Sediment Matrix Control of Magnetization: Effects on Inclination Error and Intensity

来自海洋和大陆的沉积物是记录地磁场方向和强度波动的宝贵资料。这些沉积物的古定向研究对磁地层学、大陆边缘增生构造学以及导致地磁场反转和长期变化的岩心过程都做出了重要贡献。可靠的古强度数据为磁地层学研究提供了新的高分辨率工具，并为解释地磁倒转和长期变化的独特地磁场模型描述提供了约束。本研究将阐明粘土和二氧化硅含量对记录的海洋沉积物自然剩余磁化方向和强度的重要影响，并开展室内和野外相结合的研究，以建立更好的海洋沉积物磁化采集模型，设计更可靠的沉积物地磁古强度提取技术。

Sediments from oceans and continents constitute a valuable recorder for fluctuations of geomagnetic field direction and intensity. Paleodirectional studies from such sediments have made important contributions to magnetostratigraphy, continental margin accretionary tectonics, and to core processes which lead to reversals and secular variation of the geomagnetic field. Reliable paleointensity data can provide a new higher resolution tool for magnetostratigraphy and constraints for unique descriptions of geomagnetic field models to explain reversals and secular variation. This study will elucidate important effects of clay and silica content on the recorded paleodirection and intensity of natural remanent magnetization (NRM) and carry out a combined laboratory and field study to develop a better acquisition model for ocean sediment magnetization and design more reliable techniques for extracting geomagnetic paleointensity from sediments.