Citation:

odp.proc.sr.105.175.1989

Name: Chemical analyses of ODP Hole 105-647A basalts (Table 2)
Creator: D B Clarke
Published: 1989
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Basalt samples recovered from the lowermost 37 m of Leg 105 Hole 647A in the Labrador Sea are fine- to medium grained, have microphenocrysts of clinopyroxene, and show little evidence of alteration. Chemically, these rocks are low potassium (0.01-0.09 wt% K20), olivine- to quartz-normative tholeiites that are also depleted in other incompatible elements. In terms of many of the incompatible trace elements, the Labrador Sea samples are similar both to iV-type midocean ridge basalts (MORBs) and to the terrestrial Paleocene volcanic rocks in the Davis Strait region of Baffin Island and West Greenland. However, significant differences are found in their strontium and neodymium isotope systematics. Hole 647A samples are more depleted in epsilon-Nd (+9.3) and are anomalously rich in 87Sr/86Sr (0.7040) relative to the Davis Strait basalts (epsilon-Nd +2.54 to + 8.97; mean 87Sr/86Sr, 0.7034). We conclude that the Hole 647A and Davis Strait basalts may have been derived from a similar depleted mantle source composition. In addition, the Davis Strait magmas were generated from mantle of more than one composition. We also suggest that there is no geochemical evidence from the Hole 647A samples to support or to refute the existence of foundered continental crust in the Labrador Sea.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 53.331300 * Longitude: -45.262000

Date/Time Start: 1985-10-15T04:10:00 * Date/Time End: 1985-10-23T18:15:00

Minimum Elevation: -3869.0 m * Maximum Elevation: -3869.0 m

Event(s):

105-647A * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-15T04:10:00 * Date/Time End: 1985-10-23T18:15:00 * Elevation: -3869.0 m * Penetration: 736 m * Recovery: 444.6 m * Location: South Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 75 cores; 716.6 m cored; 0 m drilled; 62 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Clarke, D B	DSDP/ODP/IODP sample designation
2	Silicon dioxide	SiO2	%	Clarke, D B
3	Titanium dioxide	TiO2	%	Clarke, D B
4	Aluminium oxide	Al2O3	%	Clarke, D B
5	Iron oxide, Fe2O3	Fe2O3	%	Clarke, D B
6	Iron oxide, FeO	FeO	%	Clarke, D B
7	Manganese oxide	MnO	%	Clarke, D B
8	Magnesium oxide	MgO	%	Clarke, D B
9	Calcium oxide	CaO	%	Clarke, D B
10	Sodium oxide	Na2O	%	Clarke, D B
11	Potassium oxide	K2O	%	Clarke, D B
12	Phosphorus pentoxide	P2O5	%	Clarke, D B
13	Water in rock	H2O	%	Clarke, D B
14	Sum	Sum	%	Clarke, D B
15	Quartz	Qz	%	Clarke, D B		CIPW Norm
16	Orthoclase	Or	%	Clarke, D B		CIPW Norm
17	Albite	Ab	%	Clarke, D B		CIPW Norm
18	Anorthite	An	%	Clarke, D B		CIPW Norm
19	Diopside	Di	%	Clarke, D B		CIPW Norm
20	Hypersthene	Hyp	%	Clarke, D B		CIPW Norm
21	Olivine	Ol	%	Clarke, D B		CIPW Norm
22	Montmorillonite	Mnt	%	Clarke, D B		CIPW Norm
23	Illite	Ill	%	Clarke, D B		CIPW Norm
24	Apatite	Ap	%	Clarke, D B
25	Scandium	Sc	mg/kg	Clarke, D B
26	Vanadium	V	mg/kg	Clarke, D B
27	Chromium	Cr	mg/kg	Clarke, D B
28	Nickel	Ni	mg/kg	Clarke, D B
29	Copper	Cu	mg/kg	Clarke, D B
30	Zinc	Zn	mg/kg	Clarke, D B
31	Strontium	Sr	mg/kg	Clarke, D B
32	Yttrium	Y	mg/kg	Clarke, D B
33	Zirconium	Zr	mg/kg	Clarke, D B
34	Gallium	Ga	mg/kg	Clarke, D B
35	Barium	Ba	mg/kg	Clarke, D B
36	Caesium	Cs	mg/kg	Clarke, D B
37	Hafnium	Hf	mg/kg	Clarke, D B
38	Tantalum	Ta	mg/kg	Clarke, D B
39	Thorium	Th	mg/kg	Clarke, D B
40	Uranium	U	mg/kg	Clarke, D B
41	Lanthanum	La	mg/kg	Clarke, D B
42	Cerium	Ce	mg/kg	Clarke, D B
43	Neodymium	Nd	mg/kg	Clarke, D B
44	Samarium	Sm	mg/kg	Clarke, D B
45	Europium	Eu	mg/kg	Clarke, D B
46	Terbium	Tb	mg/kg	Clarke, D B
47	Ytterbium	Yb	mg/kg	Clarke, D B
48	Lutetium	Lu	mg/kg	Clarke, D B
49	Strontium-87/Strontium-86 ratio	87Sr/86Sr		Clarke, D B
50	ε-Neodymium	ε-Nd		Clarke, D B

License:

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

Size:

390 data points

Data

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

1 Sample label	2 SiO2 [%]	3 TiO2 [%]	4 Al2O3 [%]	5 Fe2O3 [%]	6 FeO [%]	7 MnO [%]	8 MgO [%]	9 CaO [%]	10 Na2O [%]	11 K2O [%]	12 P2O5 [%]	13 H2O [%]	14 Sum [%]	15 Qz [%]	16 Or [%]	17 Ab [%]	18 An [%]	19 Di [%]	20 Hyp [%]	21 Ol [%]	22 Mnt [%]	23 Ill [%]	24 Ap [%]	25 Sc [mg/kg]	26 V [mg/kg]	27 Cr [mg/kg]	28 Ni [mg/kg]	29 Cu [mg/kg]	30 Zn [mg/kg]	31 Sr [mg/kg]	32 Y [mg/kg]	33 Zr [mg/kg]	34 Ga [mg/kg]	35 Ba [mg/kg]	36 Cs [mg/kg]	37 Hf [mg/kg]	38 Ta [mg/kg]	39 Th [mg/kg]	40 U [mg/kg]	41 La [mg/kg]	42 Ce [mg/kg]	43 Nd [mg/kg]	44 Sm [mg/kg]	45 Eu [mg/kg]	46 Tb [mg/kg]	47 Yb [mg/kg]	48 Lu [mg/kg]	49 87Sr/86Sr	50 ε-Nd
105-647A-73R-6	49.47	1.11	13.65	1.69	9.57	0.18	8.01	11.91	2.21	0.03	0.11	0.98	98.92		0.18	18.70	27.24	25.50	19.85	1.66	2.45	2.11	0.25		344	360	58	78	79	79	31	71	18
105-647A-74R-1	49.33	1.06	14.02	1.61	9.08	0.18	8.04	11.87	1.82	0.05	0.11	1.61	98.78	1.20	0.30	15.40	29.94	23.08	22.65		2.33	2.01	0.25	46	317	378	52	86	81	82	30	69	16	86	0.06	1.49	0.08	0.09	0.21	1.69	5.74	5.97	2.34	0.91	0.64	2.95	0.54
105-647A-74R-2	50.42	1.05	13.89	1.73	9.79	0.23	8.73	12.08	2.05	0.03	0.16		100.16		0.18	17.35	28.61	24.76	23.12	1.27	2.51	1.99	0.37	50	320	417	61	98	92	75	30	67	16	97	0.05	1.65	0.08	0.08	0.24	1.68	5.63	5.72	2.33	0.88	0.61	3.18	0.53	0.7039	9.36
105-647A-74R03	50.06	1.15	13.95	1.85	10.47	0.33	8.69	11.44	2.03	0.04	0.16		100.17		0.24	17.18	28.84	22.04	25.05	1.60	2.68	2.18	0.37		328	392	73	82	74	81	29	69	16
105-647A-74R-4	48.78	1.17	13.21	1.71	9.61	0.21	8.66	11.41	1.76	0.05	0.11	2.04	98.72	0.64	0.30	14.89	28.00	22.79	25.11		2.48	2.22	0.25		337	364	90	78	80	81	29	71	19
105-647A-74R-5	49.43	1.01	13.79	1.95	11.05	0.19	9.42	11.02	2.11	0.09	0.15		100.21		0.53	17.85	27.89	21.14	20.21	7.50	2.83	1.92	0.35		322	319	98	80	81	86	28	68	19
105-647A-75R-4	49.18	1.12	13.98	1.98	11.19	0.24	9.56	10.82	1.93	0.04	0.15		100.19		0.24	16.33	29.37	19.11	23.97	5.83	2.87	2.13	0.35	33	339	349	115	108	105	86	31	73	14	87	0.17	1.58	0.07	0.05	0.24	1.41	4.78	5.24	1.94	0.78	0.51	2.61	0.44	0.7044	9.56
105-647A-72R-1																									402	196	36	86	80	84	33	79	17
105-647A-72R-2																								49	396	211	44	122	98	82	32	78	19	92	0.06	2.18	0.11	0.14	0.29	2.09	7.09	7.52	2.93	1.06	0.73	3.68	0.65	0.7041	9.17
105-647A-72R-3																									429	209	44	101	90	80	33	81	19
105-647A-72R-4																								48	394	188	40	124	92	89	36	80	17	106	0.05	2.07	0.11	0.07	0.19	1.95	6.45	7.28	2.78	1.11	0.64	3.58	0.62	0.7039	9.17
105-647A-73R-3																								42	357	230	39	138	80	82	30	64	14	96	0.05	1.61	0.07	0.08	0.15	1.81	5.33	6.05	2.23	0.88	0.58	2.88	0.48	0.7039	9.36
105-647A-73R-4																									344	233	47	109	77	79	31	74	15
105-647A-73R-5																									368	249	45	103	84	77	31	74	17