A theoretical treatment of paleointensity determination experiments on rocks containing pseudo-single or multi domain magnetic particles
A theoretical treatment of paleointensity determination experiments on rocks containing pseudo-single or multi domain magnetic particles
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DOI：
10.1016/s0012-821x(01)00313-2
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发表时间：
2001-05-30
影响因子：
5.3
通讯作者：
Fabian, K
中科院分区：
文献类型：
--
作者：
Fabian, K
热量磁化强度（TRM）的现象学理论用于使用thellier方法建模普莱斯强度测定实验的可能结果。结果表明，包含伪单个或多域颗粒的样品的Arai图的固有曲率可以仅归因于在其阻滞温度以下未经阻止的隔离的存在。因此，部分TRM（PTRM）的热消电尾不是直接衡量样品产生弯曲ARAI图的趋势。在这里，建议将PTRM（T-1，T-2）的前进衰减在加热期间已经出现在较低温度的T-1 <T-2以下作为更可靠的预选前标准。另外，平均磁静力相互作用对取oo实验的影响可忽略不计。一种扩展的thellier方法，将自然物磁化磁化的热消防与根据所应用的TRM理论的热磁力化与人工TRM的热磁化，即使没有发生变化或粘性效应，即使对于伪单个或多域样本，即使是伪单个或多域样本，也会导致完美的线性修改ARAI图。 （c）2001 Elsevier Science B.V.保留所有权利。
A phenomenological theory of thermoremanent magnetization (TRM) is applied to model the possible results of paleointensity determination experiments using the Thellier method. It is shown that intrinsic curvature of the Arai plot for samples containing pseudo-single or multi domain particles can be attributed exclusively to the presence of remanences which are unblocked below their blocking temperature. Thus the thermal demagnetization tail of partial TRM (pTRM) is not a direct measure for a sample's tendency to yield a curved Arai plot. Here it is proposed to use the advancing decay of a pTRM(T-1, T-2) which during heating occurs already below the lower temperature T-1 < T-2 as a more reliable pre-selection criterion. In addition, the effect of an average magnetostatic interaction on the Thellier experiment turns out to be negligible. An extended Thellier method which compares the thermal demagnetization of natural remanent magnetization with that of an artificial TRM according to the applied TRM theory should result in a perfectly linear modified Arai plot even for pseudo-single or multi domain samples if no alteration or viscous effects occur. (C) 2001 Elsevier Science B.V. All rights reserved.