Changes in Plate Motions Caused by Increases in Gravitational Potential Energy of Mountain Belts

England, Philip; Molnar, Peter

doi:10.1029/2022gc010389

i

Changes in Plate Motions Caused by Increases in Gravitational Potential Energy of Mountain Belts

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2022
By England, Philip ; Molnar, Peter

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Journal Title:

Geochemistry, Geophysics, Geosystems
Personal Author:

England, Philip ; Molnar, Peter
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
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
Keywords:

Geochemistry And Petrology Geophysics Geochemistry And Petrology Geochemistry And Petrology
Source:

Geochemistry, Geophysics, Geosystems, 23(10)
DOI:

https://doi.org/10.1029/2022gc010389
ISSN:

1525-2027 ; 1525-2027
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

urn:sha256:54d874db11aea9daa6e7008882bb821ce62daa9aee478516f2f11bbde384a716
Download URL:

https://repository.library.noaa.gov/view/noaa/53077/noaa_53077_DS1.pdf
File Type:

[PDF - 2.16 MB ]

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