Citation:

PANGAEA.981521

Name: Evidence for millennial-scale interactions between Hg cycling and hydroclimate from Lake Bosumtwi, Ghana
Published: 2025-04-28
License: https://creativecommons.org/licenses/by/4.0/
Keywords: biogeochemical cycles; lake sediment proxies; mercury; organic carbon content; XRF

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Published: 2025-04-28 • DOI registered: 2025-05-27

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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 %.

Keyword(s):

biogeochemical cycles; lake sediment proxies; mercury; organic carbon content; XRF

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):

GLAD6_BOS04_5B * Latitude: 6.506002 * Longitude: -1.410212 * Date/Time Start: 2004-07-15T00:00:00 * Date/Time End: 2004-10-15T00:00:00 * Location: Lake Bosumtwi, Ghana * Method/Device: Core (CORE)

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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Sec label	2 Depth sed [m]	3 Hg [µg/kg]	4 TOC [%]	5 TIC [%]	6 Acc rate Hg [mg/m²/ka]	7 DBD [g/cm³]	8 Age [ka BP]
16H-2	47.724	31.0	2.02	0.81		1.1752	96.19
16H-2	47.324	20.0	5.52	0.50	21.47	1.1752	95.75
16H-2	47.124	85.0	3.07	1.26	91.24	1.1752	95.54
16H-2	46.924	36.0	2.16	1.30	38.64	1.1752	95.32
16H-2	46.724	20.0	1.74	0.64	19.62	1.0738	95.10
16H-1	46.521	20.0	3.13	0.62	19.62	1.0738	94.88
16H-1	46.321	25.0	2.30	1.26	27.43	1.2012	94.66
16H-1	46.121	15.0	2.45	1.37	16.47	1.2012	94.44
16H-1	45.921	18.0	2.86	1.73	19.77	1.2012	94.22
16H-1	45.721	8.6	2.35	1.09	9.45	1.2012	94.00
16H-1	45.331	16.0	2.51	0.82	17.57	1.2012	93.57
16H-1	45.221	10.0	2.24	1.14	10.98	1.2012	93.45
15H-2	44.903	19.0	2.42	1.57	19.38	1.1154	93.11
15H-2	44.703	14.0	3.35	2.20	14.28	1.1154	92.89
15H-2	44.503	15.0	2.49	1.03	15.30	1.1154	92.67
15H-2	44.303	16.0	3.71	1.81	16.32	1.1154	92.45
15H-2	43.903	26.0	2.48	0.40	26.36	1.1154	92.01
15H-2	43.703	16.0	4.77	1.42	17.37	1.2012	91.79
15H-1	43.627	19.0	4.39	1.42	20.63	1.2012	91.70
15H-1	43.427	28.0	1.59	0.25	15.46	0.6110	91.48
15H-1	43.027	13.0	1.95	0.27	7.18	0.6110	91.04
15H-1	42.827	18.0	3.43	1.39	9.94	0.6110	90.82
15H-1	42.727	47.0	1.76	0.27	25.95	0.6110	90.71
15H-1	42.627	19.0	1.57	0.15	10.49	0.6110	90.60
15H-1	42.227	23.0	1.53	0.24	24.79	1.2090	90.15
14H-2	41.928	24.0	1.49	0.53	25.51	1.2090	89.81
14H-2	41.788	18.0	2.22	0.45	19.46	1.2298	89.65
14H-2	41.588	10.0	1.72	0.52	10.81	1.2298	89.42
14H-2	41.388	23.0	1.63	0.78	24.87	1.2298	89.19
14H-2	40.988	13.0	3.51	1.63	14.06	1.2298	88.74
14H-2	40.788	13.0	2.98	2.27	8.92	0.7800	88.51
14H-1	40.598	39.0	2.98	1.99	26.75	0.7800	88.30
14H-1	40.398	21.0	1.12	1.24	21.75	1.1778	88.07
14H-1	40.198	20.0	1.12	0.67	20.71	1.1778	87.84
14H-1	39.798	20.0	2.01	0.73	17.98	1.1778	87.32
14H-1	39.598	24.0	1.55	0.99	21.58	1.1778	87.05
14H-1	39.398	24.0	7.64	3.85	21.58	1.1778	86.79
13H-1	36.992	23.0	8.31	4.02	15.42	0.9334	83.44
13H-1	36.772	62.0	3.46	1.84	38.58	0.9334	83.11
13H-1	36.312	16.0	10.88	4.86	9.96	0.9334	82.42
12H-1	33.560	15.0	0.72	0.40	11.61	1.6458	76.57
12H-1	33.232	15.0	1.06	0.43	7.60	1.6562	75.50
12H-1	33.032	20.0	0.92	0.50	10.03	1.6380	74.85
11H-2	32.839	9.7	0.73	0.53	4.86	1.6380	74.22
11H-2	32.639	72.0	4.22	0.45	37.78	1.7134	73.56
11H-2	32.439	115.0	11.74	0.38	60.26	1.7134	72.91
11H-2	32.249	110.0	10.86	1.46	57.73	1.7134	72.29
11H-2	32.049	69.0	9.31	0.28	36.15	1.7134	71.63
11H-2	31.849	67.0	13.01	0.73	32.32	1.7134	70.92
11H-2	31.449	105.0	14.24	0.70	8.38	0.2912	69.46
11H-1	31.234	134.0	9.89	0.18	10.69	0.2912	68.68
11H-1	31.034	56.0	7.33	0.28	4.47	0.2912	67.95
11H-1	30.844	73.0	11.94	0.41	5.82	0.2912	67.26
11H-1	30.654	78.0	3.28	0.61	6.23	0.2912	66.57
11H-1	30.454	57.0	3.03	0.68	4.55	0.2912	65.84
11H-1	30.264	29.0	2.41	0.44	2.32	0.2912	65.14
11H-1	30.074	31.0	3.07	0.83	7.88	0.9282	64.45
10H-2	29.801	27.0	4.59	0.46	12.18	0.9282	63.89
10H-2	29.611	37.0	6.11	0.70	17.26	0.9594	63.50
10H-2	29.411	26.0	4.93	0.45	12.13	0.9594	63.09
10H-2	29.211	26.0	5.56	0.39	12.13	0.9594	62.67
10H-2	29.011	34.0	6.59	0.43	15.86	0.9594	62.26
10H-2	28.811	72.0	3.42	1.67	33.58	0.9594	61.85
10H-2	28.611	105.0	3.99	0.75	48.97	0.9594	61.44
10H-1	28.411	64.0	3.88	0.61	31.22	1.0036	61.03
10H-1	28.221	107.0	10.22	0.27	44.09	0.8476	60.64
10H-1	28.021	58.0	5.42	0.18	23.90	0.8476	60.23
10H-1	27.821	99.0	9.41	1.06	38.72	0.8476	59.79
10H-1	27.621	65.0	12.79	0.34	25.42	0.8476	59.36
10H-1	27.421	97.0	12.20	0.33	37.94	0.8476	58.93
10H-1	27.221	118.0	12.34	0.20	46.15	0.8476	58.49
9H-2	26.774	83.0	11.09	0.71	0.40	0.0104	57.52
9H-2	26.674	134.0	15.65	0.39	4.50	0.0728	57.31
9H-2	26.474	25.0	5.23	0.31	0.84	0.0728	56.87
9H-2	26.274	88.0	2.92	1.52	2.96	0.0728	56.44
9H-2	26.074	71.0	6.26	0.79	2.39	0.0728	56.01
9H-2	25.874	74.0	7.19	0.99	2.43	0.0728	55.56
9H-2	25.674	63.0	3.07	2.53	2.07	0.0728	55.12
9H-1	25.290	20.0	3.32	1.48	5.93	0.6578	54.27
9H-1	24.890	60.0	3.83	1.02	9.29	0.3432	53.38
9H-1	24.490	20.0	2.83	1.85	3.10	0.3432	52.50
9H-1	24.090	13.0	1.17	1.94	2.01	0.3432	51.61
8H-2	23.081	99.0	5.88	0.91	11.45	0.2288	49.61
8H-2	22.881	57.0	3.02	0.79	6.80	0.2288	49.23
8H-1	22.281	154.0	7.60	0.78	50.51	0.6292	48.08
8H-1	21.881	67.0	5.92	0.61	21.97	0.6292	47.31
8H-1	21.481	56.0	12.28	0.27	30.30	0.6292	46.85
8H-1	21.081	114.0	10.20	0.40	61.67	0.6292	46.38
7H-2	20.542	70.0	22.15	0.29	15.96	0.2652	45.75
7H-2	20.442	171.0	7.35	1.87	28.29	0.1924	45.64
7H-2	20.242	53.0	14.86	1.91	34.72	0.7618	45.40
7H-2	20.042	58.0	9.43	1.28	8.38	0.4888	44.73
7H-2	19.242	76.0	11.58	3.53	0.00	0.0000	41.83
7H-1	19.037	52.0	12.82	1.82	5.38	0.4498	40.93
7H-1	18.837	133.0	7.87	1.37	13.75	0.4498	40.06
7H-1	18.637	37.0	8.09	0.98	3.83	0.4498	39.19
7H-1	18.437	33.0	7.13	1.55	3.41	0.4498	38.32
7H-1	18.037	72.0	4.48	1.41	9.09	0.4498	36.90
6H-2	17.824	77.0	11.26	0.34	13.26	0.4784	36.31
6H-2	17.424	63.0	9.67	0.18	4.30	0.1898	35.20
6H-2	17.224	308.0	13.20	0.12	21.04	0.1898	34.64
6H-2	17.024	61.0	7.14	0.71	5.03	0.1898	34.18
6H-2	16.824	49.0	8.73	1.64	4.04	0.1898	33.72
6H-2	16.424	101.0	15.50	0.44	0.00	0.0000	32.80
6H-1	15.060	81.0	7.76	1.23	14.99	0.2340	31.08
6H-1	15.040	52.0	7.09	1.22	9.63	0.2340	31.05
6H-1	15.030	85.0	5.90	1.06	15.73	0.2340	31.04
6H-1	15.020	34.0	6.35	1.88	6.29	0.2340	31.03
6H-1	15.010	32.0	8.00	1.58	5.92	0.2340	31.01
6H-1	15.000	82.0	6.58	1.17	15.18	0.2340	31.00
6H-1	14.990	54.0	7.48	1.43	10.00	0.2340	30.99
6H-1	14.970	52.0	7.79	0.46	9.63	0.2340	30.96
5H-2	13.480	114.0	6.45	0.51	42.44	0.4706	29.08
5H-2	13.470	27.0	7.51	0.57	10.05	0.4706	29.07
5H-2	13.460	43.0	6.97	0.78	16.01	0.4706	29.05
5H-2	13.450	24.0	8.25	0.62	8.93	0.4706	29.04
5H-1	13.230	181.0	6.96	1.17	67.38	0.4706	28.76
5H-1	12.830	63.0	8.60	0.40	24.36	0.4888	28.26
5H-1	12.610	57.0	5.58	0.47	52.91	0.4888	28.14
5H-1	12.210	32.0	3.86	1.27	29.70	0.4888	27.93
5H-1	12.010	33.0	4.99	0.72	35.03	0.5590	27.83
4H-2	11.357	41.0	3.05	1.37	17.41	0.5590	26.97
4H-2	11.157	49.0	6.72	0.92	7.34	0.2496	26.63
4H-2	10.957	135.0	4.84	0.97	20.23	0.2496	26.30
4H-2	10.757	46.0	7.97	1.07	6.89	0.2496	25.97
4H-2	10.557	94.0	7.41	1.38	8.66	0.1924	25.55
4H-2	10.357	34.0	7.55	1.49	3.13	0.1924	25.13
4H-1	10.119	48.0	5.28	0.96	4.42	0.1924	24.63
4H-1	9.919	54.0	6.96	2.35	4.98	0.1924	24.22
4H-1	9.724	80.0	8.40	1.43	5.58	0.1456	23.81
4H-1	9.572	83.0	8.22	2.48	3.73	0.1456	23.32
4H-1	8.777	85.0	9.61	1.80	4.43	0.1690	20.74
3H-2	7.883	89.0	12.61	0.86	8.48	0.2288	18.59
3H-2	7.483	114.0	14.68	0.36	19.02	0.2288	18.04
3H-2	7.283	158.0	8.98	0.80	151.96	0.3302	17.97
3H-1	7.073	62.0	5.46	1.03	59.63	0.3302	17.90
3H-1	6.873	102.0	7.11	2.19	98.10	0.3302	17.83
3H-1	6.673	83.0	7.64	1.72	0.00	0.0000	17.76
3H-1	6.473	79.0	6.32	0.78	5.98	0.0000	17.69
3H-1	6.273	79.0	6.81	1.25	0.00	0.0000	17.63
3H-1	5.873	46.0	8.16	1.47		0.0260	17.01
3H-1	5.683	87.0	3.64	0.97	0.82	0.0260	16.48
2H-2	5.057	113.0	8.99	1.99	0.89	0.0260	14.41
2H-2	4.657	121.0	9.31	1.47	2.66	0.0728	13.09
2H-2	4.457	350.0	12.98	0.13	18.17	0.1716	12.43
2H-2	4.257	236.0	12.55	0.18	12.25	0.1716	11.77
2H-2	4.057	207.0	15.00	0.14	9.00	0.1716	10.98
2H-1	3.862	370.0	15.50	0.19	16.09	0.1716	10.21
2H-1	3.418	284.0	18.56	0.19	9.49	0.1716	7.93
2H-1	2.882	115.0	17.29	0.24	0.00	0.0000	5.18
2H-1	2.672	377.0	22.95	0.53	0.00	0.0000	4.10
2H-1	2.592	104.0	16.77	0.69	0.00	0.0000	3.69
2H-1	2.392	66.0	19.43	0.35	7.55	0.5876	2.66
2H-1	2.336	199.0	18.26	0.26	22.77	0.5876	2.37
1H-2	1.894	80.0	4.58	0.26	11.80	0.5876	0.61
1H-2	1.694	63.0	5.95	0.19	113.25	0.5876	0.55
1H-2	1.494	65.0	11.85	0.14	115.79	0.5876	0.48
1H-2	1.294	68.0	11.33	1.43	121.14	0.5876	0.42
1H-2	1.094	68.0	7.81	1.10	63.67	0.3068	0.35
1H-2	0.894	65.0	7.17	0.49	60.86	0.3068	0.29
1H-1	0.600	118.0	11.08	0.26	0.00	0.0000	0.19
1H-1	0.400	85.0	6.82	0.34	0.00	0.0000	0.12
1H-1	0.200	61.0	6.50	0.80	41.81	0.2262	0.06