Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10489918" target="_blank" >RIV/00216208:11320/24:10489918 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Btre3Ujmeg" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Btre3Ujmeg</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024GL110748" target="_blank" >10.1029/2024GL110748</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data
Popis výsledku v původním jazyce
The crustal structure of Mercury's large impact basins provides valuable insights into the planet's geological history. For a warm crust, a post-impact basin structure will viscously relax with inward flow of crustal materials toward the basin center. This effect drastically diminishes the crustal thickness contrasts and associated Bouguer gravity contrasts between the basin center and its surroundings. Here, we analyze Bouguer contrasts of 36 basins (diameter >300 km) located in the northern hemisphere as a proxy for viscoelastic relaxation. Thermal evolution models, assuming the present 3:2 spin-orbit configuration, are used to predict crustal temperatures. Our analysis reveals that the expected correlation between zones of warm crust and low Bouguer contrast from relaxation is not observed in the available data. This suggests that crustal temperatures have changed in the past, potentially due to a change in Mercury's orbit or to a major volcanic event associated with smooth plain formation.
Název v anglickém jazyce
Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data
Popis výsledku anglicky
The crustal structure of Mercury's large impact basins provides valuable insights into the planet's geological history. For a warm crust, a post-impact basin structure will viscously relax with inward flow of crustal materials toward the basin center. This effect drastically diminishes the crustal thickness contrasts and associated Bouguer gravity contrasts between the basin center and its surroundings. Here, we analyze Bouguer contrasts of 36 basins (diameter >300 km) located in the northern hemisphere as a proxy for viscoelastic relaxation. Thermal evolution models, assuming the present 3:2 spin-orbit configuration, are used to predict crustal temperatures. Our analysis reveals that the expected correlation between zones of warm crust and low Bouguer contrast from relaxation is not observed in the available data. This suggests that crustal temperatures have changed in the past, potentially due to a change in Mercury's orbit or to a major volcanic event associated with smooth plain formation.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10500 - Earth and related environmental sciences
Návaznosti výsledku
Projekt
<a href="/cs/project/GN23-06513I" target="_blank" >GN23-06513I: Slapová odezva terestrických (exo)planet a binárních asteroidů</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2024
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
1944-8007
Svazek periodika
51
Číslo periodika v rámci svazku
22
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
10
Strana od-do
e2024GL110748
Kód UT WoS článku
001369518400001
EID výsledku v databázi Scopus
2-s2.0-85209811414