▪ Abstract The recent recognition of a potentially vast, unexplored hot microbial biosphere
associated with active volcanism along the global mid-ocean ridge network has …

The alteration of upper oceanic crust entails growth of hydrous minerals and loss of
macroporosity, with associated large‐scale fluxes of H2O, CO2, Cl−, and K2O between …

The number of heat flow measurements at the Earth surface has significantly increased
since the last global analysis (Pollack et al., 1993, https://doi. org/10.1029/93RG01249), and …

Water and hydrous minerals play a key part in geodynamic processes at subduction zones,,
by weakening the plate boundary, aiding slip and permitting subduction—and indeed plate …

The crustal Urey cycle of CO2 involving silicate weathering and metamorphism acts as a
dynamic climate buffer. In this cycle, warmer temperatures speed silicate weathering and …

Evidence of fluid interaction with normal faults comes from their varied role as flow barriers
or conduits in hydrocarbon basins and as hosting structures for hydrothermal mineralisation …

Volatiles that are transported by subducting lithospheric plates to depths greater than 100
km are thought to induce partial melting in the overlying mantle wedge, resulting in arc …

Permeability, the ease of fluid flow through porous rocks and soils, is a fundamental but
often poorly quantified component in the analysis of regional‐scale water fluxes …

The" magmatic budget hypothesis" proposes that variability in magma supply is the primary
control on the large-scale hydrothermal distribution pattern along oceanic spreading ridges …

Microbial processes within the ocean crust are of potential importance in controlling rates of
chemical reactions and thereby affecting chemical exchange between the oceans and …