SGER: The Clathrate Study System
SGER:包合物研究系统
基本信息
- 批准号:9021666
- 负责人:
- 金额:$ 5万
- 依托单位:
- 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:1990-08-01 至 1993-01-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Clathrates are ice-like, crystalline solids composed of water and low molecular weight gas molecules. Because of the unique pressure and temperature fields in which they are stable, clathrates tend to be abundant in continental slope and rise sediments in the deep sea. The resulting precipitation of solid clathrates within marine sediments is detectable from the occurrence of bottom-parallel reflectors which are visible in seismic reflection records, are generally parallel to the ocean bottom, and cut across other sediment reflections. The bottom parallel reflector apparently represents the base of the clathrate stability field. Below this reflector the clathrate decomposes into fresh water and dissolved gas. Few pristine samples of clathrates from the deep-sea have ever been fully analyzed, since the clathrates tends to decompose rapidly when brought to the sea surface. Recently the Ocean Drilling Program has developed a pressure core barrel which is capable of retrieving a one meter long sample of marine sediment and returning the material to the drillship under in situ pressure. During a recent engineering test of this system, an undisturbed sample was recovered from the Nankai Trench. the present award will support preliminary development of the necessary analytical techniques to examine this unexpected sample important in fully documenting chemical reactions and conditions and in evaluating the release of clathrates gasses to the atmosphere during sea-level changes.
笼状物是由水和低分子气体分子组成的冰状结晶固体。由于独特的压力场和温度场稳定,包合物倾向于在大陆斜坡和深海上升的沉积物中丰富。由此产生的海洋沉积物中固体笼状物的降水可以从海底平行反射器的出现中检测到,这种反射器在地震反射记录中可见,通常平行于海底,并与其他沉积物反射相切。底部平行反射层显然代表了包层稳定场的基础。在这个反射器下面,笼状物分解成淡水和溶解气体。很少有来自深海的原始包合物样本被完全分析过,因为当包合物被带到海面时,往往会迅速分解。最近,海洋钻探计划开发了一种压力岩心桶,它能够回收一米长的海洋沉积物样本,并在就地压力下将材料返回钻井船。在最近对该系统进行的一次工程测试中,从南开海沟回收了一个未受干扰的样品。本奖项将支持初步开发必要的分析技术,以检查这一意想不到的样本,这对于全面记录化学反应和条件以及评估海平面变化期间向大气释放笼状气体非常重要。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Garrett Brass其他文献
Garrett Brass的其他文献
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{{ truncateString('Garrett Brass', 18)}}的其他基金
Operations of the US Arctic Research Commission
美国北极研究委员会的运作
- 批准号:
9810580 - 财政年份:1998
- 资助金额:
$ 5万 - 项目类别:
Interagency Agreement
Experimental Studies of Freezing Brines
冷冻盐水的实验研究
- 批准号:
8415563 - 财政年份:1985
- 资助金额:
$ 5万 - 项目类别:
Continuing Grant
Studies of Production and Circulation of Warm Salty Bottom Waters in Ancient Oceans
古代海洋温暖咸底层水的产生和循环研究
- 批准号:
8215354 - 财政年份:1983
- 资助金额:
$ 5万 - 项目类别:
Standard Grant
Studies of Freezing Brines Using the Differential Scanning Calorimeter
用差示扫描量热仪研究冷冻盐水
- 批准号:
8200840 - 财政年份:1982
- 资助金额:
$ 5万 - 项目类别:
Standard Grant
Studies of Production and Circulation of Warm Salty Bottom Water in Ancient Oceans
古代海洋温暖咸底水的产生和循环研究
- 批准号:
8111149 - 财政年份:1981
- 资助金额:
$ 5万 - 项目类别:
Standard Grant
Sulfur and Oxygen Isotopes and the Atmospheric Sulfur Cycle
硫和氧同位素以及大气硫循环
- 批准号:
7909239 - 财政年份:1979
- 资助金额:
$ 5万 - 项目类别:
Continuing Grant
Dynamic Modelling of Pelagic Sedimentation in Black Sea
黑海中上层沉积的动态模拟
- 批准号:
7602022 - 财政年份:1976
- 资助金额:
$ 5万 - 项目类别:
Standard Grant
Surface Chemistry and Reaction Kinetics of Phosphate-Calcium Carbonate Interaction
磷酸盐-碳酸钙相互作用的表面化学和反应动力学
- 批准号:
7402352 - 财政年份:1974
- 资助金额:
$ 5万 - 项目类别:
Standard Grant
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钡锗基过渡族金属笼装物clathrate材料单晶生长、能带结构调控与非简谐振动机理研究
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- 批准年份:2009
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- 项目类别:面上项目
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