Johnson, Kevin T M; Fisk, Martin R; Naslund, Howard Richard (1995): Geochemistry of silicate melt inclusions from ODP Holes 137-504B and 140-504B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.805934, Supplement to: Johnson, KTM et al. (1995): Geochemical characteristics of refractory silicate melt inclusions from Leg 140 diabases. In: Erzinger, J; Becker, K; Dick, HJB; Stokking, LB (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 137, 131-139, https://doi.org/10.2973/odp.proc.sr.137140.004.1995
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Abstract:
Geochemical data from plagioclase-hosted silicate melt inclusions from Leg 140, Hole 504B diabase dikes are reported. Hand-picked plagioclase grains were heated to 1260°-1280°C to remelt the glass inclusions and to infer trapping temperatures. The samples were then polished to expose the inclusions, which were analyzed by electron and ion microprobes. Inclusion compositions are mainly in equilibrium with the host plagioclase and are more depleted in incompatible elements than the host rock. Simple crystal-liquid equilibrium calculations show that the melt inclusions could have been in equilibrium with depleted abyssal peridotite diopsides, whereas whole-rock basalt compositions generally could not have been. The melt inclusions are significantly more depleted than normal (N-type) mid-ocean-ridge basalt (MORB) and are consistent with being produced by 8%-16% incremental or open-system melting with 2% residual porosity in the peridotite source. These magmas were formed during pressure-release melting of the mantle over a range of depths between 30 and 15 km.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 1.226900 * Longitude: -83.730300
Date/Time Start: 1991-04-07T13:10:00 * Date/Time End: 1991-11-12T04:10:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Johnson, KTM; Fisk, MR; Naslund, HR (1995): (Table 2) Major element analyses of silicate melt inclusions in plagioclase from ODP Holes 137-504B and 140-504B diabase. https://doi.org/10.1594/PANGAEA.805931
- Johnson, KTM; Fisk, MR; Naslund, HR (1995): (Table 3) Trace element analyses of silicate melt inclusions in plagioclase from ODP Holes 137-504B and 140-504B diabase. https://doi.org/10.1594/PANGAEA.805932
- Johnson, KTM; Fisk, MR; Naslund, HR (1995): (Table 4) Magnesium numbers in melt inclusions in plagiopclase from ODP Holes 137-504B and 140-504B diabase. https://doi.org/10.1594/PANGAEA.805933