Evidence for two shield volcanoes exposed on the island of Kauai, Hawaii

被引:0
|
作者
Holcomb, RT [1 ]
Reiners, PW [1 ]
Nelson, BK [1 ]
Sawyer, NLE [1 ]
机构
[1] UNIV WASHINGTON,DEPT GEOL SCI,SEATTLE,WA 98195
关键词
D O I
10.1130/0091-7613(1997)025<0811:EFTSVE>2.3.CO;2
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The island of Kauai has always been interpreted as a single shield volcano, but lavas of previously correlated reversed-to-normal magnetic-polarity transitions on opposite sides of the island differ significantly in isotopic composition. Samples from west Kauai have Sr-87/Sr-86 < 0.7037, epsilon(Nd) greater than or equal to 6.14, and Pb-206/Pb-204 > 18.25; samples from east Kauai have Sr-87/Sr-86 > 0.7037, epsilon(Nd) less than or equal to 6.14, and Pb-206/Pb-204 < 18.25. Available data suggest that a younger eastern shield grew on the collapsed flank of an older western one.
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页码:811 / 814
页数:4
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