江苏兴化DS浅孔沉积物地球化学元素与粒度所揭示的古环境意义
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摘要
选择位于东亚季风典型区的苏北盆地沉降中心附近湖沼沉积为研究对象,进行了AMS14C、粒度、地球化学元素的综合分析。分析表明,末次冰消期以来苏北盆地古气候经历了冷干、暖湿、温湿、冷暖波动剧烈、暖湿的变化过程。苏北盆地DS钻孔沉积物所揭示的气候变化与贵州董歌洞石笋氧同位素数据和格陵兰冰芯数据所揭示的气候变化总体变化趋势大体一致,但在一些细部上还是存在着差异,较好的响应了区域环境和全球气候变化。
A sediment core of the typical area of East Asian monsoon from North Jiangsu Basin was chosen for the study.Based on the analyses of geochemistry elements and grain size of DS core sediments from the basin,the paper probed into the characteristics and the environmental significance of geochemistry elements ratios and grain size.The results show that regional palaeoenvironmental changes were divided into five periods: cool and dry period of 13,700-11,310 cal a B P,and include Younger Dryas Event;warm and moist period of 11,310-9,100 cal a B P;temperate and moist period of 9,100-7,710 cal a BP;temperature and humidity fluctuated high frequency period of 7,710-6,480 cal a B P;warm and moist period of 6,480-0 cal a B P.The records of climatic and environmental evolution of DS core were in accordance with the GRIP oxygen isotope record and Donggedong's stalagmite oxygen isotope record approximately.It responded to regional environmental and global abrupt climatic changes.
A sediment core of the typical area of East Asian monsoon from North Jiangsu Basin was chosen for the study.Based on the analyses of geochemistry elements and grain size of DS core sediments from the basin,the paper probed into the characteristics and the environmental significance of geochemistry elements ratios and grain size.The results show that regional palaeoenvironmental changes were divided into five periods: cool and dry period of 13,700-11,310 cal a B P,and include Younger Dryas Event;warm and moist period of 11,310-9,100 cal a B P;temperate and moist period of 9,100-7,710 cal a BP;temperature and humidity fluctuated high frequency period of 7,710-6,480 cal a B P;warm and moist period of 6,480-0 cal a B P.The records of climatic and environmental evolution of DS core were in accordance with the GRIP oxygen isotope record and Donggedong's stalagmite oxygen isotope record approximately.It responded to regional environmental and global abrupt climatic changes.
引文
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[24]薛红喜,何江,樊庆云,等.黄河包头段常见离子对重金属在沉积物上吸附影响机制研究[J].地理科学,2008,28(3):407~411.
[25]王心源,吴立,张广胜,等.安徽巢湖全新世湖泊沉积物磁化率与粒度组合的变化特征及其环境意义[J].地理科学,2008,28(4):548~553.
[26]Yuan D X,Cheng H,Edwards R L,et al.Timing,duration andtransitions of the last Interglcial Asian Monsoon[J].Science,2004,304:575-579.
[27]Johnsen S J,Clausen H B,Dansgaard W,et al.Irregular glacialinterstadials recorded in a new Greenland ice core[J].Nature,1992,359:311-313.
[28]勾韵娴,唐领余,孙息春,等.江苏北部全新世海侵事件和气候变化[J].江苏地质,1999,23(4):241~245.
[29]姚檀栋,杨梅学,康建成.从古里雅冰芯与祁连山树轮记录看过去2000年气候变化[J].第四纪研究,2001,21(6):514~519.
[2]黄润,朱诚,王升堂.天堂寨泥炭地层的磁化率、Rb/Sr值及其反映的古气候意义[J].地理科学,2007,27(3):385~389.
[3]史威,朱诚,马春梅,等.中坝遗址约4 250 a B.P.以来古气候和人类活动记录[J].地理科学,2008,28(5):703~708.
[4]余素华,文启忠,张士三.中国西北地区晚第四纪黄土中镁铝地球化学与古气候意义[J].沉积学报,1994,12(1):112~116.
[5]朱江玲,刘鸿雁,王红亚.河北坝上地区湖泊沉积物记录的中全新世干旱气候[J].地理科学,2007,27(3):380~384.
[6]王国平,刘景双,翟正丽.沼泽沉积剖面特征元素比值及其环境意义———盐碱化指标及气候干湿变化[J].地理科学,2005,25(3):335~339.
[7]张虎才,李吉均,马玉贞,等.腾格里沙漠南缘武威黄土沉积元素地球化学特征[J].沉积学报,1997,15(4);152~158.
[8]郭正堂,魏兰英,吕厚远,等.晚第四纪风尘物质成分的变化及其环境意义[J].第四纪研究,1999,19(1):41~47.
[9]舒强,钟巍,熊黑钢,等.南疆尼雅地区4 000 a来的地化元素分布特征与古气候环境演化的初步研究[J].中国沙漠,2001,21(1):12~18.
[10]鹿化煜,安芷生.黄土高原黄土粒度组成的古气候意义[J].中国科学(D辑),1998,28(3):278~283.
[11]汪海斌,陈发虎,张家武.黄土高原西部地区黄土粒度的环境指示意义[J].中国沙漠,2002,22(1):21~26.
[12]赵强,王乃昂,程弘毅,等.青土湖沉积物粒度特征及其古环境意义[J].干旱区地理,2003,26(1):1~5.
[13]贾铁飞,戴雪荣,张卫国,等.全新世巢湖沉积记录及其环境变化意义[J].地理科学,2006,26(6):706~711.
[14]蒋庆丰,刘兴起,沈吉.乌伦古湖沉积物粒度特征及其古气候环境意义[J].沉积学报,2006,24(6):877~882.
[15]Stuiver M,Polach H A.Discussion:Reporting of14C data[J].Radiocarbon,1977,19(3):355-363.
[16]Stuiver M,Reimer P J.Extended 14C data base and revised 3.014C calibration program[J].Radiocarbon,1993,35(1):215-230.
[17]Reimer P,Baillie MG L,Bard E,et al.Intcal04 terrestrial radio-carbon age calibration,0-26 cal kyr BP[J].Radiocarbon,2004,46(3):1029-1058.
[18]王云,魏复盛.土壤环境元素化学[M].北京:中国环境科学出版社.1995:371~379.
[19]李中轩,朱诚,朱青,等.中坝遗址地层的Cr/Cu值对干湿环境的指示意义[J].地理科学,2008,28(6):799~803.
[20]陈克造,Bow l J M,K Kelts.四万年来青藏高原的气候变迁[J].第四纪研究,1990,11(1):22~31.
[21]Porter S C,An Zhi sheng.Correlation between climate event s inthe north Atlantic and China during the last glaciation[J].Na-ture,1995,375:305-308.
[22]陈敬安,万国江,张峰,等.不同时间尺度下的湖泊沉积物环境记录———以沉积物粒度为例[J].中国科学(D辑),2003,33(6):563~568.
[23]谢远云,李长安,王秋良,等.江汉平原9.0 ka B.P.以来的气候演化:来自江陵剖面沉积物记录[J].地理科学,2006,26(2):199~204.
[24]薛红喜,何江,樊庆云,等.黄河包头段常见离子对重金属在沉积物上吸附影响机制研究[J].地理科学,2008,28(3):407~411.
[25]王心源,吴立,张广胜,等.安徽巢湖全新世湖泊沉积物磁化率与粒度组合的变化特征及其环境意义[J].地理科学,2008,28(4):548~553.
[26]Yuan D X,Cheng H,Edwards R L,et al.Timing,duration andtransitions of the last Interglcial Asian Monsoon[J].Science,2004,304:575-579.
[27]Johnsen S J,Clausen H B,Dansgaard W,et al.Irregular glacialinterstadials recorded in a new Greenland ice core[J].Nature,1992,359:311-313.
[28]勾韵娴,唐领余,孙息春,等.江苏北部全新世海侵事件和气候变化[J].江苏地质,1999,23(4):241~245.
[29]姚檀栋,杨梅学,康建成.从古里雅冰芯与祁连山树轮记录看过去2000年气候变化[J].第四纪研究,2001,21(6):514~519.
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