Magnetic signature of all Martian meteorites (SNC)

所有火星陨石的磁特征 (SNC)

• 批准号: 18407023
• 负责人: Privatdozent Dr. Viktor Hoffmann
• 金额: --
• 依托单位: Arbeitsgruppe Geophysik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/18407023?language=en
• 关键词: Magnetic; signature; Martian; meteorites; SNC

Aim of the project is the systematic investigation of all Martian meteorites by paleo-, rock- and mineral magnetic means to identify the different mineral magnetic phases in these meteorites with special emphasis on iron containing sulfides and oxides carrying the record about the Martian magnetic field and crustal anomalies. Iron sulfides may also play an important role in the prebiotic phase of the origin of life: The identification and characterization of magnetic minerals in SNC meteorites may lead to a better understanding of the evolution of the Martian magnetic field, and the structure of the planet Mars as a whole, such as core-mantle-crust differentiation and its properties and development over time. The different SNC meteorites offer magnetic material of different ages beginning with the 4.5 Gyr-old SNC meteorite ALH84001. Shock metamorphism features on the magnetic phases will have to be taken into account as a result of the ejection of the SNC from Mars due to large impacts. Potential alteration effects due to processes on Mars as well as on Earth during the residence time will be studied in detail. Finally the SNC magnetic signature will be compared with and interpreted in terms of Mars mission/lander data in order to develop a more substantiated magneto-mineralogical model.

该项目的目的是通过古、岩石和矿物磁学手段对所有火星陨石进行系统调查，以确定这些陨石中的不同矿物磁相，特别是带有关于火星磁场和地壳异常记录的含铁硫化物和氧化物。在生命起源的生前阶段，硫化铁也可能发挥重要作用：对SNC陨石中磁性矿物的鉴定和表征可能有助于更好地了解火星磁场的演化，以及火星整体的结构，如核-地幔-壳的分化及其性质和随时间的发展。不同的SNC陨石提供了不同时代的磁性物质，从4.5 Gyr的SNC陨石ALH84001开始。由于SNC由于大的撞击而从火星弹出，因此必须考虑磁相上的冲击变质特征。将详细研究在火星和地球上的过程在停留时间内可能产生的变化影响。最后，将根据火星飞行任务/着陆器数据对SNC磁性特征进行比较和解释，以开发更确凿的磁矿物学模型。