Zr-in-Rutile Thermometry in HP/UHT Granulite in Bashiwake Area of the South Altun and Its Geological Implications
详细信息   
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.
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