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Bloomer, Sherman H (1994): (Table 1) Chemical composition of segregations and groundmass seperates of ODP Leg 135 samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.793499, Supplement to: Bloomer, SH (1994): Origin of segregation vesicles in volcanic rocks from the Lau Basin, Leg 135. In: Hawkins, J; Parson, L; Allan, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 135, 615-623, https://doi.org/10.2973/odp.proc.sr.135.127.1994

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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):
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: Leg135 * 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: Leg135 * 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: Leg135 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 44.8 m cored; 0 m drilled; 37.9 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Sample code/labelSample labelBloomer, Sherman HDSDP/ODP/IODP sample designation
6Lithologic unit/sequenceUnitBloomer, Sherman H
7Sample commentSample commentBloomer, Sherman Hfill = segregation, matrix = groundmass matrix
8TypeTypeBloomer, Sherman H
9MassMassgBloomer, Sherman Hof filling, #1
10MassMassgBloomer, Sherman Hof filling, #2
11Silicon dioxideSiO2%Bloomer, Sherman H
12Titanium dioxideTiO2%Bloomer, Sherman H
13Aluminium oxideAl2O3%Bloomer, Sherman H
14Iron oxide, Fe2O3Fe2O3%Bloomer, Sherman H
15Manganese oxideMnO%Bloomer, Sherman H
16Magnesium oxideMgO%Bloomer, Sherman H
17Calcium oxideCaO%Bloomer, Sherman H
18Sodium oxideNa2O%Bloomer, Sherman H
19Potassium oxideK2O%Bloomer, Sherman H
20Phosphorus pentoxideP2O5%Bloomer, Sherman H
21Pseudonodosaria symmetricaP. symmetrica%Bloomer, Sherman H
22PhosphorusPmg/kgBloomer, Sherman H
23ZincZnmg/kgBloomer, Sherman H
24NickelNimg/kgBloomer, Sherman H
25ChromiumCrmg/kgBloomer, Sherman H
26VanadiumVmg/kgBloomer, Sherman H
27CopperCumg/kgBloomer, Sherman H
28ZirconiumZrmg/kgBloomer, Sherman H
29ScandiumScmg/kgBloomer, Sherman H
30YttriumYmg/kgBloomer, Sherman H
31StrontiumSrmg/kgBloomer, Sherman H
32BariumBamg/kgBloomer, Sherman H
33Titanium/Zirconium ratioTi/ZrBloomer, Sherman H
34Yttrium/Zirconium ratioY/ZrBloomer, Sherman H
35Barium/Zirconium ratioBa/ZrBloomer, Sherman H
36OlivineOl%Bloomer, Sherman Hphenocrysts, <0.1 = trace
37PlagioclasePl%Bloomer, Sherman Hphenocrysts
38ClinopyroxeneCpx%Bloomer, Sherman Hphenocrysts
39OrthopyroxeneOpx%Bloomer, Sherman Hphenocrysts
40VesicleVesicle%Bloomer, Sherman H
41PlagioclasePl%Bloomer, Sherman Hmatrix
42ClinopyroxeneCpx%Bloomer, Sherman Hmatrix
43OlivineOl%Bloomer, Sherman Hmatrix
44Opaque mineralsOpaque%Bloomer, Sherman Hmatrix
45OrthopyroxeneOpx%Bloomer, Sherman Hmatrix
46MesostasisMesostasis%Bloomer, Sherman Hmatrix
47PlagioclasePl%Bloomer, Sherman Hlast-squares model
48OlivineOl%Bloomer, Sherman Hlast-squares model
49OxidesOxides%Bloomer, Sherman Hlast-squares model
50ClinopyroxeneCpx%Bloomer, Sherman Hlast-squares model
51OrthopyroxeneOpx%Bloomer, Sherman Hlast-squares model
52Liquid fractionLiq%Bloomer, Sherman H
53SumSum#Bloomer, Sherman Hsum R**2
Size:
926 data points

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