Carbon isotopes in eclogite and apatite separate from Huangzhen and Shima in SE Dabie
Carbon isotopes in eclogite and apatite separate from Huangzhen and Shima in SE Dabie
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DOI：
10.1007/bf02875306
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Yiliang Li;Yong‐Fei Zheng;B. Gong;B. Fu
中科院分区：
文献类型：
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作者：
Yiliang Li;Yong‐Fei Zheng;B. Gong;B. Fu
The carbon isotope compositions of high- and ultrahigh-pressure eclogite and apatite separate from Huangzhen and Shima in SE Dabie Mountains were analyzed by EA-MS online technique. The δ13C values of the eclogites cover a wide range of -30.7% ∓ 1.5%, whereas those of apatites only have a small range of -28.1 %—21.0‰ Some of the eclogites with the high δ13C values suffered retrogressive alteration by CO2-bearing fluids. The low δ13C values of the apatites indicate that the eclogites contain surficial carbon of organic origin. It is concluded that protoliths of the eclogites were exposed to the surface of the Earth, and that the carbon-bearing fluid was depleted in13C during the eclogite-facies metamorphism.
