Characterization of deeply buried sandstones and their reservoir quality is paramount importance for exploring, developing, subsurface storage energy resources. High in commonly correlated with the occurrence grain coatings that inhibit quartz cementation. The development reliable models can predict relies on incorporating quantitative understanding these diagenetic processes. Hydrothermal expe...

In this study, we investigate phosphorus (P) and iron (Fe) cycling in sediments along a depth transect from within to well below the oxygen minimum zone (OMZ) in the northern Arabian Sea (Murray Ridge). Pore-water and solid-phase analyses show that authigenic formation of calcium phosphate minerals (Ca-P) is largely restricted to where the OMZ intersects the seafloor topography, likely due to h...

Magnesium (Mg) in natural waters plays a critical role governing carbonate mineral formation, dissolution, and diagenesis. Previous laboratory experiments show that Mg can strongly inhibit direct calcite precipitation as well aragonite to diagenetic transformation. Data from settings, however, suggest most Phanerozoic limestones has formed the shallow marine burial realm presence of ample Mg. T...

Vivianite, Fe3(PO4)2 · 8H2O, is a ferrous iron phosphate mineral which forms in waterlogged soils and sediments. The phosphorus (P) bound in its crystal lattice is considered to be immobilised because vivianite is stable under anoxic, reducing, sedimentary conditions. Thus, vivianite formation can make a major contribution to P retention during early diagenesis. Much remains unknown about vivia...

TEM and XRD techniques were used to study crystal growth characteristics of the fabric-forming phyllosilicates which developed in response to low-grade metamorphism and tectonic imbrication in part of the Southern Uplands thrust terrane. Prograde regional metamorphism, ranging from late diagenesis through the anchizone to the epizone, was accompanied by the development of a slaty cleavage which...