Development of a CO2 Laser System for Paleointensity Analyses of Single Plagioclase Crystals

开发用于单斜长石晶体古强度分析的 CO2 激光系统

• 批准号: 0091403
• 负责人: John Tarduno
• 金额: $ 4.18万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-15 至 2007-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0091403&HistoricalAwards=false
• 关键词: Development; CO2; Laser; System; Paleointensity

0091403Tarduno This award provides funding support for the development of a novel technique to measure the intensity of the earth's magnetic field in the past at the time of cooling of volcanic rocks. The method is based on the Thellier-Thellier analysis of magnetism in single grains of plagioclase feldspar crystals formed during cooling. A new CO2 laser heating system will permit in situ step-heating of single feldspar grains in petrographic thin sections during the analysis of paleomagnetic intensity and represents an advance in the reliability of the paleomagnetic measurement. Determining the intensity and direction of the earth's paleomagnetic field is a necessary tool for reconstructing past tectonic plate motions and gaining an understanding of past processes in the metallic core of the earth.***

0091403 Tarduno该奖项为开发一种新技术提供资金支持，该技术可以测量过去火山岩冷却时的地球磁场强度。该方法基于冷却过程中形成的斜长石晶体的单个颗粒中的Thellier-Thellier磁性分析。一种新的CO2激光加热系统将允许在岩相薄片中的单个长石颗粒在古地磁强度分析过程中原位步进加热，并代表了古地磁测量可靠性的进步。确定地球古磁场的强度和方向是重建过去构造板块运动和了解地球金属核过去过程的必要工具。