Citation:

j.palaeo.2005.06.005

Name: Rubidium, Strontium and Neodymium isotopic ratios of the carbonate-free fraction of ODP Site 184-1145 in the South China Sea (Table 2)
Published: 2005
License: https://creativecommons.org/licenses/by/3.0/

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Published: 2005 (exact date unknown) • DOI registered: 2008-06-23

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Abstract:

A coupled approach based on clay mineral assemblages and isotopic data (Sr and Nd) of sediment from Ocean Drilling Program (ODP) Site 1145 has been used to trace the sources of sediment feeding the northern part of the South China Sea, and to investigate the evolution of East Asian monsoon intensity over the last 450 ky. Clay mineral assemblages are dominated by illite and smectite, with lesser abundance of chlorite and kaolinite. 87Sr / 86Sr and epsilonNd(0) isotopic data, combined with the smectite / (illite+chlorite) ratio, indicate that the Pearl River is the main contributor for detrital material to the northern margin of the SCS, with variable continental input of volcanic material derived from the erosion of the Luzon Arc. These inputs follow the low-latitude solar insolation with a 23 ky periodicity, as recorded by a periodic change of the clay mineralogy. For the first time, this study presents a SCS deep-sea sediment high-resolution record of climatic changes in the last 450 ky, showing that smectite / (illite+chlorite) variations are mainly related to changes in the East Asian summer monsoon intensity. Because the mineralogical record is independent of other external forcing phenomena such as global glacial/interglacial oscillations, the smectite / (illite+chlorite) ratio has been used here as a proxy to reconstruct past changes of the South-East Asian summer monsoon intensity.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 19.584017 * Longitude: 117.630967

Date/Time Start: 1999-03-18T00:00:00 * Date/Time End: 1999-03-21T00:00:00

Minimum DEPTH, sediment/rock: 0.88 m * Maximum DEPTH, sediment/rock: 70.63 m

Event(s):

184-1145 * Latitude: 19.584017 * Longitude: 117.630967 * Date/Time Start: 1999-03-18T00:00:00 * Date/Time End: 1999-03-21T00:00:00 * Elevation: -3175.5 m * Penetration: 598.1 m * Recovery: 554.7 m * Location: South China Sea * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 65 cores; 598.1 m cored; 0 m drilled; 92.7% recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	AGE	Age	ka BP			Geocode
3	Sample code/label	Sample label		Boulay, Sebastien	DSDP/ODP/IODP sample designation
4	Strontium	Sr	mg/kg	Boulay, Sebastien	Mass spectrometer Finnigan MAT 262
5	Rubidium	Rb	mg/kg	Boulay, Sebastien	Mass spectrometer Finnigan MAT 262
6	Neodymium	Nd	mg/kg	Boulay, Sebastien	Mass spectrometer Finnigan MAT 262
7	Rubidium/Strontium ratio	Rb/Sr		Boulay, Sebastien	Mass spectrometer Finnigan MAT 262
8	Strontium-87/Strontium-86 ratio	87Sr/86Sr		Boulay, Sebastien	Mass spectrometer Finnigan MAT 262
9	Strontium-87/Strontium-86 ratio, error	87Sr/86Sr e	±	Boulay, Sebastien	Mass spectrometer Finnigan MAT 262	2 sigma
10	Neodymium-143/Neodymium-144 ratio	143Nd/144Nd		Boulay, Sebastien	Mass spectrometer Finnigan MAT 262
11	Neodymium-143/Neodymium-144 ratio, error	143Nd/144Nd e	±	Boulay, Sebastien	Mass spectrometer Finnigan MAT 262	2 sigma
12	ε-Neodymium (0)	ε-Nd(0)		Boulay, Sebastien	Mass spectrometer Finnigan MAT 262

License:

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

Size:

368 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 Sample label	4 Sr [mg/kg]	5 Rb [mg/kg]	6 Nd [mg/kg]	7 Rb/Sr	8 87Sr/86Sr	9 87Sr/86Sr e [±]	10 143Nd/144Nd	11 143Nd/144Nd e [±]	12 ε-Nd(0)
0.88	7.6	184-1145C-1H1,68-70	105	159	25	1.52	0.71633	0.00001	0.512099	0.000007	-10.5
1.58	12.5	184-1145C-1H1,138-140	100	110	22	1.10	0.71698	0.00002	0.512080	0.000008	-10.9
3.38	19.7	184-1145C-1H3,18-20	98	165	27	1.69	0.71912	0.00001	0.512067	0.000009	-11.1
4.78	24.5	184-1145C-1H4,8-10	119	125	26	1.05	0.71654	0.00001	0.512082	0.000008	-10.8
6.78	31.3	184-1145C-1H5,58-60	106	149		1.41	0.71742	0.00001
8.58	37.5	184-1145B-2H2,18-20	104	167	27	1.60	0.71786	0.00001	0.512069	0.000006	-11.1
9.78	41.7	184-1145B-2H2,138-140	119	135	25	1.14	0.71487	0.00003	0.512105	0.000008	-10.4
11.58	48.5	184-1145B-2H4,18-20	168	151		0.90	0.71462	0.00006
12.98	55.4	184-1145B-2H5,8-10	103	196	28	1.90	0.72122	0.00001	0.512050	0.000006	-11.5
14.38	61.1	184-1145C-2H3,68-70	106	154	25	1.45	0.71831	0.00001	0.512083	0.000006	-10.8
15.38	65.1	184-1145C-2H4,18-20	101	151	29	1.50	0.72227	0.00001	0.512064	0.000008	-11.2
17.38	74.1	184-1145C-2H5,68-70	105	173	26	1.64	0.71900	0.00001	0.512085	0.000007	-10.8
18.98	84.2	184-1145C-2H6,78-80	100	186	28	1.87	0.72281	0.00001	0.512060	0.000008	-11.3
19.98	90.6	184-1145B-3H2,138-140	114	174	27	1.52	0.71885	0.00002	0.512075	0.000008	-11.0
20.78	95.7	184-1145B-3H3,68-70	109	167	25	1.52	0.71772	0.00001	0.512084	0.000066	-10.8
22.98	109.7	184-1145B-3H4,138-140	113	175	27	1.54	0.71838	0.00002	0.512079	0.000007	-10.9
23.98	118.1	184-1145B-3H5,88-90	120	136	21	1.14	0.71480	0.00003	0.512104	0.000009	-10.4
24.68	126.8	184-1145B-3H6,8-10	109	134	22	1.22	0.71549	0.00001	0.512092	0.000019	-10.7
25.88	138.0	184-1145A-4H2,48-50	138	136	24	0.99	0.71371	0.00007	0.512090	0.000007	-10.7
27.08	147.3	184-1145A-4H3,18-20	105	137	25	1.30	0.71712	0.00001	0.512069	0.000009	-11.1
27.98	154.2	184-1145A-4H3,108-110	109	141	26	1.29	0.71772	0.00001	0.512076	0.000006	-11.0
29.58	161.9	184-1145A-4H4,118-120	117	136	25	1.17	0.71447	0.00001	0.512186	0.000009	-8.8
30.78	165.4	184-1145A-4H5,88-90	107	137	26	1.28	0.71802	0.00001	0.512079	0.000008	-10.9
33.93	174.7	184-1145C-4H3,8-10	106	166		1.57	0.72148	0.00001
36.53	182.3	184-1145C-4H4,118-120	107	174	29	1.63	0.72250	0.00003	0.512048	0.000007	-11.5
38.33	187.6	184-1145C-4H5,148-150	110	158	27	1.44	0.72026	0.00001	0.512079	0.000007	-10.9
40.33	198.3	184-1145B-5H2,118-120	108	146	23	1.36	0.71779	0.00001	0.512079	0.000007	-10.9
42.33	212.5	184-1145B-5H4,18-20	112	173	27	1.55	0.72046	0.00004	0.512052	0.000006	-11.4
43.73	222.4	184-1145B-5H5,8-10	102	171	28	1.67	0.72109	0.00001	0.512064	0.000007	-11.2
45.13	232.3	184-1145B-5H5,148-150	126	137	23	1.09	0.71451	0.00001	0.512099	0.000006	-10.5
47.53	248.2	184-1145C-5H5,108-110	104	166	27	1.59	0.71890	0.00001	0.512039	0.000006	-11.7
49.93	261.5	184-1145B-6H2,58-60	110	147	24	1.34	0.71755	0.00001	0.512046	0.000005	-11.6
51.73	271.6	184-1145B-6H3,88-90	103	186	27	1.80	0.72071	0.00001	0.512057	0.000009	-11.3
52.33	275.1	184-1145B-6H3,148-150	112	165		1.48	0.72010	0.00002
54.43	286.5	184-1145B-6H5,58-60	163	122	20	0.75	0.71137	0.00002	0.512172	0.000009	-9.1
57.83	310.3	184-1145C-6H5,58-60	123	154	26	1.25	0.71617	0.00001	0.512062	0.000006	-11.2
61.03	340.1	184-1145B-7H2,148-150	119		26		0.71649	0.00001	0.512081	0.000008	-10.9
66.43	375.2	184-1145B-7H6,108-110	112	180		1.61	0.71991	0.00001
70.63	409.2	184-1145B-8H3,68-70	126	141	26	1.12	0.71437	0.00001	0.512128	0.000006	-10.0