Silica-Carbonate Isotopic Temperature Calibration

Revised Carbonate - Water Isotopic Temperature Scale

The relationship between temperature and O content relative to that for a Cretaceous belemnite of the Pee Dee formation previously reported (Epstein, Buchsbaum, Lowenstam, and Urey, 1951) has been redetermined using modified procedures for removing organic matter from shells, and is found to be t (°O = 16.5 4.38 + 0.145*, where 8 is the difference in per mil of the O to O ratio between the samp...

Functionalisation of silica–carbonate biomorphs†

Biomorphs are a unique class of self-organised silica–carbonate mineral structures with elaborate shapes. Here we report first approaches to modify these complex inorganic architectures through silane chemistry, binding of nanoparticles, and organic polymerisation. This leads to functional nanostructures in which the complexity of the originally inorganic template is preserved, and offers new d...

Estimating Cambro-Ordovician seawater temperature and isotopic composition using carbonate clumped isotope paleothermometry on calcitic and phosphatic fossils

New Inhibitors for Silica and Calcium Carbonate Control In Geothermal

Scale and corrosion control are big challenges in utilizing geothermal energy. In the production wells, during or after flashing, brineresults in higher pH, which can happen deep inside the well.Higher pH in combination with high temperature causes calcium carbonate precipitation. Silica/Silicate precipitation becomes a problem when the brine gets cold in the surface equipment and the rejection...

Self-assembled silica-carbonate structures and detection of ancient microfossils.

We have synthesized inorganic micron-sized filaments, whose microstucture consists of silica-coated nanometer-sized carbonate crystals, arranged with strong orientational order. They exhibit noncrystallographic, curved, helical morphologies, reminiscent of biological forms. The filaments are similar to supposed cyanobacterial microfossils from the Precambrian Warrawoona chert formation in Weste...