Citation:

j.sedgeo.2005.07.009

Name: Strontium, Rubidium and Neodymium isotopic composition of sediments of western Pacific marginal basins (Table 1)
Creator: J Brian Mahoney
Published: 2005
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The Nd–Sr isotopic signature of fine-grained clastic strata from western Pacific marginal basins has been examined to test the applicability of isotopic fluctuations in basin characterization, stratigraphic correlation, and provenance determinations. Neodymium and strontium isotopic analyses were conducted on Plio–Pleistocene sediments (n = 70) from DSDP/ODP drill cores in the Sea of Japan, Shikoku Basin, and the Sulu Sea. The isotopic values from these basins demonstrate the utility of Nd–Sr isotopic signatures for both interbasinal characterization and provenance evaluation, and intrabasinal stratigraphic correlations. The isotopic signature of the Sulu Sea and the Sea of Japan fluctuates within predictable limits defined by the geology of the source area, and the signature is sensitive to changes in sediment flux from isotopically homogeneous source regions. Isotopic values in the Shikoku Basin deviate strongly from predicted isotopic values with neodymium values significantly lower than expected (epsilon-Nd (-7) to (-9) vs. predicted epsilon-Nd (-2) to (+5)). This isotopically evolved signature could not have been derived from the crustal domains on the basin margins, and requires input from a previously unrecognized source. The isotopic signature of the Shikoku Basin is interpreted to represent aeolian sediment flux into the basin from eastern Eurasia coincident with paleoclimatic change in Late Pliocene to Early Pliestocene time.

Stratigraphic isotopic fluctuations within the Shikoku Basin are sharp, spanning five epsilon-Nd units, and roughly synchronous across the topographically complex basin floor. Fluctuations in the isotopic signature are used to correlate drill holes across over 5400 km**2 of basin floor. The isotopic signature of fine-grained sediments reflects the average isotopic composition of the entire source region, and stratigraphic fluctuations in the isotopic signature record variations in the relative importance of isotopically distinct crustal domains through time. Isotopic variations are synchronous across the Shikoku Basin, and are interpreted to reflect episodic basin margin volcanism superimposed on a background of hemipelagic sedimentation with a strong eolian component. Fluctuations in the isotopic signature of basinal strata ultimately result from geologic events on the basin margins and paleoclimatic influences, and may therefore be useful in reconstruction of basin evolution.

Project(s):

Deep Sea Drilling Project (DSDP)

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: 27.981458 * Median Longitude: 132.667158 * South-bound Latitude: 8.000000 * West-bound Longitude: 120.679700 * North-bound Latitude: 43.987000 * East-bound Longitude: 138.967000

Date/Time Start: 1973-07-15T00:00:00 * Date/Time End: 1989-08-04T17:00:00

Minimum DEPTH, sediment/rock: 31.23 m * Maximum DEPTH, sediment/rock: 249.95 m

Event(s):

31-297 * Latitude: 30.872700 * Longitude: 134.164800 * Date/Time: 1973-07-15T00:00:00 * Elevation: -4458.0 m * Penetration: 679.5 m * Recovery: 125 m * Location: North Pacific/Philippine Sea/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 26 cores; 241.5 m cored; 1 m drilled; 51.8 % recovery

31-301 * Latitude: 41.062500 * Longitude: 134.047700 * Date/Time: 1973-07-30T00:00:00 * Elevation: -3520.0 m * Penetration: 497 m * Recovery: 49.9 m * Location: North Pacific/Japan Sea/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 161.5 m cored; 22 m drilled; 30.9 % recovery

58-442A * Latitude: 28.983300 * Longitude: 136.057200 * Date/Time: 1977-12-12T00:00:00 * Elevation: -4639.0 m * Penetration: 313.5 m * Recovery: 153.7 m * Location: North Pacific/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 304 m cored; 9.5 m drilled; 50.6 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Sample code/label	Sample label		Mahoney, J Brian	DSDP/ODP/IODP sample designation
3	DEPTH, sediment/rock	Depth sed	m			Geocode
4	AGE	Age	ka BP			Geocode
5	Strontium-87/Strontium-86 ratio	87Sr/86Sr		Mahoney, J Brian		measured
6	Strontium-87/Strontium-86 ratio, error	87Sr/86Sr e	±	Mahoney, J Brian
7	Strontium	Sr	mg/kg	Mahoney, J Brian
8	Rubidium	Rb	mg/kg	Mahoney, J Brian
9	Rubidium-87/Strontium-86 ratio	87Rb/86Sr		Mahoney, J Brian
10	Strontium-87/Strontium-86 ratio	87Sr/86Sr		Mahoney, J Brian		interpolated
11	Samarium	Sm	mg/kg	Mahoney, J Brian
12	Neodymium	Nd	mg/kg	Mahoney, J Brian
13	Samarium-147/Neodymium-144 ratio	147Sm/144Nd		Mahoney, J Brian
14	Neodymium-143/Neodymium-144 ratio	143Nd/144Nd		Mahoney, J Brian
15	Neodymium-143/Neodymium-144 ratio, error	143Nd/144Nd e	±	Mahoney, J Brian
16	Ratio	Ratio		Mahoney, J Brian		f(Sm/Nd) = (147Sm/144Nd)sample/(147Sm/144Nd CHUR -1)
17	ε-Neodymium (0)	ε-Nd(0)		Mahoney, J Brian
18	ε-Neodymium	ε-Nd		Mahoney, J Brian		interpolated

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

961 data points

Data

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

1 Event	2 Sample label	3 Depth sed [m]	4 Age [ka BP]	5 87Sr/86Sr (measured)	6 87Sr/86Sr e [±]	7 Sr [mg/kg]	8 Rb [mg/kg]	9 87Rb/86Sr	10 87Sr/86Sr (interpolated)	11 Sm [mg/kg]	12 Nd [mg/kg]	13 147Sm/144Nd	14 143Nd/144Nd	15 143Nd/144Nd e [±]	16 Ratio (f(Sm/Nd) = (147Sm/144Nd)sampl...)	17 ε-Nd(0)	18 ε-Nd (interpolated)
58-442A	58-442A-12-5	112.53	1300	0.71277	0.00003	118	115	2.80	0.71272	5	25	0.122	0.512277	0.000005	-0.381	-7.0	-7.0
58-442A	58-442A-13-2	119.00	1500	0.71340	0.00003	123	105	2.47	0.71335	6	28	0.120	0.512251	0.000006	-0.389	-7.6	-7.5
58-442A	58-442A-14-3	129.96	1900	0.71346	0.00011	126	62	2.57	0.71340	7	30	0.138	0.512262	0.000007	-0.297	-7.3	-7.3
58-442A	58-442A-15-2	137.40	2100	0.71293	0.00010	128	104	2.36	0.71286	6	27	0.127	0.512268	0.000009	-0.356	-7.2	-7.2
58-442A	58-442A-16-2	146.89	2400	0.71572	0.00003	116	123	3.07	0.71562	6	30	0.124	0.512212	0.000012	-0.369	-8.3	-8.3
58-442A	58-442A-18-1	164.58	3000	0.71305	0.00005	124	113	2.65	0.71294	6	29	0.123	0.512284	0.000008	-0.376	-6.9	-6.9
58-442A	58-442A-18-3	167.50	3100	0.71022	0.00018	140	99	2.06	0.71013	6	29	0.135	0.512371	0.000007	-0.316	-5.2	-5.2
58-442A	58-442A-19-2	175.60	3300	0.71379	0.00003	128	122	2.77	0.71366	7	33	0.133	0.512240	0.000006	-0.322	-7.8	-7.7
58-443	58-443-11-2	95.38	1400	0.71125	0.00005	254	117	1.33	0.71122	5	24	0.134	0.512240	0.000008	-0.318	-7.8	-7.8
58-443	58-443-11-6	100.20	1500	0.71439	0.00009	120	132	3.17	0.71432	6	29	0.128	0.512216	0.000004	-0.378	-8.2	-8.2
58-443	58-443-12-2	104.10	1500	0.71201	0.00003	166	115	2.00	0.71197	5	24	0.124	0.512207	0.000013	-0.371	-8.4	-8.4
58-443	58-443-14-2	123.84	1900	0.71249	0.00004	161	120	2.16	0.71243	5	25	0.125	0.512346	0.000016	-0.365	-5.7	-5.7
58-443	58-443-14-4	126.54	2000	0.71123	0.00004	121	119	2.84	0.71114	6	26	0.133	0.512324	0.000009	-0.324	-6.1	-6.1
58-443	58-443-15-2	133.19	2300	0.71381	0.00005	124	127	2.97	0.71371	6	29	0.121	0.512245	0.000009	-0.386	-7.7	-7.6
58-443	58-443-15-4	135.88	2500	0.71508	0.00004	128	127	2.86	0.71498	6	30	0.125	0.512644	0.000008	-0.397	-9.0	-9.0
58-443	58-443-15-6	139.02	2600	0.71383	0.00006	125	127	2.95	0.71372	6	29	0.120	0.512238	0.000007	-0.391	-7.8	-7.8
58-443	58-443-16-2	143.80	2800	0.71324	0.00004	138	122	2.54	0.71314	6	28	0.128	0.512327	0.000023	-0.348	-6.1	-6.0
58-443	58-443-17-1	151.85	3200	0.71274	0.00003	139	157	3.28	0.71259	5	27	0.120	0.512248	0.000009	-0.388	-7.6	-7.6
58-443	58-443-18-1	161.85	3600	0.71196	0.00004	133	116	2.54	0.71182	6	29	0.131	0.512290	0.000005	-0.336	-6.8	-6.8
58-444	58-444-4-5	31.23	500	0.70975	0.00002	183	69	1.09	0.70974	5	20	0.139	0.512452	0.000005	-0.292	-3.6	-3.6
58-444	58-444-5-1	37.00	700	0.71244	0.00004	146	117	2.31	0.71241	6	29	0.128	0.512286	0.000007	-0.349	-6.9	-6.9
58-444	58-444-5-4	41.60	900	0.71258	0.00002	149	120	2.33	0.71255	6	28	0.119	0.512281	0.000008	-0.395	-7.0	-7.0
58-444	58-444-6-1	48.92	1200	0.71114	0.00003	210	111	1.53	0.71111	5	26	0.122	0.512299	0.000006	-0.382	-6.6	-6.6
58-444	58-444-7-1	54.74	1800	0.71215	0.00005	148	112	2.18	0.71210	6	30	0.126	0.512196	0.000010	-0.362	-8.6	-8.6
58-444	58-444-7-3	57.32	2000	0.71056	0.00004	145	107	2.14	0.71050	6	27	0.123	0.512344	0.000025	-0.376	-5.7	-5.7
58-444	58-444-7-6	61.23	2300	0.71090	0.00003	152	104	1.97	0.71084	6	29	0.129	0.512254	0.000009	-0.344	-7.5	-7.5
58-444	58-444-8-1	65.88	2800	0.70769	0.00002	220	73	0.96	0.70765	5	22	0.143	0.512523	0.000015	-0.273	-2.2	-2.2
58-444	58-444-9-1	77.15	3800	0.70938	0.00003	165	100	1.75	0.70929	5	29	0.125	0.512345	0.000010	-0.366	-5.7	-5.7
58-444A	58-444A-1-1	82.75	4300	0.71140	0.00002	141	106	2.17	0.71127	6	28	0.127	0.512294	0.000012	-0.355	-6.7	-6.7
31-297	31-297-6-5	83.49	900	0.71212	0.00003	141	117	2.41	0.71184	5	27	0.118	0.512236	0.000013	-0.402	-7.8	-7.8
31-297	31-297-7-3	100.10	1000	0.71397	0.00003	144	128	2.57	0.71393	6	28	0.125	0.512239	0.000002	-0.366	-7.8	-7.8
31-297	31-297-8-4	110.10	1100	0.71354	0.00004	140	124	2.55	0.71350	5	27	0.121	0.512251	0.000006	-0.383	-7.6	-7.5
31-297	31-297-9-2	127.10	1300	0.71456	0.00005	117	134	3.30	0.71450	5	28	0.117	0.512233	0.000006	-0.407	-7.9	-7.9
31-297	31-297-10-2	154.70	1600	0.71280	0.00003	120	115	2.77	0.71274	5	27	0.117	0.512276	0.000007	-0.405	-7.1	-7.1
31-297	31-297-11-2	203.39	2100	0.71298	0.00003	125	118	2.73	0.71290	5	25	0.120	0.512276		-0.390	-7.1	-7.0
31-297	31-297-11-4	206.33	2100	0.71169	0.00003	177	63	1.84	0.71164	6	26	0.135	0.512263	0.000006	-0.314	-7.3	-7.3
31-297	31-297-12-2	249.95	2500	0.71277	0.00003	120	123	2.95	0.71266	6	27	0.122	0.512249	0.000008	-0.377	-7.6	-7.6
31-301	31-301-4-5	161.28	1400	0.71123	0.00003	121	130	3.11	0.71117	6	30	0.123	0.512385	0.000005	-0.375	-4.9	-4.9
31-301	31-301-5-6	182.20	1600	0.71351	0.00003	129	135	3.03	0.71344	6	31	0.119	0.512303	0.000005	-0.394	-6.5	-6.5
31-301	31-301-7-1	213.45	2000	0.71384	0.00003	121	135	3.22	0.71375	6	30	0.118	0.512252	0.000005	-0.403	-7.5	-7.5
31-301	31-301-8-1	240.59	2300	0.71601	0.00004	88	107	3.54	0.71590	5	23	0.121	0.512188	0.000005	-0.383	-8.8	-8.8
127-794A	127-794A-5H-5	42.74	1200	0.71167	0.00004	163	108	1.91	0.71163	7	34	0.128	0.512301	0.000007	-0.350	-6.6	-6.6
127-794A	127-794A-7H-1	55.54	1600	0.71310	0.00003	137	131	2.76	0.71303	6	31	0.124	0.512291	0.000005	-0.369	-6.8	-6.8
127-794A	127-794A-8H-6	72.71	2300	0.71210	0.00003	126	99	2.27	0.71203	5	22	0.122	0.512295	0.000008	-0.381	-6.7	-6.7
127-794A	127-794A-10H-4	88.38	2800	0.71318	0.00004	85	77	2.62	0.71308	4	19	0.125	0.512311	0.000008	-0.366	-6.4	-6.4
127-794A	127-794A-11H-2	94.05	3000	0.71155	0.00003	132	83	1.82	0.71148	5	22	0.129	0.512313	0.000005	-0.342	-6.3	-6.3
127-794A	127-794A-11H-6	101.20	3100	0.71298	0.00007	123	100	2.36	0.71287	6	27	0.127	0.512296	0.000004	-0.356	-6.7	-6.6
127-795A	127-795A-7H-5	63.48	1100	0.70919	0.00005	145	73	1.46	0.70917	5	21	0.135	0.512462	0.000014	-0.316	-3.4	-3.4
127-795A	127-795A-9H-1	76.26	1300	0.71022	0.00006	139	94	1.96	0.71019	6	25	0.135	0.512413	0.000004	-0.311	-4.4	-4.4
127-795A	127-795A-10H-1	86.31	1500	0.70899	0.00011	142	89	1.81	0.70895	5	22	0.134	0.512447	0.000008	-0.321	-3.7	-3.7
127-795A	127-795A-11H-7	104.11	1600	0.71121	0.00002	121	98	2.36	0.71092	5	23	0.129	0.512361	0.000002	-0.344	-5.4	-5.4
127-795A	127-795A-14H-5	129.71	2000	0.70899	0.00004	122	68	1.60	0.70895		17	0.132	0.512411	0.000007	-0.331	-4.4	-4.4
127-795A	127-795A-16H-1	143.13	2100	0.70964	0.00006	83	72	2.16	0.70935	4	18	0.134
127-797B	127-797B-7-4	58.59	1100	0.71545	0.00004	128	125	2.83	0.71540	7	35	0.121	0.512215	0.000006	-0.385	-8.3	-8.2
127-797B	127-797B-9H-5	79.29	1600	0.71155	0.00008	321	117	1.06	0.71153	6	27	0.127	0.512218	0.000006	-0.355	-8.2	-8.2
127-797B	127-797B-11H-6	100.24	2000	0.71239	0.00008	173	115	1.92	0.71234	6	27	0.127	0.512226	0.000006	-0.356	-8.0	-8.0
127-797B	127-797B-13H-5	117.77	2400	0.71224	0.00003	111	84	2.20	0.71217				0.512328	0.000004	-0.365	-6.1	-6.0
127-797B	127-797B-15H-6	137.81	2800	0.71357	0.00003	141	123	2.16	0.71348	4	19	0.131	0.512217	0.000004	-0.332	-8.2	-8.2
124-768B	127-768B-11H-2	91.23				635	34	0.15
124-768B	127-768B-13H-4	113.04				799	34	0.12
124-768B	127-768B-14H-1	119.17				843	40	0.14
124-768B	127-768B-14H-5	124.17				151	100	1.91
124-768B	127-768B-15H-6	135.48		0.70749		168	87	1.50	0.70749	4	20	0.129	0.512439	0.000006	-3.900	-3.9
124-768B	127-768B-16H-6	145.31		0.70544		112	103	2.66	0.70544
124-769B	127-769B-10H-3	85.06		0.70861		645	34	0.15	0.70861	2	10	0.136	0.512615	0.000006	-0.500	-0.4
124-769B	127-769B-11H-2	93.07		0.70861		674	40	0.17	0.70861				0.512482	0.000024	-3.000	-3.0
124-769B	127-769B-12H-2	102.63		0.70713		206	72	1.01	0.70713	4	17	0.138	0.512500	0.000004	-2.600	-2.6
124-769B	127-769B-13H-5	116.81		0.70795		182	87	1.38	0.70795	5	21	0.137	0.512418	0.000008	-4.300	-4.3
124-769B	127-769B-14H-3	123.21		0.70750		1178	65	0.81	0.70750	4	19	0.132	0.512484	0.000007	-3.000	-3.0
124-771A	124-771-1R-1	100.81				405	72	0.51