 38379 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Espeletia Mutis ex Humb. & Bonpl.",
 "HasCoordinate is true",
 "Country is Colombia"
 ]
}

 The dataset includes 38379 records from 151 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0018313-241126133413365/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.nygcf5
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Ommastrephes brevimanus (Gould, 1852)",
 "Geometry POLYGON((170 20, 170 50, 120 50, 120 20, 170 20))",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0018314-241126133413365/datasets/export for details.
DOI: 10.57715/unr/bl85z8/2hjbs5
title: EPH2022_T4.RData

description: Base EPH - Observatorio. 4to trimestre de 2022
DOI: 10.57715/unr/bl85z8/7r2bmd
title: EPH2018_T1.RData

description: Base EPH - Observatorio. 1er trimestre de 2018
DOI: 10.57715/unr/bl85z8/9asx3i
title: EPH2022_T3.RData

description: Base EPH - Observatorio. 3er trimestre de 2022
DOI: 10.57715/unr/bl85z8/9ikekc
title: EPH2021_T2.RData

description: Base EPH - Observatorio. 2do trimestre de 2021
DOI: 10.57715/unr/bl85z8/9qiole
title: EPH2020_T3.RData

description: Base EPH - Observatorio. 3er trimestre de 2020
DOI: 10.57715/unr/bl85z8/bkkwmd
title: Manual-EPH-Observatorio.pdf

description: Manual para las bases de EPH compiladas y ampliadas por el Observatorio Económico Social | UNR, que están disponibles para descargar y ser utilizadas mediante el programa estadístico R.
DOI: 10.57715/unr/bl85z8/hjkd0f
title: EPH2017_T1.RData

description: Base EPH - Observatorio. 1er trimestre de 2017
DOI: 10.57715/unr/bl85z8/itm0cs
title: EPH2018_T3.RData

description: Base EPH - Observatorio. 3er trimestre de 2018
DOI: 10.57715/unr/bl85z8/ki1wb4
title: EPH2021_T1.RData

description: Base EPH - Observatorio. 1er trimestre de 2021
DOI: 10.57715/unr/bl85z8/phmycc
title: EPH2017_T3.RData

description: Base EPH - Observatorio. 3er trimestre de 2017
DOI: 10.57715/unr/bl85z8/s9h9iy
title: EPH2019_T4.RData

description: Base EPH - Observatorio. 4to trimestre de 2019
DOI: 10.57715/unr/bl85z8/u2k22t
title: EPH2021_T4.RData

description: Base EPH - Observatorio. 4to trimestre de 2021
DOI: 10.57715/unr/bl85z8/45fmga
title: EPH2022_T2.RData

description: Base EPH - Observatorio. 2do trimestre de 2022
DOI: 10.57715/unr/bl85z8/4ray02
title: EPH2017_T4.RData

description: Base EPH - Observatorio. 4to trimestre de 2017
DOI: 10.57715/unr/bl85z8/awbl8i
title: EPH2017_T2.RData

description: Base EPH - Observatorio. 2do trimestre de 2017
DOI: 10.57715/unr/bl85z8/bmjf3m
title: EPH2019_T1.RData

description: Base EPH - Observatorio. 1er trimestre de 2019
DOI: 10.57715/unr/bl85z8/cqnjky
title: EPH2020_T1.RData

description: Base EPH - Observatorio. 1er trimestre de 2020
DOI: 10.57715/unr/bl85z8/duzyvo
title: EPH2018_T4.RData

description: Base EPH - Observatorio. 4to trimestre de 2018
DOI: 10.57715/unr/bl85z8/i05flm
title: EPH2019_T2.RData

description: Base EPH - Observatorio. 2do trimestre de 2019
DOI: 10.57715/unr/bl85z8/n2lt57
title: EPH2020_T4.RData

description: Base EPH - Observatorio. 4to trimestre de 2020
DOI: 10.57715/unr/bl85z8/o7m25j
title: EPH2021_T3.RData

description: Base EPH - Observatorio. 3er trimestre de 2021
DOI: 10.57715/unr/bl85z8/pszlb3
title: EPH2022_T1.RData

description: Base EPH - Observatorio. 1er trimestre de 2022
DOI: 10.57715/unr/bl85z8/sfepbf
title: EPH2018_T2.RData

description: Base EPH - Observatorio. 2do trimestre de 2018