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Changes in Plate Motions Caused by Increases in Gravitational Potential Energy of Mountain Belts
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2022
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Source: Geochemistry, Geophysics, Geosystems, 23(10)
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Journal Title:Geochemistry, Geophysics, Geosystems
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Description:Reconstructions of motions of the Nazca, South American, and Indian plates record short-duration (≲10 Myr) variations in angular velocity, which enable a vector-based test of the hypothesis that mountain uplift can cause changes in plate motion. Reductions in velocity of Nazca and South America between ∼12 and 6 Ma coincide with a phase of rapid surface uplift in the Central Andes. Decrease in the rate of India's convergence with Eurasia between ∼20 and 10 Ma corresponds to an increase in gravitational potential energy per unit area (GPE) within Tibet, marked by a transition from crustal thickening to thinning. The vectorial test shows that, in each case, the only change in driving force capable of balancing the change in
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Source:Geochemistry, Geophysics, Geosystems, 23(10)
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DOI:
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ISSN:1525-2027;1525-2027;
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Rights Information:CC BY
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Compliance:Library
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