cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/ieda/100705
title: Clumped isotope composition of travertine from hyperalkaline springs in Oman

description: Carbonate formation at hyperalkaline springs is typical of serpentinization in peridotite massifs worldwide. These travertines have long been known to exhibit large variations in their carbon and oxygen isotope compositions, extending from apparent equilibrium values to highly depleted values. However, the exact causes of these variations are not well constrained. We analyzed a suite of well-characterized fresh carbonate precipitates and travertines associated with hyperalkaline springs in the peridotite section of the Samail ophiolite, Sultanate of Oman, and found their clumped isotope compositions vary systematically with formation environments. Based on these findings, we identified four main processes controlling the stable isotope compositions of these carbonates. These include hydroxylation of CO2, partial isotope equilibration of dissolved inorganic carbon, mixing between isotopically distinct carbonate end-members, and post-depositional recrystallization. Most notably, in fresh crystalline films on the surface of hyperalkaline springs and in some fresh carbonate precipitates from the bottom of hyperalkaline pools, we observed large enrichments in Δ47 (up to ~0.2‰ above expected equilibrium values) which accompany depletions in δ18O and δ13C, yielding about 0.01‰ increase in Δ47 and 1.1‰ decrease in δ13C for every 1‰ decrease in δ18O, relative to expected equilibrium values. This disequilibrium trend, also reflected in preserved travertines ranging in age from modern to ~40,000 years old, is interpreted to arise mainly from the isotope effects associated with the hydrox- ylation of CO2 in high-pH fluids and agrees with our first-order theoretical estimation. In addition, in some fresh carbonate precipitates from the bottom of hyperalkaline pools and in subsamples of one preserved travertine terrace, we observed additional enrichments in D47 at intermediate δ13C and d18O, consistent with mixing between isotopically distinct carbonate end- members. Our results suggest that carbonate clumped isotope analysis can be a valuable tool for identifying and distinguishing processes not readily apparent from the carbonate bulk stable isotope compositions alone, e.g., kinetic effects or mixing of different carbonate end-members, which can significantly alter both the apparent formation temperatures and apparent radiocarbon ages. The isotope trends observed in these travertine samples could be applied more broadly to identify extinct hyperalkaline springs in terrestrial and extraterrestrial environments, to better constrain the formation conditions and post-depositional alteration of hyperalkaline spring carbonates, and to extract potential paleoclimate information.
description: Falk, Elisabeth S., Guo, Weifu, Paukert, Amelia N., Matter, Juerg M., Mervine, Evelyn M., Kelemen, Peter B. (2016) "Controls on the stable isotope compositions of travertine from hyperalkaline springs in Oman: Insights from clumped isotope measurements", Geochimica et Cosmochimica Acta, 192, 1-28
DOI: 10.1594/ieda/100704
title: Clumped isotope composition of modern cold-water corals

description: The carbonate clumped isotope thermometer is a promising tool for determining past ocean temperatures. It is based on the temperature dependence of rare isotopes ‘clumping’ into the same carbonate ion group in the carbonate mineral lattice. The extent of this clumping effect is independent of the isotope composition of the water from which carbonate precipitates, providing unique advantages over many other paleotemperature proxies. Existing calibrations of this thermometer in cold- water and warm-water corals suggest clumped isotope ‘vital effects’ are negligible in cold-water corals but may be significant in warm-water corals. Here, we test the calibration of the carbonate clumped isotope thermometer in cold-water corals with a recently collected and well characterised sample set spanning a range of coral genera (Balanophyllia, Caryophyllia, Dasmosmilia, Desmophyllum, Enallopsammia and Javania). The clumped isotope compositions (D47) of these corals exhibit systematic dependences on their growth temperatures, confirming the basis of the carbonate clumped isotope thermometer. However, some cold-water coral genera show D47 values that are higher than the expected equilibrium values by up to 0.05‰ (equivalent to underestimating temperature by 9°C) similar to previous findings for some warm-water corals. This finding suggests that the vital effects affecting corals Δ47 are common to both warm- and cold-water corals. By comparison with models of the coral calcification process we suggest that the clumped isotope offsets in these genera are related to the kinetic isotope effects associated with CO2 hydration/hydroxylation reactions in the corals’ calcifying fluid. Our findings complicate the use of the car- bonate clumped isotope thermometer in corals, but suggest that species- or genus-specific calibrations could be useful for the future application of this paleotemperature proxy.
description: Spooner, Peter T.; Guo, Weifu; Robinson, Laura F.; Thiagarajan, Nivedita; Hendry, Katherine R.; Rosenheim, Brad E.; Leng, Melanie J. (2016) "Clumped isotope composition of cold-water corals: A role for vital effects?", Geochimica et Cosmochimica Acta, 79, 123-141. doi:10.1016/j.gca.2016.01.023
DOI: 10.1594/ieda/100703
title: Isotope data for abyssal peridotites from the Southwest Indian Ridge along the Marion Rise

description: Hf-Nd isotopic compositions and trace elements on abyssal peridotites and basalts.  Hf and Nd isotope  are done on hand-picked clinopyroxene separates.
DOI: 10.1594/ieda/100702
title: Abyssal peridotite data from the Gakkel Ridge

description: Hf-Nd-Os isotopic compositions and trace elements on abyssal peridotite samples.  Hf and Nd isotope and trace element are done on hand-picked clinopyroxene separates.  Os isotope compositions are determined on bulk samples that are strongly leached.
DOI: 10.1594/ieda/100701
title: Minnesota Pollution Control Agency Wild Rice Sulfate Study Mesocosm Synoptic Data

description: Experimental wetland mesocosms were loaded with dissolved sulfate at various concentrations to study the effects on the growth of wild rice (Zizania sp.). The surface water, sediment porewater, and sediment of 30 mesocosms representing four treatment levels were analyzed over the course of two days in August 2013 to investigate the effects of adding a terminal electron acceptor to an organic rich, anoxic system.
description: A. Myrbo, E.B. Swain, N.W. Johnson, D.R. Engstrom, J. Pastor, B. Dewey, P. Monson, J. Brenner, M. Dykhuizen Shore, and E.B. Peters
 (accepted with revisions, JGR-Biogeosciences) Increase in nutrients, mercury, and methylmercury as a consequence of elevated sulfate reduction to sulfide in experimental wetland mesocosms
DOI: 10.1594/ieda/100699
title: Carbon dioxide (CO2) densimeter calibration data

description: Splitting of the carbon dioxide Raman Fermi diad was measured using three different Raman instruments and various lasers and dispersion gratings. Data were collected at Virginia Tech and at the U.S. Geological Survey in Reston, VA. The purpose of the study was to compare densimeters determined using different analytical methods. The results show that calibrations are instrument and analytical condition dependent, and one should develop a densimeter that is specific to the users instrument and analytical protocols to obtain carbon dioxide pressures based on Raman analysis of bubbles in fluid and melt inclusions.
description: Lamadrid HM, Moore L, Moncada D, Rimstidt JD, Burruss RC & Bodnar RJ (2017) Reassessment of the Raman CO2 densimeter. Chemical Geology, 450, 210-222.
DOI: 10.1594/ieda/100700
title: S, Se and Te contents of basalts from the Reykjanes Ridge and SW Iceland Rift Zone

description: This data set reports S, Se, and Te concentrations in basaltic whole-rocks and glasses from the SW Iceland rift zone, including sub-glacial glasses, and submarine lavas from the Reykjanes Ridge, Gibbs Fracture Zone, and Mid-Atlantic Ridge. We thank R. Kingsley, J.M. Rhodes, and C. Mandeville for assistance with analyses. This work was supported by NSF award OCE# 0326658 to JGS. NSF award OCE# 1555523 provides curatorial support for marine geological samples at the Graduate School of Oceanography, University of Rhode Island.
description: Forrest, A. (2005), Sulfur, Selenium and Tellurium in Reykjanes Ridge and Iceland Basalts, 175 pp, University of Rhode Island, Kingston, RI.
Forrest, A., R. Kingsley, and J.-G. Schilling (2009), Determination of Selenium and Tellurium in Basalt Rock Reference Materials by Isotope Dilution Hydride Generation-Inductively Coupled Plasma-Mass Spectrometry (ID-HG-ICP-MS), Geostandards and Geoanalytical Research, 33(2), 261-269, doi:10.1111/j.1751-908X.2009.00841.x.
DOI: 10.1594/ieda/100698
title: Experimental results for rates of serpentinization of olivine determined using the synthetic fluid inclusion technique

description: The tables included in the dataset include (1) composition of the olivine host phase determined by electron microprobe analysis. (2) Time of flight Secondary Ion Mass Spectrometric (TOF-SIMS) data and compositions of reaction products of synthetic fluid inclusions after formation of serpentine phases, (3) Reaction rates, H2O fluxes and activities, and error analysis for individual synthetic fluid inclusions with compositions in the H2O-NaCl-MgCl2 system and various starting salinities; (4) Synthetic fluid inclusion microthermometric data, including the ice-melting temperature TM in degrees Celsius, salinity in weight percent calculated from the ice-melting temperature, and amount of water transferred from the solution to hydrous phases calculated based on the change in salinity; (5) Equations and data used to estimate the extent of reaction of each synthetic fluid inclusion analyzed.
description: Lamadrid HM, Schwartzenbach E, Dolocan A, Rimstidt JD & Bodnar RJ (2017) Effect of water activity on rates of serpentinization of olivine. Nature Communications, 8, 16107 (in press)
DOI: 10.1594/ieda/100693
title: Major and trace element analyses of volcanic rocks from Sumaco Volcano, Ecuador

description: Samples from the summit and flanks of Sumaco Volcano, collected in December 2010 during a National Science Foundation funded expedition to the rear-arc of Ecuador. Samples are phonolitic lavas that range from basanite to tephri-phonolite. Data include major and trace elements.
description: Escobar RD, Garrison JM, Sims KWW, Matthews TP, Yogodzinski GM (2012) Geochemistry and petrogenetic history of lavas from Sumaco Volcano, Northern Volcanic Zone, Ecuador. AGU Fall meeting
DOI: 10.1594/ieda/100697
title: Microprobe analyses of minerals and glass in volcanic rocks from Sumaco Volcano, Ecuador

description: Microprobe data from minerals and glass in lavas from Sumaco Volcano, Ecuador. Minerals include titanaugite, plagioclase, apatite, hauyne, hercynite
description: Escobar RD, Garrison JM, Sims KWW, Matthews TP, Yogodzinski GM (2012) Geochemistry and petrogenetic history of lavas from Sumaco Volcano, Northern Volcanic Zone, Ecuador. AGU Fall meeting
DOI: 10.1594/ieda/100694
title: Isotope analyses of volcanic rocks from Sumaco Volcano, Ecuador

description: 87Sr/86Sr and 143Nd/144Nd isotope data from alkaline lavas and basement samples from Sumaco Volcano, Ecuador. Collected during a 2010 field season, analyzed at the University of Wyoming HR-ICP-MS lab.
description: Escobar RD, Garrison JM, Sims KWW, Matthews TP, Yogodzinski GM (2012) Geochemistry and petrogenetic history of lavas from Sumaco Volcano, Northern Volcanic Zone, Ecuador. AGU Fall meeting
DOI: 10.1594/ieda/100695
title: Major and Trace Element Analyses of Boomerang 06 Basalt Glasses (Southeast Indian Ridge)

description: Major and Trace Elements in Basalt Glasses from the Boomerang 06 Expedition to the Southeast Indian Ridge (BMRG06MV). Major elements by electron microprobe analysis and trace elements by laser ablation ICP-MS.
description: Graham, D. W., K. T. M Johnson, L. M. Douglas Priebe and J. E. Lupton (1999) Hotspot-ridge interaction along the Southeast Indian Ridge near Amsterdam and St. Paul islands: helium isotope evidence. Earth Planet. Sci. Lett. 167, 297-310.

Scheirer, D. S., D. W. Forsyth, J. A. Conder, M. A. Eberle, S.-H. Hung, K. T. M. Johnson and D. W. Graham (2000) Anomalous seafloor spreading of the Southeast Indian Ridge near the Amsterdam-St. Paul Plateau. J. Geophys. Res. 105, 8243-8262.

Johnson, K. T. M., D. W. Graham, K. H. Rubin, K. Nicolaysen, D. S. Scheirer, D. W. Forsyth, E. T. Baker and L. M. Douglas Priebe (2000) Boomerang Seamount: the active expression of the Amsterdam-St. Paul hotspot, Southeast Indian Ridge.  Earth Planet. Sci. Lett. 183, 245-259.

Burnard, P. G., D. W. Graham and K. A. Farley (2002) Mechanisms of magmatic gas loss along the Southeast Indian Ridge and the Amsterdam-St. Paul Plateau. Earth Planet. Sci. Lett. 203, 131-148.

Graham, D. W., J. Blichert-Toft, C. J. Russo, K. A. Rubin and F. Albarède (2006) Cryptic striations in the upper mantle revealed by hafnium isotopes in Southeast Indian Ridge basalts. Nature, 440, 199-202.

Nicolaysen, K. E., F. A. Frey, J. J. Mahoney, K. T. M. Johnson and D. W. Graham (2007) Influence of the Amsterdam/St. Paul hotspot along the Southeast Indian Ridge between 77° and 88°E: correlations of Sr, Nd, Pb and He isotopic variations with ridge segmentation. Geochem. Geophys. Geosys. 7. doi:10.1029/2006GC001540.
DOI: 10.1594/ieda/100692
title: Uranium series and Sr, Nd, and Pb isotopic measurements of seafloor hydrothermal samples

description: This dataset contains U-series disequilibria measurements of sulfides and anhydrite collected from seafloor hydrothermal systems. Age constraints derived from U-series disequilibria will be compared with independent age constraints, which will provide important constraints on the utility of uranium series dating of seafloor hydrothermal samples. Sr, Nd, and Pb isotopic compositions are included to evaluate seawater-hydrothermal fluid mass balance.
DOI: 10.1594/ieda/100696
title: Precision and accuracy of glass analyses by electron microprobe (EMP) at Uppsala University

description: In situ analysis of glass requires matrix-matched standards for timely assessment of the accuracy and precision of the results. We provide data to constrain the precision and accuracy of glass analyses by FEG-EMP at Uppsala University. Seven of the DING glasses that represent a broad spectrum of compositions were used to test for accuracy and precision (Jochum et al., 2006). Multiple analyses were performed on each glass; ML3B (n=30), STHs 6/80 (n=43), ATHO (n=54), KL2 (n=30), GOR-132 (n=30), GOR-128 (n=38) and T1 (n=36).
Glass analysis was performed using a field emission gun JEOL JXA-8530F Hyperprobe electron probe microanalyser at Uppsala University. The analytical conditions were 15 kV accelerating voltage and 4 nA probe current with a defocused beam of 5 to 10 micron diameter. Measurements were conducted with counting times of 10 s on peak and 5 s on lower and upper background and the PRZ correction method was applied to the data. Detection limits are typically ≤150 ppm. 
Despite different volatile contents, the DING glasses gave totals of 97.2±2.4 (2s.d.; n=241) and have been normalized to further assess the data quality. The precision of the analyses is reported as uncertainties at the 95% confidence level for major element oxides. When concentrations are &gt;30 wt% the uncertainties are 0.7 to 1.6% (2s.d.), for concentrations of 5 to 30 wt% uncertainties are &lt;7% (2s.d.) and at contents of 1 to 5 wt% uncertainties are &lt;10% (2s.d.). Comparison to the preferred values reported by Jochum et al. (2006) reveals a correlation of 1.0079.
description: Jochum et al., (2006) MPI-DING reference glasses for in situ microanalysis: New reference values for element concentrations and isotopes ratios. Geochemistry, Geophysics, Geosystems Q02008, doi: 10.1029/2005GC001060
DOI: 10.1594/ieda/100690
title: Santa Catalina Mountains Soil Solution Chemistry 2013 (Arizona, USA)

description: Soil solution samples in the Santa-Catalina Mountain field sites of the Catalina-Jemez Critical Zone Observatory (CZO) are collected with three types of soil solution samples: i) Prenart Super Quartz suction cups (www.prenart.dk) and ii) SoilMoisture suction cups (SoilMoisture Equipment Corp., Santa Barbara, CA) and iii) custom made zero-tension sampler (Hinckley et al., 2008). Prenart suction cups are optimized for all chemistry analyses and were installed without addition of Si-slurry to allow for artifact-free Si analyses. Applied suction for each Prenart is ~ 50kPa and SoilMoisture suction cups are sampled with a suction of 70-80kpa. Both suction cup types are optimized for all chemistry analyses with the exception of dissolved organic matter in the case of the SoilMoisture ones (due to potential sorption of DOM on the porous ceramic material). Zero-tension samplers are optimized for water flux determination at saturated flow and sampling for various chemistry analyses. In Marshall Gulch there are 8 SoilMoisture suction cups in the schist site and 7 in the granite site in both convergent and divergent landscape positions. These soil solution samplers are co-located with piezometers measuring water table depth within the soil profile. In the Oracle Ridge site there are 8 pits each equipped with 2 Prenarts and 1 SoilMoisture ceramic cup lysimeter. These samplers are co-located with Decagon Em5b data loggers with EC-5 soil moisture sensors and ECT soil temperature sensors. The B2 Desert site Schist and a Granite sites are both equipped with 7 zero-tension samplers (Hinckley et al., 2008) in both divergent and convergent landscape positions as well one SoilMoisture ceramic cup lysimeter. These samplers are co-located with Decagon Em5b data loggers with EC-5 soil moisture sensors and ECT soil temperature sensors.
description: Trostle, K.D., Runyon, J.R., Pohlmann, M.A., Redfield, S.E., Pelletier, J., McIntosh, J., and Chorover, J. (2016) Colloids and Organic Matter Complexation Control Trace Metal Concentration-Discharge Relationships in Marshall Gulch Stream. Water Resources Research, 52(10): 7931–7944, doi: 10.1002/2016WR019072.
DOI: 10.15468/dl.meprj6
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
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 "SpeciesKey is Polydesmus taranus Verhoeff, 1936",
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 The dataset includes 2 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0080769-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.26819653
title: anti_galamsey_study_data.xlsxThe Successes and Failure of Nana Akufo-Addo's Anti-Galamsey Fight

description: This Project Assessed the Successes and Failures of Nana Akuffo-Addo's Anti-Galamsey Fight
DOI: 10.6084/m9.figshare.26819653.v1
title: anti_galamsey_study_data.xlsxThe Successes and Failure of Nana Akufo-Addo's Anti-Galamsey Fight

description: This Project Assessed the Successes and Failures of Nana Akuffo-Addo's Anti-Galamsey Fight
DOI: 10.5517/ccdc.csd.cc2bwpfc
title: CCDC 2171563: Experimental Crystal Structure Determination

description: Related Article: Xin Yan, Dong-Xin Ji, Zhi-Min Jin, Jia-Qian Chen, Yun-Hong Xi, An-Na Sun|2022|J.Mol.Struct.|1276|134700|doi:10.1016/j.molstruc.2022.134700
description: Related Article: Donglin Wu, Yunhong Xi, Maolin Hu|2022|U.S.Patents|||
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc2c0fkd
title: CCDC 2175163: Experimental Crystal Structure Determination

description: Related Article: Chun-Pu Chen, Yu-Feng Wang, Pei Qin, Hua-Hong Zou, Fu-Pei Liang|2023|Inorg.Chim.Acta|547|121343|doi:10.1016/j.ica.2022.121343
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.15468/dl.5kzd8c
title: Occurrence Download

description: A dataset containing 6792 species occurrences available in GBIF matching the query:
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 The dataset includes 6792 records from 169 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0080770-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4eve86
title: Occurrence Download

description: A dataset containing 106 species occurrences available in GBIF matching the query:
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 The dataset includes 106 records from 19 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0080771-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.pz9v97
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
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 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0080772-240626123714530/datasets/export for details.
DOI: 10.15468/dl.32xy5v
title: Occurrence Download

description: A dataset containing 163 species occurrences available in GBIF matching the query:
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 The dataset includes 163 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0080774-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.