Donaldson, Colin H; Brown, Roy W (1977): Composition of chromian diopside megacryst in DSDP Leg 37 basalts (Table 2, 3) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.708792, Supplement to: Donaldson, CH; Brown, RW (1977): Refractory megacrysts and magnesium-rich melt inclusions within spinel in oceanic tholeiits: indicators of magma mixing and parental magma composition. Earth and Planetary Science Letters, 37(1), 81-89, https://doi.org/10.1016/0012-821X(77)90148-0
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Abstract:
Refractory megacrysts of olivine, plagioclase, chromian diopside and Cr-Al spinel, which were not in equilibrium with the host oceanic tholeiite on eruption, are present in samples from several dredge sites and DSDP drill sites in the Atlantic and Pacific Oceans. They have multiple origins: (1) cognate or accidental mantle fragments; (2) relict fragments from fractional crystallization of parental liquids considerably more primitive than oceanic tholeiite; and most commonly (3) the fractional crystallization products of such liquids mixed with oceanic tholeiite magma. Melt inclusions in chrome-spinel phenocrysts provide evidence for this postulated Mg- and Ca-rich magma which has counterparts in the Scottish Tertiary Province and in west Greenland.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 37.017700 * Median Longitude: -34.160233 * South-bound Latitude: 36.878700 * West-bound Longitude: -35.198700 * North-bound Latitude: 37.295700 * East-bound Longitude: -33.641000
Date/Time Start: 1974-06-17T00:00:00 * Date/Time End: 1974-07-18T00:00:00
Minimum Elevation: -3188.0 m * Maximum Elevation: -1806.0 m
Event(s):
37-332A * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1818.0 m * Penetration: 434.5 m * Recovery: 66.2 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 39 cores; 370.5 m cored; 0 m drilled; 17.9 % recovery
37-332B * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1806.0 m * Penetration: 721.5 m * Recovery: 122.9 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 582.5 m cored; 0 m drilled; 19.4 % recovery
37-335 * Latitude: 37.295700 * Longitude: -35.198700 * Date/Time: 1974-07-18T00:00:00 * Elevation: -3188.0 m * Penetration: 562 m * Recovery: 59 m * Location: North Atlantic * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 152 m cored; 0 m drilled; 38.8 % 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 | Donaldson, Colin H | DSDP/ODP/IODP sample designation | ||
| 6 | Lithology/composition/facies | Lithology | Donaldson, Colin H | |||
| 7 | Silicon dioxide | SiO2 | % | Donaldson, Colin H | ||
| 8 | Titanium dioxide | TiO2 | % | Donaldson, Colin H | ||
| 9 | Aluminium oxide | Al2O3 | % | Donaldson, Colin H | ||
| 10 | Aluminium oxide | Al2O3 | % | Donaldson, Colin H | of basalt | |
| 11 | Chromium(III) oxide | Cr2O3 | % | Donaldson, Colin H | ||
| 12 | Iron oxide, Fe2O3 | Fe2O3 | % | Donaldson, Colin H | ||
| 13 | Iron oxide, FeO | FeO | % | Donaldson, Colin H | ||
| 14 | Manganese oxide | MnO | % | Donaldson, Colin H | ||
| 15 | Magnesium oxide | MgO | % | Donaldson, Colin H | ||
| 16 | Calcium oxide | CaO | % | Donaldson, Colin H | ||
| 17 | Sodium oxide | Na2O | % | Donaldson, Colin H | ||
| 18 | Potassium oxide | K2O | % | Donaldson, Colin H | ||
| 19 | Magnesium number | Mg# | Donaldson, Colin H | |||
| 20 | Wollastonite | Wo | % | Donaldson, Colin H | ||
| 21 | Enstatite | En | % | Donaldson, Colin H | ||
| 22 | Ferrosilite | Fs | % | Donaldson, Colin H | ||
| 23 | Chromium | Cr | mg/kg | Donaldson, Colin H | of basalt |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
46 data points