Dietrich, Volker; Emmermann, Rolf; Keller, Jörg; Puchelt, Harald (1977): Geochemistry of the basalts from DSDP Leg 42A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.708737, Supplement to: Dietrich, V et al. (1977): Tholeiitic basalts from the Tyrrhenian sea floor. Earth and Planetary Science Letters, (36(2), 285-296, https://doi.org/10.1016/0012-821X(77)90211-4
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Abstract:
During DSDP Leg 42A, drilling at site 373A in the central Tyrrhenian Sea penetrated Miocene basaltic basement for 190 m and recovered basalt from up to 450 m below the sea floor. Despite mineralogical and chemical alteration due to hydrothermal processes under the high heat flow regime in the Tyrrhenian marginal basin, petrological analogies to high-Al abyssal basalts can be traced.
Two interlayered basalt groups have been recognized: (1) the lower-Ti group (core 5/1-2, core 7, 10), and (2) the higher-Ti group (core 5/3, core 6, core 11, core 12 and outer barrel), respectively.
We consider a distinction of two magma types: a more primitive magma leading to the plagioclase-bearing, lower-Ti basalts with affinities to high-Al abyssal tholeiites and a more differentiated magma leading to basalts with higher Ti.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 39.728000 * Longitude: 12.992700
Date/Time Start: 1975-04-27T00:00:00 * Date/Time End: 1975-04-27T00:00:00
Event(s):
42-373A * Latitude: 39.728000 * Longitude: 12.992700 * Date/Time: 1975-04-27T00:00:00 * Elevation: -3517.0 m * Penetration: 457.5 m * Recovery: 30 m * Location: Mediterranean Sea/BASIN * Campaign: Leg42 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 104.5 m cored; 9.5 m drilled; 28.7 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Dietrich, V; Emmermann, R; Keller, J et al. (1977): (Table 2) Chemical composition of the DSDP Hole 42-373A basalts. https://doi.org/10.1594/PANGAEA.708736
- Dietrich, V; Emmermann, R; Keller, J et al. (1977): (Table 1) Na-amphinole compostion from DSDP 42-373A samples. https://doi.org/10.1594/PANGAEA.708734