Analysis of the Natural DRM/PDRM Lock-In Process in Box- Cored Deep-Sea Sediments

调查人员将直接测量 分布沿着自然沉积的深海沉积物 在表面获得自然的回复磁化 沉积层 调查人员将研究 这种剩磁锁定分布和相关的岩石 磁性和沉积特征，在一套定向 在加州大陆盆地中采集的盒式岩心 边境和巴顿悬崖外的深海。 这些盒芯是在以前的NSF/资助的试点中收集的 进行类似的研究。 的结果 初步研究表明，一个有效的方法，估计十锁定 深度和其他有趣的事实 沉积物获得磁化。 本研究 调查人员还建议收集盒芯， 对生物扰动和非生物扰动地区进行采样， 沉积速率从约2至50 cm/ky不等。 通过 结合剩磁锁定分布的测量 随着对海底混合和沉积作用的研究， 自然环境，希望从根本上 将作出贡献，以了解收购 沉积物中的自然磁化

The investigators will directly measure the depth distribution along which naturally-deposited deep-sea sediments acquire their natural remanent magnetization in the surficial layers of sedimentary deposits. The investigators will study this remanence-lock-in distribution, and associated rock- magnetic and sedimentary characteristic, in a suite of oriented box-cores collected in basins of the California Continental Borderland and in the deep ocean beyond the Patton Escarpment. These box cores were collected in a previously NSF/funded pilot study for a similar kind of research. The results of this pilot study show a valid methodology for estimating ten lock-in depths and other interesting facts about the process of how sediments acquire magnetization. In this study, the investigators also propose to collect box-cores that will sample both bioturbated and non-bioturbated localities with sedimentation rates which vary from about 2 to 50 cm/ky. By combing the measurement of the remanence-lock-in distribution with the study of benthic mixing and sedimentation in the natural environment, it is hoped that a fundamental contribution will be made in understanding of acquisition of natural remanent magnetization in sediment.