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Earth's Gravity Field: Relation to Global Tectonics.

W M Kaula

    Science (New York, N.Y.)
    |September 4, 1970
    PubMed
    Summary
    This summary is machine-generated.

    An improved gravity field model reveals that ocean rises, trenches, and island arcs represent mass excesses. Conversely, ocean basins, glaciated areas, and the Alpide belt are mass deficiencies, linked to lithospheric behavior and asthenospheric flow.

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    Area of Science:

    • Geophysics
    • Earth Sciences
    • Gravimetry

    Background:

    • Understanding Earth's gravity field is crucial for interpreting geological structures.
    • Previous models may not fully capture the relationship between surface features and subsurface mass distribution.

    Purpose of the Study:

    • To present an improved solution for the Earth's gravity field.
    • To correlate geological features with mass excesses and deficiencies.

    Main Methods:

    • Analysis of gravity field data.
    • Interpretation of geological features such as ocean rises, trenches, island arcs, ocean basins, and glacial areas.

    Main Results:

    • Ocean rises, trenches, and island arcs are identified as significant mass excesses.

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  • Ocean basins, areas of recent glaciation, and the Asian Alpide belt are characterized as mass deficiencies.
  • These mass variations are largely interpretable through the varying behavior of the lithosphere responding to asthenospheric flow.

    • Conclusions:

    • The improved gravity field solution provides a new perspective on Earth's subsurface mass distribution.
    • Lithospheric response to asthenospheric flow is a key factor in explaining observed gravity anomalies and geological features.