Are active volcanoes on Venus the source of the trace elements of phosphine found above the clouds in our sister planet? One new study by Truong & Lunine from Cornell suggests it might well be!!
https://arxiv.org/ftp/arxiv/papers/2009/2009.11904.pdf

In this scenario, phosphine is not pointing to the existence of exotic life on Venus, but thriving geologic activity on the planet, since a fairly high rate of basaltic volcanism is required...although apparently not a too high rate...

These volcanoes would need to pump ~30 billion kgs of phosphides into the Venusian atmosphere each year to fulfill the 20ppb signal requirement detected by the JCMT and ALMA, which the researchers estimate is ~2-3% of the total phosphorus content!!

Interesting studies to come!!