详细信息   

• 责任者：Shi Yonghong (College of Resource and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China） ; Song Chuanzhong
• 刊名：Acta Mineralogica Sinica
• 出版年：2008
• 卷期：28(4)
• 关键词：绿辉石 ; omphacite ; 铁 ; iron ; 榴辉岩 ; eclogite
• 页码：p.367-380
• 图表：5 illus., 2 tables, 62 refs.
• 分类号：0802
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

摘要

In this paper, four kinds of Fe²⁺ adjustments for omphacite have been compared on the basis of the peak p-t estimates and petrologic investigations of different eclogites across the Taihu and Tongcheng areas from the South Dabie Terrane. The influence of Fe²⁺ adjustment in omphacite on the p-t conditions has been discussed by comparison, and the charge balance method has been recommended as the ideal one for Fe²⁺ adjustment in omphacite. Meanwhile, the end-member Fe²⁺ and Fe²⁺/Fe³⁺=1∶1 adjustment methods for omphacites should be used for cross test. Furthermore, the eclogites across the Tongcheng area have been identified as the low temperature and high pressure (LT/HP) eclogites on the basis of the peak p-t conditions, in which Fe²⁺ in omphacite has been adjusted by the charge balance, and the LT/HP eclogites perhaps are of oceanic origin.