极地研究Issue(1)：46-57,12.DOI:10.13679/j.jdyj.2014.1.046
西北冰洋楚科奇海台08 P23孔氧同位素3期以来的古海洋与古气候记录
PALEOCEANOGRAPHIC AND PALEOCLIMATIC RECORDS OF CORE 08P23 FROM THE CHUKCHI PLATEAU, WESTERN ARCTIC OCEAN,SINCE MIS 3
摘要
Abstract
Multi-proxy investigations have been performed on core 08P23,which was collected from the Chukchi Plateau, western Arctic Ocean,during the third Chinese National Arctic Research Expedition.The core was dated to Marine Isotope Stage(MIS)3 by a combination of AMS 14 C dating and regional core correlation.A total of 5 prominent ice-rafted detritus(IRD)events were recognized in MIS 2 and MIS 3 .The IRD events in MIS 3 originated from the vast carbonate rock outcrops of the Canadian Arctic Archipelago and the clastic quartz in MIS 2 may have had a Eura-sian origin.Most -δ18 O and -δ13 C values of Neogloboquadrina pachyderma(sinistral)(Nps)in core 08P23 are lighter than the average values of the surface sediments.The light Nps-δ18 O and -δ13 C values in the two brown layers in MIS 1 and MIS 3 resulted from meltwater events,and those in the gray layers in MIS 3 were caused by enhanced sea ice formation.The Nps-δ18 O values vary inversely with those of Nps-δ13 C in MIS 2,indicating that the study area was covered by thick sea ice or an ice sheet with cold temperatures and little meltwater,which prevented bioproductivity and sea-atmosphere exchange,as well as water mass ventilation.The covarying light values of Nps-δ18 O and -δ13 C in MIS 1 and MIS 3 resulted from meltwater and/or brine rejection.关键词
西北冰洋/楚科奇海台/氧同位素3期/冰筏碎屑事件/氧碳同位素/水团变化Key words
Chukchi Plateau/western Arctic Ocean/MIS 3/IRD events/oxygen and carbon isotopes/water mass changes引用本文复制引用
章陶亮,王汝建,陈志华,陈建芳,程振波,孙烨忱..西北冰洋楚科奇海台08 P23孔氧同位素3期以来的古海洋与古气候记录[J].极地研究,2014,(1):46-57,12.基金项目
国家自然科学基金重点项目（41030859）、国家自然科学基金中俄合作与交流项目（41211120173）、南北极环境综合考察与评估专项（CHINARE2013-03-02，CHINARE2013-04-01）、国家海洋局极地考察办公室对外合作支持项目（IC201105）和中国地质调查局地质调查工作项目（水［2013］02-013-012）资助 （）
