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Article
Open AccessBiodegradation of materials: building bridges between scientific disciplines
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Article
Open AccessRapid grain boundary diffusion in foraminifera tests biases paleotemperature records
The oxygen isotopic compositions of fossil foraminifera tests constitute a continuous proxy record of deep-ocean and sea-surface temperatures spanning the last 120 million years. Here, by incubating foraminife...
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Article
Open AccessA comparative study of the dissolution mechanisms of amorphous and crystalline feldspars at acidic pH conditions
The dissolution of amorphous and crystalline oligoclase, a Na-feldspar with traces of Ca and K, was investigated at 90 °C and acidic pH of 1.5 and 3 to unravel the impact of long- and short-range orders on sil...
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Article
Open AccessFast and pervasive diagenetic isotope exchange in foraminifera tests is species-dependent
Oxygen isotope compositions of fossil foraminifera tests are commonly used proxies for ocean paleotemperatures, with reconstructions spanning the last 112 million years. However, the isotopic composition of th...
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Open AccessEstimating the activation energy of bond hydrolysis by time-resolved weighing of dissolving crystals
Bond-breaking activation energy EB is nowadays a key parameter for understanding and modeling crystal dissolution processes. However, a methodology to estimate EB based on classical dissolution experiments still ...
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Article
Open AccessSymbiotic cooperation between freshwater rock-boring bivalves and microorganisms promotes silicate bioerosion
Bioerosion is a process with a high socio-economic impact that contributes to coastal retreat, and likely to increase with climate change. Whereas limestone bioerosion is well explained by a combination of mec...
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Article
Open AccessCarbon dioxide sequestration through silicate degradation and carbon mineralisation: promises and uncertainties
Turning carbon dioxide (CO2) into rocks: controlling this process, which naturally operates at the Earth’s surface over geological timescales, is likely to represent a major technological challenge of this centur...
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Article
Open AccessOrganic molecular heterogeneities can withstand diagenesis
Reconstructing the original biogeochemistry of organic fossils requires quantifying the extent of the chemical transformations that they underwent during burial-induced maturation processes. Here, we performed...
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Article
Experimental determination of the reactivity of the Frio Sandstone, Texas, and the fate of heavy metals resulting from carbon dioxide sequestration
Experiments were carried out at 100 bar pressure and 60 or 150 °C in 0.7 m NaCl brine to characterize the reactivity of two Frio quartzofeldspathic sandstone compositions and to elucidate the fate of metals (...
