Ivory coast microtektites and geomagnetic reversals
Ivory coast microtektites and geomagnetic reversals
复制标题
象牙海岸微玻璃陨石和地磁反转
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
D. Kent
中科院分区：
文献类型：
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作者：
D. Schneider;D. Kent
据报道，科特迪瓦微陨石的出现与哈拉米洛正极性亚时线的开始有关，这支持了撞击事件可以引起地磁倒转的观点。我们重新评价了含有象牙海岸微晶岩的两个关键深海沉积物岩心（K9-57和V27-239）的古地磁地层学，认为该事件可能发生在Jaramillo亚时（开始后约30ky，结束前约40ky）。因此，这个新的结果反驳了象牙海岸产生陨石事件与地磁极性反转之间的任何因果关系。
The reported association of the Ivory Coast microtektite occurrence with the onset of the Jaramillo normal polarity subchron has given support to the notion that impact events can give rise to geomagnetic reversals. We re-evaluate the paleomagnetic stratigraphy of two critical deep-sea sediment cores bearing Ivory Coast microtektites (K9-57 and V27-239) and show that this event likely occurred during the Jaramillo subchron approximately 30 kY after its onset and 40 kY before its termination. This new result thus argues against any causal relationship between the Ivory Coast tektite producing event and a geomagnetic polarity reversal.