Migration of volcanism with time in the Marquesas Islands, French Polynesia
Migration of volcanism with time in the Marquesas Islands, French Polynesia
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法属波利尼西亚马克萨斯群岛火山活动随时间的迁移
DOI：
10.1016/0012-821x(74)90181-2
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发表时间：
1974
影响因子：
5.3
通讯作者：
I. Mcdougall
中科院分区：
文献类型：
--
作者：
R. Duncan;I. Mcdougall
用K-Ar法测定了太平洋东南部马克萨斯岛链上5个岛屿的样品，结果显示火山从西北向东南的迁移速率为9.9 cm/yr。这种运动方向相同，但与南岛链（速率较低）和夏威夷岛链（速率相当高）造成的运动幅度中等。如果太平洋板块过去5年的旋转极位于55°S， 170°E附近，那么马克萨斯群岛火山活动的迁移速度与太平洋板块在固定“热点”或地幔“羽流”上的刚性运动模式是一致的。
Samples from five islands of the Marquesas Island chain (southeast Pacific Ocean) have been dated by the K-Ar method and exhibit a northwest to southeast volcanic migration rate of 9.9 cm/yr. This movement is in the same direction but of intermediate magnitude to results from the Austral Island chain (lower rate) and the Hawaiian Island chain (considerably higher rate). The rate of migration of volcanism in the Marquesas Islands is consistent with the model of rigid Pacific plate movement over a fixed “hot spot” or mantle “plume” provided that the pole of rotation for the Pacific plate for the last 5 my is located near 55°S, 170°E.