舟山北部海域海底第四系淡水资源赋存潜力
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摘要
为了解东海舟山北部海域海底第四系淡水资源赋存情况,本文在系统分析舟山北部海域地质钻孔和单道地震资料基础上,分析了研究海域海底第四纪地层结构与沉积环境,阐述了研究海域海底松散沉积物分布规律,探讨了上海陆地地区早更新世中、晚期和早期古河道在研究海域的延伸和分布状况,分析了研究海域海底第四系含水层赋存状况。研究海域第四系可供开发利用的主要含水层为早更新世中、晚期的第四承压含水层(Ⅳ)和早更新世早期的第五承压含水层(Ⅴ);第四承压含水层古河道分布区富水性最佳,含水层顶部发育厚层黏性土隔水层区域赋存淡水资源的可能性很大,含水层开发利用潜力可分为开发前景良好A区、开发前景较好B区和开发前景一般C区3类;第五承压含水层在古河道分布区富水性强,具有很好的淡水赋存潜力和良好的开发利用前景。
To comprehend occurrence potential condition of submarine Quaternary freshwater resources in north Zhoushan sea area,Quaternary stratigraphic texture and sedimentary environment are analyzed based on drilling cores and high-resolution single-channel seismic profiles.Regularities of distribution of submarine loose sediment are elaborated.Extension and distribution of paleo-channels in middle and late Early-Pleistocene and early EarlyPleistocene form Shanghai land area and occurrence status of submarine Quaternary aquifer in the study sea area are discussed.The main exploitable Quaternary aquifers are the 4 th confined aquifer in middle and late Early-Pleistocene and the 5 th confined aquifer in early Early-Pleistocene.The water-abundance in the area of paleo-channels in the 4 th confined aquifer is best,the confined aquifer with thick upper clay confining layer may be prone to reserving freshwater resources.The exploitable potential is classified into three types:better development prospect(type A),good development prospect(type B)and general development prospect(type C).The water-abundance in the area of paleo-channel in the 5 th confined aquifer is also good,in which the reserving capacity and prospect of development and utilization are favorable.
To comprehend occurrence potential condition of submarine Quaternary freshwater resources in north Zhoushan sea area,Quaternary stratigraphic texture and sedimentary environment are analyzed based on drilling cores and high-resolution single-channel seismic profiles.Regularities of distribution of submarine loose sediment are elaborated.Extension and distribution of paleo-channels in middle and late Early-Pleistocene and early EarlyPleistocene form Shanghai land area and occurrence status of submarine Quaternary aquifer in the study sea area are discussed.The main exploitable Quaternary aquifers are the 4 th confined aquifer in middle and late Early-Pleistocene and the 5 th confined aquifer in early Early-Pleistocene.The water-abundance in the area of paleo-channels in the 4 th confined aquifer is best,the confined aquifer with thick upper clay confining layer may be prone to reserving freshwater resources.The exploitable potential is classified into three types:better development prospect(type A),good development prospect(type B)and general development prospect(type C).The water-abundance in the area of paleo-channel in the 5 th confined aquifer is also good,in which the reserving capacity and prospect of development and utilization are favorable.
引文
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[3]Vassilios K.Submarine groundwater discharge:Effects of hydrogeology and of near shore surface water bodies[J].Journal of Hydrology,2006,325(3):96-117.
[4]刘海龄,吴世敏,杨树康.初谈海底淡水资源的形成条件与开发意义[J].海洋科学,1995,10(5):32-33.Liu Hailing,Wu Shimin,Yang Shukang.On the formation condition and exploitation significance of seafloor freshwater resources[J].Marine Sciences,1995,10(5):32-33.
[5]刘海龄,吴世敏,魏常兴.论河口海底淡水资源的形成[J].自然资源学报,1998,13(4):364-367.Liu Hailing,Wu Shimin,Wei Changxing.On the formation of seafloor freshwater resources[J].Journal of Natural Resources,1998,13(4):364-367.
[6]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,2012,57(1):81-86.Zhang Zhizhong,Zou Liang,Han Yue.Primary study on submarine freshwater resources in north Zhoushan sea area[J].Geological Review,2012,57(1):81-86.
[7]Vincent E A,Jacobus G,Henk K,et al.Offshore fresh groundwater reserves as a global phenomenon[J].Nature,2013,504(12):71-77.
[8]张志忠,邹亮,杨振京,等.舟山北部海域DZS2钻孔孢粉记录与古环境[J].海洋地质与第四纪地质,2015,35(4):125-132.Zhang Zhizhong,Zou Liang,Yang Zhenjing,et al.Sporo-pollen records of borehole DZS2offshore north Zhoushan Islands and paleo-environmental implication[J].Marine Geology&Quaternary Geology,2015,35(4):125-132.
[9]邹亮,张志忠,韩月.长江口外海区DZS2孔第四纪磁性地层[J].海洋地质与第四纪地质,2015,35(2):43-52.Zou Liang,Zhang Zhizhong,Han Yue.Magneto-stratigraphy of Core DZS2off the Yangtze River estuary[J].Marine Geology&Quaternary Geology,2015,35(2):43-52.
[10]黎兵,魏子新,李晓,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 Bing,Wei Zixin,Li Xiao,et al.Records from Quaternary sediment and paleo-environment in the Yangtze River delta[J].Quaternary Sciences,2011,31(2):316-325.
[11]邱金波,李晓.上海市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.Quternary Strata and Depositional Environment of Shanghai[M].Shanghai:Shanghai Science and Technology Press,2007.
[12]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,2008,29(1):7-13.Li Zhen,Li Jie,Li Zhen,et al.The primary research on the Quaterrnary stratigraphic sequence and the characteristics of the water bearing stratum in the sea of Shengsi area,Zhajiang province[J].Shanghai Geology,2008,29(1):7-13.
[13]陆志坚.从上海地区地下淡水古河道含水的分布探讨嵊泗列岛的供水问题[J].上海地质,1989,10(1):23-26.Lu Zhijian.An approach to the water supply of the Shengsi Islands-from the distribution of the underground paleo-channels aquifer of freshwater in Shanghai area[J].Shanghai Geology,1989,10(1):23-26.