地球的海底地是通过融合构造形成的
Denggang Lu1, Jia Liu1, Qunke Xia1
1Research Center for Earth and Planetary Material Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310058, China.
National science review
|September 2, 2025
概括
早期的地球大陆地是状的,而不是状的,是通过融合构造形成的. 机器学习模型揭示了海底地的组成,有助于了解早期地质历史和古 TTG 岩石的形成.
科学领域:
- 地质化学
- 早期地球地质
- 石油学
背景情况:
- 了解海底洲是地球早期地质历史的关键.
- 来自杰克山的基石是海底地自然和形成的主要记录.
- 哈迪纪主体岩石和父母岩石的主要/微量元素组成受到争议,导致早期地演变的模两可.
研究的目的:
- 复制哈迪石的主要和微量元素度.
- 描述海底洲的石化性质和形成机制.
- 提出一个石化基因模型,用于古代的化石-化石-化石 (TTG) 岩石.
主要方法:
- 使用全球岩石和主岩石的综合数据集.
- 开发机器学习模型来预测父母的岩组成.
- 分析SiO2,K2O/Na2O和Sr/Y比率以推断地的特征.
主要成果:
- 哈迪亚洲的地含有58%至78%的SiO2.
- 地的石化结构是状的,主要由低压至中压的化石-化石-花化石 (TTG) 和性花岩组成,而不是化石.
- 父母岩来自地原地的部分融化,而海地起源于碰撞加厚的海洋地.
结论:
- 哈迪洲地的形成是由融合构造学解释的.
- 这项研究提供了古 TTG 岩石的石化模型.
- 这些发现澄清了地球早期地的性质和演变.
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