Experimental calibration of sapphirine-spinel Fe2+-Mg exchange thermometer: Implication for constraints on P-T condition of Howard Hills, Napier Complex, East Antarctica

Kei Sato, Tomoharu Miyamoto, Toshisuke Kawasaki

研究成果: Contribution to journalArticle

25 被引用数 (Scopus)

抄録

The Fe2+-Mg distribution coefficients between sapphirine and spinel:{A formula is presented}were experimentally determined at pressures of 9-13 kbar and temperatures of 950-1150 °C using a natural ultrahigh-temperature (UHT) granulite with paragenesis of these minerals from the Napier Complex in East Antarctica [XMg = Mg / (Fe + Mg); XFe = Fe / (Fe + Mg)]. A new sapphirine-spinel geothermometer has been obtained as:{A formula is presented}. We applied the exchange thermometer to UHT or high-grade metamorphic rocks that were reported from various complexes in the world. If the KD values of 2.63-4.34 obtained from low-Cr mineral pairs such as XCrSpr < 0.016 and XCrSpl < 0.047 were substituted into the equation, their temperature conditions would be estimated as 806-1050 °C at 11 kbar. The XCr means Cr / (Al + Cr(+ Fe3+)). These temperatures are reasonable retrograde or near peak metamorphic condition.

本文言語英語
ページ(範囲)398-408
ページ数11
ジャーナルGondwana Research
9
4
DOI
出版ステータス出版済み - 6 1 2006

All Science Journal Classification (ASJC) codes

  • Geology

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