晚更新世末期地磁短期游移的研究

STUDY OF THE SHORT MAGNETIC EXCURSION IN THE LATEST PLEISTOCENE

本文根据对胶州湾至丁字湾岸段的6个柱状岩芯古地磁标本系统测量结果,结合地层、古生物、古气候及^(14)C年代测定,确定了该区晚更新世末期哥德堡短期游移的存在。

The short magnetic excursion at Jiaozhou-Dingzi bays in the Latest Pleistocene was ascertained by the paleomagnetic measurements of six sedimentary cores, with reference to 14C dating, the palaeoclimate, palaeontological and the lithologicae character of the Quaternary strata. Comprehensive study shows that this excursion corresponded to the Gothenburg magnetic excursion (13750-12350 a B. P) occurred beneath the Holocene marine strata and on the top of the continental strata of the late Pleistocene. The Gothenburg magnetic excursion may be further proved as a boundary basis between the Pleistocene and the Holocene.