Citation:

PANGAEA.926798

Name: Age versus two relative paleointensity proxies (slopes of NRM/ARM and NRM/IRM) for u-channel samples from Core MD07-3076 recovered during Marion Dufresne cruise VT90/SOUC
Published: 2021-01-20
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Iceland Basin magnetic excursion; Laschamp magnetic excursion; Quaternary; South Atlantic

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Abstract:

Two relative paleointensity (RPI) proxies (slopes of NRM/ARM and NRM/IRM) for u-channel samples from Core MD07-3076. The RPI proxies were determined from stepwise alternating field demagnetization applied to the natural remanent magnetization (NRM) and to the anhysteretic remanent magnetization (ARM) (see Channell et al., 2017). Age models for records of the Laschamp and Iceland Basin excursions were derived from radiocarbon dates, and from matching sea-surface temperature records to Antarctic (EPICA) air-temperature records from ice cores. The onset of the Laschamp excursion occurred during Antarctic Isotopic Maximum (AIM) 10, consistent with its occurrence during Greenland Interstadial 10. The end of the Laschamp excursion occurred prior to AIM 9 in Greenland Stadial 10. The age model is supported by synchroneity of directional and relative paleointensity manifestations of the Laschamp excursion in the marine core with peaks in EPICA10Be and nitrate flux. The Iceland Basin excursion is synchronous with the final phase of the transition from marine isotope stage (MIS) 7a to MIS 6e as recorded in the EPICA δD record. The onset of the Laschamp and Iceland Basin excursions, defined here by component inclinations >-40°, occurred at 41.4 ka and 190.0 ka, and durations are ~1 kyr and ~ 3.5 kyr, respectively, although these estimates depend on the criteria used to define the directional excursions. By comparison with Laschamp and Iceland Basin excursion records from the North Atlantic Ocean, the two excursions are synchronous at centennial timescales between the two hemispheres, based on synchronization of the GICC05 and AICC2012 age models for Greenland and Antarctic ice cores.

Keyword(s):

Iceland Basin magnetic excursion; Laschamp magnetic excursion; Quaternary; South Atlantic

Related to:

Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2017): Age and duration of Laschamp and Iceland Basin geomagnetic excursions in the South Atlantic Ocean. Quaternary Science Reviews, 167, 1-13, https://doi.org/10.1016/j.quascirev.2017.04.020

Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of discrete samples recording the Iceland Basin excursion in Core MD07-3077 recovered during Marion Dufresne cruise VT90/SOUC. PANGAEA, https://doi.org/10.1594/PANGAEA.926787

Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of discrete samples recording the Laschamp excursion in Core MD07-3076 recovered during Marion Dufresne cruise VT90/SOUC. PANGAEA, https://doi.org/10.1594/PANGAEA.926797

Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of u-channel samples recording the Iceland Basin excursion in Core MD07-3077 recovered during Marion Dufresne cruise VT90/SOUC. PANGAEA, https://doi.org/10.1594/PANGAEA.926795

Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of u-channel samples recording the Laschamp excursion in Core MD07-3076 recovered during Marion Dufresne cruise VT90/SOUC. PANGAEA, https://doi.org/10.1594/PANGAEA.926796

Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus two relative paleointensity proxies (slopes of NRM/ARM and NRM/IRM) for u-channel samples from Core MD07-3077 recovered during Marion Dufresne cruise VT90/SOUC. PANGAEA, https://doi.org/10.1594/PANGAEA.926799

Coverage:

Latitude: -44.153330 * Longitude: -14.228170

Minimum Elevation: -3770.0 m * Maximum Elevation: -3770.0 m

Event(s):

MD07-3076 (MD07-3076Q) * Latitude: -44.153330 * Longitude: -14.228170 * Elevation: -3770.0 m * Campaign: (IMAGES XV - Pachiderme) * Basis: * Method/Device: Calypso Square Core System (CASQS)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	AGE	Age	ka BP	Channell, James E T	see description in data abstract	Geocode
2	Natural remanent magnetization/anhysteretic remanent magnetization ratio	NRM/ARM		Channell, James E T	see Channell et al. (2017)	Slope
3	Natural remanent magnetization/isothermal remanent magnetization ratio	NRM/IRM		Channell, James E T	see Channell et al. (2017)	Slope

License:

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

Size:

1558 data points

Data

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

1 Age [ka BP]	2 NRM/ARM	3 NRM/IRM
1.47	0.06874	0.00304
1.57	0.07836	0.00346
1.70	0.08521	0.00376
1.86	0.09145	0.00401
2.01	0.09757	0.00426
2.16	0.10400	0.00450
2.33	0.11099	0.00477
2.50	0.11782	0.00503
2.68	0.12508	0.00532
2.86	0.13205	0.00563
3.03	0.13898	0.00594
3.21	0.14620	0.00626
3.42	0.15405	0.00660
3.66	0.16387	0.00699
3.90	0.17712	0.00748
4.14	0.19399	0.00805
4.37	0.21351	0.00864
4.61	0.23025	0.00905
4.85	0.24172	0.00913
5.08	0.24602	0.00874
5.31	0.24149	0.00774
5.54	0.23658	0.00654
5.73	0.23969	0.00554
5.88	0.26065	0.00491
6.03	0.28876	0.00453
6.17	0.32098	0.00440
6.32	0.35232	0.00445
6.47	0.37695	0.00456
6.60	0.39143	0.00464
6.72	0.39799	0.00469
6.84	0.39820	0.00472
6.96	0.39511	0.00472
7.14	0.38711	0.00467
7.38	0.37574	0.00457
7.62	0.36261	0.00443
7.86	0.35009	0.00431
8.10	0.34265	0.00430
8.34	0.34145	0.00450
8.57	0.34578	0.00495
8.79	0.34815	0.00562
9.02	0.35519	0.00650
9.24	0.35187	0.00742
9.43	0.35137	0.00832
9.60	0.34821	0.00904
9.76	0.34433	0.00952
9.92	0.34464	0.00986
10.07	0.34242	0.00992
10.22	0.34126	0.00976
10.36	0.34237	0.00949
10.50	0.34595	0.00931
10.64	0.35039	0.00930
10.78	0.35149	0.00940
10.90	0.34864	0.00950
11.01	0.34276	0.00955
11.12	0.33671	0.00963
11.22	0.33178	0.00974
11.34	0.32910	0.00985
11.47	0.32664	0.00986
11.61	0.32362	0.00975
11.77	0.32112	0.00955
11.93	0.31697	0.00930
12.10	0.31049	0.00908
12.28	0.30171	0.00893
12.45	0.29256	0.00882
13.18	0.24412	0.00788
13.27	0.24453	0.00784
13.36	0.23925	0.00768
13.47	0.23033	0.00739
13.58	0.22065	0.00711
13.70	0.20996	0.00680
13.82	0.20194	0.00656
13.94	0.19558	0.00637
14.06	0.19083	0.00619
14.18	0.18651	0.00602
14.30	0.18266	0.00583
14.40	0.17966	0.00567
14.48	0.17747	0.00554
14.55	0.17619	0.00544
14.63	0.17460	0.00535
14.70	0.17278	0.00525
14.76	0.17133	0.00519
14.81	0.17232	0.00519
14.85	0.17666	0.00532
14.88	0.18343	0.00552
14.92	0.18977	0.00570
14.97	0.19278	0.00578
15.04	0.19432	0.00581
15.11	0.19625	0.00583
15.17	0.19964	0.00587
15.27	0.20596	0.00593
15.41	0.21542	0.00602
15.55	0.22690	0.00609
15.69	0.24226	0.00617
15.83	0.25650	0.00618
15.97	0.26804	0.00618
16.11	0.27153	0.00618
16.24	0.26996	0.00622
16.38	0.27147	0.00636
16.52	0.27716	0.00661
16.66	0.28877	0.00691
16.79	0.30106	0.00722
16.92	0.30832	0.00738
17.05	0.31203	0.00741
17.17	0.31299	0.00737
17.29	0.31452	0.00732
17.40	0.31710	0.00729
17.52	0.32051	0.00728
17.63	0.32552	0.00732
17.75	0.33447	0.00744
17.85	0.34712	0.00764
17.96	0.36141	0.00788
18.05	0.37420	0.00807
18.15	0.38562	0.00821
18.24	0.39249	0.00827
18.33	0.39653	0.00824
18.42	0.39513	0.00810
18.51	0.39149	0.00789
18.59	0.38814	0.00768
18.67	0.38717	0.00752
18.75	0.39245	0.00746
18.84	0.39909	0.00742
18.92	0.40791	0.00740
19.00	0.41548	0.00736
19.09	0.42476	0.00731
19.18	0.43595	0.00729
19.27	0.45212	0.00734
19.36	0.47620	0.00750
19.47	0.50094	0.00767
19.61	0.52040	0.00776
19.75	0.52745	0.00769
19.89	0.52655	0.00750
20.03	0.51774	0.00724
20.17	0.50931	0.00698
20.30	0.50379	0.00678
20.44	0.50157	0.00663
20.59	0.50586	0.00658
20.73	0.51552	0.00662
20.88	0.53066	0.00674
21.03	0.54476	0.00687
21.18	0.55660	0.00697
21.33	0.56452	0.00703
21.47	0.57216	0.00709
21.62	0.58070	0.00715
21.77	0.58651	0.00718
21.92	0.58811	0.00716
22.07	0.58491	0.00708
22.22	0.57991	0.00699
22.36	0.57183	0.00684
22.51	0.55867	0.00665
22.66	0.54035	0.00638
22.81	0.52100	0.00611
22.96	0.50609	0.00589
23.11	0.49962	0.00578
23.27	0.50319	0.00578
23.42	0.51474	0.00589
23.58	0.52804	0.00602
23.73	0.53814	0.00611
23.89	0.53974	0.00611
24.05	0.53421	0.00603
24.20	0.52859	0.00596
24.36	0.52962	0.00596
24.51	0.53684	0.00604
24.67	0.54387	0.00609
24.80	0.54245	0.00606
24.90	0.53436	0.00594
25.01	0.51810	0.00574
25.12	0.50058	0.00553
25.22	0.48572	0.00535
25.33	0.47286	0.00519
25.44	0.46244	0.00506
25.54	0.45247	0.00493
25.65	0.44223	0.00479
25.76	0.43392	0.00468
25.86	0.43059	0.00461
25.97	0.43383	0.00462
26.07	0.44367	0.00469
26.18	0.45691	0.00480
26.29	0.47092	0.00492
26.41	0.48346	0.00503
26.52	0.49023	0.00509
26.64	0.49113	0.00508
26.75	0.48399	0.00501
26.86	0.47246	0.00488
26.98	0.46226	0.00478
27.09	0.45519	0.00470
27.21	0.45081	0.00465
27.32	0.44428	0.00458
27.42	0.44016	0.00454
27.50	0.43536	0.00450
27.57	0.43411	0.00449
27.65	0.43267	0.00449
27.73	0.43314	0.00451
27.81	0.43632	0.00455
27.89	0.44118	0.00461
27.96	0.44555	0.00467
28.04	0.44443	0.00467
28.12	0.43541	0.00459
28.20	0.42113	0.00447
28.27	0.40708	0.00434
28.35	0.39744	0.00426
28.43	0.39379	0.00424
28.51	0.39437	0.00427
28.59	0.39767	0.00431
28.66	0.40477	0.00441
28.74	0.41258	0.00452
28.82	0.41788	0.00459
28.90	0.41701	0.00463
29.52	0.26031	0.00303
29.60	0.25148	0.00292
29.67	0.24433	0.00284
29.75	0.24152	0.00279
29.83	0.24184	0.00278
29.91	0.24333	0.00279
29.98	0.24686	0.00282
30.06	0.25137	0.00287
30.13	0.25117	0.00287
30.19	0.24408	0.00279
30.26	0.23784	0.00271
30.32	0.23994	0.00274
30.39	0.24857	0.00284
30.46	0.25525	0.00292
30.52	0.25625	0.00293
30.59	0.25569	0.00291
30.65	0.25824	0.00293
30.72	0.26662	0.00302
30.78	0.27615	0.00313
30.85	0.28321	0.00321
30.92	0.28669	0.00325
30.98	0.28999	0.00329
31.05	0.29528	0.00335
31.11	0.30500	0.00346
31.18	0.32049	0.00364
31.24	0.34016	0.00385
31.31	0.36811	0.00416
31.37	0.39678	0.00447
31.44	0.42493	0.00476
31.51	0.44970	0.00502
31.57	0.47115	0.00525
31.64	0.49009	0.00545
31.70	0.50317	0.00561
31.77	0.51328	0.00574
31.83	0.52581	0.00591
31.90	0.54534	0.00619
31.96	0.57472	0.00660
32.03	0.60794	0.00705
32.10	0.63576	0.00744
32.16	0.64751	0.00767
32.23	0.64609	0.00773
32.29	0.64323	0.00777
32.36	0.64835	0.00787
32.42	0.66346	0.00804
32.49	0.67756	0.00821
32.56	0.68146	0.00826
32.62	0.67435	0.00818
32.69	0.66318	0.00805
32.75	0.65216	0.00791
32.82	0.63974	0.00775
32.88	0.62671	0.00758
32.95	0.61439	0.00740
33.01	0.60521	0.00726
33.08	0.60171	0.00716
33.15	0.60050	0.00710
33.21	0.59862	0.00704
33.28	0.59558	0.00698
33.34	0.59449	0.00695
33.41	0.59515	0.00695
33.47	0.59906	0.00697
33.54	0.60467	0.00702
33.60	0.60818	0.00704
33.67	0.60862	0.00702
33.74	0.60193	0.00692
33.80	0.58331	0.00670
33.87	0.54923	0.00631
33.93	0.50579	0.00583
34.00	0.45944	0.00531
34.06	0.42185	0.00488
34.13	0.39330	0.00456
34.19	0.37007	0.00429
34.24	0.34244	0.00396
34.29	0.30584	0.00353
34.34	0.26567	0.00307
34.39	0.22648	0.00263
34.44	0.20691	0.00241
34.48	0.20795	0.00245
34.53	0.22927	0.00272
34.58	0.26287	0.00315
34.63	0.29808	0.00360
34.68	0.32754	0.00398
34.73	0.35037	0.00429
34.78	0.36621	0.00451
34.82	0.38143	0.00472
34.87	0.39457	0.00491
34.92	0.40222	0.00502
34.97	0.40186	0.00502
35.02	0.39553	0.00495
35.07	0.38723	0.00486
35.12	0.38063	0.00480
35.16	0.37868	0.00478
35.21	0.38247	0.00484
35.26	0.38965	0.00493
35.31	0.39506	0.00500
35.36	0.39485	0.00500
35.41	0.38914	0.00494
35.46	0.38350	0.00488
35.50	0.38154	0.00486
35.55	0.38414	0.00488
35.60	0.38871	0.00494
35.65	0.39040	0.00494
35.70	0.38751	0.00486
35.75	0.37822	0.00470
35.80	0.36703	0.00451
35.84	0.35636	0.00433
35.89	0.35031	0.00420
35.94	0.34819	0.00414
35.99	0.34715	0.00409
36.04	0.34470	0.00403
36.09	0.33988	0.00396
36.16	0.33172	0.00388
36.24	0.32122	0.00377
36.31	0.30887	0.00366
36.38	0.29812	0.00357
36.45	0.28834	0.00351
36.52	0.27990	0.00345
36.59	0.27505	0.00343
36.66	0.27182	0.00343
36.73	0.27135	0.00345
36.80	0.27298	0.00348
36.87	0.27682	0.00355
36.94	0.28031	0.00361
37.01	0.28255	0.00368
37.08	0.28295	0.00373
37.16	0.28072	0.00373
37.23	0.27653	0.00370
37.30	0.27206	0.00365
37.37	0.26991	0.00363
37.44	0.27193	0.00365
37.51	0.27564	0.00370
37.58	0.27747	0.00372
37.65	0.27578	0.00369
37.72	0.27364	0.00365
37.79	0.27544	0.00366
37.86	0.28189	0.00373
37.93	0.29148	0.00385
38.00	0.29783	0.00392
38.08	0.29783	0.00392
38.15	0.29189	0.00384
38.22	0.28467	0.00374
38.29	0.27784	0.00364
38.36	0.27350	0.00358
38.43	0.27087	0.00353
39.00	0.22203	0.00282
39.07	0.22250	0.00283
39.14	0.21862	0.00279
39.21	0.21138	0.00271
39.28	0.20503	0.00264
39.35	0.20147	0.00260
39.41	0.20227	0.00261
39.46	0.20587	0.00265
39.50	0.21057	0.00269
39.55	0.21294	0.00271
39.60	0.21258	0.00269
39.64	0.20867	0.00263
39.69	0.20314	0.00254
39.74	0.20008	0.00247
39.78	0.20258	0.00248
39.83	0.21266	0.00258
39.88	0.22778	0.00274
39.93	0.25005	0.00299
39.97	0.27488	0.00327
40.02	0.29929	0.00354
40.07	0.31778	0.00375
40.11	0.32985	0.00389
40.16	0.33218	0.00392
40.21	0.32437	0.00382
40.25	0.30645	0.00360
40.30	0.28361	0.00332
40.35	0.25705	0.00300
40.40	0.23245	0.00270
40.44	0.20848	0.00242
40.49	0.18445	0.00214
40.54	0.15730	0.00183
40.58	0.12772	0.00149
40.63	0.09934	0.00116
40.68	0.07319	0.00086
40.73	0.05517	0.00065
40.77	0.04999	0.00059
40.82	0.05858	0.00069
40.87	0.07346	0.00087
40.91	0.08768	0.00104
40.96	0.10104	0.00121
41.01	0.11585	0.00139
41.05	0.13108	0.00157
41.10	0.14227	0.00170
41.15	0.14605	0.00174
41.20	0.14460	0.00173
41.24	0.14328	0.00171
41.29	0.14522	0.00174
41.34	0.14843	0.00178
41.38	0.14803	0.00177
41.43	0.14241	0.00170
41.48	0.13372	0.00158
41.53	0.12421	0.00147
41.57	0.11526	0.00136
41.62	0.10807	0.00127
41.67	0.10378	0.00122
41.72	0.10341	0.00121
41.79	0.10630	0.00125
41.85	0.10995	0.00129
41.92	0.11289	0.00133
41.98	0.11571	0.00136
42.04	0.12045	0.00142
42.11	0.12747	0.00151
42.17	0.13578	0.00160
42.23	0.14520	0.00172
42.30	0.15744	0.00187
42.36	0.17244	0.00206
42.42	0.18597	0.00222
42.49	0.19434	0.00233
42.55	0.19614	0.00237
42.61	0.19282	0.00235
42.68	0.18734	0.00230
42.74	0.18402	0.00228
42.80	0.18759	0.00233
42.87	0.19721	0.00246
42.93	0.21043	0.00263
42.99	0.22499	0.00281
43.06	0.24035	0.00299
43.12	0.25463	0.00316
43.18	0.26677	0.00330
43.25	0.27517	0.00339
43.31	0.28058	0.00345
43.37	0.28517	0.00349
43.44	0.28972	0.00353
43.50	0.29557	0.00359
43.57	0.29923	0.00362
43.63	0.29975	0.00361
43.70	0.29785	0.00359
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