Zr-in-Rutile Thermometry in HP/UHT Granulite in Bashiwake Area of the South Altun and Its Geological Implications
详细信息
- 责任者：Yu Shengyao (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhang Jianxin
- 刊名：Earth Science Frontiers
- 出版年：2011
- 卷期：18(2)
- 关键词：麻粒岩相 ; granulite facies ; 金红石 ; rutile ; 地质温度计 ; geologic thermometry ; 阿尔金断裂带 ; Altun Fracture Zone
- 页码：p.140-150
- 图表：7 illus., 3 tables, 35 refs.
- 分类号：0802
- 出版序号：20120194
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The trace element content in rutile was analyzed by both electron microprobe (EMP) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) for HP granulite in the Bashiwake area of South Altun HP-UHP metamorphic belt. The results indicate that Zr content in rutile from HP granulite measured by EMP coincides with the measured by LA-ICP-MS within experimental error. Zr-in-rutile thermometry of Thomkins et al. The results further show that HP granulites in the Bashiwake area of South Altun HP-UHP metamorphic belt experienced peak conditions at ultrahigh temperature and high pressure, followed by medium temperature granulite facies conditions related to retrogression.