Citation:

0025-3227(78)90048-8

Name: (Table 3) Chemical analyses from DSDP Holes 22-214, 22-215 and 22-216 in the Indian Ocean
Published: 1978
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The basalts and oceanic andesites from the aseismic Ninetyeast Ridge display trachytic, vesicular and amygdaloidal textures suggesting a subaerial volcanic environment. The normative composition of the Ninetyeast Ridge ranges from olivine picriteto nepheline-normative alkaline basalt, suggesting a wide range of differentiation. This is further supported by the fractionation-differentiation trends displayed by transition metal trace elements (Ni, Cr, V and Cu). The Ninetyeast Ridge rocks are enriched in rare earth (RE) and large ion lithophile (LIL) elements and Sr isotopes (0.7043-0.7049), similar to alkali basalts and tholeiites from seamounts and islands, but different from LIL-element-depleted tholeiitic volcanic rocks of the recent seismic mid-Indian oceanic ridge. The constancy of 87Sr/86Sr ratios for basalts and andesites is compatible with a model involving fractional crystallization of mafic magma. The variation of 87Sr/86Sr ratios between 0.97 and 2.79 may possibly be explained in terms of a primordial hot mantle and/or chemically contrasting heterogeneous mantle source layers relatively undepleted in LIL elements at different periods in the geologic past. In general, the Sr isotopic data for rocks from different tectonic environments are consistent with a "zoning-depletion model" with systematically arranged alternate alkali-poor and alkali-rich layers in the mantle beneath the Indian Ocean.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Median Latitude: -5.998767 * Median Longitude: 88.572567 * South-bound Latitude: -11.336800 * West-bound Longitude: 86.791700 * North-bound Latitude: 1.462200 * East-bound Longitude: 90.208000

Date/Time Start: 1972-02-08T00:00:00 * Date/Time End: 1972-02-18T00:00:00

Minimum Elevation: -5309.0 m * Maximum Elevation: -1655.0 m

Event(s):

22-214 * Latitude: -11.336800 * Longitude: 88.718000 * Date/Time: 1972-02-08T00:00:00 * Elevation: -1655.0 m * Penetration: 500 m * Recovery: 340.9 m * Location: Indian Ocean//RIDGE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 492.5 m cored; 2.5 m drilled; 69.2 % recovery

22-215 * Latitude: -8.121700 * Longitude: 86.791700 * Date/Time: 1972-02-13T00:00:00 * Elevation: -5309.0 m * Penetration: 175 m * Recovery: 116 m * Location: Indian Ocean//BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 175 m cored; 0 m drilled; 66.3 % recovery

22-216 * Latitude: 1.462200 * Longitude: 90.208000 * Date/Time: 1972-02-18T00:00:00 * Elevation: -2237.0 m * Penetration: 477.5 m * Recovery: 169.2 m * Location: Indian Ocean//RIDGE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 353 m cored; 0 m drilled; 47.9 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Sample code/label	Sample label		Reddy, V Viswanatha	DSDP/ODP/IODP sample designation
3	Rock type	Rock		Reddy, V Viswanatha
4	Potassium	K	mg/kg	Reddy, V Viswanatha
5	Rubidium	Rb	mg/kg	Reddy, V Viswanatha
6	Caesium	Cs	mg/kg	Reddy, V Viswanatha
7	Lanthanum	La	mg/kg	Reddy, V Viswanatha
8	Cerium	Ce	mg/kg	Reddy, V Viswanatha
9	Samarium	Sm	mg/kg	Reddy, V Viswanatha
10	Europium	Eu	mg/kg	Reddy, V Viswanatha
11	Terbium	Tb	mg/kg	Reddy, V Viswanatha
12	Ytterbium	Yb	mg/kg	Reddy, V Viswanatha
13	Nickel	Ni	mg/kg	Reddy, V Viswanatha	Emission spectrometry
14	Chromium	Cr	mg/kg	Reddy, V Viswanatha	Emission spectrometry
15	Vanadium	V	mg/kg	Reddy, V Viswanatha	Emission spectrometry
16	Copper	Cu	mg/kg	Reddy, V Viswanatha	Emission spectrometry
17	Potassium/Caesium ratio	K/Cs		Reddy, V Viswanatha
18	Potassium/Rubidium ratio	K/Rb		Reddy, V Viswanatha
19	Strontium-87/Strontium-86 ratio	87Sr/86Sr		Reddy, V Viswanatha
20	Lanthanum/Samarium ratio	La/Sm		Reddy, V Viswanatha		(La/Sm)e.f.
21	Lanthanum/Ytterbium ratio	La/Yb		Reddy, V Viswanatha		(La/Yb)e.f.

License:

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

Size:

158 data points

Data

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

1 Event	2 Sample label	3 Rock	4 K [mg/kg]	5 Rb [mg/kg]	6 Cs [mg/kg]	7 La [mg/kg]	8 Ce [mg/kg]	9 Sm [mg/kg]	10 Eu [mg/kg]	11 Tb [mg/kg]	12 Yb [mg/kg]	13 Ni [mg/kg]	14 Cr [mg/kg]	15 V [mg/kg]	16 Cu [mg/kg]	17 K/Cs	18 K/Rb	19 87Sr/86Sr	20 La/Sm	21 La/Yb
22-214	22-214-53-1,26-30	Basalt	1743	2.64	0.24	10.7	22.5	5.01	1.66	0.76	3.66					7263	660	0.7046	1.11	1.77
22-214	22-214-53-1,32-35	Basalt	2400	3.55	0.63	31.1	81.8	6.10	1.77	1.15		33	36	192	150	3908	670	?0.7048	2.79
22-214	22-214-54-3,0-4	Basalt	2158	3.83	0.31	7.2	12.5	2.72	0.81	0.55	1.76					6961	561		1.46	2.48
22-214	22-214-54-2,28-30	Basalt				9.2		4.60										0.7043	1.10
22-214	22-214-48-1,76-83	Oceanic andesites	12948	35.10	0.55	38.7	67.2	11.10	3.01	2.00	5.15	15	10	22	5	23542	369	0.7049	1.94	4.55
22-214	22-214-49-2,0-7	Oceanic andesites	12948	48.70	0.79	36.8	64.2	10.40	2.94	1.43	4.88					16390	266	0.7049	1.94	4.57
22-215	22-215-18-1,68-73	Basalt (glass)	6900	26.80	0.42	17.8	61.1	5.15	1.79	0.69						16586	256	0.7045	1.89
22-215	22-215-19-1,87-93	Basalt	6640	19.50	0.16	17.5	31.6	5.11	1.70	1.19	2.65	104	240	246	54	41500	341		1.89	4.00
22-216	22-216-37-2,80-87	Basalt	6059	19.70	0.26	16.6	30.8	5.45	1.60	0.91	3.62					23304	308		1.67	2.78
22-216	22-216-38-2,79-85	Basalt	6889	16.40	0.13	14.8	30.2	5.72	1.62	1.13	3.85	20	25	249	48	52992	420		1.42	2.33