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，并且提供了磁场演化的更好的图像，但是具有仅提供相对而不是绝对的地磁强度记录的限制性缺点。此外，沉积物受到偏置，这会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显著的沉积物磁记录偏差，但迄今为止，这些技术还没有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，并对已知的偏差进行校正，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理解地磁场的演变，从而地球发电机的历史和地球内部的形成。尽管有大量的研究，碎屑剩磁（DRM）可能仍然是最不了解的剩磁类型。沉积物记录在古地磁学中的重要性要求我们持续努力，充分了解沉积物是如何获得磁化的，以及它们记录地磁场的准确性如何。DRM在提供磁场强度记录方面的效率有限：单个磁性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，但通常不是其倾斜度;重要的是，合成矢量长度取决于散射，极大地影响相对古强度（RPI）估计。磁各向异性提供了一个有用的测量粒子分布的散射：通过测量的磁各向异性从沉积实验中进行的受控磁场，环境场的方向和强度对粒子散射的影响进行评估。磁各向异性将用于通过恢复方向和倾角的分布来校正未对准偏差。反过来，这允许恢复磁化强度，允许研究RPI的新方法。提出了两种办法：第一种方法利用各向异性校正的磁化强度来提供RPI估计，而第二种方法则利用每组实验的校正平均合成矢量作为磁化强度的代表。由于磁场强度和磁场倾角依赖于倾角误差，因此预期校正的磁化强度和合成矢量产生更一致的RPI估计。合成矢量法如果成功，将提供一种简化的、更适用的方法来提供零售物价指数估计数。

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.