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Water column methane oxidation adjacent to an area of active hydrate dissociation, Eel river Basin
Abstract The role of methane clathrate hydrates in the global methane budget is poorly understood because little is known about how much methane from decomposing hydrates actually reaches the
Diagenesis of siliceous oozes—I. Chemical controls on the rate of opal-A to opal-CT transformation—an experimental study
Abstract Evidence from deep-sea sediments supports the following diagenetic maturation sequence: opal-A (siliceous ooze) → opal-CT (porcelanite) → chalcedony or cryptocrystalline quartz (chert). A
U/Th-dating living and young fossil corals from the central tropical Pacific
This study evaluates the accuracy of U/Th dates for young (6 a few thousand years old) reef corals, both living and fossil, and explores strategies for refining those dates. The high precision of the
Origin of marine barite deposits: Sr and S isotope characterization
Barite can precipitate in microenvironments in the water column (marine barite), from supersaturated pore fluids at the oxic-anoxic boundary within marine sediments and where Ba-rich pore fluids are
Constraints on the formation of sedimentary dolomite.
The experimental replacement of calcite and aragonite by dolomite under a variety of conditions indicates that dolomitization can take place in marine and lacustrine environments under two
Gas hydrate occurrence from pore water chlorinity and downhole logs in a transect across the northern Cascadia margin (Integrated Ocean Drilling Program Expedition 311)
[1] A transect of four sites drilled by Integrated Ocean Drilling Program Expedition 311 provides an ideal data set to investigate the distribution of gas hydrates across the northern Cascadia
Marine barite as a monitor of seawater strontium isotope composition
THE strontium isotope ratio in sea water is influenced by climate, tectonics, weathering and hydrothermal activity at ocean ridges1–4. Its evolution through time, determined primarily by measuring
Seawater Sulfur Isotope Fluctuations in the Cretaceous
A high-resolution record of the sulfur isotopic composition of seawater sulfate for the Cretaceous indicates a shift in the location of organic carbon burial to terrestrial or open-ocean settings and implies short-term variability in atmospheric oxygen partial pressure.
Abstract Theoretical considerations, calculations, and data reported by Keil et al. (1994a) were used to assess the recent hypotheses that mineral surface roughness controls the specific surface area
Stable Cl isotopes in subduction-zone pore waters: Implications for fluid-rock reactions and the cycling of chlorine
Stable Cl isotope ratios, measured in marine pore waters associated with the Barbados and Nankai subduction zones, extend significantly (to ∼−8‰) the range of δ 37 Cl values reported for natural