可靠的古地磁的早期测量方向如何?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 10 - t01:23:29z //www.hoelymoley.com/feeds/question/4632 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/4632 24 可靠的古地磁的早期测量方向如何? 桥 //www.hoelymoley.com/users/94 2015 - 03 - 31 - t18:43:08z 2018 - 10 - 10 - t16:41:51z < p >古地磁的研究方法和设备通常在1960年代和1970年代,而原始的以今天的标准来看。例如,Doell和考克斯(1967)暗示的标准程序得到一个古地磁的方向只是测量天然剩余磁化强度,并假设它代表了一个可靠的初级磁化方向如果它被证明是足够抵抗一个或多个标准的退磁技术。< / p > < p >相比之下,在一个现代的古地磁的研究中,我期望一个更加精细的方法:十个或十个以上的房颤或热退磁步骤每个样本(可能与试点研究比较的有效性退磁方法),测量剩余的剩磁每一步;检查各预测的数据;古地磁的方向拟合得到的一个或多个退磁组件使用,例如,PCA (Kirschvink, 1980), Linefind (Kent et al ., 1983),或某种形式的大圆交叉分析(例如麦克费登,McElhinny, 1988);和岩石磁工作(例如矫顽力频谱分析)提供一个更好的主意携带的磁化,当和磁化组件是如何形成的。稳定性测试如折叠测试或逆转测试也可能被用来检查剩余的可靠性。< / p > < p >在这种背景下,我记得有一次被告知一些大比例(每分的)的古地磁的方向决定在田间的早期随后被无效当网站和样本重新分析使用现代方法。我偶尔遇到个别研究明确无效早期; for example, Turner et al. (1989) revised the findings of Kennett and Watkins (1974), citing ‘serious errors in the interpretation of the results’.

I've never come across a published study which attempts a quantitative survey of how often such invalidations occur. Does anyone know of any publications which provide such a review of early palaeomagnetic studies and their reproducibility -- or lack thereof?

Doell, R. R. and Cox, A. (1967). Analysis of palaeomagnetic data. In Collinson, D. W., Creer, K. M. and Runcorn, S. K., editors, Methods in Palaeomagnetism, number 3 in Developments in Solid Earth Geophysics, pages 340–346. Amsterdam: Elsevier.

Kennett, J. P., & Watkins, N. D. (1974). Late Miocene—Early Pliocene paleomagnetic stratigraphy, paleoclimatology, and biostratigraphy in New Zealand. Geological Society of America Bulletin, 85(9), 1385-1398.

Kent, J. T., Briden, J. C., & Mardia, K. V. (1983). Linear and planar structure in ordered multivariate data as applied to progressive demagnetization of palaeomagnetic remanence. Geophysical Journal International, 75(3), 593-621.

Kirschvink, J. L. (1980). The least-squares line and plane and the analysis of palaeomagnetic data. Geophysical Journal International, 62(3), 699-718.

McFadden, P. L., & McElhinny, M. W. (1988). The combined analysis of remagnetization circles and direct observations in palaeomagnetism. Earth and Planetary Science Letters, 87(1), 161-172.

Turner, G. M., Roberts, A. P., Laj, C., Kissel, C., Mazaud, A., Guitton, S., & Christoffel, D. A. (1989). New paleomagnetic results from Blind River: Revised magnetostratigraphy and tectonic rotation of the Marlborough region, South Island, New Zealand. New Zealand journal of geology and geophysics, 32(2), 191-196.
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