A Geochemical Approach for Monitoring a CO2 Pilot Site: Rousse, France. A Major Gases, CO2-Carbon Isotopes and Noble Gases Combined Approach — This paper presents the geochemical characterization of various gas end-members involved in a depleted gas field CO2 storage pilot (Rousse, France). In this pilot, CO2 is produced by oxycombustion from natural gas transformed into fuel gas at the Lacq pl...

Time series of chloride concentrations and oxygen-18 isotopic ratios are widely used for tracing catchment storage and mixing processes and for inferring catchment travel-time distributions. However, neither chloride nor oxygen-18 is an ideal hydrologic tracer: chloride concentrations in streamwater can be affected by dry deposition, evapoconcentration and biogeochemical cycling, and water isot...

Sediment fingerprinting experiments have been used to demonstrate the sensitivity of numerical mixing model outputs different particle size distributions in source materials and experimental sediment mixtures. The study aims examine further grain effects distribution geochemical elements by soils through a laboratory experiment simulating sorting processes, investigate if fractions are influenc...

We used the natural geochemical tracers radon-222 and radium isotopes (223Ra, 224Ra, 226Ra, 228Ra) to assess exchange rates between the Chao Phraya River and the Gulf of Thailand, and the magnitude of groundwater discharge in the estuary. We performed tracer surveys during two periods in 2004, in January (dry season, gauged river discharge 47 m3 s21) and in July (wet season, 430 m3 s21). The is...

A MAJOR part of dental practice is the treatment of localised lesions in teeth and the replacement of lost tissue with' restorative materials. As stated by Skinner and Phillips (1967), the lack of adhesion of most of them to the structure of the prepared tooth presents a serious problem; it causes seepage of deleterious agents along the interface between the restoration and the tooth (Nelscn et...

The aim of the laboratory experiments presented here is to find a set of thermosensitive tracers to identify thermal characteristics in deep geothermal reservoirs during the long-term operation of a power plant. In the near future several short-term push-pull experiments are planned at different test-sites in northern Europe. As a first step we focus on tracers which fulfill the requirements of...

A fundamental challenge in modern mantle geochemistry is to link geochemical data with geological and geophysical observations. Most of the early geochemical models involved a layered mantle and the concept of geochemical reservoirs. Indeed, the two layer mantle model has been implicit in almost all geochemical literature and the provenance of oceanic island basalt (OIB) and mid-ocean ridge bas...