| 中国陆相上中新统灞河阶底界层型的选择 |
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| 关键词:Bahean boundary stratotype Late Miocene biostratigraphic unit paleomagnetic age China |
| 基金项目:全国地层委员会项目(编号: 1212011120142); 国家自然科学基金重点项目(编号: 41430102); 国家重点基础研究发展计划项目(编号: 2012CB821906) |
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| Selection of the Lower Boundary Stratotype of the Terrestrial Upper Miocene Bahean Stage in China |
| In 2014, the National Commission on Stratigraphy of China formally suggested dividing the Chinese Upper Mio-cene Series into the Bahean Stage and Baodean Stage in the newly published “Chinese Stratigraphical Chart”. The name “Bahe” is derived from the lithostratigraphic unit Bahe Formation, and its typical section is located at Shuijiazui on the left bank of the Bahe River in Lantian County, Shaanxi Province. The Bahean Stage is correlated to the marine Tortonian Stage in the International Stratigraphical Chart, and they share the same definition of the lower boundary at the bottom of the paleomagnetic Chron C5r.2n, with an age of 11.6 Ma. At the Shuijiazui section in the Lantian area, this boundary is missing. Among the early Late Miocene mammalian faunas in China, the Guonigou and Dashengou faunas from the Linxia Basin in Gansu, the Tuosu and Shengou faunas from the Qaidam Basin in Qinghai, the Amuwusu fauna from Sonid Right Banner, Inner Mongolia, the Bulong fauna from the Biru Basin in Tibet, the Lamagou fauna from Fugu, Shaanxi, and the Xiaohe fauna from the Yuanmou Basin in Yunnan are correlated to the Bahean Age. The Guonigou section in Dongxiang, Gansu is the most advantageous candidate stratotype of the lower boundary of the Bahean Stage. |
| DENG Tao,HOU Su-kuan,SHI Qin-qin.2015.Selection of the Lower Boundary Stratotype of the Terrestrial Upper Miocene Bahean Stage in China[J].Acta Geoscientica Sinica,36(5):523-532. |
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