Marine barite (BaSO4) is a relatively ubiquitous, though minor, component of ocean
sediments. Modern studies of the accumulation of barite in ocean sediments have …

Phytoplankton productivity and export sequester climatically significant quantities of
atmospheric carbon dioxide as particulate organic carbon through a suite of processes …

Dissolution of marine sediment is a key source of dissolved iron (Fe) that regulates the
ocean carbon cycle. Currently, our prevailing understanding, encapsulated in ocean …

Ocean export production is a key constituent in the global carbon cycle impacting climate.
Past ocean export production is commonly estimated by means of barite and Barium …

Measurements of triple oxygen isotope ratios in barite horizons within post-Marinoan cap
carbonates have provided some of the most compelling evidence that the Marinoan …

Although deep magmatic fluids are important for the shallow magmatic-hydrothermal
evolution and transport/enrichment of ore-forming elements in transcrustal magmatic system …

The distribution of barium (Ba) concentrations in seawater resembles that of nutrients and
Ba has been widely used as a proxy of paleoproductivity. However, the exact mechanisms …

The upper continental crust (UCC) is an important reservoir of Ba within the Earth. We report
high precision (≤±0.05‰, 2SD) Ba isotopic data for 71 samples (including granites …

Serpentinites in subduction zones are important fluid reservoirs for crust-mantle interaction
and arc magma formation. The serpentinite-derived fluids can carry fluid-mobile elements …

The upper mantle, as sampled by mid-ocean ridge basalts (MORBs), exhibits significant
chemical variability unrelated to mechanisms of melt extraction at ridges. We show that …