摘要
根据对华北克拉通汉诺坝和女山两个捕虏体产地的麻粒岩和橄榄岩的FTIR实验测定,分析讨论了大陆深部岩石圈内水含量和分布上的一些显著特点.结果表明,大陆下地壳和岩石圈内矿物的水含量无论在横向还是垂向分布上都是明显不均一的,造成这些不均一性的机制可能复杂多样.
Water of nominally anhydrous minerals in lower crustal granulite xenoliths and mantle peridotite xenoliths from Hannuoba and Nushan, North China Craton, were investigated by FTIR. The results show that the nominally anhydrous clinopyroxene, orthopyroxene and plagioclase in these samples can contain trace amounts of water dominated by OH. Based on these water data, the distribution of water in the lower crust and upper mantle and between them was discussed, respectively. It is indicated that water content in the deep continental lithosphere, including the deep crust and upper mantle, is laterally and vertically heterogeneous. Possible origins accounting for these heterogeneities were also discussed.
基金
国家自然科学基金(40673028
40473007)
中法先进研究计划(PRAT06-02)
教育部"新世纪优秀人才支持计划"
中国科学院研究生科学与社会实践项目
中国科学技术大学研究生创新基金资助
