Collecting Micrometeorites from the South Pole Wate Well

从南极水井收集微陨石

• 批准号: 9909694
• 负责人: Susan Taylor
• 金额: $ 8.66万
• 依托单位: Department of Army Cold Regions Research & Engineering Lab
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909694&HistoricalAwards=false
• 关键词: Collecting; Micrometeorites; South; Pole; Wate

9909694TaylorThis award provides support for funding to collect micrometeorites from the South Pole Water Well (SPWW) before it is closed in 2002. In 1995, thousands of micrometeorites were collected from the bottom of the well and a precise flux and mass distribution for 50-700 micron cosmic spherules (melted micrometeorites) for 1100-1500 A.D was determined. The new collection will allow the P.I.s to verify that the central plateau preserves the original surface flux of micrometeorites, quantify both melted and unmelted micrometeorites for the 400-1100 A.D. time frame, determine the flux for 1-50 micron interplanetary dust particles (IDP's) and assess whether they are a subclass of micrometeorites or derive from different cosmic sources, quantify variations (if any) in the flux or compositional distribution of micrometeorites on 10-100 year time scales and recover as many micrometeorites from the SPWW as possible. In addition to micrometeorites, the P.I.s propose to collect diatoms, opal phytoliths and terrestrial mineral grains from the well. Such collections will help researchers determine the sources of terrestrial particles landing on the Antarctic plateau. Arrangements have been made for Johnson Space Center (JSC)/NASA to curate the samples and make them readily available to researchers in earth and planetary sciences.

9909694泰勒该奖项提供资金支持，在2002年南极水井（SPWW）关闭之前收集微陨石。 1995年，从井底收集了数千颗微陨石，并确定了公元1100-1500年50-700微米宇宙球粒（熔化的微陨石）的精确流量和质量分布。 新的收集将允许PI验证中央高原保留微陨石的原始表面通量，量化400-1100 A.D.时间范围内熔化和未熔化的微陨石，确定1-50微米行星际尘埃颗粒（IDP）的通量并评估它们是否是微陨石的子类或来自不同的宇宙来源，在10-100年的时间尺度上量化微陨石流量或成分分布的变化（如果有的话），并从SPWW中回收尽可能多的微陨石。 除了微陨石，P.I.s还建议从井中收集硅藻、蛋白石植硅石和陆地矿物颗粒。 这些收集将有助于研究人员确定降落在南极高原上的陆地粒子的来源。 已安排约翰逊航天中心/美国航天局对样品进行管理，并使地球和行星科学的研究人员随时可以使用。