Oxygen isotope thermometry, speedometry, and hygrometry: Apparent equilibrium temperature versus closure temperature

Thermometry (temperature measurement)

Thermometry ................................................................................................................................................. 1 Applications .............................................................................................................................................. 1 Temperature metrology ............................................................

Thermometry (temperature measurement)

Thermometry ................................................................................................................................................. 1 Applications .............................................................................................................................................. 2 Temperature metrology ............................................................

Temperature-dependent oxygen and carbon isotope fractionations of biogenic siderite

Isotopic compositions of biogenic iron minerals may be used to infer environmental conditions under which bacterial iron reduction occurs. The major goal of this study is to examine temperature-dependent isotope fractionations associated with biogenic siderite (FeCO3). Experiments were performed by using both mesophilic (,35°C) and thermophilic (.45°C) iron-reducing bacteria. In addition, contr...

High-temperature Chemical Processing on Asteroids: an Oxygen Isotope

Improved oxygen isotope temperature calibrations for cosmopolitan benthic foraminifera

Despite decades of use as a paleoceanographic proxy, considerable uncertainty still surrounds the temperature dependence of benthic foraminiferal dO. Widely applied paleotemperature equations may mix non-equilibrium foraminifera with equilibrium synthetic calcite, resulting in temperature sensitivities that are too large. Warm-water foraminiferal calibrations may give temperature sensitivities ...