A geomagnetic excursion in the Brunhes epoch recorded in New Zealand basalts
A geomagnetic excursion in the Brunhes epoch recorded in New Zealand basalts
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新西兰玄武岩记录的布鲁赫斯时代的地磁偏移
DOI：
10.1016/0012-821x(92)90167-t
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发表时间：
1992
影响因子：
5.3
通讯作者：
T. Itaya
中科院分区：
文献类型：
--
作者：
H. Shibuya;J. Cassidy;I. Smith;T. Itaya
新西兰奥克兰火山场的碱性玄武岩熔岩的热剩磁（TRM）记录了异常地磁方向。各个喷发中心的不同地点和几个不同中心的地点的古地磁方向的一致性，以及与整个区域相比，其年龄跨度相对较短，表明这些异常方向具有地磁起源。这些方向的日期大约在 25 ka 到 50 ka 之间，并不代表地磁场完全反转，而是被解释为偏移。据报道，从南半球出发的旅行很少；这是从火成岩中发现的第一个此类记录，进一步支持了偏移是全球现象的观点。这里的游览活动暂时与蒙戈湖、莫诺湖和拉尚姆报道的游览活动相关。
Anomalous geomagnetic directions are recorded in the thermoremanent magnetisation (TRM) of alkali basalt lavas from the Auckland volcanic field, New Zealand. The concordance of paleomagnetic directions both in different sites from individual eruptive centres and in sites from several different centres, as well as their relatively short age span compared with that of the field as a whole, indicates that these anomalous directions have a geomagnetic origin. The directions, which are dated between approximately 25 ka and 50 ka, do not represent full reversals of the geomagnetic field and are interpreted as excursions. Very few excursions have been reported from the Southern Hemisphere; this is the first such record known from igneous rocks and further supports the notion that excursions are global phenomena. The excursions here are tentatively correlated with those reported from Lake Mungo, Mono Lake and Laschamp.
南极洲麦克默多火山岩的古强度研究
DOI：
--
发表时间：
2006
期刊：
東洋大学紀要 自然科学篇 50
影响因子：
--
作者：
川幡穂高;西 弘嗣;丸山俊明;大和田正明;水上正勝;Naoko UENO ほか1名
通讯作者：
Naoko UENO ほか1名