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- W2353733265 abstract "Many kinds of eclogites (e.g., rutile eclogite, quartz eclogite, ilmenite eclogite, phengite eclogite and hornblendite) can be recognized in the main drillhole of Chinese Continental Scientific Drilling Project. Trace elements such as Nb, Cr and Zr in rutile are measured by electron microprobe with specific operating conditions. Provenance of all kinds of eclogites came from mafic rocks according to their Nb and Cr contents. All kinds of eclogites are characterized by low Nb concentrations. The Nb and Cr content of rutile is about identical from rutile eclogite, quartz eclogite, ilmenite eclogite, and hornblendite. Kyanite phengite eclogite has the highest Nb and Cr contents and its average Nb and Cr concentration is 720×10~ -6 and 712×10~ -6 , respectively. Compared to other eclogite, Kyanite phengite eclogite is more enriched in Cr. Based on a new Zr-in-rutile geothermometer by Zack et al. (2004), Rutile formation temperature of rutile eclogite varies from 608 to 746℃. Rutile formation temperature of quartz eclogite is between 629 and 680℃. Rutile formation temperature of ilmenite eclogite varies from 629 to 704℃.Rutile formation temperature of kyanite phengite eclogite is about 600℃ and Rutile formation temperature of hornblendite is about 629℃. When eclogite suffered amphibolite-facies retrograde metamorphism, Strong fluid activity resulted in Zr diffussional loss. So Zr content of rutiles became lower because of Zr diffusional resetting during amphibolite-facies retrograde metamorphism." @default.
- W2353733265 created "2016-06-24" @default.
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- W2353733265 date "2006-01-01" @default.
- W2353733265 modified "2023-09-24" @default.
- W2353733265 title "Trace Element Geochemistry of Rutiles in the Eclogites From the Chinese Continental Scientific Drilling Project Main Hole" @default.
- W2353733265 hasPublicationYear "2006" @default.
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