Early Career: Acquisition of a High Sensitivity Superconducting Rock Magnetometer for Paleomagnetic and Paleointensity Research

早期职业生涯：购买高灵敏度超导岩石磁力计用于古地磁和古强度研究

• 批准号: 1160854
• 负责人: Aleksey Smirnov
• 金额: $ 33.42万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-03-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1160854&HistoricalAwards=false
• 关键词: Early; Career; Acquisition; Sensitivity; Superconducting

1160854SmirnovThis Division of Earth Sciences Instrumentation and Facilities Program grant supports acquisition of a 2G Enterprises 4K-755 high-resolution superconducting rock magnetometer (SRM) with a small access bore (6 mm) at Michigan Technological University. The small bore SRM allows for paleomagnetic directional and paleointensity analysis of single crystals of ancient (Precambrian) silicates hosting magnetic and paramagnetic fine grained mineral inclusions. These igneous phase single crystals are likely to hold the most pristine record of Earth?s early magnetic field and yet to date very few reliable paleointensity measurements from Precambrian rocks have been made. The analytical sensitivity now available with a small bore SRM makes proposed measurements possible. The PI is in possession of numerous plagioclase separates from Precambrian dikes sampled around the word (e.g., the ~2.45 Ga Burakovka dikes (Russia), the ~2.9 Ga Munni-Munni intrusion and the ~2.42 Ga Widgiemooltha dikes (Western Australia), the ~2.37 Ga Bangalore dikes and the ~2.2 Ga Mahhubnagar dikes (India), and the ~1.1 Ga Portage Lake basalts (USA)) from previous NSF/EAR research support. The PI is well poised to immediately make use of the requested small bore SRM for NSF/EAR funded research on the nature of Earth?s early magnetic field with implications for Precambrian tectonics and the generation and early behavior of the geodynamo; the magnetic field which shields the Earth surface from the highly energized solar wind and allowed for the evolution of Earth?s biota. This instrument will be only the second of its kind in a U.S. academic laboratory. The infrastructural impacts of this acquisition are very significant for the U.S. paleomagnetic research community. The instrument will complement existing paleomagnetic analysis equipment in the PI?s lab and serve an active student research group including an active PI-undergraduate mentoring program at MTU.***

1160854Smirnov地球科学仪器和设施计划拨款支持在密歇根理工大学购买带有小孔径（6 毫米）的 2G Enterprises 4K-755 高分辨率超导岩石磁力计 (SRM)。 小口径 SRM 可以对含有磁性和顺磁性细粒矿物包裹体的古代（前寒武纪）硅酸盐单晶进行古地磁定向和古强度分析。 这些火成相单晶可能保存着地球早期磁场最原始的记录，但迄今为止，对前寒武纪岩石的可靠古强度测量还很少。 现在，小口径 SRM 具备的分析灵敏度使建议的测量成为可能。 PI 拥有大量从世界各地采样的前寒武纪岩脉中分离出来的斜长石（例如~2.45 Ga Burakovka 岩脉（俄罗斯）、~2.9 Ga Munni-Munni 侵入岩和~2.42 Ga Widgiemooltha 岩脉（西澳大利亚）、~2.37 Ga Bangalore 岩脉和~2.2 Ga Mahhubnagar） 岩脉（印度）和 ~1.1 Ga Portage 湖玄武岩（美国））来自之前的 NSF/EAR 研究支持。 PI 已准备好立即利用所请求的小口径 SRM 进行 NSF/EAR 资助的地球早期磁场性质研究，这对前寒武纪构造以及地球发电机的产生和早期行为具有影响；磁场保护地球表面免受高能太阳风的影响，并允许地球生物群的进化。 该仪器将是美国学术实验室中的第二台此类仪器。 此次收购对美国古地磁研究界的基础设施影响非常重大。 该仪器将补充 PI 实验室现有的古地磁分析设备，并为活跃的学生研究小组提供服务，其中包括 MTU 活跃的 PI 本科生指导计划。***