Age estimation of the mid-Pleistocene microtektite event in the South China Sea; a case showing the complexity of the sea-land correlation

Author(s): Wang Jiliang; Zhao Quanhong; Cheng Xinrong; Wang Rujian; Wang Pinxian
Author Affiliation(s): Primary:
Tongji University, Laboratory of Marine Geology, Shanghai, China
Volume Title: Chinese Science Bulletin
Source: Chinese Science Bulletin, 45(24), p.2277-2280. Publisher: Science Press, Beijing, China. ISSN: 1001-6538
Note: In English. 17 refs.; illus.
Summary: The present study confirms the stratigraphical position of microtektite layer being clearly located below the Brunhes/Matuyama (B/M) 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 10-12 ka earlier than the Brunhes-Matuyama polarity reversal. However, the microtektites were found above the measured B/M boundary in the loess profile due to the downward deviation of the measured B/M boundary from its true position. This demonstrates the complexity of paleo-magnetic records in the loess profiles which, in turn, causes the confusion in the sea-land stratigraphic correlation.
Year of Publication: 2000
Research Program: ODP Ocean Drilling Program
Key Words: 03 Geochronology; 24 Surficial Geology, Quaternary Geology; Brunhes Chron; Case studies; Cenozoic; Cores; Geochronology; Leg 124E; Magnetization; Matuyama Chron; Microtektites; Middle Pleistocene; Natural remanent magnetization; North Pacific; Northwest Pacific; ODP Site 772; Ocean Drilling Program; Pacific Ocean; Paleomagnetism; Pleistocene; Quaternary; Remanent magnetization; South China Sea; Tektites; Upper Cenozoic; Upper Quaternary; West Pacific
Coordinates: N163900 N163900 E1194200 E1194200
Record ID: 2001058018
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