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流体包裹体再平衡是流体包裹体研究中常遇到的现象,如何识别流体包裹体再平衡,以及解释造成再平衡的地质因素是研究者们需要面对的问题。本文总结了流体包裹体再平衡机制,并简要分析了流体包裹体再平衡的影响因素,就流体包裹体岩相学和均一温度特征详细介绍了再平衡流体包裹体识别方法。地壳中不同的P一T演化史会影响流体包裹体的再平衡过程,变形程度较低时,流体包裹体可能是以塑性拉伸变形为主;变形程度较高时,可能发生泄露、爆裂等,造成流体包裹体不可逆变形。地质作用强烈、变化速度较快的地质背景下,主矿物脆性强、解理发育,个体较大、形状不规则、拉长型的流体包裹体容易受改造。再平衡流体包裹体一般存在针形拉伸变化或爆裂现象(如爆裂晕),且同一FIA流体包裹体气液比、相态等变化较为明显,具较高或较低异常均一温度,均一温度变化较大。流体包裹体再平衡的量化模拟和参考标准有待确立,是未来流体包裹体再平衡问题深化研究的重要方向。
Fluid inclusions rebalancing is a common phenomenon in the study of fluid inclusions. How to identify the fluid inclusions to rebalance and to explain the geological factors that cause rebalancing are the problems that researchers need to face. This paper summarizes the mechanism of fluid inclusions rebalancing and briefly analyzes the influencing factors of fluid inclusions rebalancing. The methods of fluid inclusions identification based on the petrography and homogenization temperature of fluid inclusions are introduced in detail. The different P-T evolutionary history in the crust affects the fluid inclusions rebalancing process. When the degree of deformation is low, the fluid inclusions may be dominated by plastic tensile deformation. When the degree of deformation is high, leakage and burst may occur , Resulting in irreversible deformation of fluid inclusions. Under the geologic background of strong geological changes and rapid changes, the host minerals are highly brittle and develop with cleavage, with larger individuals, irregular shapes and elongate fluid inclusions. The re-equilibrium fluid inclusions generally have pin-shaped tensile or burst phenomena (such as burst cracks). The gas-liquid ratio and phase state of the same FIA fluid inclusions are more obvious with higher or lower abnormal homogenization temperature, uniform temperature big change. The quantitative simulation and reference standards for fluid inclusions rebalancing have yet to be established, which is an important direction for further research on the fluid inclusions rebalancing problem in the future.