Citation:

odp.proc.sr.135.127.1994

Name: (Table 1) Chemical composition of segregations and groundmass seperates of ODP Leg 135 samples
Creator: Sherman H Bloomer
Published: 1994
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Concentrations of dark-colored, highly vesicular, quench-textured mesostasis occur commonly in volcanic rocks drilled in the Lau Basin during Leg 135. These segregations occur as veins, patches, and vesicle linings in rocks with 49%-54% SiO2. The segregations are depleted in Mg, Ca, Al, Sc, Ni, and Cr and enriched in Ti, Ba, Y, and Zr compared to the groundmass with which they occur. Many of the segregations are unusually enriched in copper. The elemental variations show that the segregations are residual liquids produced by 12%-55% crystallization of plagioclase and clinopyroxene, with minor olivine, opaques, or orthopyroxene from the groundmass melt. The liquids forming the segregations are mobilized and emplaced in earlier formed vesicles during the rapid crystallization of the groundmass. The dominant process in this mobilization and emplacement is volatile exsolution from crystallizing melts constrained by a rigid crystalline framework. This exsolution produces significant overpressures within the late-stage melts; the overpressure drives the residual melts through the walls of the older vesicles, along planes of weakness, and into voids. This mechanism is consistent with the occurrence of bimodal vesicle populations in many of the host lavas.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: -19.480000 * Median Longitude: -177.110000 * South-bound Latitude: -20.709000 * West-bound Longitude: -177.862000 * North-bound Latitude: -18.501000 * East-bound Longitude: -176.500000

Date/Time Start: 1990-12-23T20:39:00 * Date/Time End: 1991-01-24T00:40:00

Minimum Elevation: -2917.0 m * Maximum Elevation: -2469.0 m

Event(s):

135-834B * Latitude: -18.568000 * Longitude: -177.862000 * Date/Time Start: 1990-12-23T20:39:00 * Date/Time End: 1990-12-31T08:40:00 * Elevation: -2703.0 m * Penetration: 435.3 m * Recovery: 105.44 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 59 cores; 375.5 m cored; 0 m drilled; 28.1 % recovery

135-835B * Latitude: -18.501000 * Longitude: -177.303000 * Date/Time: 1991-01-02T08:30:00 * Elevation: -2917.0 m * Penetration: 183 m * Recovery: 8.86 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 49.8 m cored; 0 m drilled; 17.8 % recovery

135-836B * Latitude: -20.142000 * Longitude: -176.500000 * Date/Time Start: 1991-01-07T19:40:00 * Date/Time End: 1991-01-09T02:10:00 * Elevation: -2469.0 m * Penetration: 58.3 m * Recovery: 17 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 44.8 m cored; 0 m drilled; 37.9 % 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		Bloomer, Sherman H	DSDP/ODP/IODP sample designation
6	Lithologic unit/sequence	Unit		Bloomer, Sherman H
7	Sample comment	Sample comment		Bloomer, Sherman H		fill = segregation, matrix = groundmass matrix
8	Type	Type		Bloomer, Sherman H
9	Mass	Mass	g	Bloomer, Sherman H		of filling, #1
10	Mass	Mass	g	Bloomer, Sherman H		of filling, #2
11	Silicon dioxide	SiO2	%	Bloomer, Sherman H
12	Titanium dioxide	TiO2	%	Bloomer, Sherman H
13	Aluminium oxide	Al2O3	%	Bloomer, Sherman H
14	Iron oxide, Fe2O3	Fe2O3	%	Bloomer, Sherman H
15	Manganese oxide	MnO	%	Bloomer, Sherman H
16	Magnesium oxide	MgO	%	Bloomer, Sherman H
17	Calcium oxide	CaO	%	Bloomer, Sherman H
18	Sodium oxide	Na2O	%	Bloomer, Sherman H
19	Potassium oxide	K2O	%	Bloomer, Sherman H
20	Phosphorus pentoxide	P2O5	%	Bloomer, Sherman H
21	Pseudonodosaria symmetrica	P. symmetrica	%	Bloomer, Sherman H
22	Phosphorus	P	mg/kg	Bloomer, Sherman H
23	Zinc	Zn	mg/kg	Bloomer, Sherman H
24	Nickel	Ni	mg/kg	Bloomer, Sherman H
25	Chromium	Cr	mg/kg	Bloomer, Sherman H
26	Vanadium	V	mg/kg	Bloomer, Sherman H
27	Copper	Cu	mg/kg	Bloomer, Sherman H
28	Zirconium	Zr	mg/kg	Bloomer, Sherman H
29	Scandium	Sc	mg/kg	Bloomer, Sherman H
30	Yttrium	Y	mg/kg	Bloomer, Sherman H
31	Strontium	Sr	mg/kg	Bloomer, Sherman H
32	Barium	Ba	mg/kg	Bloomer, Sherman H
33	Titanium/Zirconium ratio	Ti/Zr		Bloomer, Sherman H
34	Yttrium/Zirconium ratio	Y/Zr		Bloomer, Sherman H
35	Barium/Zirconium ratio	Ba/Zr		Bloomer, Sherman H
36	Olivine	Ol	%	Bloomer, Sherman H		phenocrysts, <0.1 = trace
37	Plagioclase	Pl	%	Bloomer, Sherman H		phenocrysts
38	Clinopyroxene	Cpx	%	Bloomer, Sherman H		phenocrysts
39	Orthopyroxene	Opx	%	Bloomer, Sherman H		phenocrysts
40	Vesicle	Vesicle	%	Bloomer, Sherman H
41	Plagioclase	Pl	%	Bloomer, Sherman H		matrix
42	Clinopyroxene	Cpx	%	Bloomer, Sherman H		matrix
43	Olivine	Ol	%	Bloomer, Sherman H		matrix
44	Opaque minerals	Opaque	%	Bloomer, Sherman H		matrix
45	Orthopyroxene	Opx	%	Bloomer, Sherman H		matrix
46	Mesostasis	Mesostasis	%	Bloomer, Sherman H		matrix
47	Plagioclase	Pl	%	Bloomer, Sherman H		last-squares model
48	Olivine	Ol	%	Bloomer, Sherman H		last-squares model
49	Oxides	Oxides	%	Bloomer, Sherman H		last-squares model
50	Clinopyroxene	Cpx	%	Bloomer, Sherman H		last-squares model
51	Orthopyroxene	Opx	%	Bloomer, Sherman H		last-squares model
52	Liquid fraction	Liq	%	Bloomer, Sherman H
53	Sum	Sum	#	Bloomer, Sherman H		sum R**2

License:

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

Size:

926 data points

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