Collaborative Research: Magnetofossils in Marine Sediments:Rock Magnetic experiments on artificial and Natural Samples

小行星9726884 海洋沉积物可以提供大陆沉积物或火山岩所不能提供的地磁场行为的连续记录。 由趋磁细菌产生的磁铁矿单磁畴颗粒被认为是海洋沉积物磁化强度的重要记录者。 然而，生物磁铁矿在磁化过程中的作用仍然知之甚少。 研究人员将根据岩石磁学的最新进展进行一系列实验，以测量海洋沉积物中磁化石的丰度和方向分布。 这些实验将有助于建立的作用（或缺乏）的磁性化石作为剩磁载体，趋磁细菌和沉积物氧化还原之间的联系，磁性化石保存的程度，以及这些因素之间的相互关系和锁定在海洋沉积物中的剩磁。 ***

9726884 Housen Marine sediments can provide continous records of geomagnetic field behavior that connot be obtained from continental sediments or volcanic rocks. Single-magnetic-domain particles of magnetite produced by magnetotactic bacteria have been proposed as important recorders of magnetization in marine sediments. Yet, the role of biogenic magnetite in the magnetization process remains poorly understood. The P. I.s will conduct a series of experiments based upon recent advances in rock-magnetism designed to measure the abundance and orientation-distribution of magnetofossils in marine sediments. These experiments will help to establish the role (or lack thereof) of magnetofossils as remanence carriers, links between magnetotactic bacteria and sediment redox, the degree of magnetofossil preservation, and the inter-relationships between these factors and the lock-in of magnetic remanence in marine sediments. ***