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):
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: 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):
# | 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