Upon exhumation and cooling, contrasting compressibilities and thermal expansivities induce differential strains (volume mismatches) between a host crystal and its inclusions. These strains can be quantified in situ using Raman spectroscopy or X-ray diffraction. Knowing equations of state and elastic properties of minerals, elastic thermobarometry inverts measured strains to calculate the pressure-temperature conditions under which the stress state was uniform in the host and inclusion. These are commonly interpreted to represent the conditions of inclusion entrapment. Modeling and experiments quantify corrections for inclusion shape, proximity to surfaces, and (most importantly) crystal-axis anisotropy, and they permit accurate application of the more common elastic thermobarometers. New research is exploring the conditions of crystal growth, reaction overstepping, and the magnitudes of differential stresses, as well as inelastic resetting of inclusion and host strain, and potential new thermobarometers for lower-symmetry minerals.▪ A physics-based method is revolutionizing calculations of metamorphic pressures and temperatures. ▪ Inclusion shape, crystal anisotropy, and proximity to boundaries affect calculations but can be corrected for. ▪ New results are leading petrologists to reconsider pressure-temperature conditions, differential stresses, and thermodynamic equilibrium.

中文翻译：

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 弹性温压计


在折返和冷却时，对比的压缩性和热膨胀性会导致主晶体与其内含物之间产生差异应变（体积不匹配）。这些应变可以使用拉曼光谱或 X 射线衍射进行原位定量。了解矿物的状态方程和弹性特性后，弹性温压法可对测量的应变进行反演，以计算基质和包裹体中应力状态均匀的压力-温度条件。这些通常被解释为代表夹杂物捕获的条件。建模和实验量化了夹杂物形状、表面接近度和（最重要的）晶轴各向异性的校正，并且它们允许准确应用更常见的弹性温压计。新的研究正在探索晶体生长的条件、反应超越、差异应力的大小、夹杂物和主应变的非弹性重置，以及用于低对称性矿物的潜在新型温压计。▪ 基于物理的方法正在彻底改变计算变质压力和温度。 ▪ 夹杂物形状、晶体各向异性和边界接近程度会影响计算，但可以进行校正。 ▪ 新的结果促使岩石学家重新考虑压力-温度条件、差异应力和热力学平衡。