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Relative sea level and coastal vertical movements in relation with volcano-tectonic processes in Mayotte | | Julien Gargani
; | | Date: |
1 Jan 2023 | | Abstract: | During the last 10 kyr, significant subsidence and uplift occurred on Mayotte
Island in the Comoros archipelago, but the role of volcanic processes in
Holocene vertical movements has been neglected. Here, we show that an abrupt
subsidence of 10 m occurred 9.3 kyr ago and then an uplift of the same
amplitude occurred at a rate of 9 mm/yr from 8.1 kyr to 7 kyr ago, and we
compare the relative sea level of Mayotte with a reference sea level curve.
Using a modeling approach, this study shows that an increase and a decrease in
pressure in a deep magma reservoir was responsible for the ~10 m subsidence and
the 10 m uplift, whereas the loading by new volcanic edifices has caused the
subsidence that has occurred during the past 6.1 kyr. The surface movement was
caused by pulses from the deep mantle that were probably related to superplume
activity. | | Source: | arXiv, 2301.00417 | | Services: | Forum | Review | PDF | Favorites | |
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