A study on paleo-sea water and paleo-atmosphere through the analysis of fluid inclusions in halites

在该项目的三年期限内，提供了一台由Pyrex玻璃制成的带冷指的真空球磨机。通过使用该球磨机，对岩盐中所含卤水的萃取水进行D/H和180/160分析的结果比以前更可靠。在此基础上，取得了如下地球化学成果：1）石盐岩; 2）根据加州Searles湖不同层位的卤水同位素分析，讨论了死亡谷地区近2 Ma来的气候变化;（3）摩洛哥海域海相沉积物中的侏罗纪岩盐在形成后可能经历了大气降水环境。1）用H_2 - H_2O平衡法测定卤水的D/H活度比; 2）用共沸蒸馏法测定D/H浓度比（与以色列J. Gat公司合作）;荷兰，美国），水合物盐-卤水体系D/H分馏系数的确定。

During the three-year term of this project, a vacuum ball-mill made of Pyrex glass with a cold finger was made available. By the use of this ball-mill, results on D/H and 180/160 analyses for the extracted water from brine included in halites became more reliable than before. Based on this technical improvements, following geochemical results were obtained; 1) halite of Mt. Sedom Israel, is interperted to be recrystallized with extraneous water by the comparison of D/H and 180/160 ratios with those of Dead Sea brines, 2) the climatic changes during the last 2 Ma is discussed for the Death Valley area, based on the isotopic analyses of brines in halites of various horizons of Searles Lake, California, and 3) Jurassic halites in marine sediments off Morocco is possible to be subjected to meteoric water environments after their formation.As fundamental contributions to the fluid inclusion study from this project, following results are accomplished; 1) D/H activity ratio determination of brines by the application of H_2 - H_2O equilibrium method, 2) D/H concentration ratio determination by an azeotropic distillation (with J. Gat, Israel), 3) chemical analysis of microquantity of brine (with H.D. Holland, U.S.A.),and 4) determination of D/H fractionation factors in hydrate salt - brine systems.