Studying on the Carboniferous Sequence Stratigraphy of the Seamount Carbonate Platform in Paleo- Tethys, Southwestern Yunnan, China

Zhang Haiqing; Lin Benpei; Fang Nianqiao

Based on the outcrop sequence- stratigraphic principle and method, the authors first studied theCarboniferous section of the seamount carbonate platform in Paleo- Tethys(the Changning- Menglianbelt), Southwestern Yunnan, China.6 third- order sequences were examined in detail with particular at-tention to the key surface of the parasequence.There are l sequence in Early Namurian, 3 sequences bothin Late Namurian- Westphalian(Weining) and Stephanian- Sakmarian(Yutangzhai F., the upper mostsequence belongs to Permian).Third- order sequences and eustatic transgressive- regressive cycles atthe Yutangzhai (in Southwestern Yunnan) can be correlated with ones in Southern Guizhou excentparasequences.Carbon and oxygen isotopes at the Yutangzhai were lighter than those in SouthernGuizhou, Probably, the same eustasy and different tectonic background were the main causes of theabove facts during the Late Carboniferous.

China University of Geosciences,Beijing,100083

Received Date: 1996-06-12

Publish Date: 1997-12-10

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Abstract: Based on the outcrop sequence- stratigraphic principle and method, the authors first studied theCarboniferous section of the seamount carbonate platform in Paleo- Tethys(the Changning- Menglianbelt), Southwestern Yunnan, China.6 third- order sequences were examined in detail with particular at-tention to the key surface of the parasequence.There are l sequence in Early Namurian, 3 sequences bothin Late Namurian- Westphalian(Weining) and Stephanian- Sakmarian(Yutangzhai F., the upper mostsequence belongs to Permian).Third- order sequences and eustatic transgressive- regressive cycles atthe Yutangzhai (in Southwestern Yunnan) can be correlated with ones in Southern Guizhou excentparasequences.Carbon and oxygen isotopes at the Yutangzhai were lighter than those in SouthernGuizhou, Probably, the same eustasy and different tectonic background were the main causes of theabove facts during the Late Carboniferous.

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Studying on the Carboniferous Sequence Stratigraphy of the Seamount Carbonate Platform in Paleo- Tethys, Southwestern Yunnan, China

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