Evaluating the scatter of Detrital Remanent Magnetizations and its effects on relative paleointensity estimates.

地磁场的记录来自火成岩和沉积岩，以及某些考古文物。沉积岩序列在时间上是连续的，可以更好地描述磁场的演化，但也有一个局限的缺点，即只能提供相对的地磁强度记录，而不能提供绝对的地磁强度记录。此外，沉积物会受到偏差的影响，从而影响磁性颗粒的最终分布和记录的磁化强度。虽然存在有效的校正技术来消除明显的沉积物磁记录偏差，但迄今为止，这些技术尚未用于进一步校正相对古强度记录。在实验室控制的磁场中进行一系列沉积实验，并纠正已知的偏差，有可能改善对相对古强度的估计。这些改进将大大有助于我们了解地磁场的演变，从而了解地球动力学的历史和地球内部的形成。尽管进行了大量的研究，碎屑剩磁（DRM）可能仍然是最不了解的剩磁类型。沉积记录在古地磁学中的重要性值得我们持续努力，以充分了解沉积物如何获得磁化以及它们如何准确地记录地磁场。DRM在提供磁场强度记录方面的效率有限：单个磁粒子方向的可变散射导致平均矢量保持环境场的平均方向，但通常不是其倾角；重要的是，结果向量长度依赖于散射，极大地影响相对古强度（RPI）估计。磁各向异性为粒子分布的散射提供了有用的测量方法：通过在受控磁场下进行的沉积实验中获得的磁各向异性的测量，将评估环境场方向和强度对粒子散射的影响。磁各向异性将通过恢复方向和倾角的分布来纠正不对准偏差。反过来，这允许恢复磁化强度，允许研究RPI的新方法。提出了两种方法：第一种方法利用各向异性校正磁化来提供RPI估计，而第二种方法将利用每组实验的校正平均结果向量作为磁化强度的代理。由于磁场强度和磁场倾角依赖于倾角误差，因此期望校正后的磁化强度和由此产生的矢量能够产生更一致的RPI估计。由此产生的矢量方法如果成功，将提供提供RPI估计的一种简化的、更适用的方法。

Records of the geomagnetic field are derived from both igneous and sedimentary rocks, together with certain archeological artifacts. Sedimentary rock sequences are continuous through time, and provide a better picture of the magnetic field's evolution, but bear the limiting disadvantage of only providing relative, rather than absoltute, geomagnetic intensity records. Additionally, sediments are subject to biases, which affect the final distributions of the magnetic particles and the recorded magnetization. While valid correction techniques exist to obviate for notable sediment magnetic-recording biases, to date these are not used to further correct the relative paleointensity records. Conducting a series of deposition experiments in laboratory-controlled magnetic fields, and correcting for the known biases has the potential of improving estimates of relative paleointensity. These improvements would significantly contribute to our understanding of the evolution of the geomagnetic field, and therefore the history of the geodynamo and the formation of the earths interior.Despite the vast amount of research, detrital remanent magnetization (DRM) probably remains the most poorly understood type of magnetic remanence. The importance of sedimentary records in paleomagnetism warrants a sustained effort in fully understanding how sediments acquire their magnetization and how accurately they record the geomagnetic field. The efficiency of DRM is limiting in providing records of magnetic field intensity: the variable scatter of individual magnetic particle directions results in a mean vector that maintains the average orientation of the ambient field but often not its inclination; importantly, the resultant vector length is dependent on the scatter, greatly affecting relative paleointensity (RPI) estimates. Magnetic anisotropy provides a useful measurement of the scatter of particle distributions: through measurements of magnetic anisotropy obtained from deposition experiments conducted in controlled magnetic fields, the effect of the ambient field direction and intensity on particle scatter will be evaluated. Magnetic anisotropy will be used to correct for misalignment biases by restoring the distribution of directions and inclinations. In turn, this allows restoring the intensity of magnetization, permitting a novel approach of investigating RPI. Two approaches are proposed: the first utilizes the anisotropy-corrected magnetizations to provide RPI estimates, while the second will instead utilize the corrected mean resultant vector of each group of experiments as a proxy for the magnetization intensity. The expectation is that the corrected magnetizations and resultant vectors yield more consistent RPI estimates, owing to the field-strength and field-inclination dependence on the inclination error. The resultant vector approach, if successful, would provide a simplified, more applicable means of providing RPI estimates.