Temporal Variation of Water Content in the Lower Continental Crust： Evidence from Feldspar in Mafic Granulites
详细信息
- 责任者：Yang Guicai (Key Laboratory of Crest-Mantle Materials and Environments ; CAS ; School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China) ; Yang Xiaozhi
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2012
- 卷期：31(4)
- 关键词：麻粒岩 ; granulite ; 下地壳 ; lower crust ; 含水率 ; moisture content
- 页码：p.565-577
- 图表：6 illus., 4 tables, 59 refs.
- 分类号：0802
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
Water contents and chemical compositions of normal anhydrous minerals from Early-Paleozoic Songshugou and Tongbai terrain granulites and Paleo-Proterozoic Junan granulite xenoliths were obtained by Fourier transform infrared spectrometer（FTIR） and electron microprobe（EMP） respectively. All granulites characterized by mafic nature were formed under the lowest crustal conditions. Combined with previous results for Paleo-Proterozoic granulites （Junan and Nushan xenoliths and Hannuoba terrain） and Mesozoic granulites （Daoxia and Hannuoba xenoliths）, it seems that water contents in the lower continental crust of eastern China were variable with time.