MRI: Acquisition of a Superconducting Rock Magnetometer System for Earth Sciences Research

MRI：获取用于地球科学研究的超导岩石磁力计系统

• 批准号: 2018253
• 负责人: Sarah Slotznick
• 金额: $ 51万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018253&HistoricalAwards=false
• 关键词: MRI; Acquisition; Superconducting; Rock; Magnetometer

This Major Research Instrumentation (MRI) Program grant supports acquisition of a superconducting rock magnetometer (SRM) equipped with in-line rock magnetic coils and automated sample handling system (RAPID system) and required ancillary equipment. The SRM will support research and research training in the Department of Earth Sciences at Dartmouth College. The SRM will support research on the development and evolution of the geomagnetic field, continental paleogeography, and deep-time environmental magnetism. The SRM will also support postdoctoral scientist, graduate, and undergraduate student research. The investigator plans local K-12 outreach through laboratory tours and summer research internships. The instrument will also support regional collaborations and faculty and student use from institutions in the New England region and likely beyond.Magnetic study of minerals, sediments, and rocks can inform us about past conditions on Earth’s surface—from the development and evolution of the geomagnetic field to the geographic position of continents to the timing of key events in Earth (and human) history to tracking changes in climate and environmental conditions—which in turn can inform our projections of Earth’s future. Research at Dartmouth will focus on novel magnetic applications and techniques such as “deep-time” environmental magnetism with absolute timing of magnetic mineral formation and development of a quick, non-destructive technique for identifying magnetic iron sulfides present in low-abundance. The SRM-RAPID system and thermal demagnetizer will provide an on-campus resource for measurements of thermal demagnetization and paleointensity. These protocols require large sample numbers and high-resolution steps that can result in tens of thousands of measurements per study. The instrumentation will also support automated alternating field demagnetization and rock magnetic experiments involving magnetic susceptibility, anhysteretic remanent magnetization, and isothermal remanent magnetization. Remanence magnetic measurements made by the SRM-RAPID system can be used for efficiently characterizing the magnetic mineralogy of samples, as well as analyzing ancient recorded fields in geologic samples. The high-sensitivity of the SRM and the low magnetic moment of the RAPID system holder will allow researchers to push the frontiers of the field through analysis of weakly magnetized sediments, heavily remagnetized volcanics, and very small samples such as biological specimens, filtered particulate, chemical residues, and pure mineral phases.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项主要的研究仪器（MRI）计划赠款支持配备了串联岩石磁管线圈和自动化样品处理系统（快速系统）和所需的辅助设备的超导岩石磁力计（SRM）。 SRM将支持达特茅斯学院地球科学系的研究和研究培训。 SRM将支持有关地磁领域发展和演变的研究，持续的古地理以及深度的环境磁性。 SRM还将支持博士后科学家，研究生和本科生研究。研究人员计划通过实验室旅行和夏季研究实习计划当地的K-12外展。该工具还将支持新英格兰地区机构以及可能更远的机构的区域合作，教师和学生使用。对矿物质，沉积物和岩石的磁性研究可以告知我们地球表面上过去的状况，从地球领域的发展和演变从地球上的地理事件到地球上（和人类的历史上）的地理位置（和人类）的环境变化，以使我们的环境变化，以使我们的环境变化，以使我们的环境变化，并涉及环境的环境和环境，并在环境中进行环境的变化。达特茅斯（Dartmouth）的研究将集中在新型的磁性应用和技术上，例如“深度”环境磁性，并具有磁性矿物形成的绝对时机，并开发了一种快速，无损的技术，用于鉴定存在低强度中存在的磁铁硫化物。 SRM-RAPID系统和热电器策略将为校园资源提供用于测量热消电和古显着的校园资源。这些方案需要大量样本数量和高分辨率步骤，这可能导致每项研究成千上万的测量。该仪器还将支持自动替代场电磁和岩石磁性。涉及磁敏感性，无序的磁性磁化和等温透射磁化的实验。 SRM-Rapid系统进行的恢复磁测量可用于有效地表征样品的磁性矿物学，并在地质样本中分析了古代记录的田地。快速系统持有人的SRM和低磁矩的高敏感性将使研究人员能够通过分析弱磁性沉积物的分析，重新迁移的火山以及非常小的样本来推动现场的领域，以及非常小的样本，以及诸如生物学标本，例如特殊的，化学保留和纯粹的矿物质奖励，并在纯粹的矿床上进行了质疑，并且已经反映了NSF的宣告。优点和更广泛的影响审查标准。