Citation:

0012-821X(77)90148-0

Name: Composition of chromian diopside megacryst in DSDP Leg 37 basalts (Table 2, 3)
Published: 1977
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Refractory megacrysts of olivine, plagioclase, chromian diopside and Cr-Al spinel, which were not in equilibrium with the host oceanic tholeiite on eruption, are present in samples from several dredge sites and DSDP drill sites in the Atlantic and Pacific Oceans. They have multiple origins: (1) cognate or accidental mantle fragments; (2) relict fragments from fractional crystallization of parental liquids considerably more primitive than oceanic tholeiite; and most commonly (3) the fractional crystallization products of such liquids mixed with oceanic tholeiite magma. Melt inclusions in chrome-spinel phenocrysts provide evidence for this postulated Mg- and Ca-rich magma which has counterparts in the Scottish Tertiary Province and in west Greenland.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Median Latitude: 37.017700 * Median Longitude: -34.160233 * South-bound Latitude: 36.878700 * West-bound Longitude: -35.198700 * North-bound Latitude: 37.295700 * East-bound Longitude: -33.641000

Date/Time Start: 1974-06-17T00:00:00 * Date/Time End: 1974-07-18T00:00:00

Minimum Elevation: -3188.0 m * Maximum Elevation: -1806.0 m

Event(s):

37-332A * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1818.0 m * Penetration: 434.5 m * Recovery: 66.2 m * Location: North Atlantic/VALLEY * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 39 cores; 370.5 m cored; 0 m drilled; 17.9 % recovery

37-332B * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1806.0 m * Penetration: 721.5 m * Recovery: 122.9 m * Location: North Atlantic/VALLEY * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 582.5 m cored; 0 m drilled; 19.4 % recovery

37-335 * Latitude: 37.295700 * Longitude: -35.198700 * Date/Time: 1974-07-18T00:00:00 * Elevation: -3188.0 m * Penetration: 562 m * Recovery: 59 m * Location: North Atlantic * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 152 m cored; 0 m drilled; 38.8 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Elevation of event	Elevation	m
5	Sample code/label	Sample label		Donaldson, Colin H	DSDP/ODP/IODP sample designation
6	Lithology/composition/facies	Lithology		Donaldson, Colin H
7	Silicon dioxide	SiO2	%	Donaldson, Colin H
8	Titanium dioxide	TiO2	%	Donaldson, Colin H
9	Aluminium oxide	Al2O3	%	Donaldson, Colin H
10	Aluminium oxide	Al2O3	%	Donaldson, Colin H		of basalt
11	Chromium(III) oxide	Cr2O3	%	Donaldson, Colin H
12	Iron oxide, Fe2O3	Fe2O3	%	Donaldson, Colin H
13	Iron oxide, FeO	FeO	%	Donaldson, Colin H
14	Manganese oxide	MnO	%	Donaldson, Colin H
15	Magnesium oxide	MgO	%	Donaldson, Colin H
16	Calcium oxide	CaO	%	Donaldson, Colin H
17	Sodium oxide	Na2O	%	Donaldson, Colin H
18	Potassium oxide	K2O	%	Donaldson, Colin H
19	Magnesium number	Mg#		Donaldson, Colin H
20	Wollastonite	Wo	%	Donaldson, Colin H
21	Enstatite	En	%	Donaldson, Colin H
22	Ferrosilite	Fs	%	Donaldson, Colin H
23	Chromium	Cr	mg/kg	Donaldson, Colin H		of basalt

License:

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

Size:

46 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Sample label	6 Lithology	7 SiO2 [%]	8 TiO2 [%]	9 Al2O3 [%]	10 Al2O3 [%] (of basalt)	11 Cr2O3 [%]	12 Fe2O3 [%]	13 FeO [%]	14 MnO [%]	15 MgO [%]	16 CaO [%]	17 Na2O [%]	18 K2O [%]	19 Mg#	20 Wo [%]	21 En [%]	22 Fs [%]	23 Cr [mg/kg] (of basalt)
37-332A	36.8787	-33.6410	-1818.0	37-332A-40-2,59-63	Augite phenocryst	53.17	0.29	2.53	17.15	0.18		5.54	0.17	18.76	19.47	0.21			39.0	52.3	8.7	480
37-332B	36.8787	-33.6410	-1806.0	37-332B-21-1,24-27	Cr-Al spinel	0.00	0.40	24.18		44.37	0	15.25	0.27	15.25	0.00	0.00	0	0.641
37-335	37.2957	-35.1987	-3188.0	37-335-7-3,77-79	Chromian diopside	51.75	0.19	4.25	15.28	1.16		3.17	0.08	17.60	20.96	0.18			43.1	51.6	5.3	342