Geomagnetic excursions and their paleomagnetic record
Geomagnetic excursions and their paleomagnetic record
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DOI：
10.1029/rg015i002p00145
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发表时间：
1977-05
影响因子：
25.2
通讯作者：
K. Verosub;Subir K. Banerjee
中科院分区：
文献类型：
--
作者：
K. Verosub;Subir K. Banerjee
近期湖泊和海洋沉积物的古地磁记录包含异常的磁方向，这些方向已被解释为地磁场的大规模波动（偏移）。鉴于古地磁记录过程的孤立扭曲可能以多种方式出现，偏移存在的证据必须依赖于给定湖泊或海洋环境以及邻近沉积环境内的一致结果。对拟议的偏离的严格审查表明，尽管某些偏离可能确实发生，但尚未有足够的证据证实许多声称的偏离的存在。当确定区域或全球偏移的存在时，将获得关于地磁场性质、偏移作为时间地层层的用途以及地磁活动与气候变化之间可能的相关性的附加信息。
The paleomagnetic record of recent lake and marine sediments contains anomalous magnetic directions which have been interpreted as large-scale fluctuations of the geomagnetic field (excursions). In view of the many ways in which isolated distortions of the paleomagnetic recording process can arise, proof of the existence of an excursion must depend on consistent results from within a given lake or marine environment as well as from adjacent sedimentary environments. A critical review of the proposed excursions reveals that although some excursions probably did occur, there is not yet sufficient evidence to confirm the existence of many of the claimed excursions. When the existence of regional or global excursions is established, additional information will become available on the nature of the geomagnetic field, on the use of excursions as time-stratigraphic horizons, and on possible correlations between geomagnetic activity and climatic change.