A recent study using in situ crystallographic mapping has shed new light on the precipitation and timing of sulfate minerals in Jezero crater, Mars. The research team used a technique called PIXL to analyze samples from three outcrops: Hogwallow Flats, Wildcat Ridge, and Berry Hollow.
The analysis revealed that the sulfate minerals formed through a process known as diagenesis, which involves the alteration of existing rocks under the influence of water and minerals. The researchers found that the fracture network in these rocks played a crucial role in controlling the distribution of sulfates.
Specifically, they discovered that the fracture network was responsible for the formation of veins and vugs containing sulfate-rich minerals. The team also analyzed the composition and mineral phases of these veins and found that they were composed primarily of gypsum and halite.
The study provides valuable insights into the geological history of Jezero crater and sheds light on the processes that shaped this ancient Martian environment.
Source: https://www.science.org/doi/10.1126/sciadv.adt3048