东海内陆架泥质沉积Rb和Sr的地球化学及其古气候意义  

Geochemical Studies on Rb and Sr in the Mud on the Inner Shelf of the East China Sea and Their Palaeoclimate Significance

作　　者：王顺华[1] 张国栋[2] 张纪双[3] 吴亚良[2] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640 [2]三峡大学湖北省水电工程施工与管理重点实验室,湖北宜昌443002 [3]胜利石油管理局,山东东营257000

出　　处：《科技导报》2007年第3期22-27,共6页Science & Technology Review

摘　　要：通过对位于东海内陆架闽浙沿岸泥质沉积区北部的DD2孔进行AMS14C年龄测试和Rb,Sr含量测定,获得了近2ka的Rb/Sr比值(RRb/Sr)变化的高分辨率曲线。该曲线揭示出10次RRb/Sr低值时期,它们与历史时期中国温度下降有很好的对应关系,并印证了约990AD的降温事件。根据RRb/Sr的变化,基本认同竺可桢所界定的隋唐温暖期,并认为气候存在温暖-寒冷-温暖的波动,且其中的相对寒冷期为800-890AD。研究认为小冰期时间段为1480-1890AD,且由3个寒冷阶段构成,小冰期的最冷峰为约1520AD,1670AD,1780AD和1850AD。A high-resolution palaeoclimate record of recent 2 ka is obtained based on RPb/Sr and AMS ^14C dating of Core DD2, which is located at the north of the mud area on the inner shelf of the East China Sea （ECS）. 10 periods of low RPb/Sr are identified, which well agree with periods of lower temperature in China＇s history, and the lower temperature during about 990 AD is verified. According to the variation of RPb/Sr the Sui-Tang dynasty Warming Period defined by Zhu Kezhen is confirmed on the whole, during which period a fluctuation of warm-cold-warm exists, and the cold period is during 800-890 AD. The Little Ice Age （LIA） extends from 1480 AD to 1890 AD, where 1520 AD, 1670 AD, 1780 AD and 1850 AD are cold.

关 键 词：东海内陆架 RB/SR 古气候 

分 类 号：P736.22[天文地球—海洋地质] P532[天文地球—海洋科学]