Fig. 2: In situ aragonite crystals from 6429 m below sea level from the YK17-14 Leg 2 cruise (6K#1507-R14).
From: Hadal aragonite records venting of stagnant paleoseawater in the hydrated forearc mantle
a Slice of serpentinite consisting of highly brecciated serpentine that is cemented by aragonite. b Euhedral aragonite in serpentine fractures, which implies in situ aragonite growth. c Mineral-phase map created from an elemental map using k-means clustering. Ol = olivine; Srp = serpentine; Spl = spinel; Arg = aragonite. d Three-dimensional distribution of clasts (serpentine and olivine) in an aragonite vein (total volume: 1.13 mm × 0.90 mm × 0.89 mm). Photomicrograph (e) and back-scattered electron image (f) of serpentine mesh texture, which consists of porous brown serpentine mesh cores (b-Srp) and non-porous white serpentine mesh rims (w-Srp). g FIB–SEM image showing the porosity contrast between the serpentine mesh core and rim.
