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

通过岩盐中流体包裹体的分析研究古海水和古大气

• 批准号: 61470036
• 负责人: MATSUO Sadao
• 金额: $ 2.75万
• 依托单位: University of Electrocommunications (1988)Tokyo Institute of Technology (1986-1987)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61470036/
• 关键词: halite; brine; fluid inclusion; ball-mill; hydrogen isotope ratio; oxygen isotope ratio; 海洋の進化; D; H; ^<18>O; ^<16>O; 流対包有物; 【^(18)O】; 【^(16)O】

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.

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。

项目成果

J.Horita;J.R.Gat: Chem.Geol.(Isotope Geosci.Sec.). 72. 85-88 (1988)

J.Horita；J.R.Gat：化学地质（同位素地球科学）。

E.Mazor;S.Matsuo 他: Bulletin of Volcanology. 50. 71-85 (1988)

E.Mazor；S.Matsuo 等人：《火山学通报》50. 71-85 (1988)。

T. Ohba; S. Matsuo: "Precise determination of hydrogen and oxygen isotope ratios of water in fluid inclusions of quartz and halite" Geochemical Journal. 22. 55-68 (1988)

T.奥巴；

G. Saito; H. Shinohara; S. Matsuo: "Effect of flow velocity on temperature and chemical composition of fumarolic gases of Usu volcano, Hokkaido, Japan" J. Ital. Soc. Mineral. Petrol. Geochem.(1988)

G.斋藤；

Y. Kuroda; S. Matsuo; T. Yamada: "D/H fractionation during dehydration of hornblende, mica and volcanic glass" Jour. Jpn. Assoc. Min. Petr. Econ. Geol.83. 85-94 (1988)

Y.黑田；