AN ALTERNATIVE ASTRONOMICAL CALIBRATION OF THE LOWER PLEISTOCENE TIMESCALE BASED ON ODP SITE 677

被引：1172

作者：

SHACKLETON, NJ

BERGER, A

PELTIER, WR

机构：

[1] Subdepartment of Quaternary Research, The Godwin Laboratory, Free School Lane

[2] Institut d'Astronomie et de Géophysique G. Lemaitre, Université Catholique de Louvain, Louvain-la-Neuve

[3] Department of Physics, University of Tornoto

来源：

TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH-EARTH SCIENCES | 1990年 / 81卷

关键词：

PLEISTOCENE TIMESCALE; MILANKOVITCH; ASTRONOMICAL CHRONOLOGY; OXYGEN ISOTOPES; SPECMAP; MAGNETOSTRATIGRAPHY;

D O I：

10.1017/S0263593300020782

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Ocean Drilling Program (ODP) Site 677 provided excellent material for high resolution stable isotope analysis of both benthonic and planktonic foraminifera through the entire Pleistocene and upper Pliocene. The oxygen isotope record is readily correlated with the SPECMAP stack (Imbrie et al. 1984) and with the record from DSDP 607 (Ruddiman et al. 1986) but a significantly better match with orbital models is obtained by departing from the timescale proposed by these authors below Stage 16 (620 000 years). It is the stronger contribution from the precession signal in the record from ODP Site 677 that provides the basis for the revised timescale. Our proposed modification to the timescale would imply that the currently adopted radiometric dates for the Matuyama-Brunhes boundary, the Jaramillo and Olduvai Subchrons and the Gauss-Matuyama boundary underestimate their true astronomical ages by between 5 and 7%.

引用

页码：251 / 261

页数：11

共 45 条

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