Fisk, Martin R; Howard, Katherine J (1990): Geochemical analyses of secondary minerals from ODP Leg 115 basalts (Tables 1+2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.755472, Supplement to: Fisk, MR; Howard, KJ (1990): Chemistry of basalt alteration from Leg 115. In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 791-793, https://doi.org/10.2973/odp.proc.sr.115.125.1990
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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: Leg115 * 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: Leg115 * 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: Leg115 * 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 | Comment |
|---|---|---|---|---|---|---|
| 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