Zr-in-rutile thermometry in HP/UHP eclogites from Western China

Zhang, Guibin, Ellis, David J., Christy, Andrew G., Zhang, Lifei and Song, Shuguang (2010) Zr-in-rutile thermometry in HP/UHP eclogites from Western China. Contributions to Mineralogy and Petrology, 160 3: 427-439. doi:10.1007/s00410-009-0486-2


Author Zhang, Guibin
Ellis, David J.
Christy, Andrew G.
Zhang, Lifei
Song, Shuguang
Title Zr-in-rutile thermometry in HP/UHP eclogites from Western China
Journal name Contributions to Mineralogy and Petrology   Check publisher's open access policy
ISSN 0010-7999
1432-0967
Publication date 2010-09-01
Year available 2010
Sub-type Article (original research)
DOI 10.1007/s00410-009-0486-2
Open Access Status Not yet assessed
Volume 160
Issue 3
Start page 427
End page 439
Total pages 13
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Formatted abstract
Four Zr-in-rutile thermometry calibrations are applied to eclogites from Western China. Here, we show that if rutile grows in equilibrium with Qtz and Zrn, and is isolated inside garnet, it preserves its Zr composition and does not undergo compositional change due to cation exchange with the host garnet. It thus preserves the composition for the P-T conditions of its formation and the growth zoning of the host garnet. For the HP/UHP metamorphic temperature, the Tomkins et al. (J Metamorph Geol 25:703-713, 2007) calibration yields temperatures that agree well with previous studies, whereas the other three calibrations (Zack et al. in Contrib Mineral Petrol 148:471-488, 2004; Watson et al. in Contrib Mineral Petrol 151:413-433, 2006; Ferry and Watson in Contrib Mineral Petrol in 154:429-437, 2007), which do not include a pressure correction, give systematically lower temperatures. Zr contents of rutile inclusions within garnet show systematic decrease from garnet core to rim. The rutile inclusions in garnet rims contain the lowest Zr content, similar to that in the matrix. Analyses confirm that the pressure plays a significant role in modifying the primary temperature dependence of the Zr content of rutile. Rutiles trapped in garnets are unable to re-equilibrate easily during retrogression, but those in the matrix can do so, providing retrograde P-T path information.
Keyword Eclogite
Rutile
Thermometry
Western China
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 40821002
200801028
2009CB825007
DP0559055
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Earth and Environmental Sciences
 
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