The volcano rises above the flat highlands of Imdr Regio, an igneous province, to a height of 2.5 km (1.6 mi), and is approximately 250 km in diameter. It rises approximately 3.6 km above the mean planetary radius. Lava flows originating from the volcano have traveled in all directions, reaching as far as 550 km. The Olapa Chasma, a 1,300-km-long rift system, crosses the volcano in a northwest–southeast direction.[2]
The volcano features a 45-km-wide, flat-topped summit at its center. A cluster of overlapping calderas between 14 and 17 km in diameter is centered at the summit. To the northeast of the caldera cluster is a dome-shaped feature. The flat-topped summit may be explained by flank collapses due to tectonic instability as it is situated within the Olapa Chasma rift. These flank collapses altered the topography of the volcano. Young summit lava flows began to cover the affected ares, eventually burying the collapse area in new flows that reconstructed the flank.[2]
Activityedit
There are claims by scientists that Idunn Mons is volcanically active or was active recently, although no eruptions have been directly observed.[2] Volcanism on Venus is not well-studied, but the lack of impact craters and discovery of phosphine in the chemical composition of its atmosphere suggest recent or ongoing volcanic activity.[3]
Recent lava flows have buried evidence of rift fractures and lateral collapse, and the lack of erosion suggest young eruptive activity. Along the eastern flank are possible collapse scars and amphitheater-like structures that may represent parasitic cones. Previous studies have dated the lava flows at 2.5 million to 250,000 years old. However, a 2021 study published by the American Astronomical Society suggests the last eruption of Idunn Mons may have occurred from within the last 10,000 years to as recent as several years ago.[4]
^"Idunn Mons". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
^ abcLópez, Iván; D'Incecco, Piero; Filiberto, Justin; Komatsu, Goro (2022). "The volcanology of Idunn Mons, Venus: The complex evolution of a possible active volcano". Journal of Volcanology and Geothermal Research. 421 (107428). Elsevier: 107428. doi:10.1016/j.jvolgeores.2021.107428. S2CID 244085450.
^Choi, Charles Q. (9 December 2021). "Are volcanoes erupting on Venus?". Space.com. Retrieved 22 April 2022.
^D'Incecco, P.; Filiberto, J.; López, I.; Gorinov, D. A.; Komatsu, G. (2021). "Idunn Mons: Evidence for Ongoing Volcano-tectonic Activity and Atmospheric Implications on Venus". The Planetary Science Journal. 2 (5). American Astronomical Society: 215. doi:10.3847/PSJ/ac2258. S2CID 240068859.
External linksedit
PIA13001: Surface Warmth on a Venus Volcano
April 12, 2024
idunn, mons, shield, volcano, planet, venus, named, after, iðunn, goddess, norse, mythology, feature, typeshield, volcanocoordinates46, diameter250, peak2, above, mean, eponymiðunnclass, notpageimage, location, venusian, surface, contents, structure, activity,. Idunn Mons is a shield volcano on the planet Venus It is named after Idunn a goddess in Norse mythology Idunn MonsFeature typeShield volcanoCoordinates46 30 S 214 30 E 46 5 S 214 5 E 46 5 214 5 1 Diameter250 km 160 mi Peak2 5 km 1 6 mi 8 202 1 ft 2 500 0 m 3 6 km 2 2 mi 11 811 ft 3 600 m above mean EponymIdunnclass notpageimage Idunn Mons location on Venusian surface Contents 1 Structure 2 Activity 3 See also 4 References 5 External linksStructure editThe volcano rises above the flat highlands of Imdr Regio an igneous province to a height of 2 5 km 1 6 mi and is approximately 250 km in diameter It rises approximately 3 6 km above the mean planetary radius Lava flows originating from the volcano have traveled in all directions reaching as far as 550 km The Olapa Chasma a 1 300 km long rift system crosses the volcano in a northwest southeast direction 2 The volcano features a 45 km wide flat topped summit at its center A cluster of overlapping calderas between 14 and 17 km in diameter is centered at the summit To the northeast of the caldera cluster is a dome shaped feature The flat topped summit may be explained by flank collapses due to tectonic instability as it is situated within the Olapa Chasma rift These flank collapses altered the topography of the volcano Young summit lava flows began to cover the affected ares eventually burying the collapse area in new flows that reconstructed the flank 2 Activity editThere are claims by scientists that Idunn Mons is volcanically active or was active recently although no eruptions have been directly observed 2 Volcanism on Venus is not well studied but the lack of impact craters and discovery of phosphine in the chemical composition of its atmosphere suggest recent or ongoing volcanic activity 3 Recent lava flows have buried evidence of rift fractures and lateral collapse and the lack of erosion suggest young eruptive activity Along the eastern flank are possible collapse scars and amphitheater like structures that may represent parasitic cones Previous studies have dated the lava flows at 2 5 million to 250 000 years old However a 2021 study published by the American Astronomical Society suggests the last eruption of Idunn Mons may have occurred from within the last 10 000 years to as recent as several years ago 4 See also editVolcanism on VenusReferences edit Idunn Mons Gazetteer of Planetary Nomenclature USGS Astrogeology Research Program a b c Lopez Ivan D Incecco Piero Filiberto Justin Komatsu Goro 2022 The volcanology of Idunn Mons Venus The complex evolution of a possible active volcano Journal of Volcanology and Geothermal Research 421 107428 Elsevier 107428 doi 10 1016 j jvolgeores 2021 107428 S2CID 244085450 Choi Charles Q 9 December 2021 Are volcanoes erupting on Venus Space com Retrieved 22 April 2022 D Incecco P Filiberto J Lopez I Gorinov D A Komatsu G 2021 Idunn Mons Evidence for Ongoing Volcano tectonic Activity and Atmospheric Implications on Venus The Planetary Science Journal 2 5 American Astronomical Society 215 doi 10 3847 PSJ ac2258 S2CID 240068859 External links editPIA13001 Surface Warmth on a Venus Volcano Retrieved from https en wikipedia org w index php title Idunn Mons amp oldid 1169977681, wikipedia, wiki, book, books, library,
