Tian Jun; Wang Pinxian; Cheng Xinrong; Li Qianyu (2005): Astronomically tuned time scale (12 Ma to 18.3 Ma) for ODP Site 1148, northern South China Sea. China University of Geoscience, Wuhan, China, Earth Science. Journal of China University of Geoscience, 30 (5), 513-518, georefid:2009-041316
Abstract:
Lithological cyclicity was observed in magnetic susceptibility records of the deep sea sediments from ODP Site 1184 in the northern South China Sea (SCS), and is considered to be related to obliquity cycles in the Miocene and Oligocene. Using recent methodology, an astronomically tuned time scale for the middle Miocene of ODP Site 1148 in the northern SCS was established. After tuning, the magnetic susceptibility (MS) records show strong obliquity and precession cycles as well as prominent eccentricity cycles. The planktonic foraminiferal events identified within the studied interval of ODP Site 1148 show ages very close to those set by Shackleton et al. (1999) for ODP Leg 154, which were obtained by the same astronomical tuning method used in this study, but differ substantially from the traditional age. The results lend support to the practicality of this method for establishing a tuned Miocene time scale.
Coverage:
West: 116.3356 East: 116.3356 North: 18.5010 South: 18.5010
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