New research led by Universities Space Research Association (USRA) and published today in Science Advances shows that lava flows on Venus may be only a few years old, suggesting that Venus could be volcanically active today — making it the only planet in our solar system, other than Earth, with recent eruptions.
“If Venus is indeed active today, it would make a great place to visit to better understand the interiors of planets,” says Dr. Justin Filiberto, the study’s lead author and a USRA staff scientist at the Lunar and Planetary Institute (LPI). “For example, we could study how planets cool and why the Earth and Venus have active volcanism, but Mars does not. Future missions should be able to see these flows and changes in the surface and provide concrete evidence of its activity.”
Radar imaging from NASA’s Magellan spacecraft in the early 1990s revealed Venus, our neighboring planet, to be a world of volcanoes and extensive lava flows. In the 2000s, the European Space Agency’s (ESA’s) Venus Express orbiter shed new light on volcanism on Venus by measuring the amount of infrared light emitted from part of Venus’ surface (during its nighttime). These new data allowed scientists to identify fresh versus altered lava flows on the surface of Venus. However, until recently, the ages of lava eruptions and volcanoes on Venus were not well known because the alteration rate of fresh lava was not well constrained.
Dr. Filiberto and his colleagues recreated Venus’ hot caustic atmosphere in the laboratory to investigate how the observed Venusian minerals react and change over time. Their experimental results showed that once erupted onto the surface, an abundant mineral in basalt — olivine — reacts rapidly with the atmosphere and within weeks becomes coated with the iron oxide minerals magnetite and hematite. They further found that the Venus Express observations of this change in mineralogy would only take a few years to occur. Thus, the new results by Filiberto and coauthors suggest that these lava flows on Venus are very young, which would imply that Venus does indeed have active volcanoes.
Reference:
“Present-Day Volcanism on Venus as Evidenced from Weathering Rates of Olivine,” J. Filiberto, D. Trang, A. H. Treiman & M. Gilmore, 2020 Jan. 3, Science Advances [https://advances.sciencemag.org/content/6/1/eaax7445].
About USRA:
Founded in 1969, under the auspices of the National Academy of Sciences at the request of the U.S. Government, the Universities Space Research Association (USRA, https://www.usra.edu) is a nonprofit corporation chartered to advance space-related science, technology and engineering. USRA operates scientific institutes and facilities, and conducts other major research and educational programs, under Federal funding. USRA engages the university community and employs in-house scientific leadership, innovative research and development, and project management expertise.
About LPI:
The Lunar and Planetary Institute (LPI, https://www.lpi.usra.edu), operated by Universities Space Research Association, was established during the Apollo program to foster international collaboration and to serve as a repository for information gathered during the early years of the space program. Today, the LPI is an intellectual leader in lunar and planetary science. The Institute serves as a scientific forum attracting world-class visiting scientists, postdoctoral fellows, students, and resident experts; supports and serves the research community through newsletters, meetings, and other activities; collects and disseminates planetary data while facilitating the community’s access to NASA science; and engages and excites, and educates the public about space science and invests in the development of future generations of explorers. The research carried out at the LPI supports NASA’s efforts to explore the solar system.
