Citation:

PANGAEA.982469

Name: Diatoms from DH-7B sediment core from the Dahu Lake, Ilan Plain
Published: 2025-05-16
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Diatom; Geochemistry; Stable isotope

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Published: 2025-05-16 • DOI registered: 2025-06-14

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Abstract:

A 35-meter-long sediment core (DH-7B) was retrieved from Dahu Lake using a stainless-steel pipe mounted on a floating platform. The core was subsampled at 5-cm intervals with 1-cm thickness for diatom, stable isotope, and trace element analyses. For diatom analysis, 0.5 g of dry sediment was treated with 32% H₂O₂ and 10% HCl. The cleaned material was mounted on slides using Wako mounting medium, and 300 diatom valves were identified and counted under an optical microscope at 1000× magnification.

Keyword(s):

Diatom; Geochemistry; Stable isotope

Coverage:

Latitude: 24.739200 * Longitude: 121.689300

Date/Time Start: 2008-01-01T14:00:00 * Date/Time End: 2008-01-01T14:00:00

Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 34.605 m

Event(s):

DH-7B (Dahu Lake) * Latitude: 24.739200 * Longitude: 121.689300 * Date/Time: 2008-01-01T14:00:00 * Elevation: 15.7 m * Location: Taiwan * Method/Device: Stainless steel corer

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Wang, Liang-Chi		Geocode
2	AGE	Age	ka BP	Wang, Liang-Chi		Geocode
3	Diatoms, planktic	Diatom plank	%	Wang, Liang-Chi	Counting, diatoms	optical microscope at 1000× magnification
4	Diatoms, benthic	Diatom benthic	%	Wang, Liang-Chi	Counting, diatoms	optical microscope at 1000× magnification
5	Diatoms, epiphytic	Diatom epiphyt	%	Wang, Liang-Chi	Counting, diatoms	optical microscope at 1000× magnification
6	Diatom valves, per unit sediment mass	Diatom valves/sed	#/g	Wang, Liang-Chi	Counting, diatoms	optical microscope at 1000× magnification

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

656 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 Diatom plank [%]	4 Diatom benthic [%]	5 Diatom epiphyt [%]	6 Diatom valves/sed [#/g]
0.005	-0.055	1	91	8	1.85E6
0.055	-0.034	5	89	7	1.98E6
0.105	-0.014	1	94	5	2.26E6
0.155	0.007	1	95	4	2.38E6
0.205	0.028	0	97	3	2.04E6
0.255	0.048	2	95	3	2.19E6
0.305	0.069	4	82	14	2.01E6
0.355	0.090	3	84	13	1.91E6
0.405	0.110	20	60	20	1.94E6
0.455	0.131	6	82	12	2.21E6
0.505	0.153	18	39	43	2.01E6
0.555	0.184	19	22	60	1.90E6
0.605	0.216	18	50	32	2.02E6
0.655	0.247	48	36	16	2.16E6
0.705	0.279	32	47	20	2.22E6
0.755	0.310	1	59	40	1.13E6
0.805	0.342	5	45	50	1.66E6
0.855	0.373	0	18	82	6.30E4
0.905	0.405	1	16	83	7.50E5
0.955	0.436	0	21	79	3.75E5
1.005	0.466	0	27	73	1.67E5
1.055	0.476	4	43	54	1.14E6
1.105	0.487	0	0	0	5.00E3
1.155	0.498	0	0	0	2.50E4
1.205	0.508	0	68	32	4.50E4
1.255	0.519	0	0	0	1.90E4
1.305	0.530	0	93	7	2.06E6
1.355	0.540	0	86	14	7.90E4
1.405	0.551	0	0	0	0.00E0
1.505	0.572	0	0	0	0.00E0
1.605	0.587	0	0	0	0.00E0
1.705	0.602	0	0	0	0.00E0
1.805	0.617	0	0	0	0.00E0
1.905	0.632	0	0	0	0.00E0
2.005	0.647	0	0	0	0.00E0
2.105	0.660	0	0	0	0.00E0
2.205	0.673	0	0	0	0.00E0
2.305	0.686	0	0	0	0.00E0
2.405	0.699	0	0	0	0.00E0
2.505	0.712	0	0	0	0.00E0
2.605	0.726	0	0	0	0.00E0
2.705	0.740	0	0	0	0.00E0
2.805	0.754	0	0	0	0.00E0
2.905	0.768	0	0	0	0.00E0
3.055	0.788	0	0	0	0.00E0
3.255	0.814	0	0	0	0.00E0
3.455	0.840	0	0	0	0.00E0
3.655	0.866	0	0	0	0.00E0
3.855	0.892	0	0	0	0.00E0
4.055	0.918	0	0	0	0.00E0
4.255	0.945	0	0	0	0.00E0
4.355	0.958	0	87	12	6.43E5
4.405	0.964	1	84	15	1.51E6
4.455	0.971	11	66	23	9.00E5
4.505	0.978	0	92	7	4.50E6
4.655	0.998	1	84	15	9.00E5
4.705	1.004	1	87	12	1.50E6
4.755	1.011	3	74	23	2.25E6
4.805	1.018	2	71	27	9.00E5
4.855	1.024	0	0	0	0.00E0
5.055	1.051	0	0	0	0.00E0
5.255	1.078	0	0	0	0.00E0
5.455	1.105	0	0	0	0.00E0
5.655	1.130	0	0	0	0.00E0
5.855	1.154	0	0	0	0.00E0
6.055	1.179	0	0	0	0.00E0
6.255	1.206	0	0	0	0.00E0
6.455	1.233	0	0	0	0.00E0
6.655	1.263	0	0	0	0.00E0
6.855	1.295	0	0	0	0.00E0
7.055	1.327	0	0	0	0.00E0
7.255	1.359	0	0	0	0.00E0
7.455	1.391	0	0	0	0.00E0
7.655	1.424	0	0	0	0.00E0
7.855	1.457	0	0	0	1.80E4
8.055	1.490	0	0	0	0.00E0
8.255	1.523	0	0	0	0.00E0
8.605	1.580	0	0	0	0.00E0
8.805	1.611	0	0	0	0.00E0
9.005	1.642	0	0	0	0.00E0
9.205	1.672	0	0	0	0.00E0
9.405	1.703	0	0	0	0.00E0
9.605	1.735	0	0	0	0.00E0
9.805	1.768	0	0	0	0.00E0
10.005	1.802	0	0	0	0.00E0
10.205	1.837	0	0	0	0.00E0
10.405	1.872	0	0	0	0.00E0
10.605	1.907	0	0	0	0.00E0
10.805	1.941	0	0	0	0.00E0
11.005	1.975	0	0	0	0.00E0
11.205	2.008	0	0	0	0.00E0
11.405	2.041	0	0	0	0.00E0
11.605	2.074	0	0	0	0.00E0
11.805	2.105	0	0	0	0.00E0
12.005	2.136	7	30	63	1.02E5
12.055	2.144	4	32	64	1.25E5
12.105	2.153	3	69	28	3.75E5
12.205	2.171	0	36	63	3.75E5
13.005	2.416	0	0	0	0.00E0
14.005	2.900	0	0	0	0.00E0
15.005	3.383	0	0	0	0.00E0
16.005	3.694	2	20	78	7.50E5
16.155	3.738	0	84	15	6.90E6
16.205	3.752	5	19	76	6.43E5
16.255	3.767	1	12	87	4.09E5
16.305	3.781	1	16	83	4.09E5
16.355	3.796	2	14	84	6.43E5
16.405	3.810	0	0	0	5.50E4
16.455	3.825	0	0	0	7.10E4
16.655	3.893	0	0	0	0.00E0
16.705	3.911	0	0	0	1.00E4
16.755	3.929	0	0	0	5.50E4
17.005	4.018	0	0	0	0.00E0
17.105	4.055	0	0	0	6.00E4
17.155	4.073	0	0	0	9.00E4
17.205	4.092	0	0	0	0.00E0
17.255	4.110	0	0	0	0.00E0
17.305	4.129	0	0	0	0.00E0
17.355	4.147	0	0	0	0.00E0
17.405	4.166	0	0	0	0.00E0
18.005	4.390	0	0	0	0.00E0
19.005	4.807	0	0	0	0.00E0
19.055	4.827	2	17	81	5.63E5
19.105	4.846	0	20	79	2.78E5
19.505	5.001	7	35	58	9.00E5
19.555	5.019	0	0	0	5.00E3
19.955	5.164	0	0	0	0.00E0
20.005	5.182	0	0	0	0.00E0
21.005	5.532	0	0	0	0.00E0
22.005	5.849	0	0	0	0.00E0
22.305	5.946	0	0	0	0.00E0
23.005	6.115	0	0	0	0.00E0
24.005	6.279	0	0	0	0.00E0
25.005	6.442	0	0	0	0.00E0
25.705	6.554	0	0	0	0.00E0
25.855	6.579	0	71	29	1.61E6
25.905	6.588	1	6	93	2.12E6
25.955	6.596	0	80	20	2.08E6
26.005	6.604	1	8	91	2.25E6
26.055	6.612	2	34	64	3.77E5
26.105	6.620	2	14	84	9.00E5
26.155	6.627	2	10	87	3.19E5
26.205	6.635	0	0	0	8.50E4
26.255	6.642	0	0	0	0.00E0
26.305	6.650	0	0	0	0.00E0
26.355	6.658	0	0	0	0.00E0
26.405	6.665	0	0	0	0.00E0
26.605	6.692	0	0	0	0.00E0
26.655	6.697	0	0	0	0.00E0
27.005	6.737	0	0	0	0.00E0
28.005	6.851	0	0	0	0.00E0
29.005	6.961	0	0	0	0.00E0
30.005	7.071	0	0	0	0.00E0
31.005	7.179	0	0	0	0.00E0
32.005	7.288	0	0	0	0.00E0
32.105	7.300	0	0	0	0.00E0
32.155	7.306	0	0	0	0.00E0
32.205	7.312	0	0	0	0.00E0
32.255	7.317	0	0	0	0.00E0
32.305	7.323	0	0	0	0.00E0
33.005	7.403	0	0	0	0.00E0
33.705	7.482	0	0	0	5.00E4
34.005	7.516	0	0	0	5.00E3
34.605	7.589	0	0	0	0.00E0