Mengel, K; Hoefs, Jochen (1990): Oxygen isotope ratios amd Li concentrations in spilitized basaltic rocks of DSDP Hole 83-504B (Table 5) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.723142, Supplement to: Mengel, K; Hoefs, J (1990): Li-d18O-SiO2 systematics in volcanic rocks and mafic lower crustal granulite xenoliths. Earth and Planetary Science Letters, 101(1), 42-53, https://doi.org/10.1016/0012-821X(90)90122-E
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Abstract:
Li-delta18O-SiO2 relationships have been examined for suites of spilitized basaltic rocks (DSDP 504B; Xigaze Ophiolite; Blanco Fracture Zone; Greater Caucasus; Rhenohercynian Fold Belt) and intra-plate evolved tholeiites (Northern Hessian Depression and Vogelsberg, W Germany; Mount Falla, Transantarctic Mountains). Relative to unaltered MORB and intra-plate primary olivine tholeiites, both the spilitic rocks and the evolved tholeiites are characterized by Li and 18O enrichment. For the spilitic rocks, Li and 18O enrichment is accompanied by a loss of SiO2 as a result of seawater hydrothermal alteration, whereas the evolved tholeiites have gained SiO2, Li and 18O from fractionation of mafic phases and assimilation of crustal rocks.
On Li vs. SiO2 and delta18O vs. SiO2 diagrams, the two rock groups plot largely in distinct fields, suggesting the possibility of so distinguishing between such lithologies in the ancient rock record. Mafic granulite xenoliths from the Northern Hessian Depression have elevated Li and 18O abundances at low SiO2 contents. Even after correction for extraction of felsic components, their Li-delta18O-SiO2 signatures plot within the field of spilitic protoliths, suggesting that the lower crust in this region contains relics of spilitic rocks from a former oceanic crust.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 1.227200 * Longitude: -83.730200
Date/Time Start: 1981-11-22T00:00:00 * Date/Time End: 1982-01-02T00:00:00
Minimum DEPTH, sediment/rock: 891.82 m * Maximum DEPTH, sediment/rock: 1296.55 m
Event(s):
83-504B * Latitude: 1.227200 * Longitude: -83.730200 * Date/Time Start: 1981-11-22T00:00:00 * Date/Time End: 1982-01-02T00:00:00 * Elevation: -3460.0 m * Penetration: 1350 m * Recovery: 107.7 m * Campaign: Leg83 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: Leg 83 of DSDP was devoted entirely to coring and experiments in Hole 504B, the deepest borehole to date into the oceanic crust. Hole 504B now extends over a kilometer into basement, nearly twice as far as any other DSDP hole, and it is the only DSDP hole to have clearly penetrated into the intrusive sheeted dikes that underlie the extrusive pillow lavas of the upper oceanic crust. At Hole 504B, Leg 83 continued an ongoing DSDP effort that began during Legs 68, 69, and 70 in 1979, and also included part of Leg 92 in 1983. 71 cores; 514 m cored; 0 m drilled; 21 % recovery
Comment:
For SiO2 data see Emmermann (1985) dataset: doi:10.1594/PANGAEA.262215
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Mengel, K | DSDP/ODP/IODP sample designation | ||
| 2 | Sample comment | Sample comment | Mengel, K | |||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | δ18O | δ18O | ‰ | Mengel, K | Isotope ratio mass spectrometry | SMOW |
| 5 | Lithium | Li | mg/kg | Mengel, K | Atomic absorption spectrometry (AAS), Perkin-Elmer |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
52 data points