Collecting Micrometeorites from the South Pole Wate Well

9909694泰勒该奖项为在2002年南极水井关闭前收集微陨石提供资金支持。1995年，从井底采集了数以千计的微陨石，测定了公元1100-1500年50-700微米宇宙球体(熔融的微陨石)的精确流量和质量分布。新的收集将使PI.S能够核实中央高原保存了微陨石的原始表面通量，量化了公元400-1100年的熔融和未融化的微陨石，确定了1-50微米星际尘埃粒子(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，量化微陨石在10-100年时间尺度上的通量或成分分布的变化(如果有)，并从SPWW中恢复尽可能多的微陨石。除了微陨石，P.I.计划从油井中收集硅藻、蛋白石植硅体和陆地矿物颗粒。这样的收集将帮助研究人员确定降落在南极高原上的陆地粒子的来源。已经安排约翰逊空间中心(JSC)/美国国家航空航天局(NASA)对样品进行整理，以便地球和行星科学的研究人员随时可以使用。

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.