Plate-tectonic reconstructions predict part of the Hawaiian hotspot track to be preserved in the Bering Sea
Plate-tectonic reconstructions predict part of the Hawaiian hotspot track to be preserved in the Bering Sea
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板块构造重建预测夏威夷热点轨迹的一部分将在白令海中保存下来
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
C. Gaina
中科院分区：
文献类型：
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作者：
B. Steinberger;C. Gaina
我们使用板块重建来显示夏威夷热点的部分轨迹。80-白令海可能保存90 Ma年龄。根据这些重建，夏威夷热点在约公元前位于Izanagi板块之下。83 Ma.大约在那个时候，携带热点轨道的板块部分被转移到库拉板块。75-80 Ma后，夏威夷热点覆盖太平洋板块.大约40-55 Ma，俯冲开始于阿留申海沟。库拉板块的一部分与北美板块相连，并作为白令海的海洋部分保存下来。我们发现，对于一些不同的板块重建和各种假设涵盖热点运动，部分热点轨道应保存在白令海。预测的轨道的年龄取决于阿留申俯冲开始的年龄。我们推测鲍尔斯和希尔绍夫岭是由古夏威夷热点岩浆作用形成的。
We use plate reconstructions to show that parts of the Hawaiian hotspot track of ca. 80– 90 Ma age could be preserved in the Bering Sea. Based on these reconstructions, the Hawaiian hotspot was beneath the Izanagi plate before ca. 83 Ma. Around that time, the part of the plate carrying the hotspot track was transferred to the Kula plate. After 75–80 Ma the Hawaiian hotspot underlay the Pacifi c plate. Circa 40–55 Ma, subduction initiated in the Aleutian Trench. Part of the Kula plate was attached to the North American plate and is preserved as the oceanic part of the Bering Sea. We show that for a number of different plate reconstructions and a variety of assumptions covering hotspot motion, part of the hotspot track should be preserved in the Bering Sea. The predicted age of the track depends on the age of Aleutian subduction initiation. We speculate that Bowers and Shirshov Ridges were formed by paleoHawaiian hotspot magmatism.