Recent progress of geothermobarometer Ⅱ:

Kawasaki Toshisuke

doi:10.5575/geosoc.2017.0023

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Other Title

地質温度計圧力計の最近の進展Ⅱ：
地質温度計圧力計の最近の進展(2)微量元素分配を用いた地質温度計
チシツオンドケイアツリョクケイノサイキンノシンテン(2)ビリョウゲンソブンパイオモチイタチシツオンドケイ
Geothermometer based on the trace element partitioning
微量元素分配を用いた地質温度計

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<p>This study concerns the thermodynamics of trace element partitioning and its application to the P-T estimations of metamorphic rocks. Firstly, the application of Henry's law and Raoult's law, which are commonly used for the infinite dilute solutions to analyse trace element partitioning in geothermometry, is discussed. Secondly, P-T estimates based on trace element partitioning, including Zr-in-rutile, Ti-in-zircon and Ti-in-quartz geothermometers, are critically reviewed from practical and thermodynamical viewpoints. In particular, the Ti-in-quartz geothermometer is discussed in detail from the following perspectives: (1) the validity of using ppm amounts for Ti solubility of quartz; (2) the applicability of Nernst's distribution law to Ti partitioning between quartz and rutile containing high levels of impurities; (3) stable phase assemblages derived from the relation between the Gibbs' free energy and the bulk composition in the SiO₂-TiO₂ system; (4) variations in Ti content in quartz with temperature, as predicted from the SiO₂-TiO₂ phase diagram; and: (5) activity of the TiO₂ component in quartz containing other impurities.</p>

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The Journal of the Geological Society of Japan

The Journal of the Geological Society of Japan 123 (9), 707-716, 2017-09-15

The Geological Society of Japan

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