Citation:

PANGAEA.980749

Name: Paleomagnetic records of core BKAS58PC from the southern South China Sea
Published: 2025-09-03
License: https://creativecommons.org/licenses/by/4.0/
Keywords: BKAS58PC; Paleomagnatic Secular Variation (PSV); South China Sea

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Published: 2025-09-03 • DOI registered: 2025-10-07

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Abstract:

This dataset contains inclination, corrected declination, and relative paleointensity (RPI) data from sediment core BKAS58PC, spanning the past 30 ka. The core was retrieved from the Beikang Ansha area in the southern South China Sea (SCS) using a gravity corer during the HYDZ4 cruise in 2014. The chronology of BKAS58PC was established based on 16 radiocarbon dates using Bacon program. Natural remanent magnetization (NRM) and stepwise alternating field (AF) demagnetization were performed using a 2G-760 superconducting rock magnetometer with peak magnetic fields ranging from 0 to 80 mT and steps of 10 mT. The inclination and declination data were obtained using principal component analysis of NRM demagnetization results, with at least five demagnetization steps used to isolate the characteristic remanent magnetization. Since the core was not azimuthally oriented during sampling, the declination was corrected by aligning the mean declination of the top three samples to the modern geomagnetic field direction. Relative paleointensity was estimated using the difference in the NRM versus saturation isothermal remanent magnetization ratio within the 20–50 mT demagnetization interval. The dataset provides high-resolution records of geomagnetic field variations in the southern SCS, contributing to regional and global paleomagnetic reconstructions.

Keyword(s):

BKAS58PC; Paleomagnatic Secular Variation (PSV); South China Sea

Related to:

Wu, Shuang; Zhang, Tingwei; Yang, Xiaoqiang; Zhu, Shiyu; Shang, Shengtan; Ye, Yulan (2025): A full-vector paleomagnetic record from the southern South China sea reveals regional geomagnetic instability over the past 30,000 years. Quaternary Science Reviews, 369, 109611, https://doi.org/10.1016/j.quascirev.2025.109611

Funding:

National Natural Science Foundation of China (NSFC), grant/award no. 42274090

National Natural Science Foundation of China (NSFC), grant/award no. 42330504

Coverage:

Latitude: 6.932135 * Longitude: 112.000200

Date/Time Start: 2014-05-18T00:00:00 * Date/Time End: 2014-05-18T00:00:00

Minimum Elevation: -2033.0 m * Maximum Elevation: -2033.0 m

Event(s):

BKAS58PC * Latitude: 6.932135 * Longitude: 112.000200 * Date/Time: 2014-05-18T00:00:00 * Elevation: -2033.0 m * Location: Southern South China Sea * Method/Device: Gravity corer (GC) * Comment: retrieved during HYDZ4 cruise in 2014

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	AGE	Age	ka BP	Wu, Shuang		Geocode
2	Inclination	Incl	deg	Wu, Shuang	Principal component analyses (PCA)
3	Declination	Decl	deg	Wu, Shuang	Principal component analyses (PCA)	corrected
4	Paleointensity, relative	J rel		Wu, Shuang	see abstract

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1111 data points

Data

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

1 Age [ka BP]	2 Incl [deg]	3 Decl [deg]	4 J rel
0.299	-0.5	1.2	0.085654869
1.020	-13.6	-9.4	0.060835793
1.703	-3.3	2.9	0.083806722
2.381	-2.7	1.3	0.119955250
2.775	12.2	-9.3	0.108532146
3.129	-4.8	-6.8	0.102026886
3.479	-6.3	-6.0	0.089400241
3.842	14.6	3.2	0.099436428
4.199	1.3	-11.6	0.064477638
4.525	2.0	7.1	0.095423848
4.849	10.3	8.6	0.100530283
5.167	7.5	4.6	0.076217756
5.476	7.1	2.9	0.102339666
5.797	-0.2	5.3	0.102818777
6.127	4.0	0.5	0.052124131
6.441	-1.7	3.3	0.086744744
6.682	-2.9	6.3	0.070188682
6.911	-5.1	6.0	0.069743370
7.141	-0.8	8.8	0.072142864
7.369	-4.1	1.8	0.058751182
7.591	1.3	-5.6	0.117481623
7.813	2.8	7.9	0.065128072
8.043	-6.4	-9.1	0.072479758
8.276	3.3	-7.3	0.053463836
8.509	-0.3	-9.1	0.059851656
8.738	-0.6	-13.0	0.065610756
8.948	-5.7	-11.6	0.079911438
9.158	-5.2	-4.2	0.110531034
9.368	12.7	-4.6	0.080616016
9.574	-9.3	-10.6	0.065536798
9.773	5.1	0.0	0.074989142
9.972	4.9	-11.3	0.109608950
10.179	2.7	-10.4	0.083526139
10.390	3.4	-13.2	0.077780073
10.602	3.3	-10.4	0.071852913
10.802	4.7	-9.4	0.093240363
10.943	-4.2	-10.0	0.091600718
11.073	-1.6	-17.9	0.094569580
11.203	3.5	-10.3	0.093279105
11.333	8.6	-1.9	0.095084668
11.842	12.4	-19.5
11.967	-7.7	4.9	0.017909332
12.094	-8.5	13.0	0.028266768
12.623	-15.5	10.3
12.755	-16.4	18.9
12.947	-21.0	-16.0	0.020382836
13.130	-20.0	-4.4	0.064547376
13.254	-26.0	4.6	0.022729445
13.315	-6.0	7.9	0.019986064
13.466	-17.0	2.2	0.018144094
13.526	-30.0	7.7	0.048741870
13.587	-33.0	-13.3	0.058162723
13.649	5.0	-7.5
13.712	-16.0	17.9	0.025791562
13.775	-24.0	-0.5	0.039560298
13.838	-2.0	3.6	0.076045133
13.902	-15.0	6.5	0.043084548
14.056	9.0	-89.3	0.015493175
14.174	-9.0	4.0	0.033699738
14.292	-10.0	-6.1	0.045379724
14.416	-4.0	-10.7	0.019191043
14.547	-11.0	-11.8	0.064535097
14.677	-10.0	-2.0	0.053430691
14.806	-5.0	-3.9	0.018272663
14.931	9.0	-19.4	0.040577401
15.051	12.0	-6.9	0.046535697
15.168	-6.0	-71.9	0.022025654
15.473	-7.7	-15.6	0.098720090
15.602	-14.8	-16.8	0.138556671
15.732	-4.0	-11.9	0.122062943
15.862	-11.1	-20.2	0.072796767
15.981	-10.8	-18.1	0.103324293
16.039	-11.4	-12.9	0.108250785
16.087	-4.9	-8.9	0.107577064
16.135	-6.3	-25.1
16.183	-7.1	-23.8	0.138623459
16.231	-17.6	-5.5	0.116236545
16.279	-14.3	-17.1	0.099586748
16.327	-14.1	-7.9	0.142707950
16.375	-13.8	-21.2	0.137431300
16.423	-11.9	-24.8	0.138123904
16.471	-11.2	-18.3	0.124924007
16.543	-10.3	-23.9	0.141675501
16.593	-13.5	-16.7	0.123760519
16.643	-14.8	-24.7	0.128942403
16.693	-14.7	-27.2	0.106449578
16.744	-11.3	-28.6	0.110686802
16.794	-19.4	-32.7	0.025095724
16.845	-16.2	-26.5	0.115118460
16.895	-10.4	-32.5	0.037964392
16.935	-8.9	-29.2	0.062004930
16.963	-10.3	-13.8	0.087584987
16.991	-6.1	-27.0	0.098594233
17.019	-7.6	-29.5	0.126084910
17.046	-10.3	-21.0	0.143457003
17.074	-9.2	-23.3	0.127528576
17.116	-10.2	-7.4	0.118783795
17.198	8.2	-2.3	0.029751153
17.252	13.5	-0.5	0.021359909
17.280	15.9	9.1	0.022444532
17.307	20.5	-1.6	0.039684927
17.334	20.4	2.4	0.028173045
17.360	7.8	-14.6	0.047134403
17.387	17.6	-5.4	0.062604498
17.414	13.5	0.5	0.070802864
17.440	23.7	-16.8	0.034113668
17.466	21.5	-22.1	0.054299996
17.493	14.7	-22.1	0.029901780
17.519	31.8	-16.8	0.052867865
17.545	11.8	-27.3	0.043604878
17.572	9.7	-2.3	0.043384403
17.598	12.7	-23.7	0.041970140
17.625	14.8	-47.0	0.021144756
17.652	-2.0	6.7	0.026821325
17.679	-3.2	9.3	0.086506343
17.707	15.5	8.2	0.036437590
17.734	5.1	-7.4	0.034403223
17.762	18.8	-10.0	0.043712123
17.789	-1.2	-11.9	0.022570401
17.817	7.9	-23.1	0.025684292
17.845	17.1	-2.1	0.022723567
17.873	13.0	10.7	0.020215267
17.901	12.9	11.0	0.036817578
17.929	-10.9	-5.3	0.012924227
17.957	2.4	3.8	0.030315224
17.985	19.8	-2.1	0.040155727
18.013	6.7	-6.3	0.049881840
18.041	8.8	-4.0	0.049226411
18.071	-8.5	-8.0	0.037957857
18.111	-1.9	4.2	0.044921914
18.193	-6.2	20.6	0.042176051
18.234	-17.2	-6.6	0.054250381
18.275	-11.6	-21.7	0.053425376
18.356	-14.3	-1.5
18.375	-2.9	2.2	0.071731652
18.414	-3.4	4.2	0.103703897
18.452	-1.3	5.3	0.071777006
18.490	-6.5	1.9	0.059835874
18.530	-12.1	-10.9	0.088997291
18.570	-7.8	2.5	0.070067073
18.611	10.9	3.0	0.073260729
18.652	5.9	3.5	0.061932467
18.693	-1.8	4.3	0.081810330
18.734	4.0	0.2	0.063556186
18.775	6.9	1.3	0.049043846
18.817	9.7	-2.3	0.097552870
18.860	7.2	-4.3	0.052994535
18.904	4.8	6.8	0.065907907
18.947	3.6	5.4	0.082674938
18.990	15.6	-15.8	0.082114990
19.033	-0.5	3.2	0.039541292
19.075	2.7	9.2	0.046801799
19.118	-0.4	16.9	0.064419648
19.161	8.1	10.7	0.043789207
19.182	-4.8	6.0
19.224	-0.4	18.4
19.265	6.0	14.4	0.049560158
19.306	8.0	18.2	0.040622146
19.346	3.7	13.4	0.033518785
19.387	-2.5	5.8	0.047349859
19.427	11.3	5.7	0.037986931
19.468	2.7	-7.2	0.048987377
19.510	-17.7	-6.0	0.022726783
19.553	-8.6	-0.1	0.024927658
19.596	-11.2	9.9	0.053666672
19.638	-15.9	9.4
19.682	-27.8	-38.3	0.011077495
19.725	-4.6	-8.8	0.057162754
19.768	-10.2	15.0
19.811	-18.9	33.2	0.025562933
19.855	4.6	17.4	0.066139604
19.897	-8.3	11.2	0.044448226
19.933	8.5	8.4	0.055571442
20.004	-7.5	3.1	0.061166303
20.040	-3.4	2.6	0.082564394
20.075	0.0	1.2	0.039614005
20.110	8.6	3.1	0.056595735
20.144	-11.0	8.2	0.066598145
20.178	4.1	14.4	0.080776661
20.211	1.9	12.3	0.082508469
20.246	-0.1	16.6	0.106834814
20.281	8.3	3.4	0.095515009
20.316	6.7	8.5	0.068655429
20.352	-3.4	6.5	0.044855238
20.388	12.0	4.8	0.130526286
20.423	8.2	10.3	0.080311223
20.459	7.6	11.6	0.070087718
20.491	6.6	10.7	0.085036011
20.523	6.7	5.7	0.097272403
20.555	3.9	5.7	0.098197390
20.587	3.5	0.7	0.078216921
20.619	3.5	7.4	0.091553674
20.651	3.2	-0.9	0.089489867
20.683	4.4	1.9	0.125371627
20.715	2.7	4.9	0.093448275
20.747	3.7	-1.0	0.109649451
20.779	5.9	-3.1	0.143717216
20.811	8.6	-3.3	0.067929597
20.843	10.9	-1.0	0.040671125
20.875	4.5	4.5	0.086009859
20.906	2.4	1.7	0.076607147
20.938	0.7	-0.1	0.046859326
20.970	14.1	-4.8	0.100779336
21.002	8.8	-4.5	0.108424954
21.034	8.0	-1.5	0.097187765
21.065	7.2	2.3	0.126289997
21.097	3.0	3.4	0.086914033
21.128	-2.6	2.5	0.060066386
21.160	-8.2	4.0	0.060810116
21.191	-1.4	4.9	0.041173760
21.223	-4.2	10.7	0.074254647
21.254	-13.7	12.5	0.077697002
21.286	-6.4	10.8	0.115351128
21.317	-3.6	4.4
21.379	11.8	8.7	0.063386848
21.410	7.7	3.1	0.040766000
21.472	-1.6	12.4	0.029819722
21.503	-0.9	8.6	0.027242919
21.533	6.2	-1.1	0.040478030
21.564	8.5	7.9	0.026490984
21.625	8.3	0.3	0.046046928
21.655	-4.0	10.5	0.019268375
21.685	8.9	1.5	0.013932792
21.715	-1.9	12.8	0.026114939
21.745	9.3	6.2	0.032467483
21.775	-11.6	-11.1	0.013128730
21.805	9.3	5.9	0.020270139
21.834	-7.3	12.6	0.038696366
21.924	5.6	-3.1	0.024446916
21.953	4.7	1.4	0.043204924
21.983	-3.5	3.1	0.039284109
22.013	-4.9	9.9	0.038196425
22.043	-5.8	19.1	0.030470844
22.073	-1.3	14.1	0.039593022
22.103	-11.4	6.1	0.029546284
22.133	-0.2	19.4	0.039437603
22.163	-6.8	8.3	0.030583254
22.193	-8.3	11.2	0.033065037
22.223	-7.8	-1.4	0.034319555
22.253	-13.3	-7.2	0.024770707
22.284	-6.5	-2.4	0.034216656
22.314	-2.0	-8.0	0.026850233
22.345	-13.9	-10.3	0.037881126
22.375	-10.3	-1.7	0.022896305
22.406	-5.0	-8.9	0.032651422
22.436	-3.0	-7.8	0.038323523
22.467	7.1	-8.5	0.034138734
22.497	3.1	-7.2	0.053329209
22.528	7.2	-1.3	0.034946372
22.559	23.6	-10.2	0.021255237
22.589	-1.1	-14.7	0.047285543
22.619	12.1	-2.7	0.037058695
22.650	7.8	-5.0	0.029523959
22.680	8.4	-2.3	0.022529614
22.710	18.8	-10.0	0.020317112
22.801	14.4	-6.9	0.051836678
22.831	30.4	-11.5	0.017348279
22.861	-1.5	-5.6	0.041760113
22.891	11.7	-5.9	0.045808524
22.920	-24.7	-1.7	0.081653025
22.950	10.8	-3.0	0.035844536
22.980	8.9	-6.0	0.045243356
23.009	6.8	-5.8	0.022421408
23.039	12.4	3.8	0.005227487
23.069	10.8	10.4	0.027262529
23.098	11.5	6.9	0.013851736
23.127	-0.3	-11.6	0.020309143
23.157	2.3	-7.4
23.201	9.3	-7.0	0.040199412
23.230	19.7	-6.4	0.089827549
23.260	12.1	-11.0	0.035638782
23.289	3.2	-9.5	0.012596380
23.318	18.7	0.6
23.368	4.8	3.6	0.019030582
23.438	3.9	3.3
23.508	2.8	4.4	0.022958184
23.578	17.5	1.8	0.021781506
23.648	11.0	3.0
23.718	11.0	1.9	0.046120479
23.788	6.7	-6.3	0.038685269
23.858	-5.6	1.2	0.010486988
23.928	-8.8	-0.6	0.024279047
23.998	10.1	4.8	0.015844816
24.068	1.8	1.6
24.139	3.1	-4.2	0.014031476
24.209	7.1	-0.1	0.047653105
24.280	-2.9	-2.4
24.386	-3.0	2.7	0.005122138
24.456	11.1	5.5	0.017184832
24.527	12.2	5.9	0.008864790
24.598	12.4	0.0	0.035316557
24.669	8.9	3.0	0.055634142
24.740	1.2	-2.6	0.025401625
24.810	-14.3	0.2	0.011697395
24.881	20.5	3.0	0.017769063
24.952	3.6	-6.9	0.021259728
25.023	10.6	15.5	0.049489790
25.094	6.4	-3.4	0.047577740
25.165	7.1	0.8	0.034649786
25.235	-11.8	-7.2	0.047206590
25.305	11.6	-1.8
25.376	6.5	1.3	0.084255262
25.446	-4.5	5.7	0.032200752
25.515	21.3	6.0	0.037281148
25.584	2.4	13.2	0.020941988
25.653	9.5	7.2	0.014000030
25.722	15.7	3.1	0.011701757
25.790	9.0	-0.7	0.039089657
25.857	1.8	4.8	0.050323579
25.924	4.4	5.7	0.081969821
25.991	17.1	0.2	0.040866118
26.122	14.0	8.0	0.026715164
26.187	6.6	4.7	0.030546176
26.252	12.5	-2.5	0.010894779
26.316	8.5	7.5	0.032184260
26.380	9.0	13.3	0.022902175
26.443	7.4	6.9	0.018720309
26.507	12.5	4.1	0.046988988
26.570	14.7	-2.0	0.096188295
26.633	2.5	-3.1	0.097497038
26.697	2.7	3.2	0.055721967
26.760	10.6	8.2	0.055372632
26.824	3.3	0.4	0.079920672
26.888	11.0	-5.9	0.096379570
26.953	11.4	0.3	0.076575471
27.018	13.5	-6.6	0.054221294
27.084	-3.0	-17.0	0.080739501
27.150	5.4	10.1	0.080469235
27.217	6.3	-18.9	0.022967336
27.353	-1.3	-8.7	0.015640288
27.490	0.7	-31.8	0.008211555
27.700	-22.6	-15.6
27.771	-18.0	-2.5	0.021700559
27.914	-17.3	-19.2	0.032298008
27.985	-18.7	-22.6	0.010890726
28.057	-19.4	-26.7	0.017210416
28.129	-4.6	-33.3	0.017613625
28.202	-7.0	-34.3	0.015124337
28.274	-19.0	-17.4	0.012227266
28.419	-8.6	-37.9	0.023394654
28.491	-1.6	1.5	0.018026492
28.564	-26.9	-33.8	0.038627549
28.709	-14.1	-0.8	0.030236103
28.782	-5.6	-16.3	0.025297747
28.855	-2.2	-5.8	0.049896833
28.927	-6.4	-8.3	0.026508841
29.000	4.6	1.8	0.035399456
29.073	5.3	-9.1	0.026825982
29.146	11.3	-19.9	0.026505093
29.219	-9.4	-21.5	0.027711844
29.364	6.0	-2.8
29.400	3.4	19.2	0.070701169
29.473	12.8	18.0	0.089486259
29.546	3.6	14.7	0.121857471
29.619	-5.0	2.5	0.115772198
29.692	-22.6	-1.3	0.089545438
29.764	-3.1	-7.1	0.044709401
29.837	-11.1	-3.5	0.109248037
29.903	-36.3	-3.3	0.049615878
29.969	-26.6	-7.9	0.040531378
30.035	-40.7	-10.1	0.030341344
30.101	-38.8	-11.1	0.043916401
30.167	-30.5	12.5	0.088276259
30.233	-33.3	0.0	0.056141262
30.266	-28.8	2.6	0.048229627
30.332	-25.7	18.3	0.042094211
30.398	-31.6	15.5	0.042750317
30.464	-56.1	52.0	0.059545029
30.530	-25.2	-3.3	0.042251621
30.596	-30.2	10.9	0.052996745
30.662	-24.0	7.0	0.038972599
30.728	-3.1	60.8	0.048509249
30.794	-2.8	-22.1	0.052483926
30.860	-17.5	-27.5	0.054368036
30.926	16.0	-21.3	0.064683571
30.826	29.4	-19.5	0.049725444
30.859	12.5	-27.9	0.039608536