Clays form on Earth by near-surface weathering, precipitation in water bodies within basins,
hydrothermal alteration (volcanic-or impact-induced), diagenesis, metamorphism, and …

Columbus crater in the Terra Sirenum region of the Martian southern highlands contains
light‐toned layered deposits with interbedded sulfate and phyllosilicate minerals, a rare …

Water activity is an important characteristic for describing unusual waters and is a
determinant of habitability for microorganisms. However, few empirical studies of water …

Cross crater is a 65 km impact crater, located in the Noachian highlands of the Terra
Sirenum region of Mars (30° S, 158° W), which hosts aluminum phyllosilicate deposits first …

Abstract The area of Meridiani Planum on Mars became of particular interest after the
detection of coarse-grained, gray hematite, which led to the choice of this region as final …

Substantial amounts of authigenic clay minerals can accumulate in terrestrial mudstones
where the following conditions are met: surface or pore waters are alkaline, aqueous silica …

The geochemistry of phosphorus (P) can usually be related to prevailing environmental
conditions. To investigate sedimentary P cycling mechanism and biogeochemical …

Phyllosilicates of the smectite group detected in Noachian and early Hesperian terrains on
Mars have been hypothesized to form under neutral to alkaline conditions. These pH …

Regional-scale extreme acid brines in southern Western Australia are an example of sulfur-
rich end-member continental waters and are amongst the most physically and chemically …

Abundant resources and efforts have been employed in the search for life on Mars.
Satellites, landers, and rovers have tested atmospheric gases, general sediment and rock …