cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.16699519.v1
title: Improving geological logging of drill holes using geochemical data and data analytics for mineral exploration in the Gawler Ranges, South Australia

description: Geochemical data are frequently collected from mineral exploration drill-hole samples to more accurately define and characterise the geological units intersected by the drill hole. However, large multi-element data sets are slow and challenging to interpret without using some form of automated analysis, such as mathematical, statistical or machine learning techniques. Automated analysis techniques also have the advantage in that they are repeatable and can provide consistent results, even for very large data sets. In this paper, an automated litho-geochemical interpretation workflow is demonstrated, which includes data exploration and data preparation using appropriate compositional data-analysis techniques. Multiscale analysis using a modified wavelet tessellation has been applied to the data to provide coherent geological domains. Unsupervised machine learning (clustering) has been used to provide a first-pass classification. The results are compared with the detailed geologist’s logs. The comparison shows how the integration of automated analysis of geochemical data can be used to enhance traditional geological logging and demonstrates the identification of new geological units from the automated litho-geochemical logging that were not apparent from visual logging but are geochemically distinct. To reduce computational complexity and facilitate interpretation, a subset of geochemical elements is selected, and then a centred log-ratio transform is applied. The wavelet tessellation method is used to domain the drill holes into rock units at a range of scales. Several clustering methods were tested to identify distinct rock units in the samples and multiscale domains for classification. Results are compared with geologist’s logs to assess how geochemical data analysis can inform and improve traditional geology logs.
DOI: 10.6084/m9.figshare.23917047
title: Petrogenesis of the Hoy lava field, a long-lived continental mafic volcanic province in eastern Australia

description: Small-scale continental basaltic fields can erupt with little warning and bring deep undegassed magmas to the surface rapidly. To explore the lifetime, petrogenesis and plumbing system architecture feeding such basaltic lava fields and compare them with large-scale shield volcanoes, we have focused on the Hoy lava field, central Queensland, Australia. <sup>40</sup>Ar/<sup>39</sup>Ar geochronology, elemental and isotopic whole-rock geochemistry and mineral chemistry on selected Hoy samples reveal long-lived volcanism of <i>ca</i> 50 Ma and magma storage at mantle depths, notably different from the comparatively short duration (3–5 Myr) and crustal magma storage depths of shield volcanoes. In this study, four Hoy lava-field eruptive intervals spanning <i>ca</i> 50 Ma were investigated: 67.5 ± 0.3 Ma, 32.3 ± 0.6–31.6 ± 0.7 Ma, 21.9 ± 0.5 Ma and 18.1 ± 0.3 Ma. In all four eruptive events, samples are porphyritic alkali basalts and trachybasalts (11.41–6.45 wt% MgO) with incompatible element concentrations and Sr–Nd–Pb isotope ratios dominantly derived from a metasomatised sub-continental lithospheric mantle (SCLM) source with an enriched mantle I (EMI) signature. Complex crystal populations show major- and trace-element variations reflecting fractional crystallisation, magma recharge, magma mixing and mantle xenocryst entrainment. Clinopyroxene–melt thermobarometry indicates magma storage in SCLM reservoirs at ∼30–47 km depths. The nearby larger but shorter-lived (3–5 Myr) Buckland central volcano has similar source compositions; however, magma storage is limited and concentrated in the crust, resulting in increased crustal contamination. The results suggest that basaltic centres of contrasting scale and longevity are linked to distinct magma production mechanisms, fluxes, ascent and differentiation. The Hoy lava field erupted for over 50 Ma, with at least four eruptive periods. The Hoy magmas are all derived from the same source: SCLM with an EMI signature. Hoy lavas have a complex history of magma recharge, magma mixing, fractionation and xenocryst entrainment at mantle depths (30–47 km). Hoy lavas experienced deeper storage, limited contamination and faster ascent than the nearby Buckland central volcano.
DOI: 10.6084/m9.figshare.23917047.v1
title: Petrogenesis of the Hoy lava field, a long-lived continental mafic volcanic province in eastern Australia

description: Small-scale continental basaltic fields can erupt with little warning and bring deep undegassed magmas to the surface rapidly. To explore the lifetime, petrogenesis and plumbing system architecture feeding such basaltic lava fields and compare them with large-scale shield volcanoes, we have focused on the Hoy lava field, central Queensland, Australia. <sup>40</sup>Ar/<sup>39</sup>Ar geochronology, elemental and isotopic whole-rock geochemistry and mineral chemistry on selected Hoy samples reveal long-lived volcanism of <i>ca</i> 50 Ma and magma storage at mantle depths, notably different from the comparatively short duration (3–5 Myr) and crustal magma storage depths of shield volcanoes. In this study, four Hoy lava-field eruptive intervals spanning <i>ca</i> 50 Ma were investigated: 67.5 ± 0.3 Ma, 32.3 ± 0.6–31.6 ± 0.7 Ma, 21.9 ± 0.5 Ma and 18.1 ± 0.3 Ma. In all four eruptive events, samples are porphyritic alkali basalts and trachybasalts (11.41–6.45 wt% MgO) with incompatible element concentrations and Sr–Nd–Pb isotope ratios dominantly derived from a metasomatised sub-continental lithospheric mantle (SCLM) source with an enriched mantle I (EMI) signature. Complex crystal populations show major- and trace-element variations reflecting fractional crystallisation, magma recharge, magma mixing and mantle xenocryst entrainment. Clinopyroxene–melt thermobarometry indicates magma storage in SCLM reservoirs at ∼30–47 km depths. The nearby larger but shorter-lived (3–5 Myr) Buckland central volcano has similar source compositions; however, magma storage is limited and concentrated in the crust, resulting in increased crustal contamination. The results suggest that basaltic centres of contrasting scale and longevity are linked to distinct magma production mechanisms, fluxes, ascent and differentiation. The Hoy lava field erupted for over 50 Ma, with at least four eruptive periods. The Hoy magmas are all derived from the same source: SCLM with an EMI signature. Hoy lavas have a complex history of magma recharge, magma mixing, fractionation and xenocryst entrainment at mantle depths (30–47 km). Hoy lavas experienced deeper storage, limited contamination and faster ascent than the nearby Buckland central volcano.
DOI: 10.6084/m9.figshare.25264508
title: Mesoproterozoic age for andalusite in the lower Rocky Cape Group, northwest Tasmania

description: New U–Th–Pb chemical data from both electron probe microanalysis and U–Pb laser ablation-inductively coupled plasma mass spectrometry on monazite inclusions in giant andalusite porphyroblasts indicate that the lowermost subdivision of the Rocky Cape Group in northwest Tasmania underwent metamorphism at <i>ca</i> 1100 Ma. The Proterozoic Rocky Cape Group is a ∼10 km-thick succession of quartz arenite, siltstone and pelite. These sediments were deposited between <i>ca</i> 1450 and <i>ca</i> 1010 Ma. Metamorphism within the Rocky Cape Group ranges from the prehnite–pumpellyite to upper greenschist facies, locally reaching garnet grade. In the lowermost formation of the Rocky Cape Group, andalusite-bearing mineral assemblages in the Pedder River Siltstone formed prior to or synchronously with monazite development. The andalusite-bearing mineral assemblage indicates relatively low-pressure conditions of &lt;200 MPa, consistent with the stratigraphic thickness of the Rocky Cape Group (∼10 km). However, the presence of the intermediate-temperature biotite–andalusite mineral assemblages (500 °C) in the study area suggests the contribution of additional heat sources. Garnet porphyroblasts were observed ∼2 km away. Similar-age medium-grade metamorphism and magmatism at about 1100 Ma have been observed regionally in the South Tasman Rise and East Tasman Plateau, and in areas that are thought to have been contiguous with northwestern Tasmania such as Dronning Maud Land, central Arizona (Yavapai–Mazatzal) and Belt–Purcell Basin in the southwestern and northwestern Laurentian crustal sequences. The pressure and temperature relationships, mineral associations and regional data suggest additional heat flow was present through the lower part of the Rocky Cape Group. The higher geothermal gradient could be attributed to burial during basin development and deposition of the upper Rocky Cape Group or associated magmatism on the margin of Laurentia during assembly of Rodinia. Low-pressure, intermediate-temperature mineral associations occur in the Rocky Cape Group. Heat sources are unrelated to nearby Devonian granite. Robust ages reveal the first discovery of 1100 Ma metamorphism in Tasmania. These provide data for a missing link in Rodinian paleogeographic reconstructions.
DOI: 10.6084/m9.figshare.25264508.v1
title: Mesoproterozoic age for andalusite in the lower Rocky Cape Group, northwest Tasmania

description: New U–Th–Pb chemical data from both electron probe microanalysis and U–Pb laser ablation-inductively coupled plasma mass spectrometry on monazite inclusions in giant andalusite porphyroblasts indicate that the lowermost subdivision of the Rocky Cape Group in northwest Tasmania underwent metamorphism at <i>ca</i> 1100 Ma. The Proterozoic Rocky Cape Group is a ∼10 km-thick succession of quartz arenite, siltstone and pelite. These sediments were deposited between <i>ca</i> 1450 and <i>ca</i> 1010 Ma. Metamorphism within the Rocky Cape Group ranges from the prehnite–pumpellyite to upper greenschist facies, locally reaching garnet grade. In the lowermost formation of the Rocky Cape Group, andalusite-bearing mineral assemblages in the Pedder River Siltstone formed prior to or synchronously with monazite development. The andalusite-bearing mineral assemblage indicates relatively low-pressure conditions of &lt;200 MPa, consistent with the stratigraphic thickness of the Rocky Cape Group (∼10 km). However, the presence of the intermediate-temperature biotite–andalusite mineral assemblages (500 °C) in the study area suggests the contribution of additional heat sources. Garnet porphyroblasts were observed ∼2 km away. Similar-age medium-grade metamorphism and magmatism at about 1100 Ma have been observed regionally in the South Tasman Rise and East Tasman Plateau, and in areas that are thought to have been contiguous with northwestern Tasmania such as Dronning Maud Land, central Arizona (Yavapai–Mazatzal) and Belt–Purcell Basin in the southwestern and northwestern Laurentian crustal sequences. The pressure and temperature relationships, mineral associations and regional data suggest additional heat flow was present through the lower part of the Rocky Cape Group. The higher geothermal gradient could be attributed to burial during basin development and deposition of the upper Rocky Cape Group or associated magmatism on the margin of Laurentia during assembly of Rodinia. Low-pressure, intermediate-temperature mineral associations occur in the Rocky Cape Group. Heat sources are unrelated to nearby Devonian granite. Robust ages reveal the first discovery of 1100 Ma metamorphism in Tasmania. These provide data for a missing link in Rodinian paleogeographic reconstructions.
DOI: 10.6084/m9.figshare.25448020
title: Socioeconomic differences in optimism and pessimism among children and adolescents

description: It provides information about family socioeconomic status, optimism and pessimism of children and adolescents (n=4730) aged from 9-19.
DOI: 10.6084/m9.figshare.25448020.v1
title: Socioeconomic differences in optimism and pessimism among children and adolescents

description: It provides information about family socioeconomic status, optimism and pessimism of children and adolescents (n=4730) aged from 9-19.
DOI: 10.15468/pmg55h
title: The Yasunobu Naritomi Butterffly Collection, The University Museum, The University of Tokyo.

description: Butterfly specimens collected by Mr. Yasunobu Naritomi and deposited at The University Museum, The University of Tokyo
DOI: 10.5281/zenodo.6395132
title: Earthquake catalogue for the Taupō Fault Belt, New Zealand, 2001

description: This dataset contains the earthquake catalogue and focal mechanism data associated with the manuscript "The 2001 Taupō Fault Belt sequence as evidence for magma-tectonic interaction at Taupō Volcano" by McGregor et al.

If you use this date please appropriately cite the associated manuscript:

McGregor, R.F.D., Illsley‐Kemp, F. and Townend, J., 2022. The 2001 Taupō Fault Belt Seismicity as Evidence of Magma‐Tectonic Interaction at Taupō Volcano. Geochemistry, Geophysics, Geosystems, 23(11), p.e2022GC010625.

 

The files are as follows:



TaupoFaultBelt2001.xml - The earthquake catalogue in QuakeML format.

TaupoFaultBelt2001.dat - The earthquake catalogue in text file format. Note that if an earthquake was not relocated the growclust (GC) parameters are equal to zero.

TaupoFaultBelt2001_FocalMechanisms.dat - The best solution focal mechanism parameters in text file format.
description: This research was funded by the Frank Evison Research Scholarship and the scholarship awarded under the auspices of the EQC Programme in Earthquake Seismology and Tectonic Geodesy.
DOI: 10.5281/zenodo.6395133
title: Earthquake catalogue for the Taupō Fault Belt, New Zealand, 2001

description: This dataset contains the earthquake catalogue and focal mechanism data associated with the manuscript "The 2001 Taupō Fault Belt sequence as evidence for magma-tectonic interaction at Taupō Volcano" by McGregor et al.

If you use this date please appropriately cite the associated manuscript:

McGregor, R.F.D., Illsley‐Kemp, F. and Townend, J., 2022. The 2001 Taupō Fault Belt Seismicity as Evidence of Magma‐Tectonic Interaction at Taupō Volcano. Geochemistry, Geophysics, Geosystems, 23(11), p.e2022GC010625.

 

The files are as follows:



TaupoFaultBelt2001.xml - The earthquake catalogue in QuakeML format.

TaupoFaultBelt2001.dat - The earthquake catalogue in text file format. Note that if an earthquake was not relocated the growclust (GC) parameters are equal to zero.

TaupoFaultBelt2001_FocalMechanisms.dat - The best solution focal mechanism parameters in text file format.
description: This research was funded by the Frank Evison Research Scholarship and the scholarship awarded under the auspices of the EQC Programme in Earthquake Seismology and Tectonic Geodesy.
DOI: 10.5281/zenodo.4595830
title: Data associated with "Volcanic unrest at Taupō volcano in 2019: Causes, mechanisms and implications" by Illsley-Kemp et al.

description: This dataset accompanies the manuscript "Volcanic unrest at Taupō volcano in 2019: Causes, mechanisms and implications" by Illsley-Kemp et al. If you use this data please cite the paper as appropriate:

Illsley‐Kemp, F., Barker, S.J., Wilson, C.J., Chamberlain, C.J., Hreinsdóttir, S., Ellis, S., Hamling, I.J., Savage, M.K., Mestel, E.R. and Wadsworth, F.B., 2021. Volcanic unrest at Taupō volcano in 2019: Causes, mechanisms and implications. Geochemistry, Geophysics, Geosystems, 22(6), p.e2021GC009803.

The dataset contains:



The earthquake catalogue, in QuakeML format

GNSS data, in text file format

Moment tensor solution figures

Supplementary File S1, a spreadsheet for calculating rheological response
DOI: 10.5281/zenodo.4595831
title: Data associated with "Volcanic unrest at Taupō volcano in 2019: Causes, mechanisms and implications" by Illsley-Kemp et al.

description: This dataset accompanies the manuscript "Volcanic unrest at Taupō volcano in 2019: Causes, mechanisms and implications" by Illsley-Kemp et al. If you use this data please cite the paper as appropriate:

Illsley‐Kemp, F., Barker, S.J., Wilson, C.J., Chamberlain, C.J., Hreinsdóttir, S., Ellis, S., Hamling, I.J., Savage, M.K., Mestel, E.R. and Wadsworth, F.B., 2021. Volcanic unrest at Taupō volcano in 2019: Causes, mechanisms and implications. Geochemistry, Geophysics, Geosystems, 22(6), p.e2021GC009803.

The dataset contains:



The earthquake catalogue, in QuakeML format

GNSS data, in text file format

Moment tensor solution figures

Supplementary File S1, a spreadsheet for calculating rheological response
DOI: 10.6084/m9.figshare.25448086
title: Large-scale phylogenetic relationships link to the chemical niches of epiphytic macrolichens

description: This study aims to elucidate the connection between the phylogeny of epiphytic macrolichens and their chemical niches.We assessed published floristic and environmental data from ninety canopies of<i>Picea</i>x<i>darwyniana</i>across a range of forest settings in British Columbia. Procrustean randomization tests were employed to investigate the concordance between a principal coordinates analysis of the cladistic distance matrix and a global non-metric multidimensional scaling of the ecological distance matrix.The research uncovers a robust association between large-scale macrolichen phylogeny and canopy throughfall chemistry. The calcium-scores of the species examined separated members of the orders Peltigerales and Lecanorales. However, the chemical factors associated with Ca, such as Mn, Mg, K, bark-, and soil-pH, cannot be excluded as contributing factors for the niche partitioning. Finally, the study also identifies minor species-specific variations in Ca-scores within orders and families.While substantial large-scale phylogenetic variation in the macrolichens’ Ca-scores is consistent with ancient adaptation to specialized chemical environments, minor variation within genera suggests some additional recent adaptation. The study highlights the value of lichens as transferable bioindicators for the chemical environment and underlines the importance of understanding the intricate interplay between chemical factors and lichen evolution.
DOI: 10.6084/m9.figshare.25448086.v1
title: Large-scale phylogenetic relationships link to the chemical niches of epiphytic macrolichens

description: This study aims to elucidate the connection between the phylogeny of epiphytic macrolichens and their chemical niches.We assessed published floristic and environmental data from ninety canopies of<i>Picea</i>x<i>darwyniana</i>across a range of forest settings in British Columbia. Procrustean randomization tests were employed to investigate the concordance between a principal coordinates analysis of the cladistic distance matrix and a global non-metric multidimensional scaling of the ecological distance matrix.The research uncovers a robust association between large-scale macrolichen phylogeny and canopy throughfall chemistry. The calcium-scores of the species examined separated members of the orders Peltigerales and Lecanorales. However, the chemical factors associated with Ca, such as Mn, Mg, K, bark-, and soil-pH, cannot be excluded as contributing factors for the niche partitioning. Finally, the study also identifies minor species-specific variations in Ca-scores within orders and families.While substantial large-scale phylogenetic variation in the macrolichens’ Ca-scores is consistent with ancient adaptation to specialized chemical environments, minor variation within genera suggests some additional recent adaptation. The study highlights the value of lichens as transferable bioindicators for the chemical environment and underlines the importance of understanding the intricate interplay between chemical factors and lichen evolution.
DOI: 10.5281/zenodo.10844049
title: MetaFlux: Meta-learning global carbon fluxes from sparse spatiotemporal observations

description: MetaFlux is a global, long-term carbon flux dataset of gross primary production and ecosystem respiration that is generated using meta-learning. The principle of meta-learning stems from the need to solve the problem of learning in the face of sparse data availability. Data sparsity is a prevalent challenge in climate and ecology science. For instance, in-situ observations tend to be spatially and temporally sparse. This issue can arise from sensor malfunctions, limited sensor locations, or non-ideal climate conditions such as persistent cloud cover. The lack of high-quality continuous data can make it difficult to understand many climate processes that are otherwise critical. The machine-learning community has attempted to tackle this problem by developing several learning approaches, including meta-learning that learns how to learn broad features across tasks to better infer other poorly sampled ones. In this work, we applied meta-learning to solve the problem of upscaling continuous carbon fluxes from sparse observations. Data scarcity in carbon flux applications is particularly problematic in the tropics and semi-arid regions, where only around 8–11% of long-term eddy covariance stations are currently operational. Unfortunately, these regions are important in modulating the global carbon cycle and its interannual variability. In general, we find that meta-trained machine models, including multi-layer perceptrons (MLP), long-short-term memory (LSTM), and bi-directional LSTM (BiLSTM), have lower validation errors on flux estimates by 9–16% when compared to their non-meta-trained counterparts. In addition, meta-trained models are more robust to extreme conditions, with 4–24% lower overall errors. Finally, we use an ensemble of meta-trained deep networks to generate a global product of ecosystem-scale photosynthesis and respiration fluxes from in-situ observations to daily and monthly global products at a 0.25-degree spatial resolution from 2001 to 2023, called "MetaFlux". We also checked for the seasonality, interannual variability, and correlation to solar-induced fluorescence of the upscaled product and found that MetaFlux outperformed state-of-the-art machine learning upscaling models, especially in critical semi-arid and tropical regions.