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Carbonate clumped isotope thermometry is based on analyzing the tracer mass 47 of CO_2 generated from acid digestion of carbonate minerals. It uses temperature dependency of anomalous abundance of ^<1...3>C^<18>O^<16>O (Δ_<47>) relative to the stochastic distribution of this isotopologue, and is independent of isotopic composition of water that precipitates the carbonate minerals. Intensive researches during the last decade have developed significant improvement in methodology of the clumped isotopic measurements, however there are still some difficulties and complications in purifying organic-free CO_2 as well in establish the relational expression between Δ_<47> and temperature. Here we introduce the basic principles and the technical advancements, which can be applied for our equipment established in Kyushu University.続きを見る
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