SPORO-POLLEN RECORDS OF BOREHOLE DZS2 OFFSHORE NORTH ZHOUSHAN ISLANDS AND PALAEO-ENVIRONMENTAL IMPLICATIONS
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摘要: 利用在东海舟山北部海域获取的我国目前最深的全取心钻孔DZS2孔240.1 m深沉积物岩心进行孢粉分析鉴定,通过对松散地层的孢粉研究自下而上划分出了9个孢粉组合带、12个气候期,由孢粉组合带变化反映出的该区第四纪早更新世以来的温干-偏冷干-转暖转湿润-温凉偏干-温凉干旱-转暖转湿润-温凉湿润-转暖湿润-温暖偏干-温和偏干-温暖湿润的气候特点与区域性的气候变化比较符合。借助AMS 14C、OSL测年和古地磁测试结果,分析了上新世以来舟山北部海域上新世以来的气候与环境演化特征,进一步丰富了该海区的新生界的孢粉学资料,为该海区第四纪地层划分和对比提供了证据。Abstract: 9 palynological assemblages and 12 climatic stages are recognized based on the spore-pollen records of the coring hole DZS2 (240.1 meter-long) in the offshore area to the north Zhoushan Islands, East China Sea. It is up to date the deepest whole coring hole in that part of China. Quaternary climatic stages are established in a succession as follows:temperate-dry, a little cold-dry, warm and moist, temperate-cold and a little dry, temperate-cold and dry, warm and moist, temperate-cold and moist, warm and moist, warm and a little dry, temperate and a little dry, warm and moist. The local fluctuations of climate coincide with regional climate changes. Combined with dating data of AMS 14C, OSL and palaeomagnetism, the Pliocene evolution of climate and environment in the area off the north Zhoushan Islands are discussed. The palynological data has laid solid basis for Pliocene stratigraphic classification and correlation in the offshore North Zhoushan area.
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Key words:
- Spore-pollen /
- palaeo-environment /
- climate change /
- Quaternary /
- North Zhoushan Offshore Area
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[1] 蓝先洪,张志珣,郭兴伟,等.东海陆架SKE-1孔微量元素地球化学特征与物源意义[J].现代地质,2013,27(6):1323-1331.
[LAN Xianhong, ZHANG Zhixun, GUO Xingwei, et al. Geochemical characteristics of trace elements of sediments from drillhole SFK-1 in the continental shelf of the East China Sea and the source implication[J], Geoscience, 2013, 27(6):1323-1331.]
[2] 李从先,范代读.全新世长江三角洲的发育及其对相邻海岸沉积体系的影响[J].古地理学报,2009,11(1):115-122.
[LI Congxian, FAN Daidu. Development of the Holocene Changjiang delta and its influence on adjacent coastal sedimentary systems[J]. Journal of Palaeogeography, 2009, 11(1):115-122.]
[3] 张志忠,邹亮,韩月.舟山北部海域海底淡水资源研究[J]. 地质论评,2011, 57(1):81-86.
[ZHANG Zhizhong, ZOU Liang, HAN Yue. Primary study on submarine freshwater resources in north Zhoushan sea area[J].Geological Review, 2011, 57(1):81-86.]
[4] 张玉兰,姜立征,王开发,等.从孢粉分析看上海地区更新世时期古植被、古环境演变[J].海洋通报,2001,20(3):51-59.
[ZHANG Yulan, JIANG Lizhu, WANG Kaifa, et al. Evolution of Paleovegetation and Palaeoenvironment of Pleistocene on the Basis of Spore-Pollen Analysis in the Shanghai Region[J]. Marine Science Bulletin, 2001,20(3):51-59.]
[5] 李珍,李杰,李贞,等. 浙江嵊泗海域第四纪沉积层序及承压水层位特征初探[J].上海地质, 2008(2):7-13.[LI Zhen, LI Jie, LI Zhen, et al. The primary research on the Quaternary stratigraphic sequence and the characteristics of the water-bearing stratum in the sea of Shengsi area, Zhajiang province[J]. Shanghai Geology, 2008
(2):7-13.]
[6] 邱金波,李晓.第四纪地层与沉积环境[M].上海:上海科学技术出版社,2007.[QIU Jinbo, LI Xiao. Shanghai Quaternary strata and sedimentary environment[M]. Shanghai:Shanghai Science and Technology Press, 2007.]
[7] 黎兵, 魏子新, 李晓, 何中发, 等.长江三角洲第四纪沉积记录与古环境响应[J].第四纪研究, 2011,31(2):316-325.
[LI Bin, WEI Zixin, LI Xiao, HE Zhongfa, et al. Records from Quaternary sediment and palaeo-environment in the Yangtze River delta[J]. Quaternary Sciences, 2011, 31(2):316-325.]
[8] 缪卫东,李世杰,王润华. 长江三角洲北翼J9孔岩芯沉积特征及地层初步划分[J]. 第四纪研究,2009, 29(1):126-134.
[MIU Weidong, LI Shijie, WANG Runhua. Preliminary study on sedimentary characteristics and stratum division of J9 core in the north wing of the Yangtze River delta[J]. Quaternary Sciences, 2009, 29(1):126-134.]
[9] 魏子新,翟刚毅,严学新. 上海城市地质图集[M].北京:地质出版社,2010.[WEI Zixin, ZHAI Gangyi, YAN Xuexin. Atlas of Shanghai urban geology[M]. Beijing:Geology Press, 2010.]
[10] [11] Saito Y, Katayama H, Ikehara K, et al. Transgressive and high-stand system tracts and post-glacial transgression, the East China Sea[J]. Sedimentary Geology, 1998, 122:217-230.
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