| 晚泥盆世弗拉斯期—法门期之交海水温度变化的同位素证据 |
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| 关键词:Late Devonian Fransnian Famennian stage stable isotope composition paleotemperature |
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| Isotopic Evidence for the Temperature Change of the Paleo-Ocean between Late Devonian Fransnian Period and Famennian Period in South China |
| The shallow platform sedimentary facies is well developed along the Laojiangchong section in Xikuangshan mine, Lengshuijiang area, Hunan Province, which includes the well known Upper Devonian Fransian Famennian(Fr/Fa) boundary. Long period of field studies and researches led the authors to reveal the palaeotnology as well as sedimentary association sand characteristics. The shell sofbrachiopod Cyrospirifer vernemili were analysed isotopically and by SEM in this study. The carbon and oxygen isotopic analyses ( δ 18 O:-8.4‰～-9.6‰; δ 13 C: -2.2‰～0.5‰) show an abnormal shift around the boundary of Fr/Fa in South China, which can serve as a standard of regional stratigraphic correlation. Depending on the calculation of oxygen isotopes within the well preserved brachiopods, the authors drew the inference about temperature decreasing from late Fransian to early Famennian. |
| WANG Da-rui,MA Xue-ping,DONG Ai-zheng,ZHU De-sheng.2001.Isotopic Evidence for the Temperature Change of the Paleo-Ocean between Late Devonian Fransnian Period and Famennian Period in South China[J].Acta Geoscientica Sinica,22(2):141-144. |
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