Earth Sciences Postdoctoral Research Fellowship Award

地球科学博士后研究奖学金

• 批准号: 9704651
• 负责人: Stephen Mojzsis
• 金额: $ 7.2万
• 依托单位: Fellowships
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9704651&HistoricalAwards=false
• 关键词: Earth; Sciences; Postdoctoral; Research; Fellowship

9704651 Mojzsis2 The P.I. will examine a sample of the aqueous alteration lithologies of the ALH 84001 meteorite (McKay et al., 1996) and determine the phosphate mineralogy and inclusion compositions contained within it. The other martian meteorite containing obvious aqueous mineral assemblages, the EET79001 meteorite (Gooding et al., 1988), was affected by chemically active aqueous solutions. Geological evidence derived from remotely sensed data pointing to abundant liquid water in the past on Mars include large-scale remnant hydrologic features such as outflow channels, valley networks, drainage systems, lake deposits, possible ancient seas, and even glaciated terrain. Carbonates and other salts could have precipitated out of water at the surface in equilibrium with an ancient atmosphere on Mars before climatic conditions fell below the stability field of liquid water. Low temperature mineral assemblages contain direct information about their medium of precipitation, and aqueous mineral formation may have contained at depth or in a hydrothermal regime on Mars until heat from volcanism ceased; the pressure and temperature conditions would tend in these cases to satisfy the stability of liquid water.

9704651 Mojzsis2 P.I.将检查 ALH 84001 陨石的水蚀变岩性样本（McKay 等人，1996）并确定其中包含的磷酸盐矿物学和包裹体成分。 另一颗含有明显水相矿物组合的火星陨石 EET79001 陨石（Gooding 等，1988）受到化学活性水溶液的影响。 来自遥感数据的地质证据表明火星过去存在丰富的液态水，包括大规模的残留水文特征，例如流出通道、山谷网络、排水系统、湖泊沉积物、可能的古海洋，甚至冰川地形。 在气候条件低于液态水的稳定场之前，碳酸盐和其他盐可能会从火星表面的水中沉淀出来，与火星上古老的大气保持平衡。 低温矿物组合包含有关其降水介质的直接信息，并且水成矿物可能包含在火星深处或热液区域中，直到火山活动的热量停止为止；在这些情况下，压力和温度条件往往会满足液态水的稳定性。