不同晶形石盐沉积生长特征及对包裹体温度的影响

石盐晶体生长过程中捕获流体包裹体，利用冷冻测温法得到的均一温度信息与古水温存在良好的相关性。在部分地区，利用包裹体最大均一温度评价古气候时，温度数据与孢粉学反映的气候特征存在冲突，不同晶形的石盐沉积特征，及其晶体条纹内包裹体温度代表的地质含义需进一步探讨。笔者在分析经典测温数据的基础上，观察常温蒸发实验中漏斗晶和人字晶的形成及生长过程，分析了不同温度段均一温度与气温、水温之间的关系。结合现代气象记录数据，分析了最大均一温度评价气候时存在的局限性。研究认为：漏斗晶晶核形成与卤水表面，包裹体温度受温度和气压共同影响，漏斗晶在卤水底部绕核生长，漏斗晶外围包裹体温度对应水底温度，沉入水下后漏斗晶生长缓慢，包裹体最大温度可能代表年度最高温度，以此为指标评价气候得出的结论过于炎热；人字晶是多个漏斗晶之间的桥接部分，大部分形成于卤水蒸发将近结束之时，人字形条纹内包裹体温度受气温和地表温度共同影响，地表温度远大于气温是造成包裹体最高温度过高的主要原因。

Sedimentary growth characteristics of different crystal forms of halite and its influence on the temperature of inclusions

The uniform temperature information obtained by freezing temperature measurement of fluid inclusions trapped during the growth of halite crystals has a good correlation with the ancient water temperature. In some areas, when the maximum uniform temperature of inclusions is used to evaluate paleoclimate, the temperature data conflicts with the climatic characteristics deciphered from palynological data. The sedimentary characteristics of different crystal forms of halite and the geological implications of the measured temperature in the crystal inclusions need to be further explored. Based on the analysis of classical temperature measurement data, the author observed the formation and growth process of funnel crystals and herringbone crystals in a room temperature evaporation experiment, and analyzed the relationship between uniform temperature, air temperature, and water temperature in different temperature ranges. Combined with the meteorological records, the limitations of the maximum uniform temperature when evaluating climate are analyzed. It is believed that the funnel crystal nucleus is formed on the surface of brine, and the inclusions temperature is affected by both temperature and air pressure. The funnel crystal grows around the nucleus at the bottom of brine, and the temperature of the outer inclusions of the funnel crystal corresponds to the bottom temperature. After sinking into water, the funnel crystal grows slowly and the maximum temperature of the inclusions may represent the annual maximum temperature. This will erroneously indicate that the climate is too hot. The herringbone crystal is the bridge between multiple funnel crystals, most of which are formed at the end of brine evaporation. The temperature of the inclusions in the herringbone striation is affected by both air temperature and the surface temperature. The main reason for the high maximum temperature of inclusions is that the surface temperature is much higher than the air temperature.