南海北部盛冰期以来古海洋环境变化的沉积记录

张海生; 周怀阳; 卢冰; 陈荣华; 张富元

南海北部盛冰期以来古海洋环境变化的沉积记录

1.
国家海洋局海底科学重点实验室, 浙江, 杭州, 310012;国家海洋局, 第二海洋研究所, 浙江, 杭州, 310012
2.
中国科学院, 广州地球化学研究所, 广东, 广州, 510640

基金项目: 国家重点基础研究专项经费资助项目(G2000078500)

计量
- 文章访问数: 821
- HTML全文浏览量: 21
- PDF下载量: 1148
- 被引次数: 0
出版历程
- 收稿日期: 2003-08-10
- 修回日期: 2004-02-16

Environmental change of palaeo-oceanography recorded in the sediment stratum in the noruhern part of South China Sea since the post glacial period

1.
Key Laboratory of Submarine Geoscience of State Oceanic Adminstration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

摘要

摘要: 利用气候替代指标U₃₇^k-SST,浮游有孔虫Globigerinoides ruber的δ¹⁸O,δ¹³C,微体古生物种群变化、陆源和生源组分以及沉积物粒径等,对南海北部69孔沉积物进行综合研究.结果表明U₃₇^k-SST在冰后期为23.3～26.9℃,在末次盛冰期时为22.2～23.8℃.用浮游有孔虫转换函数法对季节温差进行估算,在冰后期为4.5～7.0℃,在末次冰期为7.0～9.0℃,两种估温法均反映了古气候变化相应的海水表层温度.69柱沉积物地层记录在末次盛冰期浮游有孔虫温带优势种Neogloboguadrina pachyderma和营养种Neogloboguadrina dutertrei丰度一致增加;热带优势种Pulleniatina obliqueloculata和Globigerinoide sacculifer以及超微化石丰度则相应减少,而冰后期则相反.浮游有孔虫、钙质超微化石组成和数量的改变也为古海洋温度升、降提供了直接的证据.研究还表明南海北部冰后期以河流搬运为主,末次盛冰期时以风力搬运占优势,这反映了冬季风强化.
- 南海 /
- U₃₇^k-SST /
- 转换函数 /
- 古海洋环境
Abstract: Comprehensive study is carried out for 69 sediment samples by using the climatic index,U₃₇^k-SST,δ¹⁸O,δ¹³C,species composition of fossil micro-organisms as well as sediment type.The result shows that U₃₇^k-SST is 23.3~26.9℃ during the post glacial period and 22.2~23.8℃ during the last glacial period.Conversion function of planktonic foraminifer shows that seasonal temperature difference is 4.5~7.0℃ in the post glacial period and 7.0~9.0℃ in the last glacial period.This reflects the change of sea surface temperature as function of palaeo-climate change.The increase of Neogloboguadrina pachyderma density,a cold water dominant species coincides with that of Neogloboquadrina dutertrei whereas the abundance of tropical dominant species such as Pulleniatina obliqueloculata and Glohigerinoi desacculifer decreases during the last glacial period; the opposite trend is noticed during the post glacial period.The direct evidence of temperature alternation is provided by the assemblages and density variation of planktonic foraminifer,calcium micro-fossil in the palaeo-ocean.The resear chalso suggests that the northern part of South China Sea is mainly influenced by fluvial transport during the post glacial period and by wind during the last glacial period,reflecting the intensification of wind during winter season.
- South China Sea /
- U₃₇^k-SST /
- palaeo-oceano graphy /

HTML全文

参考文献(23)

丁一汇,李崇银.南海季风爆发和演变及其与海洋的相互作用[M].北京:气象出版社,1999.423.

WANG P X,WANG L J,BIAN Y,et al.Late Quaternary paleoceanography of the South China Sea:surface circulation and carbonate cycles[J].Marine Geology,1995,127(1-4):145-165.

汪品先.穿越圈层,横跨时空——记"地球系统过程"国际大会[J].地球科学进展,2002,17(3):311-313.

BRASSELL S C,EGLINTON G,MARLOWE I T,et al.Molecular stratigraphy:a new tool for climatic assessment[J].Nature,1986,320(13):129-133.

PRAHL F G,MUCLHANSEN L A,ZAHNILE D L.Further evaluation of long-chain alkenones as indicators of palcoeanographic conditions[J].Geochim Cosochim Acta,1988,52(9):2 303-2 310.

SIIKES E L,KEIGWIN L.Equatorial Atlantic sea surface temperature for the last 30 kyr:a comparison of U₃₇^kδ 18O and foraminiferal assemblage temperature estimates[J].Palcoceanography,1994,9(1):31-45.

汪品先,闵秋宝,卞云华,等.十三年来南海北部陆坡的浮游有孔虫及古海洋意义[J].地质学报,1986,60(3):215-225.

赵泉鸿,翦知湯,王吉良,等.南海北部晚新生代氧同位素地层学[J].中国科学,2001,31(10):800-807.

郑连福,WINN K,STORFFERS P.南海北部晚第四纪浮游有孔虫的分布及其古海洋意义[A].南海海洋沉积作用过程与地球化学研究[M].北京:海洋出版社,1993.46-60.

刘传联,徐金鲤.生油古湖泊生产力的估算方法及应用实例[J].沉积学报,2002,20(1):144-150.

BURKE S K,BERGER W H,COULBOURN W T,et al.Benthic foraminifera in box core ERDC 112,Ontong Java Plateau[J].Foraminiferal Res,1993,23(1):19-39.

程鹏,高抒.北黄海西部海底沉积物的粒度特征和净输运趋势[J].海洋与湖沼,2000,31(6):604-615.

黄维,汪品先.末次冰期以来南海深水区的沉积速率[J].中国科学,1998,20(1):13-17.

MARTINSON D G,PISIAS N G,HAY J D.,et al.Age dating and the orbiatal theory of the ice ages:development of a high-resolution 0 to 3 000 000 year ehronostratigraphy[J].Quat Res,1987,27(1):1-29.

PELEJERO C,GRIMALT J O.The correlation between the U₃₇^k index and sea surface temperatures in the warm boundary:the South China Sea[J].Geochim Cosmochim Acta,1997,61(22):4 789-4 797.

MULLER P J,KIRST G,RUHLAND G,et al.Calibration of the alkenone paleotemperature index U₃₇^k based on core-tops from the eastern South Atlantic and the global ocean(60°N～60°S)[J].Geochim Cosmochim Acta.1998,62(10):1 757-1 772.

WANG L J,WANG P X.Late Quaternary paleoceanography of the South China Sea:glacial-interglacial contrasts in an enclosed basin[J].Paleoceanography.1995,5(1),77-90.

WIESNER M G,ZHENG L,WONG H K,et al.Fluxes of particulate matter in South China Sea[A].ITTEKKOT V,et al.Particle Flux in the Ocean[M].New York:John Wiley &Sons Ltd,1996.293-312.

PELEJERO C,GRIMALT J O.High-resolution U₃₇^k temperature reconstructions in the South China Sea over the past 220 kyr[J].Palcoceanography.1999,14(2):224-231.

汪品先.十五万年来的南海[M].上海:同济大学出版社,1995.46-77.

钱建兴,晚第四纪以来南海古海洋学研究(A)[M].北京:科学出版社,1999.121-175.

WANG L J,SAMTHEIN M,ERLENKEUSER H,et al.East Asian monsoon climate during the Late Pleistocene:high-resolution sediment records from the South China Sea[J].Marine Geology,1999,156(1-4):245-284.

赵泉鸿、汪品先.南海第四纪古海洋学研究进展[J].第四纪研究,1999,6(3):481-501.

施引文献

资源附件(0)

访问统计