Citation:

odp.proc.sr.115.125.1990

Name: Geochemical analyses of secondary minerals from ODP Leg 115 basalts (Tables 1+2)
Published: 1990
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Basalts recovered along the Reunion hotspot track on Ocean Drilling Program (ODP) Leg 115 range in age from 34 Ma at Site 706 to 64 Ma at Site 707. They have undergone various degrees of secondary alteration. Within single holes the amount of alteration can vary from a few percent to near complete replacement of phenocrysts and groundmass by secondary minerals. Olivine appears to be the most susceptible to alteration and in some sections it is the only mineral altered. In other sections, olivine, pyroxene and plagioclase phenocrysts, and groundmass have been completely replaced by secondary minerals.

Clays are the predominant form of secondary mineralization. In addition to replacing olivine, pyroxene, glass, and groundmass, clays have filled veins, vesicles, and voids. Minor amounts of calcite, zeolites, and K-feldspar were also detected. The clays that filled vesicles and veins often show color zonations of dark, opaque bands near the edges that grade into tan or green transparent regions in the centers of the veins. The electron microprobe was used to obtain chemical analyses of these veins as well as to characterize isolated clays that replaced specific minerals and filled voids and vesicles.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: -8.284100 * Median Longitude: 64.594000 * South-bound Latitude: -13.114000 * West-bound Longitude: 59.016800 * North-bound Latitude: -4.193000 * East-bound Longitude: 73.394200

Date/Time Start: 1987-05-24T03:30:00 * Date/Time End: 1987-06-20T09:15:00

Minimum Elevation: -2920.0 m * Maximum Elevation: -1552.0 m

Event(s):

115-706C * Latitude: -13.114000 * Longitude: 61.371000 * Date/Time Start: 1987-05-24T03:30:00 * Date/Time End: 1987-05-26T00:45:00 * Elevation: -2518.0 m * Penetration: 121.7 m * Recovery: 19.72 m * Location: South Indian Ridge, South Indian Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 77.4 m cored; 0 m drilled; 25.5 % recovery

115-707C * Latitude: -7.545300 * Longitude: 59.016800 * Date/Time Start: 1987-05-29T10:30:00 * Date/Time End: 1987-06-02T03:30:00 * Elevation: -1552.0 m * Penetration: 443.2 m * Recovery: 91.56 m * Location: South Indian Ridge, South Indian Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 259.4 m cored; 0 m drilled; 35.3 % recovery

115-713A * Latitude: -4.193000 * Longitude: 73.394200 * Date/Time Start: 1987-06-16T23:30:00 * Date/Time End: 1987-06-20T09:15:00 * Elevation: -2920.0 m * Penetration: 191.7 m * Recovery: 114.98 m * Location: Indian Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 191.7 m cored; 0 m drilled; 60 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device
1	Event label	Event
2	Sample code/label	Sample label		Fisk, Martin R	DSDP/ODP/IODP sample designation
3	Sample code/label 2	Sample label 2		Fisk, Martin R
4	Description	Description		Fisk, Martin R
5	Silicon dioxide	SiO2	%	Fisk, Martin R	Electron microprobe (EMP)
6	Titanium dioxide	TiO2	%	Fisk, Martin R	Electron microprobe (EMP)
7	Aluminium oxide	Al2O3	%	Fisk, Martin R	Electron microprobe (EMP)
8	Iron oxide, FeO	FeO	%	Fisk, Martin R	Electron microprobe (EMP)
9	Manganese oxide	MnO	%	Fisk, Martin R	Electron microprobe (EMP)
10	Magnesium oxide	MgO	%	Fisk, Martin R	Electron microprobe (EMP)
11	Calcium oxide	CaO	%	Fisk, Martin R	Electron microprobe (EMP)
12	Sodium oxide	Na2O	%	Fisk, Martin R	Electron microprobe (EMP)
13	Potassium oxide	K2O	%	Fisk, Martin R	Electron microprobe (EMP)
14	Chromium(III) oxide	Cr2O3	%	Fisk, Martin R	Electron microprobe (EMP)
15	Sum	Sum	%	Fisk, Martin R	Electron microprobe (EMP)

License:

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

Size:

546 data points

Data

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

1 Event	2 Sample label	3 Sample label 2	4 Description	5 SiO2 [%]	6 TiO2 [%]	7 Al2O3 [%]	8 FeO [%]	9 MnO [%]	10 MgO [%]	11 CaO [%]	12 Na2O [%]	13 K2O [%]	14 Cr2O3 [%]	15 Sum [%]
115-706C	115-706C-2R-1,76-80	31-6	Tan clay in interior of vesicle	47.95	0.22	11.09	12.52	0.05	8.65	0.84	0.26	1.45	0.04	83.06
115-706C	115-706C-2R-1,76-80	31-8	Tan clay replacing olivine in glass	49.29	0.72	12.63	9.89	0.05	7.17	0.71	0.22	1.68	0.04	82.41
115-706C	115-706C-2R-1,76-80	31-9	Clay replacing olivine in glass	50.16	0.97	11.97	9.66	0.05	6.97	0.72	0.21	1.78	0.04	82.53
115-706C	115-706C-2R-1,76-80	31-10	Reddish brown clay at edge of vesicle	40.23	9.96	9.03	12.08	0.12	4.67	1.10	0.68	1.43	0.04	79.35
115-706C	115-706C-2R-1,76-80	31-11	Additional analysis in above vesicle	47.41	0.12	10.48	13.58	0.05	9.65	0.67	0.24	1.49	0.04	83.74
115-706C	115-706C-2R-1,76-80	29-6	Tan clay replacing olivine	46.68	0.88	7.39	21.75	0.09	6.61	1.00	0.40	2.02	0.04	86.86
115-706C	115-706C-2R-1,76-80	29-7	Tan clay replacing olivine	47.69	0.16	11.28	12.64	0.05	8.98	0.65	0.31	1.68	0.04	83.49
115-706C	115-706C-2R-2,2-4	41-14	Dark brown, nearly opaque clay at edge of vein through glass	38.10	14.96	11.97	9.00	0.05	5.37	0.51	0.37	2.01	0.04	82.38
115-706C	115-706C-2R-2,2-4	41-15	Dark clay at center of vein	47.20	0.97	8.83	13.90	0.05	5.43	0.58	0.24	3.89	0.04	81.14
115-706C	115-706C-2R-2,2-4	41-16	Tan clay at center of vein through clear brown glass	44.56	2.04	8.21	26.16	0.20	6.78	4.90	0.52	2.44	0.04	95.86
115-706C	115-706C-2R-2,2-4	41-17	Edge of second vein, tan	45.19	0.88	11.35	8.96	0.05	6.39	3.23	0.23	1.63	0.04	77.95
115-706C	115-706C-2R-2,2-4	41-18	Edge of second vein, tan to green yellow	49.44	0.64	10.87	10.39	0.05	5.62	0.54	0.19	2.99	0.04	80.77
115-706C	115-706C-2R-2,2-4	41-19	Edge of vesicle fill near glass, dark brown-opaque	45.02	2.59	10.30	8.13	0.05	6.23	0.91	0.21	1.82	0.04	75.32
115-706C	115-706C-2R-2,2-4	41-20	Center of vesicle fill, tan-green	45.39	0.26	9.71	11.57	0.05	8.00	0.53	0.23	1.98	0.04	77.77
115-706C	115-706C-2R-2,2-4	41-21	Center of vein, same vein as 41-14 to 41-16	47.07	0.50	11.64	9.34	0.05	6.83	0.46	0.27	2.00	0.04	78.21
115-706C	115-706C-5R-2,102-105	55-26	Tan clay next to glass at edge of vesicle	44.78	11.12	11.89	11.63	0.05	5.64	0.49	0.56	2.26	0.04	88.46
115-706C	115-706C-5R-2,102-105	55-27	Next layer in from above, hard, highly reflective zone	53.72	0.10	9.71	22.34	0.07	5.91	0.33	0.15	4.87	0.04	97.23
115-706C	115-706C-5R-2,102-105	55-28	Center of vesicle, green	48.57	0.04	7.13	18.88	0.05	11.27	0.46	0.09	2.01	0.04	88.54
115-706C	115-706C-5R-2,102-105	55-29	Tan edge of grain	49.99	5.12	10.33	11.90	0.05	5.10	0.89	0.58	2.26	0.04	86.26
115-706C	115-706C-5R-2,102-105	55-30	Half distance to center of vein (next zone in)	43.32	7.76	9.74	12.64	0.05	4.92	0.81	0.24	2.75	0.04	82.27
115-706C	115-706C-5R-2,102-105	55-31	Center of vein, green	54.23	0.06	9.14	18.28	0.05	5.58	0.37	0.17	5.09	0.04	93.00
115-706C	115-706C-5R-3,44-48	58-14	Dark tan altered glass at edge of vesicle	44.73	5.69	19.09	11.42	0.05	15.83	0.94	0.32	1.85	0.04	99.98
115-706C	115-706C-5R-3,44-48	58-15	100 _m from edge of vesicle near iddingsite	45.95	2.00	13.11	11.94	0.17	12.68	1.79	0.16	2.59	0.04	90.42
115-707C	115-707C-23R-1,65-66	86-2	Clay at edge of vesicle containing calcite	47.50	0.04	2.95	11.64	0.05	18.09	1.05	0.37	0.63	0.05	82.37
115-707C	115-707C-23R-1,65-66	86-4	Altered groundmass at edge of vesicle	44.55	0.06	4.09	12.28	0.05	19.13	0.79	0.24	0.45	0.05	81.69
115-707C	115-707C-23R-1,65-66	86-5	Gray clay in vesicle	46.12	0.04	3.21	12.56	0.05	19.01	1.12	0.39	0.38	0.05	82.93
115-707C	115-707C-23R-1,65-66	86-6	Gray clay near edge of void	48.55	0.09	3.86	15.68	0.05	17.87	1.99	0.41	0.43	0.05	88.98
115-707C	115-707C-23R-1,65-66	86-7	Clay replacing groundmass	48.66	0.04	2.79	12.97	0.05	18.45	0.97	0.22	0.52	0.05	84.72
115-707C	115-707C-23R-1,65-66	86-8	Clay replacing groundmass	47.55	0.04	2.25	12.52	0.05	18.64	1.00	0.25	0.48	0.05	82.83
115-707C	115-707C-23R-1,65-66	85-11	Edge of calcite-filled vesicle	46.75	0.04	3.29	14.98	0.05	17.48	0.93	0.23	0.43	0.05	84.22
115-707C	115-707C-28R-3,48-50	103-6	Clay replacing olivine	40.40	0.04	6.90	15.39	0.05	13.79	1.57	0.57	0.39	0.05	79.15
115-707C	115-707C-28R-3,48-50	103-7	Clay replacing olivine	45.67	0.04	3.96	11.00	0.05	18.64	1.10	0.52	0.41	0.05	81.46
115-707C	115-707C-28R-3,48-50	103-8	Clay replacing olivine	34.90	0.05	6.90	11.43	0.09	14.08	1.59	0.19	0.23	0.05	69.50
115-707C	115-707C-28R-3,48-50	101-8	Clay replacing groundmass	31.24	0.12	4.80	16.73	0.05	14.91	1.20	0.06	0.44	0.05	69.59
115-707C	115-707C-28R-3,48-50	101-9	Clay replacing groundmass	24.35	0.04	0.87	28.25	0.60	3.71	14.72	0.07	0.26	0.05	72.92
115-707C	115-707C-28R-3,48-50	101-10	Clay replacing groundmass	36.92	0.32	8.83	13.05	0.05	12.32	2.06	0.27	0.59	0.05	74.45
115-713A	115-713A-15R-3,3-7	119-1	Clay in thin dark-brown vein through glass	53.75	1.17	15.06	5.77	0.05	8.49	4.43	3.63	1.22	0.04	93.60
115-713A	115-713A-15R-3,3-7	119-2	Dark brown clay at center of vein through glass	43.55	0.22	4.83	11.88	0.11	16.12	0.46	0.13	2.14	0.04	79.49
115-713A	115-713A-15R-3,3-7	119-3	Opaque clay at edge of vein through glass	53.11	2.80	15.20	4.96	0.05	10.00	3.51	3.32	1.02	0.04	94.01