Morphology of Reversal Transition Fields

9814965富勒国际公司建议测试ODP型先进活塞取心岩心反转记录的可靠性。这是一个巨大的潜在的反转记录储集库，但有人一再表示，这些沉积物记录是异常的，不可靠。第一个目标将是通过比较偏离中心的样品以及特定反转的档案和工作半记录来测试径向叠印。第二个阶段将是通过测试接近反转的正常和反转部分的反足来寻找重叠。最后，利用主成分分析对单个过渡样品进行AF和热退磁处理。磁化率的各向异性和无滞后剩磁将被用来防止磁组构对记录的方向的混杂影响。为了确定反转的相对强度，将通过磁化率、无滞后剩磁和饱和等温剩磁进行归一化。这项工作的结果将是一套记录在案的特定反转记录的测试，可广泛用于评估消耗臭氧潜能值沉积物记录的保真度。这一结果还将涉及一个重要问题，即来自ODP值岩芯的相对强度记录的保真度问题。

9814965 Fuller The PI proposes to test the reliability of records of reversals from ODP advanced piston coring (APC) cores. This is an enormous potential reservoir of reversals records, but there have been repeated suggestions that these sediment records are anomalous and cannot be relied upon. The first target will be to test for radial overprints using comparison between off center samples and between archive and working half records of particular reversals. The second stage will be to look for overprints by testing for antipodality in normal and reversed sections close to reversals. Finally, the individual transitional samples will be subjected to AF and thermal demagnetization with principal component analysis. Anisotropy of susceptibility and anhysteretic remanence will be used to check against the confounding effect of magnetic fabric on the directions recorded. To determine relative intensity across the reversals, normalization will be by susceptibility, anhysteretic remanence and saturation isothernal remanence. The result of this work will be a set of documented tests of particular reversal records that can be widely used to assess the fidelity of ODP sediment records. The results will also bear upon the important question of the fidelity of relative intensity records from ODP cores.