Application of 222Rn as a Tracer to Study Gas Hydrate Dynamics

应用 222Rn 作为示踪剂研究天然气水合物动力学

• 批准号: 9730817
• 负责人: Douglas Hammond
• 金额: $ 16.94万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-15 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9730817&HistoricalAwards=false
• 关键词: Application; 222Rn; Tracer; Study; Gas

Abstract Hammond/Brewer Radon isotope Rn-222 is a tracer that may provide some insight into kinetics of hydrate formation and their characteristics. Little is know of the interaction of radon with methane. The work will focus of measurements in the lab on the ability of Rn-222 to be incorporated into methane hydrates as they form and its post-crystallization retention. The high-pressure apparatus of MBARI will be used. Cores and seep samples will be collected from the Cascadia margin and Eel River basin to measure naturally occurring Rn/CH4 ratios in hydrates. Local benthic flux measurements will characterize the carbon dynamics in the vicinity of the hydrates. The work will establish whether Rn can be used as a geochronometer.

摘要哈蒙德/布鲁尔氡同位素Rn-222是一种示踪剂，可以为水合物的形成动力学及其特征提供一些信息。人们对氡与甲烷的相互作用知之甚少。这项工作将把实验室测量的重点放在Rn-222在甲烷水合物形成时融入到甲烷水合物中的能力以及其结晶后的保留上。将使用MBARI的高压设备。岩心和渗漏样品将从卡斯卡迪亚边缘和鳗鱼河流域收集，以测量水合物中自然产生的Rn/CH4比率。局部底栖生物通量测量将表征水合物附近的碳动态。这项工作将确定Rn是否可以用作地球计时器。