Hydrogen diffusion in clinopyroxene: dehydration experiments

作     者：夏群科 陈道公 S.Carpenter 支霞臣 王汝成 程昊 

作者机构：Department of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China Department of Geosciences The Pennsylvania State University PA 16082 USA State Key Laboratory of Mineral Deposits Nanjing University Nanjing 210093 China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2000年第43卷第6期

页      面：561-568页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：the National Natural Science Foundation of China(49773181 49803002) 

主　　题：clinopyroxene hydrogen diffusion dehydration. 

摘      要：Hydrogen diffusivity of one clinopyroxene megacryst from Nüshan, eastern China parallel to [001]* crystallographic direction was measured by high-temperature sequential dehydration experiments at 950üC and 850üC, which was (6.5ü1.5)×10-12(m2/s) and (1.8×0.7)×10-12(m2/s) respectively. From these results and the previous published data, it seems that the correlation between hydrogen diffusivity and Fe content suggested by Dyar et al. (1996) possibly does not exist. Clinopyroxene megacrysts from alkali basalts appear to be possible reliable samples for the study of the water evolution and hydrogen isotope compositions of the upper mantle.