Dispersed rhyolitic tephra from New Zealand in deep-sea sediments of the Southern Ocean
Dispersed rhyolitic tephra from New Zealand in deep-sea sediments of the Southern Ocean
复制标题
南大洋深海沉积物中来自新西兰的分散流纹岩火山灰
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
D. Seward
中科院分区：
文献类型：
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作者：
P. Kyle;D. Seward
从南大洋南太平洋部分采集的深海活塞岩心中的分散流纹岩火山灰，以前被认为是来自南极洲的Balleny群岛。材料的化学成分表明，新西兰的来源更有可能。这些深海火山碎屑层的古地磁测定年龄与Wanganui盆地和新西兰Cape Kidnappers火山碎屑序列中火山玻璃和锆石的裂变径迹年龄之间存在很强的相关性。相关性表明火山喷发点在新西兰东部和南部延伸了5000多公里。
Dispersed rhyolitic tephra in deep-sea piston cores collected from the South Pacific sector of the Southern Ocean have previously been considered to originate from the Balleny Islands, Antarctica. Chemical composition of the materials suggests that a source in New Zealand is more likely. A strong correlation exists between paleomagnetically determined ages for these deep-sea tephra layers and fission-track ages determined on volcanic glasses and zircons from tephra sequences in Wanganui Basin and Cape Kidnappers, New Zealand. The correlation suggests that the tephra extend more than 5000 km east and south of New Zealand.