欧同位素分离和水热变化
Seung-Gu Lee1, ShuangShuang Chen2, Tae Jong Lee3
1Geological Survey Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, 34132, Korea. sgl@kigam.re.kr.
Scientific reports
|August 7, 2025
概括
欧 (Eu) 的同位素比率显示了岩石火山岩中的显著变化. 水热反应,而不仅仅是岩分化,导致Eu同位素分化,影响地球系统进化理解.
科学领域:
- 地质化学 地质化学
- 同位素地球化学 同位素地球化学
- 地球系统科学 地球系统科学
背景情况:
- 来自地结晶的欧欧 (Eu) 异常提供了关于岩演变的见解.
- 欧同位素分离 (δ153Eu) 和它与欧同位素异常的联系是一个不断增长的研究领域.
- 了解欧同位素变异是解读地球系统过程的关键.
研究的目的:
- 为了研究岩火山岩中Eu同位素比率的巨大变化.
- 在地质样本中探索影响Eu同位素分离的因素.
- 评估水热反应在Eu同位素特征中的作用.
主要方法:
- 使用多采集器感应合等离子体质谱学精确确定Eu同位素比.
- 使用一个Samarium (Sm) 内部标准进行准确的测量.
- 分析了来自朝鲜半岛和ODP地点801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.801C.
主要成果:
- 观察到岩火山岩的δ153Eu值的显著变化.
- 经过热水变化的性岩石岩石显示 δ153Eu 值在 -0.65 ‰ 到 -0.1 ‰ 之间.
- 新鲜的亚岩地形火山岩石表现出较窄的δ153Eu值范围 (-0.1‰至0.1‰).
结论:
- 欧同位素分离受到超越岩分化的过程的影响.
- 水热反应在改变Eu同位素比率方面发挥着重要作用.
- 这一发现扩大了我们对地球系统进化中的地化学痕迹的理解.
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