南海ODP1148站中中新世(12~18.3Ma)天文调谐的年代标尺

田军; 汪品先; 成鑫荣; 李前裕

Volume 30 Issue 5

Sep. 2005

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Article Navigation > Earth Science > 2005 > 30(5): 513-518

TIAN Jun, WANG Pin-xian, CHENG Xin-rong, LI Qian-yu, 2005. Astronomically Tuned Time Scale 12 Ma to 18.3 Ma, ODP Site 1148, Northern South China Sea. Earth Science, 30(5): 513-518.

Citation:

TIAN Jun, WANG Pin-xian, CHENG Xin-rong, LI Qian-yu, 2005. Astronomically Tuned Time Scale 12 Ma to 18.3 Ma, ODP Site 1148, Northern South China Sea. Earth Science, 30(5): 513-518.

TIAN Jun, WANG Pin-xian, CHENG Xin-rong, LI Qian-yu, 2005. Astronomically Tuned Time Scale 12 Ma to 18.3 Ma, ODP Site 1148, Northern South China Sea. Earth Science, 30(5): 513-518.

Citation:

TIAN Jun, WANG Pin-xian, CHENG Xin-rong, LI Qian-yu, 2005. Astronomically Tuned Time Scale 12 Ma to 18.3 Ma, ODP Site 1148, Northern South China Sea. Earth Science, 30(5): 513-518.

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Astronomically Tuned Time Scale 12 Ma to 18.3 Ma, ODP Site 1148, Northern South China Sea

State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

Received Date: 2005-05-17
Publish Date: 2005-09-25

Abstract

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), which was 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 as this study, but differ substantially from the traditional age. The results lend support to the practicality of the method for establishing a tuned Miocene time scale.
- South China Sea,
- ODP site 1148,
- Middle Miocene,
- magnetic susceptibility,
- astronomical timescale

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References(24)

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