Evidence for millennial-scale interactions between Hg cycling and hydroclimate from Lake Bosumtwi, Ghana
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| Main Authors: | , , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| _version_ | 1867171898317602816 |
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| author | Paine, Alice R Frieling, Joost Shanahan, Timothy M Mather, Tamsin A McKay, Nicholas Robinson, Stuart A Pyle, David M Fendley, Isabel M Kiely, R Gosling, William D |
| author_facet | Paine, Alice R Frieling, Joost Shanahan, Timothy M Mather, Tamsin A McKay, Nicholas Robinson, Stuart A Pyle, David M Fendley, Isabel M Kiely, R Gosling, William D |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The datasets include measurements of mercury, total organic, and inorganic carbon in sediment samples from core BOS04-5B, extracted from Lake Bosumtwi in 2004 as part of the ICDP Lake Bosumtwi Drilling Project. Lake Bosumtwi is the only natural lake in Ghana, western Africa (6°300 N, 1°250 W), and occupies a meteorite impact crater dated to 1.08 ± 0.04 Ma: one of the youngest and best-preserved impact craters on Earth. Focusing on the uppermost ∼ 47 m of the BOS04-5B sediment record, this data was generated to assesses whether major shifts in local hydroclimate produced measurable changes in how Hg has been transported to, and buried within, this system since ∼ 96 ka. Total Hg (HgT) in the bulk sediments of the core was measured using an RA-915 portable mercury analyser with a PYRO-915+ pyrolyser, Lumex, at the University of Oxford (UK). For this study, we analysed 165 samples spanning the composite depth interval 47.7 to 0 m, with an average temporal resolution of ∼ 0.6 ka between each sample (range: 0.01 to 5.85 kyr). Quantitative values for total organic carbon (TOC) and total inorganic carbon (TIC) content were measured on the same powdered sample material also analysed for Hg, using a Stroehlein Coulomat 702 at the University of Oxford (UK). Analytical reproducibility for this instrument was ≤ 0.2% based on repeat measurements, with a detection limit of ca. 0.1 %-0.2 %. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_981521 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Evidence for millennial-scale interactions between Hg cycling and hydroclimate from Lake Bosumtwi, Ghana Paine, Alice R Frieling, Joost Shanahan, Timothy M Mather, Tamsin A McKay, Nicholas Robinson, Stuart A Pyle, David M Fendley, Isabel M Kiely, R Gosling, William D Accumulation rate, mercury; AGE; biogeochemical cycles; Calculated; Carbon, inorganic, total; Carbon, organic, total; Core; CORE; Core section label; Coulomat, STRÖHLEIN, 702; Density, dry bulk; DEPTH, sediment/rock; GLAD6_BOS04_5B; Lake Bosumtwi, Ghana; lake sediment proxies; Mercury; Mercury analyzer, Lumex Instruments, RA-915M; coupled with PYRO-915+ thermal decomposition attachment; organic carbon content; XRF The datasets include measurements of mercury, total organic, and inorganic carbon in sediment samples from core BOS04-5B, extracted from Lake Bosumtwi in 2004 as part of the ICDP Lake Bosumtwi Drilling Project. Lake Bosumtwi is the only natural lake in Ghana, western Africa (6°300 N, 1°250 W), and occupies a meteorite impact crater dated to 1.08 ± 0.04 Ma: one of the youngest and best-preserved impact craters on Earth. Focusing on the uppermost ∼ 47 m of the BOS04-5B sediment record, this data was generated to assesses whether major shifts in local hydroclimate produced measurable changes in how Hg has been transported to, and buried within, this system since ∼ 96 ka. Total Hg (HgT) in the bulk sediments of the core was measured using an RA-915 portable mercury analyser with a PYRO-915+ pyrolyser, Lumex, at the University of Oxford (UK). For this study, we analysed 165 samples spanning the composite depth interval 47.7 to 0 m, with an average temporal resolution of ∼ 0.6 ka between each sample (range: 0.01 to 5.85 kyr). Quantitative values for total organic carbon (TOC) and total inorganic carbon (TIC) content were measured on the same powdered sample material also analysed for Hg, using a Stroehlein Coulomat 702 at the University of Oxford (UK). Analytical reproducibility for this instrument was ≤ 0.2% based on repeat measurements, with a detection limit of ca. 0.1 %-0.2 %. |
| title | Evidence for millennial-scale interactions between Hg cycling and hydroclimate from Lake Bosumtwi, Ghana |
| topic | Accumulation rate, mercury; AGE; biogeochemical cycles; Calculated; Carbon, inorganic, total; Carbon, organic, total; Core; CORE; Core section label; Coulomat, STRÖHLEIN, 702; Density, dry bulk; DEPTH, sediment/rock; GLAD6_BOS04_5B; Lake Bosumtwi, Ghana; lake sediment proxies; Mercury; Mercury analyzer, Lumex Instruments, RA-915M; coupled with PYRO-915+ thermal decomposition attachment; organic carbon content; XRF |
| url | https://doi.org/10.1594/PANGAEA.981521 |