Experimental constraints on the magnetic mineralogy of Fe-Ti oxides in basalts from HSDP-2 bore hole

HSDP-2 钻孔玄武岩中 Fe-Ti 氧化物磁性矿物学的实验限制

• 批准号: 5423220
• 负责人: Professorin Dr. Dominique Lattard
• 金额: --
• 依托单位: Fakultät für Chemie und Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5423220?language=en
• 关键词: Experimental; constraints; magnetic; mineralogy; Fe

The Hawaiian Scientific Drilling Project (HSDP) provides an excellent opportunity to study the evolution of rock magnetism in relation to the growth history and magmatic evolution of a shield volcano. The main magmatic carriers in the basaltic rocks drilled from the HSDP-2 bore hole are the two Fe-Ti oxide minerals, titanomagnetite and ilmenite. The aim of the present project is to improve the correlations between magnetic properties and chemical-structural characteristics of these oxides at high (magmatic) temperatures, with an emphasis on titanomagnetite. The new data will contribute to a better understanding of rock magnetic properties of subaerial and submarine basaltic rocks that mainly build up the Hawaiian shield In a first stage we plan to determine characteristic magnetic parameters (e.g. Curie or Néel temperature, low-temperature behavior of the magnetic susceptibility, hysteresis parameters at room and low temperature) of synthetic Fe-Ti oxides equilibrated at high temperatures (1000-1150°C), with well-defined compositions (incl. vacancy concentrations) analogous to those in Hawaiian rocks. These new data will be applied especially to submarine samples recovered from the deep part of HSDP-2 that do not show late oxidation features.

夏威夷科学钻探计划（HSDP）提供了一个极好的机会，研究岩石磁性的演化与盾状火山的生长历史和岩浆演化。HSDP-2钻孔所钻玄武岩中的主要岩浆载体是钛磁铁矿和钛铁矿两种铁钛氧化物矿物。本项目的目的是改善这些氧化物在高温（岩浆）下的磁性和化学结构特征之间的相关性，重点是钛磁铁矿。新的数据将有助于更好地了解主要构成夏威夷地盾的陆上和海底玄武岩的岩石磁性。在第一阶段，我们计划确定特征磁性参数。（例如居里或内尔温度，磁化率的低温行为，在室温和低温下的滞后参数）的合成Fe-Ti氧化物在高温（1000-1150°C）下平衡，具有明确的组成（包括空位浓度）类似于夏威夷岩石中的那些。这些新的数据将特别适用于从HSDP-2深部回收的海底样品，这些样品不显示晚期氧化特征。

项目成果

Curie temperatures of synthetic titanomagnetites in the Fe‐Ti‐O system: Effects of composition, crystal chemistry, and thermomagnetic methods

• DOI: 10.1029/2006jb004591
• 发表时间: 2006-12
• 期刊: Journal of Geophysical Research
• 作者: D. Lattard;R. Engelmann;A. Kontny;U. Sauerzapf

Bestimmung diagnostischer magnetischer Übergangstemperaturen von synthetischen Titanomagnetiten und Ilmenit-Hämatit-Mischkristallen

合成钛磁铁矿和钛铁矿-赤铁矿混晶的诊断磁转变温度的测定

• DOI: 10.11588/heidok.00008392
• 发表时间: 2008
• 作者: Engelmann R