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Dmitriev, Yuri I (1982): Petrology and origin of basalts at DSDP Hole 66-487 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817781, Supplement to: Dmitriev, YI (1982): Petrology and origin of basalts of the Middle America Trench, southern Mexico Transect. In: Watkins, JS; Casey Moore, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 66, 703-710, https://doi.org/10.2973/dsdp.proc.66.133.1982

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Abstract:
The volcanism of Central America, according to current theory (Pichler and Weyl, 1973; Stoiber and Carr, 1974; Hey, 1977), is related to the subduction of the Cocos Plate under the North American lithospheric plate and the melting of ocean crust material in the subduction zone (Green and Ringwood, 1968; Dickinson, 1970, Fitton, 1971).
Since Cocos Plate subduction occurs at the rate of more than 7 cm/y. (Hey et al., 1977), basalts underlying upper Miocene sediments of the Middle America Trench outer slope, penetrated in Hole 487 (Fig. 1) during Leg 66 (Moore et al., 1979), should have formed far from their present position if current theory is accurate.
Present manifestations of basaltic magmatism in adjacent areas of the Pacific derive from the axial part of the East Pacific Rise, the Galapagos spreading center, and transform fracture zones.
The question arises: Are there analogs of the Middle America Trench basalts among magmatic cock associated with these modern features, or do the trench basalts have some other origin?
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 15.853500 * Longitude: -99.175300
Date/Time Start: 1979-03-24T00:00:00 * Date/Time End: 1979-03-24T00:00:00
Event(s):
66-487 * Latitude: 15.853500 * Longitude: -99.175300 * Date/Time: 1979-03-24T00:00:00 * Elevation: -4764.0 m * Penetration: 190.5 m * Recovery: 119.6 m * Location: North Pacific/TRENCH * Campaign: Leg66 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 180.5 m cored; 9.5 m drilled; 66.3 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Dmitriev, YI (1982): (Table 1) Modal composition of basalts at DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817774
  2. Dmitriev, YI (1982): (Table 4) Olivines in basalts at DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817777
  3. Dmitriev, YI (1982): (Table 5) Titanomagnetite in basalts DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817778
  4. Dmitriev, YI (1982): (Table 3) Clinopyroxenes in basalts at DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817776
  5. Dmitriev, YI (1982): (Table 2) Plagioclase in basalts at DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817775
  6. Dmitriev, YI (1982): (Table 6) Spinels in basalts at DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817779
  7. Dmitriev, YI (1982): (Table 7) Chemical composition of basalts at DSDP Hole 66-487. https://doi.org/10.1594/PANGAEA.817780