Experimental Studies of Earth and Planetary Materials at Extreme Conditions of Pressure and Temperature

极端压力和温度条件下地球和行星材料的实验研究

• 批准号: RGPIN-2018-05021
• 负责人: Secco, Richard
• 金额: $ 4.44万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=664647
• 关键词: Experimental; Studies; Earth; Planetary; Materials

Large scale processes of heat and mass movement deep in the interior of planets control much of what happens on the surface. The focus of Dr. Secco's research program is to bring the inaccessible deep interior of planets into the lab by measuring physical properties of core and mantle materials under simultaneous extreme pressure (0-23GPa) and temperature (220-2300K) conditions in four large volume presses – one of which is the largest capacity research press in North America. Novel techniques have been developed and will be employed at high pressures to measure electrical conductivity of terrestrial planetary core mimetic Fe-S-Si solids and liquids at high temperatures as well as NH3-H2O fluids at the low temperatures of subsurface oceans of outer planetary satellites. These studies will provide critical data to address the new controversies in models of thermal convection in fluid outer cores, inner core age, geodynamo, and magnetic induction in subsurface oceans of icy satellites. Using a technique recently developed in our lab, the enigmatic origin of deep focus earthquakes will be investigated by measuring acoustic emission in phase transforming mantle olivines (Mg1-xFex)2SiO4 (0.1

大规模的热量和质量运动在行星内部深处控制了地表上发生的许多事情。 SECCO博士研究计划的重点是通过在四个大容量出版社中测量简单极端压力（0-23GPA）和温度（220-2300K）条件下的核心和地幔材料的物理特性，将无法访问的行星深入到实验室中 - 其中之一是北美最大的能力研究出版社。已经开发了新的技术，并将在高压下使用，以测量高温下陆地行星核心模仿Fe-S-SI固体和液体的电导率，以及在外行星卫星的地下海洋低温下NH3-H2O流体的电导率。这些研究将提供关键的数据，以解决流体外核，内核年龄，geodynamo和磁感应冰冷卫星的磁感应的热转化模型中的新争议。使用最近在我们的实验室开发的技术，将通过测量相变地幔橄榄石（MG1-XFEX）2SIO4中的声发射来研究深层地震的神秘来源。