Paine, Alice R; Frieling, Joost; Shanahan, Timothy M; Mather, Tamsin A; McKay, Nicholas; Robinson, Stuart A; Pyle, David A; Fendley, Isabel M; Kiely, R; Gosling, William D (2025): Evidence for millennial-scale interactions between Hg cycling and hydroclimate from Lake Bosumtwi, Ghana [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.981521 (DOI registration in progress)
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Published: 2025-04-28
Abstract:
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 %.
Related to:
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 (2025): Evidence for millennial-scale interactions between Hg cycling and hydroclimate from Lake Bosumtwi, Ghana. Climate of the Past, 21(4), 817-839, https://doi.org/10.5194/cp-21-817-2025
Funding:
European Commission (EC), grant/award no. 818717: Revealing hidden volcanic triggers for global environmental change events in Earth's geological past using mercury (Hg)
Coverage:
Latitude: 6.506002 * Longitude: -1.410212
Date/Time Start: 2004-07-15T00:00:00 * Date/Time End: 2004-10-15T00:00:00
Minimum DEPTH, sediment/rock: 0.200 m * Maximum DEPTH, sediment/rock: 47.724 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Core section label | Sec label | Paine, Alice R | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Paine, Alice R | Geocode | |
| 3 | Mercury | Hg | µg/kg | Paine, Alice R | Mercury analyzer, Lumex Instruments, RA-915M; coupled with PYRO-915+ thermal decomposition attachment | |
| 4 | Carbon, organic, total | TOC | % | Paine, Alice R | Coulomat, STRÖHLEIN, 702 | [wt %] |
| 5 | Carbon, inorganic, total | TIC | % | Paine, Alice R | Coulomat, STRÖHLEIN, 702 | [wt %] |
| 6 | Accumulation rate, mercury | Acc rate Hg | mg/m2/ka | Paine, Alice R | Calculated | |
| 7 | Density, dry bulk | DBD | g/cm3 | Paine, Alice R | Calculated | |
| 8 | AGE | Age | ka BP | Paine, Alice R | Geocode |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
976 data points