由碳化融化形成的地边缘富含硫化物的大陆根
Chunfei Chen1, Michael W Förster2,3, Svyatoslav S Shcheka2
1State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan, China. chfchen2016@hotmail.com.
Nature
|January 8, 2025
概括
碳酸融化在深层大陆根部集中硫,形成硫化物丰富的区域,对金属矿石形成至关重要. 这项研究揭示了这些过程如何丰富地带,
科学领域:
- 地质化学
- 经济地质学
- 石油学
背景情况:
- 石地含有大量的金属 (黄金,铜,稀土).
- 底层的石化层中含有丰富的挥发物,如碳,硫和水.
- 这些挥发性物质在金属缩中的分布和作用仍未得到充分研究.
研究的目的:
- 研究岩层地幔中硫和铜的分布.
- 确定碳酸在金属生成中的作用.
- 解释金属的丰富和硫化物丰富的根的形成.
主要方法:
- 全球矿硫和铜数据的汇编.
- 在碳酸上进行高压石油实验.
- 分析融化的演变和挥发性.
主要成果:
- 鉴定了硫化物和铜丰富的大陆根在160-190公里的深度附近的边缘.
- 碳酸融化物演变为碳酸,集中在地边缘.
- 化SiO2的减少导致硫沉,形成富含硫化物的根.
结论:
- 碳酸在缩硫和形成深层硫化物储存中起着至关重要的作用.
- 融化迁移解释了金属沉积物与碳酸盐在坑边缘附近的共同位置.
- 这些发现为探索金属矿石矿床提供了新的框架.
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