Shock Temperatures in Geological Materials

地质材料的冲击温度

• 批准号: 8916505
• 负责人: Thomas Ahrens
• 金额: $ 30万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1994-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916505&HistoricalAwards=false
• 关键词: Shock; Temperatures; Geological; Materials

A series of new experiments will measure the thermal diffusivity of core (iron and iron compounds) and lower mantle minerals. In these experiments, different thickness films of core materials such as Fe, stainless steel, Si, or FeS, are embedded in a mantle mineral such as Mg2Si04 or A1203 and the thermal decay of the generally hotter core material is viewed radiatively. The radiation versus time profile can be inverted to yield strong constraints on thermal diffusivities of the poorer conducting transparent mineral undergoing shock pressure. Experiments will use A1203, MgO, LiF, and Mg2Si04 windows and film of Si, Fe, Ni, FeS, and FeS2. These data re of importance in determining whether the core-mantle thermal boundary layer is stable with respect to convection, as well as determine how much of the earth's heat flow comes from conduction across the core- mantle boundary.

一系列新实验将测量地核（铁和铁化合物）和下地幔矿物的热扩散率。 在这些实验中，将不同厚度的核心材料（例如Fe、不锈钢、Si或FeS）薄膜嵌入到地幔矿物（例如Mg 2 SiO 4 或Al 2 O 3 ）中，并且从辐射角度观察通常较热的核心材料的热衰变。 可以反转辐射与时间的关系曲线，以对承受冲击压力的导电性较差的透明矿物的热扩散率产生强烈的约束。 实验将使用A12O3、MgO、LiF和Mg2SiO4窗口以及Si、Fe、Ni、FeS和FeS2薄膜。 这些数据对于确定地核-地幔热边界层对于对流是否稳定以及确定地球热流有多少来自穿过地核-地幔边界的传导非常重要。