# Uranium/Thorium isotopic composition of various mid-late Holocene features collected from twelve islands in French Polynesia.

Nadine Hallmann, Gilbert Camoin, Anton Eisenhauer, Elias Samankassou, Claude Vella, Alberic Botella, Glenn A. Milne, Virginie Pothin, Philippe Dussouillez, Jules Fleury, et al.

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## To cite this version:

Nadine Hallmann, Gilbert Camoin, Anton Eisenhauer, Elias Samankassou, Claude Vella, et al. Uranium/Thorium isotopic composition of various mid-late Holocene features collected from twelve islands in French Polynesia. 2021, 10.1594/PANGAEA.927589. hal-03432427

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Submitted on 17 Nov 2021

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## Citation:

Hallmann, Nadine; Camoin, Gilbert; Eisenhauer, Anton; Samankassou, Elias; Vella, Claude; Botella, A; Milne, Glenn A; Pothin, Virginie; Dussouillez, Philippe; Fleury, Jules; Fietzke, Jan; Goepfert, Tyler J (2021): Uranium/Thorium isotopic composition of various mid-late Holocene features collected from twelve islands in French Polynesia. PANGAEA, https://doi.org/10.1594/PANGAEA.927589

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## Abstract:

Uranium/Thorium isotopic composition of 165 samples from various mid-late Holocene features, such as in situ Porites microatolls, in situ reef flats, conglomerates and reworked reef blocks, collected from twelve islands in French Polynesia. Recommendations of Dutton et al. (2017) were followed for the presentation of U/Th age data. For each parameter, the first column contains the value and the second column the statistical error. All statistical errors are two standard deviations of the mean (2σ mean). All samples have been corrected for initial 230Th by using a 230Th/232Th activity ratio of 0.66 ± 0.2 (Fietzke et al., 2005). Non-reported data consist of 230Th/232Th ratios which became negative due to background corrections. 238U Concentrations are not corrected for the background.

## Keyword(s):

French Polynesia Q; low-lying islands Q; mid-late Holocene sea level Q; Porites microatolls Q; reef development Q; storm deposits Q; U-series dating Q

## Related to:

Hallmann, Nadine; Camoin, Gilbert; Eisenhauer, Anton; Samankassou, Elias; Vella, Claude; Botella, A; Milne, Glenn A; Pothin, Virginie; Dussouillez, Philippe; Fleury, Jules; Fietzke, Jan; Goepfert, Tyler J (2021): Characteristics, elevations and ages of various mid-late Holocene features collected from twelve islands in French Polynesia. PANGAEA, https://doi.org/10.1594/PANGAEA.927586

Hallmann, Nadine; Camoin, Gilbert; Eisenhauer, Anton; Samankassou, Elias; Vella, Claude; Botella, A; Milne, Glenn A; Pothin, Virginie; Dussouillez, Philippe; Fleury, Jules; Fietzke, Jan; Goepfert, Tyler J (2020): Reef response to sea-level and environmental changes in the Central South Pacific over the past 6000 years. *Global and Planetary Change*, **195**, 103357, https://doi.org/10.1016/j.gloplacha.2020.103357

## Further details:

Dutton, Andrea; Rubin, Ken H; McLean, Noah; Bowring, James F; Bard, Edouard; Edwards, Ross L; Henderson, Gideon M; Reid, Malcolm R; Richards, David A; Sims, Kenneth W W; Walker, James Douglas; Yokoyama, Yusuke (2017): Data reporting standards for publication of U-series data for geochronology and timescale assessment in the earth sciences. *Quaternary Geochronology*, **39**, 142-149, https://doi.org/10.1016/j.quageo.2017.03.001

Fietzke, Jan; Liebetrau, Volker; Eisenhauer, Anton; Dullo, C (2005): Determination of uranium isotope ratios by multi-static MIC-ICP-MS: method and implementation for precise U- and Th-series isotope measurements. *Journal of Analytical Atomic Spectrometry*, **20(5)**, 395, https://doi.org/10.1039/B415958F

Hallmann, Nadine; Camoin, Gilbert; Eisenhauer, Anton; Botella, A; Milne, Glenn A; Vella, Claude; Samankassou, Elias; Pothin, Virginie; Dussouillez, Philippe; Fleury, Jules; Fietzke, Jan (2018): Ice volume and climate changes from a 6000 year sea-level record in French Polynesia. *Nature Communications*, **9(1)**, https://doi.org/10.1038/s41467-017-02695-7

Hallmann, Nadine; Camoin, Gilbert; Eisenhauer, Anton; Botella, A; Milne, Glenn A; Vella, Claude; Samankassou, Elias; Pothin, Virginie; Dussouillez, Philippe; Fleury, Jules; Fietzke, Jan (2017): Measurements of elevations and absolute ages of Mid- to Late Holocene coral microatolls from French Polynesia. PANGAEA, https://doi.org/10.1594/PANGAEA.883846

## Coverage:

Median Latitude: 16.993393 * Median Longitude: 147.169415 * South-bound Latitude: 14.332200 * West-bound Longitude: 134.939200 * North-bound Latitude: 23.903900 * East-bound Longitude: 152.262400

## Event(s):

French_Polynesia_BOB (Bora Bora) Q * Latitude: -16.479000 * Longitude: -151.729800 * Location: French Polynesia Q * Method/Device: Sampling by hand (HAND) Q

French_Polynesia_FAK (Fakarava) Q * Latitude: -16.209847 * Longitude: -145.591820 * Location: French Polynesia Q * Method/Device: Sampling by hand (HAND) Q

French_Polynesia_GAM (Gambier) Q * Latitude: -23.009540 * Longitude: -134.939593 * Location: French Polynesia Q * Method/Device: Sampling by hand (HAND) Q

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## Parameter(s):

<table><thead><tr><th>#</th><th>Name</th><th>Short Name</th><th>Unit</th><th>Principal Investigator</th><th>Method/Device</th><th>Comment</th></tr></thead><tbody><tr><td>1</td><td>Event label Q</td><td>Event</td><td></td><td>Hallmann, Nadine Q</td><td></td><td></td></tr><tr><td>2</td><td>Sample ID Q</td><td>Sample ID</td><td></td><td>Hallmann, Nadine Q</td><td></td><td></td></tr><tr><td>3</td><td>LATITUDE Q</td><td>Latitude</td><td></td><td>Hallmann, Nadine Q</td><td></td><td>Geocode</td></tr><tr><td>4</td><td>LONGITUDE Q</td><td>Longitude</td><td></td><td>Hallmann, Nadine Q</td><td></td><td>Geocode</td></tr><tr><td>5</td><td>Uranium-238 Q</td><td>238U</td><td>mg/kg</td><td>Hallmann, Nadine Q</td><td></td><td></td></tr><tr><td>6</td><td>Uranium-238, standard deviation Q</td><td>238U std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>7</td><td>Thorium-230 Q</td><td>230Th</td><td>ng/kg</td><td>Hallmann, Nadine Q</td><td></td><td></td></tr><tr><td>8</td><td>Thorium-230, standard deviation Q</td><td>230Th std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>9</td><td>Thorium-232 Q</td><td>232Th</td><td>µg/kg</td><td>Hallmann, Nadine Q</td><td></td><td></td></tr><tr><td>10</td><td>Thorium-232, standard deviation Q</td><td>232Th std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>11</td><td>Thorium-230/Thorium-232 activity ratio Q</td><td>(230Th/232Th)</td><td></td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>12</td><td>Thorium-230/Thorium-232 activity ratio, standard deviation Q</td><td>(230Th/232Th) std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>13</td><td>Uranium-238/Thorium-232 activity ratio Q</td><td>(238U/232Th)</td><td></td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>14</td><td>Uranium-238/Thorium-232 activity ratio, standard deviation Q</td><td>(238U/232Th) std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>15</td><td>Thorium-230/Uranium-238 activity ratio Q</td><td>(230Th/238U)</td><td></td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>16</td><td>Thorium-230/Uranium-238 activity ratio, error, relative Q</td><td>(230Th/238U) e rel</td><td>%</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>17</td><td>Uranium-234/Uranium-238 activity ratio Q</td><td>(234U/238U)</td><td></td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>18</td><td>Uranium-234/Uranium-238 activity ratio, standard deviation Q</td><td>(234U/238U) std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td></td></tr><tr><td>19</td><td>Age, dated Q</td><td>Age dated</td><td>ka</td><td>Hallmann, Nadine Q</td><td>Age, Uranium-Thorium Q</td><td></td></tr><tr><td>20</td><td>Age, dated standard deviation Q</td><td>Age dated std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Age, Uranium-Thorium Q</td><td></td></tr><tr><td>21</td><td>Uranium-234/Uranium-238 activity ratio Q</td><td>(234U/238U)</td><td></td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td>Initial</td></tr><tr><td>22</td><td>Uranium-234/Uranium-238 activity ratio, standard deviation Q</td><td>(234U/238U) std dev</td><td>±</td><td>Hallmann, Nadine Q</td><td>Calculated Q</td><td>Initial</td></tr></tbody></table>

## License:

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## Size:

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## Datasets with similar metadata

Hallmann, N; Camoin, G; Eisenhauer, A et al. (2021): Characteristics, elevations and ages of various mid-late Holocene features collected from twelve islands in French Polynesia. https://doi.org/10.1594/PANGAEA.927586

Hallmann, N; Camoin, G; Eisenhauer, A et al. (2017): (Table S2) Uranium/Thorium isotopic composition of in situ Porites microatolls in French Polynesia. https://doi.org/10.1594/PANGAEA.883845

Hallmann, N; Camoin, G; Eisenhauer, A et al. (2017): Measurements of elevations and absolute ages of Mid- to Late Holocene coral microatolls from French Polynesia. https://doi.org/10.1594/PANGAEA.883846

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