Fluid Inclusions in Halite: Clues to the History of Seawater

石盐中的流体包裹体：海水历史的线索

• 批准号: 9004184
• 负责人: Heinrich Holland
• 金额: $ 10万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004184&HistoricalAwards=false
• 关键词: Fluid; Inclusions; Halite; Clues; History

The proposed program of research is designed to improve our understanding of the chemical evolution of seawater during the last 600 m.y. of Earth history. To accomplish this, we plan to extend our analytical data base for the chemical composition of brines in fluid inclusions trapped in halite (NaCl) in marine evaporites. Many of these brines are samples of the solutions from which the salt precipitated. In marine evaporites these brines are largely or entirely derived from seawater; their composition therefore reflects the composition of seawater at the time of salt precipitation. In many instances the evolution of these brines from seawater has been so complicated, that little information regarding the composition of the parent seawater can be gained from the composition of the inclusion fluids. Fortunately, the evolution of the brines in some marine evaporites has been sufficiently simple, so that much of the chemistry of the starting seawater can be reconstructed. The data accumulated to date indicate that the composition of seawater has been surprisingly conservative during the past 600 m.y. At present these data are still fragmentary. We propose to extend them considerably, and to construct a reasonably complete record of the composition of seawater during the Phanerozoic Eon.

拟议的研究计划旨在提高我们对最近600 M.Y.海水化学演化的理解。地球历史。 为此，我们计划扩展我们的分析数据库，以使盐水中的液体夹杂物（NaCl）在海洋蒸发物中捕获的盐水组成。 这些盐水中有许多是盐沉淀的溶液的样品。 在海洋蒸发物中，这些盐水主要或完全来自海水。因此，它们的组成反映了盐沉淀时海水的组成。 在许多情况下，这些盐水从海水的演变变得如此复杂，以至于几乎没有关于父母海水组成的信息，可以从包含液的组成中获得。 幸运的是，在某些海洋蒸发物中，盐水的演变非常简单，因此可以重建起始海水的大部分化学反应。 迄今为止累积的数据表明，在过去的600 M.Y.中，海水的组成一直是保守的。 目前，这些数据仍然是零碎的。 我们建议将它们大大扩展，并在Phanerokoic Eon期间构建海水组成的合理记录。