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On the relative importance of thermal and chemical buoyancy in impact-induced melting on Mars

Ruedas, T. and Breuer, D. (2017) On the relative importance of thermal and chemical buoyancy in impact-induced melting on Mars. 48th Lunar and Planetary Science Conference, 20-24 Mar 2017, The Woodlands, TX, USA.

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Official URL: http://www.hou.usra.edu/meetings/lpsc2017/pdf/1913.pdf


Convection in planetary mantles is driven by buoyancy that results from density variations, which may have thermal or compositional causes. We study the relative importance of the thermal and compositional contributions to the buoyancy of melt-induced density heterogeneities in Mars by coupling two-dimensional, fully dynamical convection models with a detailed model of the mineralogy and material properties of martian peridotite. The main focus lies on the anomalies created by giant impacts, which lead to particularly intense, high-degree melting that may reach deeper than the regular global asthenospheric melting zone. We investigate the differences in the evolutions of models with only thermal and with both thermal and compositional buoyancy for impacts of different sizes; the compositional aspect has been neglected in most previous studies.

Item URL in elib:https://elib.dlr.de/111194/
Document Type:Conference or Workshop Item (Poster)
Title:On the relative importance of thermal and chemical buoyancy in impact-induced melting on Mars
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ruedas, T.thomas.ruedas (at) dlr.dehttps://orcid.org/0000-0002-7739-1412
Breuer, D.doris.breuer (at) dlr.deUNSPECIFIED
Date:March 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Impacts, Mars, Mantle convection
Event Title:48th Lunar and Planetary Science Conference
Event Location:The Woodlands, TX, USA
Event Type:international Conference
Event Dates:20-24 Mar 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Ruedas Gomez, Thomas
Deposited On:11 Apr 2017 12:30
Last Modified:31 Jul 2019 20:08

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