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  • PANGAEA  (17)
  • 2020-2024  (13)
  • 2010-2014  (1)
  • 1980-1984  (3)
Collection
Keywords
Publisher
Years
Year
  • 1
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    Stable isotopes covering 96-7 ka BP from stalagmite CM (Santo Tomas Cave, Cuba) (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: We present a new speleothem trace element and stable isotope record, which extends previous paleoclimate evidence from Cuban speleothems to the last 96 ka. Stable isotope samples were micromilled at a resolution of 0.10-0.33mm, and measured using an IRMS equipped with a Gasbench. Line scans of Element/Calcium ratios of the speleothem were measured by laser ablation ICPMS and were reduced to the resolution of the stable isotope records.
    Keywords: AGE; Central America; Mass spectrometer DeltaPlusXL coupled to a Gasbench II; paleoclimatology; Santo Tomas Cave, Cuba; speleothem; Speleothem sample; SPS; Stable isotopes; Stalagmite Cuba Medio; STC-CM; δ13C, stacked; δ18O, stacked
    Type: Dataset
    Format: text/tab-separated-values, 3568 data points
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    DATA PANGAEA
  • 2
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    Trace element data covering 96-7 ka BP from stalagmite CM (Santo Tomas Cave, Cuba) (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: We present a new speleothem trace element and stable isotope record, which extends previous paleoclimate evidence from Cuban speleothems to the last 96 ka. Stable isotope samples were micromilled at a resolution of 0.10-0.33mm, and measured using an IRMS equipped with a Gasbench. Line scans of Element/Calcium ratios of the speleothem were measured by laser ablation ICPMS and were reduced to the resolution of the stable isotope records.
    Keywords: AGE; Barium/Calcium ratio; Central America; Laser-ablation inductively coupled plasma sector field mass spectrometer (LA-ICP-SF-MS); Magnesium/Calcium ratio; paleoclimatology; Phosphorus/Calcium ratio; Santo Tomas Cave, Cuba; speleothem; Speleothem sample; SPS; Stalagmite Cuba Medio; STC-CM; Strontium/Calcium ratio; trace elements; Uranium/Calcium ratio
    Type: Dataset
    Format: text/tab-separated-values, 11205 data points
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    DATA PANGAEA
  • 3
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    Analysis of 10Be and Th isotopes in manganese nodules (1982)
    PANGAEA
    In:  Supplement to: Krishnaswami, Seth; Mangini, Augusto; Thomas, J H; Sharma, P; Cochran, J Kirk; Turekian, Karl K; Parker, P D (1982): 10Be and Th isotopes in manganese nodules and adjacent sediments: Nodule growth histories and nuclide behavior. Earth and Planetary Science Letters, 59(2), 217-234, https://doi.org/10.1016/0012-821X(82)90127-3
    Details
    Publication Date: 2023-08-28
    Description: The usefulness of cosmogenic beryllium-10 (half life = 2.5 Ma) for studying the rates of accumulation of ferromanganese nodules is reported based on its measured depth distribution in the top 20 mm of these deposits. Accumulation rates have been obtained in the range of 1 to 4 mm/Ma, which are in good agreement with rates determined using the 230Th method on the same nodules. The use of 10Be offers promise in extending the dating to the outer few cm of the nodules. This contrasts with conventional methods using 230Th and 231Pa isotopes which, due to their comparatively short half lives, are limited to a few mm at the surface of the nodules. Detailed studies of 10Be in the manganese deposits coupled with other trace element analyses should prove valuable in understanding the processes of formation of these deposits and the chronology of events recorded by them.
    Keywords: ARRH-TF; BC; Box corer; DOMES-A47-16; Dredge; DRG; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 4
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    Main metals composition (wt % of dried substance) for manganese crusts retrieved in the Pacific Ocean during the SO-18 (MIDPAC 1) campaign (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Manganese crust samples were dredged from the Line Islands Ridge and the MidPacific Mountains that were recently taken during the R/V Sonne SO18 (Midpac 81) cruise. The metal composition of the outermost millimetre of the crusts where growth rates were determined is given in Table 1. The concentrations were measured on dried substance. Mn, Fe were determined by potentiometric and complexometric titration methods; Ni, Cu, Co were analysed using differential pulse polarography. All analytical data are results of repeated determinations having 〈1% of relative error for main constituents (Mn, Fe), and 〈5% of relative error for minor constituents (Ni, Co, Cu).
    Keywords: Cobalt; Copper; Deposit type; DEPTH, sediment/rock; Differential pulse polarography; Dredge; DRG; Elevation of event; Event label; Geochemistry; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; MIDPAC I; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific Ocean; ocean; Pacific Oean; Potentiometric and complexometric titriation; sediment; SO18; SO18_111; SO18_32; SO18_57; SO18_73; SO18_76; Sonne
    Type: Dataset
    Format: text/tab-separated-values, 35 data points
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  • 5
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    10Be and 9Be isotopes composition of Mn nodule 44 TKD and Mn crust 40 TKD retrieved in the South China sea during expedition SO23/2 (R/V Sonne) (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: During the campaign SO23/2 (R/V Sonne) in the South China sea various manganese deposits were retrieved by dredging. Two representative samples were selected for chemical analysis: one Mn crust (0.4 cm thick) attached to a vesicular olivine basalt fragment for station 40KD and one irregular spheroidal shaped Mn nodule with rough surface and a Miocene chalk core for station 44KD. Their chemical composition was determined by X-ray fluorescence analysis on the grounded bulk sample.
    Keywords: 40KD; 44KD; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-9; Beryllium-9, standard deviation; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; manganese micronodule; manganese nodule; Mass spectrometry; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; sediment; SO23/2; SO23/2_40KD; SO23/2_44KD; Sonne; Zulu Sea
    Type: Dataset
    Format: text/tab-separated-values, 253 data points
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    DATA PANGAEA
  • 6
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    Th and U isotopes composition of Mn nodule 44 TKD and Mn crust 40 TKD retrieved in the South China sea during expedition SO23/2 (R/V Sonne) (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: During the campaign SO23/2 (R/V Sonne) in the South China sea various manganese deposits were retrieved by dredging. Two representative samples were selected for chemical analysis: one Mn crust (0.4 cm thick) attached to a vesicular olivine basalt fragment for station 40KD and one irregular spheroidal shaped Mn nodule with rough surface and a Miocene chalk core for station 44KD. In order to study the distribution of Th and U with distance, samples were drilled and the result was divided in equal parts. Liquid chromatography was used to separate and purify the Th isotopes. U and Th concentrations were determined using alpha spectrometry and 232Th isotope using atomic absorption spectroscopy.
    Keywords: 40KD; 44KD; Alpha spectrometry; Atomic absorption spectroscopy; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; manganese micronodule; manganese nodule; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; sediment; SO23/2; SO23/2_40KD; SO23/2_44KD; Sonne; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Zulu Sea
    Type: Dataset
    Format: text/tab-separated-values, 257 data points
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    DATA PANGAEA
  • 7
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    (Tables 1 to 3, pages 221-222) Th isotope data for three manganese nodules of the Pacific Ocean (1982)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: Alpha spectrometry; ARRH-TF; BC; Box corer; Deposit type; DEPTH, sediment/rock; DISTANCE; Distance, maximum; Distance, minimum; DOMES-A47-16; Dredge; DRG; Event label; Identification; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Thorium-227; Thorium-227, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186
    Type: Dataset
    Format: text/tab-separated-values, 334 data points
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  • 8
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    (Supplementary Table 1) 230Th/U results for stalagmite Cuba Grande (CG) from Pinar del Rio (2010)
    PANGAEA
    In:  Supplement to: Fensterer, Claudia; Scholz, Denis; Hoffmann, Dirk L; Mangini, Augusto; Pajon, Jesus M (2010): 230Th/U-dating of a late Holocene low uranium speleothem from Cuba. IOP Conference Series: Earth and Environmental Science, 9(1), 012015, https://doi.org/10.1088/1755-1315/9/1/012015
    Details
    Publication Date: 2023-10-28
    Description: We present 22 U-series ages for a stalagmite from north-western Cuba based on multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) and thermal ionisation mass spectrometry (TIMS). Our results reveal that the stalagmite continuously grew within the last ~1400a. Low uranium content of the sample and thus, extremely low 230Th concentrations limit the precision and accuracy of 230Th/U-dating by TIMS. Samples measured by MC-ICPMS show a high variability of 232Th content along the growth axis with some sections significantly affected by initial 230Th from a detrital phase. An a-priori bulk earth ratio for (238U/232Th) cannot be used to accurately account for this initial 230Th. Using an age model based on the 230Th/U ages determined on samples with low or negligible 232Th concentration, we find that the (238U/232Th) activity ratio of the detrital phase is an order of magnitude larger than the bulk earth value, indicating the importance of an accurately determined correction factor.
    Keywords: Age, comment; Age, dated; Age, dated standard deviation; CG; Cuba_Grande; DISTANCE; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Pinar del Rio (NW Cuba); Speleothem sample; SPS; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230/Uranium-238 activity ratio, standard deviation; Thorium-230/Uranium-238 ratio; Thorium-232; Thorium-232, standard deviation; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 351 data points
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  • 9
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    Stable isotope and trace element data covering 46.2-15.5 ka BP from stalagmite PR-LA-1 (Cueva Larga, Puerto Rico) (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Keywords: AGE; Aluminium/Calcium ratio; Barium/Calcium ratio; Cueva Larga, Puerto Rico; DISTANCE; Isotope ratio mass spectrometer (IRMS) with a GasBench; LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer; Magnesium/Calcium ratio; Phosphorus/Calcium ratio; PR-LA-1; Sample ID; speleothem; Speleothem sample; SPS; Stable isotopes; Strontium/Calcium ratio; Thorium/Calcium ratio; trace elements; Uranium/Calcium ratio; δ13C, carbonate; δ18O, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 20317 data points
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  • 10
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    Analytical data for Ti, Mo, and Pb in selected nodules from different stations in the Aitutaki Passage (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Manganese nodules and crusts from stations of the SO06 expedition (R/V Sonne) in the Aitutaki Passage have been selected for chemical analysis of Ti, Mo and Pb using atomic absorption spectrophotometry. Material has been dried before analysis at 105°C for 72 hrs and results are presented as averages over various size fractions.
    Keywords: Atomic absorption spectrophotometry; BCR; Box corer (Reineck); Deposit type; DEPTH, sediment/rock; Elevation of event; Event label; FFGR; Free-fall grab; Geochemistry; Identification; Latitude of event; Lead; Longitude of event; manganese micronodule; manganese nodule; Molybdenum; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Nodules, size; ocean; Pacific Ocean; Sample type; sediment; Shape; SO06; SO06_155GB; SO06_165GB; SO06_192GB; SO06_202KG; SO06_208GB; SO06_229GB; SO06_240GB; SO6/2-K-Loc24-155; SO6/2-K-Loc25-165; SO6/2-K-Loc27-192; SO6/2-K-Loc30-202; SO6/2-K-Loc31-208; SO6/2-K-Loc34-229; SO6/2-K-Loc36-240; Sonne; Texture; Titanium
    Type: Dataset
    Format: text/tab-separated-values, 421 data points
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    DATA PANGAEA
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