摘要
在对水的相图、典型地区的地温曲线、矿物的脱水行为及一些矿物和岩石的含水量等研究的基础上指出 ,以 15 .5～ 2 5 .1km深度为界 ,在该深度以上的岩石圈浅部水是液态 ,而在该深度以下的岩石圈深部水是气态 ;水以矿物的结构水形式被带入到15 .5～ 2 5 .1km深度以下的岩石圈中 ;若矿物结构水完全脱出 ,在俯冲带中水临界温度至矿物脱结构水的极限温度相对应的区域内 (如秦岭 15 .5～ 6 4.0 km) ,平均含水量为 0 .5 %～ 1.0 %。讨论了在岩石圈深部矿物脱水作用与局部超高压环境、高导低速带之间的成因联系。
Based on the study of the mineral dehydration and the geothermal curves of typical areas and the phase diagram of water and the water contents of some mineral and rocks,the paper shows that water is liquid or vapor respectively above or under 15.5—25.1 km,and that water can come into the deep lithosphere in the structure water of mineral,and that in the subduction zones the average water contents is 0.5 %—1 0% in the area between the critical temperature of water and the limit temperature of the mineral dehydration.Also,discussed is the relation between the mineral dehydration and the genesis of ultrahigh pressure metamorphic rocks and low velocity zones in the lithosphere.
出处
《地质科技情报》
CAS
CSCD
北大核心
2000年第4期25-30,共6页
Geological Science and Technology Information
基金
教育部博士点基金资助项目!(1998)
国家自然科学基金资助项目!(498730 0 9)
