Dmitriev, Leonid V; Sobolev, Alexander V; Suschevskaya, N M; Zapunny, S A (1985): (Table 2) Geochemistry and petrograhy of DSDP Leg 82 Holes and MAPCO cruise of Jean Charcot in the Mid-Atlantic Ridge area [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.806177, Supplement to: Dmitriev, LV et al. (1985): Abyssal glasses, petrologic mapping of the oceanic floor and “geochemical Leg” 82. In: Bougault, H; Cande, SC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 82, 509-518, https://doi.org/10.2973/dsdp.proc.82.127.1985
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Abstract:
The compositions of abyssal glasses obtained on Leg 82 of the awGlomar Challenger and the MAPCO cruise of Jean Charcot have been investigated. Two main compositional groups of Atlantic glasses (A1 and A2) that are separated in space and time were identified. The distribution of these groups in the studied area allowed mapping of the transition zone from A1 to A2 between 30-35°N MAR. We infer that the compositional groups of abyssal glasses of the Atlantic and other oceans reflect the depth of separation of primary melts from the oceanic mantle. Specifically, the primary melt of Group A1 separates from the mantle at a depth of 30-60 km (spinel-peridotite facies) and those for Group A2 from a depth of 15-30 km (plagioclase-peridotite facies). Modifications of dynamic models of the ocean lithosphere are discussed.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 33.365016 * Median Longitude: -40.255840 * South-bound Latitude: 27.766667 * West-bound Longitude: -44.083333 * North-bound Latitude: 39.783333 * East-bound Longitude: -29.650000
Date/Time Start: 1981-09-22T00:00:00 * Date/Time End: 1981-10-28T00:00:00
Minimum Elevation: -4230.0 m * Maximum Elevation: -1800.0 m
Event(s):
82-556 * Latitude: 38.939700 * Longitude: -34.685300 * Date/Time: 1981-09-22T00:00:00 * Elevation: -3672.0 m * Penetration: 639 m * Recovery: 80.9 m * Location: North Atlantic/RIDGE * Campaign: Leg82 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 166 m cored; 0 m drilled; 48.7 % recovery
82-558 * Latitude: 37.770000 * Longitude: -37.343500 * Date/Time: 1981-10-03T00:00:00 * Elevation: -3754.0 m * Penetration: 561.5 m * Recovery: 237.8 m * Location: North Atlantic/RIDGE * Campaign: Leg82 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 394.5 m cored; 0 m drilled; 60.3 % recovery
82-559 * Latitude: 35.124200 * Longitude: -40.916700 * Date/Time: 1981-10-14T00:00:00 * Elevation: -2754.0 m * Penetration: 301 m * Recovery: 23.5 m * Location: North Atlantic Ocean * Campaign: Leg82 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 63 m cored; 0 m drilled; 37.3 % 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 | Dmitriev, Leonid V | DSDP/ODP/IODP sample designation | ||
| 6 | Sample, optional label/labor no | Lab no | Dmitriev, Leonid V | |||
| 7 | Piece | Piece | Dmitriev, Leonid V | |||
| 8 | Age, minimum/young | Age min | ka | Dmitriev, Leonid V | ||
| 9 | Age, maximum/old | Age max | ka | Dmitriev, Leonid V | ||
| 10 | AGE | Age | ka BP | Geocode | ||
| 11 | Description | Description | Dmitriev, Leonid V | |||
| 12 | Replicates | Repl | # | Dmitriev, Leonid V | ||
| 13 | Silicon dioxide | SiO2 | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 14 | Silicon dioxide, standard deviation | SiO2 std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 15 | Titanium dioxide | TiO2 | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 16 | Titanium dioxide, standard deviation | TiO2 std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 17 | Aluminium oxide | Al2O3 | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 18 | Aluminium oxide, standard deviation | Al2O3 std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 19 | Iron oxide, FeO | FeO | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 20 | Iron oxide, FeO, standard deviation | FeO std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 21 | Magnesium oxide | MgO | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 22 | Magnesium oxide, standard deviation | MgO std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 23 | Calcium oxide | CaO | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 24 | Calcium oxide, standard deviation | CaO std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 25 | Sodium oxide | Na2O | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 26 | Sodium oxide, standard deviation | Na2O std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 27 | Potassium oxide | K2O | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 28 | Potassium oxide, standard deviation | K2O std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 29 | Total | Total | % | Dmitriev, Leonid V | Electron microprobe (EMP) | |
| 30 | Standard deviation | Std dev | ± | Dmitriev, Leonid V | Electron microprobe (EMP) | Total |
| 31 | Parameter | Parameter | arbitrary units | Dmitriev, Leonid V | Calculated, see reference(s) | 8-component discriminant |
| 32 | Standard deviation | Std dev | ± | Dmitriev, Leonid V | Calculated, see reference(s) | 8-component discriminant |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
567 data points