30,000 years of hydrothermal activity at the Lost City vent field
30,000 years of hydrothermal activity at the Lost City vent field
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DOI：
10.1126/science.1085582
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发表时间：
2003-07-25
期刊：
影响因子：
56.9
通讯作者：
Proskurowski, G
中科院分区：
文献类型：
--
作者：
Früh-Green, GL;Kelley, DS;Proskurowski, G
锶、碳和氧同位素数据以及放射性碳年龄记录了至少3万年的热液活动，这些活动是由失落之城的蛇纹石化反应驱动的。据估计，在这个离轴油田下，蛇纹石化的发生速度至少为每年1.2x10（-4）立方公里。海水进入相对凉爽、新鲜的橄榄岩，再加上断层、体积膨胀和质量消耗过程，对维持这种系统至关重要。橄榄岩块的蛇纹岩化产生的热量，典型的缓慢和超低扩张环境，有可能在数十万年，甚至数百万年的时间里驱动失落之城类型的系统。
Strontium, carbon, and oxygen isotope data and radiocarbon ages document at least 30,000 years of hydrothermal activity driven by serpentinization reactions at Lost City. Serpentinization beneath this off-axis field is estimated to occur at a minimum rate of 1.2x10(-4) cubic kilometers per year. The access of seawater to relatively cool, fresh peridotite, coupled with faulting, volumetric expansion, and mass wasting processes, are crucial to sustain such systems. The amount of heat produced by serpentinization of peridotite massifs, typical of slow and ultraslow spreading environments, has the potential to drive Lost City-type systems for hundreds of thousands, possibly millions, of years.