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Earth and Space Sciences · 术语表

什么是 Geothermometer; geobarometer; exchange reaction; net-transfer reaction?

又称: geothermometer · geobarometer · exchange reaction · net-transfer reaction

Definition 11.2 University Earth and Space Sciences — Year 2 · 第 11 章 — Thermobarometry and P–T–t Paths

A geothermometer (geobarometer) is an equilibrium among minerals whose position depends mainly on temperature (pressure), so that the compositions of the minerals give the temperature (pressure) of their last equilibrium. An exchange reaction swaps two elements between two minerals, such as iron and magnesium between garnet and biotite, without creating or destroying either mineral. A net-transfer reaction makes some minerals at the expense of others.

Garnet–biotite exchange: the twelve experimental brackets at 2.07\, kbar (blue, as tabulated by Holdaway and co-authors, 1997) and the line of the proposition with the fitted _r H and _r S (red).
Garnet–biotite exchange: the twelve experimental brackets at 2.07 kbar2.07\,\mathrm{kbar} (blue, as tabulated by Holdaway and co-authors, 1997) and the line of the proposition with the fitted ΔrH\Delta_r H and ΔrS\Delta_r S (red).
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