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New Method of Dating Oceanic Crust Most Accurate So Far

机译:迄今为止最准确的约会洋壳的新方法

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摘要

A newly developed method that detects tiny bits of zircon in rock is also said to reliably predict the age of ocean crust more than 99 percent of the time.After collecting zircon-bearing samples of ocean crust,scientists used a sensitive high-resolution ion micro probe to determine the absolute ages of 17 samples from the Atlantis Bank,about 75 miles south of the Southwest Indian Ridge in the southern Indian Ocean.Around 25 percent of the samples were 2.5 million years older than predicted by conventional models of crust generation at mid-ocean ridges.
机译:据称,一种新开发的检测岩石中微小锆石的方法还可以在99%的时间内可靠地预测洋壳的年龄。在收集了含锆石的洋壳样本后,科学家们使用了灵敏的高分辨率离子显微技术探测以确定来自印度洋南部西南印第安海岭以南约75英里的亚特兰提斯银行的17个样本的绝对年龄。大约25%的样本比中期传统地壳生成模型预测的年龄大250万年洋脊。

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