Journal ArticleDOI
Composite Graben Tectonics of Alba Patera on Mars
TLDR
The Alba Patera main graben zone is radial to the Tharsis bulge, indicating the importance of the tharsis-related peripheral rift tectonics.Abstract:
The Alba Patera main graben zone is radial to the Tharsis bulge, indicating the importance of the Tharsis bulge-related peripheral rift tectonics. The concentric grabens around the Alba Patera area are also partly caused by crustal bending due to the central load of the Alba Patera volcano. These two graben sets partly coincide forming composite structures. Both tectonic systems were still active after the last major volcanic lava extrusions took place. After this, the crater chain grabens, radial to the northernmost part of the Tharsis bulge were formed. These collapse craters were evidently caused by the late-tectonic forces due to the northern Tharsis and adjoining lava loads, resulting in flexural tension and activating previous faults.read more
Citations
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Stress models for Tharsis formation, Mars
Daniel Mège,Philippe Masson +1 more
TL;DR: A critical survey of most stress models for the formation of the tectonic structures in the Tharsis volcano-tectonic province on Mars and provides new constraints for further models is presented in this paper.
Journal ArticleDOI
Unveiling the origin of radial grabens on Alba Patera volcano by finite element modelling
TL;DR: In this paper, the influence of regional and local tectonics on the dike orientations on the volcano with Viking mosaic data and simulated plausible stress fields with finite element modeling.
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Gravity studies of the Tharsis area on Mars
Peter Janle,Ercan Erkul +1 more
TL;DR: The Tharsis rise on Mars with a diameter of about 8000 km and an elevation up to 10 km shows extensive volcanism and an extensional fracture system as mentioned in this paper, which can be explained by a heated upper mantle, a chemically modified upper mantle or a combination of these three processes.
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Circumferential graben and the structural evolution of Alba Mons, Mars
Teemu Öhman,Patrick J. McGovern +1 more
TL;DR: McGovern et al. as discussed by the authors used a wide selection of topographic datasets to characterize the fault throw variation on nine topographic transects across the circumferential graben in order to provide observational constraints for the different formation models, and to gain further insight into the evolution of Alba Mons.
Journal ArticleDOI
Magma chamber -related development of Alba Patera on Mars
Jouko Raitala,K. Kauhanen +1 more
TL;DR: In this paper, the formation of the central calderas of the Alba Patera summit area is proposed to have been caused by collapse(s) into relatively shallow and wide magma chamber(s).
References
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Journal ArticleDOI
Volcanism on Mars
Ronald Greeley,Paul D. Spudis +1 more
TL;DR: In situ chemical analyses of Martian soil by the Viking lander indicate mafic to ultramafic source rocks, consistent with both remote sensing data indicating the presence of pyroxene and olivine and with petrologic modeling which suggests that Martian lavas are iron-rich and ultrameric as mentioned in this paper.
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Some Martian volcanic features as viewed from the Viking orbiters
TL;DR: In this article, the results of some new observations on Martian volcanic features made from the Viking orbiters are presented, taking into account the shield of Olympus Mons, mass movement features along the basal scarp, the basal plains, the relative ages of Olympus, and grooved terrain.
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Volcanism on Mars
TL;DR: One of the earliest and most significant of the Mariner 9 results was the recognition of prominent volcanic features on Mars as discussed by the authors, and the volcanic features have a markedly asymmetric distribution.
Journal ArticleDOI
Thick shell tectonics on one-plate planets - Applications to Mars
TL;DR: In this paper, a theory for stress distribution in a self-gravitating elastic spherical shell overlying a strengthless fluid was developed for the one-plate planets of Mars.
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Structural analysis of lunar grabens and the shallow crustal structure of the Moon
TL;DR: In this article, the authors used a simple extension model for the formation of grabens and determined the thickness of the faulted layer, defined as the depth of intersection of the faults bounding a graben, represented a mechanical discontinuity in the lunar crust.