Age estimation of the mid-Pleistocene microtektite event in the South China Sea: A case showing the complexity of the sea-land correlation |
| |
Authors: | Jiliang Wang Quanhong Zhao Xinrong Cheng Rujian Wang Pinxian Wang |
| |
Institution: | (1) Laboratory of Marine Geology, MOE, Tongji University, 200092 Shanghai, China |
| |
Abstract: | The present study confirms the stratigraphical position of microtektite layer being clearly located below the Brunhes/Matuyama
(BIM) boundary. Based on the sedimentation rate derived from the stable isotopic and magnetic data of ODP Site 772A, cores
17957 and 17959 in the South China Sea, the age of the mid-Pleistocene impact event was estimated at 1–12 ka earlier than
the Brunhes-Matuyama polarity reversal. However, the microtektites were found above the measured BIM boundary in the loess
profile due to the downward deviation of the measured B/M boundary from its true position1]. This demonstrates the complexity of paleo-magnetic records in the loess profiles which, in turn, causes the confusion in
the sea-land stratigraphic correlation. |
| |
Keywords: | microtektites Brunhes/Matuysma (BN) boundary mid-Pleistocene sea-land correlation |
本文献已被 万方数据 SpringerLink 等数据库收录! |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |