Theia Mons
Large highland shield volcano on the planet Venus
22°42′N 281°00′E / 22.7°N 281.0°E / 22.7; 281.0[1]Theia Mons is a large highland shield volcano on the planet Venus. Located on Beta Regio, a large region of recent volcanic uplift due to a currently active mantle plume,[2] Theia Mons is situated at the junction of three branches of Devana Chasma, an extensive rift system.[3] It is named after Theia, a Titan from Greek mythology.[4]
Geology
Situated in a region of widespread tectonic activity, Theia Mons formed after rifting at Devana Chasma was initiated. Theia Mon's location suggests that its formation may be linked to an apparent triple junction of Devana Chasma.[5]
Theia Mons is surrounded by a large radial dike swarm and has four major groups of lava flows near its summit caldera. The oldest group of lava flows do not appear to originate from the caldera, and are partially obscured by younger generations of lava flows. A group of lava flows north of Theia Mons also do not appear to originate from its central caldera, and may have been sourced from an older caldera that was later destroyed by rifting at Devana Chasma. The longest lava flows from the central caldera exceed 700 kilometers in length, and the combined area of the lava flows is approximately 650,000 km2 (250,000 sq mi).[2]
See also
- Volcanism on Venus
- Devana Chasma
References
- ^ "Theia Mons". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program. (Center Latitude: 22.7°, Center Longitude: 281.0°)
- ^ a b Shimolina, A. S.; Ernst, R. E.; El Bilali, H. (2023). Lava Flows of Theia Mons Volcano, Beta Regio Plume Centre, Venus (PDF). 54th Lunar and Planetary Science Conference. The Woodlands, Texas and virtually. Bibcode:2023LPICo2806.1159S. 1159.
- ^ Senske, D. A.; Schaber, G. G.; Stofan, E.R. (1992). "Regional topographic rises on Venus: Geology of Western Eistla Regio and comparison to Beta Regio and Atla Regio". Journal of Geophysical Research. 97 (E8): 13395–13420. Bibcode:1992JGR....9713395S. doi:10.1029/92JE01167.
- ^ Carolynn Young, ed. (1990-08-01). The Magellan Venus Explorer' Guide. NASA.
- ^ Stofan, E. R.; Head, J. W.; Campbell, D. B.; Zisk, S. H.; Bogomolov, A. F.; Rzhiga, O. N.; Basilevsky, A. T.; Armand, N. (1989). "Geology of a Rift Zone on Venus: Beta Regio and Devana Chasma". Geological Society of America Bulletin. 101: 143–156. Bibcode:1989GSAB..101..143S. doi:10.1130/0016-7606(1989)101<0143:GOARZO>2.3.CO;2.
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