GRAIN SIZE DISTRIBUTION OF SURFACE SEDIMENTS IN JIAOZHOU BAY AND ITS ENVIRONMENTAL SIGNIFICANCE
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摘要:
通过对胶州湾44个表层沉积物样品粒度组分进行分析,探讨了该区表层沉积物粒度特征和沉积物类型;并以沉积物组分分布和粒度特征为依据对沉积物进行聚类分析,结合其周边河流以及海底地貌分布,对其沉积环境进行了划分。结果表明,研究区沉积物类型主要有砂质粉砂、粉砂、粉砂质砂和泥;沉积物主要粒级为1.1Φ~7.1Φ,优势粒级为5Φ~7Φ,平均值为5.7Φ,粉砂的平均含量达到58.6%,砂、黏土的平均含量为23.6%和17.3%。将研究区沉积环境划为4类:湾顶及东部近岸浅水区域(I),大沽河—洋河水下三角洲区域(Ⅱ),湾西南部及中部深水区域(Ⅲ)和沧口砂脊周边及湾口区域(Ⅳ)。
Abstract:44 surface sediment samples were collected from the Jiaozhou Bay of Shandong Peninsula for study of grain size distribution patterns and sediment types. Upon the basis, modern sedimentary environment is classified with grain size parameters and their relation with geographic locations using the method of system cluster. The result indicates that sediment samples of the study area are characterized by sandy silt, silt, silty sand, clayey silt and mud. The mean grain size varies from 1.1Φ to 7.1Φ, with an average of 5.7Φ. The silt dominates the deposits, which reaches 58.6% in average, and the average contents of sand and clay are only 23.6% and 17.3% respectively. The research area is divided into 4 different depositional zones.Ⅰ)the zone of bay top and shallow water area near the east coast.Ⅱ)the region of Daguhe River and Yanghe River underwater delta.Ⅲ)the southwest and central regions of the bay.Ⅳ)the periphery of Cangkou sand ridge and the bay mouth.
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Key words:
- Jiaozhou Bay /
- sediment /
- grain size characteristics /
- sedimentary environment
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图 1 胶州湾取样站位和沉积类型分布(胶州湾地貌分类据文献[9]修改)
Figure 1.
表 1 不同沉积物类型组分及粒度参数特征值
Table 1. Grain size parameters of various sediments
类型 特征值 砂/% 粉砂/% 黏土/% 平均粒径/Φ 分选系数/Φ 偏度系数 峰度系数 平均值 26.6 57.2 16.3 5.6 2.2 0.1 0.8 砂质粉砂 最大值 49.5 72.2 28.8 6.9 3.4 0.5 1.6 最小值 1.5 37.6 9.4 4.3 1.8 -0.2 0.7 平均值 5.3 72.6 22.1 6.7 1.7 0.0 1.0 粉砂 最大值 14.4 80.7 31.2 7.1 2.1 0.3 1.1 最小值 1.4 62.7 15.4 6.4 1.5 -0.1 0.8 平均值 62.9 22.7 8.4 2.9 2.8 0.4 0.8 粉砂质砂 最大值 76.4 36.0 11.3 4.7 3.3 0.6 1.1 最小值 52.7 12.0 5.0 1.1 1.8 0.3 0.6 表 2 胶州湾各沉积区表层沉积物组分及粒度参数特征值
Table 2. Grain size parameters in various sedimentary areas
沉积区 特征值 砂/% 粉砂/% 黏土/% 平均粒径/Φ 分选系数/Φ 偏度系数 峰度系数 平均值 4.0 73.6 22.3 6.7 1.7 0.0 0.9 Ⅰ 最大值 8.4 80.7 31.2 7.1 1.9 0.3 1.1 最小值 1.4 67.4 15.4 6.4 1.5 -0.1 0.9 平均值 34.9 51.6 13.5 5.2 2.2 0.2 0.9 Ⅱ 最大值 52.7 61.5 16.6 5.7 2.5 0.6 1.6 最小值 21.9 36.0 9.4 4.6 1.8 -0.2 0.7 平均值 14.6 66.8 18.6 6.2 1.9 0.0 0.9 Ⅲ 最大值 20.9 75.7 28.6 7.0 2.1 0.3 1.1 最小值 5.5 61.1 13.9 5.8 1.6 -0.1 0.8 平均值 42.0 41.9 14.1 4.6 2.7 0.2 0.7 Ⅳ 最大值 76.4 62.7 22.9 6.4 3.4 0.6 0.9 最小值 14.4 12.0 5.0 1.1 2.1 -0.2 0.6 -
[1] Hartmann P C, Quinn J G, Cairns R W, et al. Depositional history of organic contaminants in Narragansett Bay, Rhode Island, USA [J]. Marine Pollution Bulletin, 2005, 50(4): 388-395. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=0e852d2abbf9b3a3b7d72a834a8daaac
[2] Flemming B W. The influence of grain-size analysis methods and sediment mixing on curve shapes and textural parameters: Implications for sediment trend analysis [J]. Sedimentary Geology, 2007, 202(3): 425-435. http://cn.bing.com/academic/profile?id=464db784ae959c4f03d36b1ed6d5560e&encoded=0&v=paper_preview&mkt=zh-cn
[3] Brooks G R, Doyle L J, Davis R A, et al. Patterns and controls of surface sediment distribution: west-central Florida inner shelf [J]. Marine Geology, 2003, 200(1): 307-324. http://cn.bing.com/academic/profile?id=93beaf0ba025eafaac25d6883b541cc2&encoded=0&v=paper_preview&mkt=zh-cn
[4] Lim D I, Jung H S, Choi J Y, et al. Geochemical compositions of river and shelf sediments in the Yellow Sea: Grain-size normalization and sediment provenance [J]. Continental Shelf Research, 2006, 26(1): 15-24. http://cn.bing.com/academic/profile?id=dc4c6ddff355f2ebde55b2eb034b1c01&encoded=0&v=paper_preview&mkt=zh-cn
[5] 杨阳, 高抒, 周亮, 等.海南新村港湖表层沉积物粒度特征及其沉积环境[J].海洋学报, 2016(1):94-105. doi: 10.3969/j.issn.0253-4193.2016.01.009
[6] 赵利, 彭学超, 钟和贤, 等.南海北部陆架区表层沉积物粒度特征与沉积环境[J].海洋地质与第四纪地质, 2016(6):111-122. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201606014
[7] 徐东浩, 李军, 赵京涛, 等.辽东湾表层沉积物粒度分布特征及其地质意义[J].海洋地质与第四纪地质, 2012, 32(5):35-42. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201205005
[8] 李玉中, 陈沈良.系统聚类分析在现代沉积环境划分中的应用——以崎岖列岛海区为例[J].沉积学报, 2003, 21(3):487-494. doi: 10.3969/j.issn.1000-0550.2003.03.019
[9] 王玉海, 刘自力, 纪育强, 等.海侵驱动下的胶州湾沙脊-水道体系形成与演变[J].水道港口, 2009, 30(5):311-315. doi: 10.3969/j.issn.1005-8443.2009.05.002
[10] 汪亚平, 高抒, 贾建军.胶州湾及邻近海域沉积物分布特征和运移趋势[J].地理学报, 2000, 55(4):449-458. doi: 10.3321/j.issn:0375-5444.2000.04.007
[11] 张珂, 王朝晖, 冯杰, 等.胶州湾表层沉积物重金属分布特征及污染评价[J].分析测试学报, 2011, 30(12):1406-1411. doi: 10.3969/j.issn.1004-4957.2011.12.015
[12] 贾永刚, 孙永福, 单红仙.胶州湾工程地质环境质量综合评价区划[J].海洋地质与第四纪地质, 1999, 19(3):121-126. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz199903014
[13] 李平, 李常珍.胶州湾建港的地质环境[J].海洋科学, 1999, 23(5):27-30. doi: 10.3969/j.issn.1000-3096.1999.05.012
[14] 盛茂刚, 崔峻岭, 时青, 等.青岛市环胶州湾各河流输沙特征分析[J].水文, 2014, 34(3):92-96. doi: 10.3969/j.issn.1000-0852.2014.03.017
[15] 姜德娟, 王晓利.胶东半岛大沽河流域径流变化特征[J].干旱区研究, 2013, 30(6):965-972. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ghqyj201306004
[16] 肖菲, 尹延鸿.青岛海岸带及邻近海域地形和沉积物类型研究[J].海洋地质动态, 2006, 22(10):1-4. doi: 10.3969/j.issn.1009-2722.2006.10.001
[17] 阎新兴, 吴明阳, 刘国亭.胶州湾地貌特征及海床演变分析[J].水道港口, 2000(4):23-29. doi: 10.3969/j.issn.1005-8443.2000.04.005
[18] Mcmanus J. Grain size determination and interpretation [M]. Techniques in Sdimentology. Oxford, UK: Blackwell Scientific Publications, 1988.
[19] Folk R L, Ward W C. Brazos river bar: A study in the significance of grain size parameters [J]. Journal of Sediment Petrology, 1957, 27(1): 3-26. doi: 10.1306/74D70646-2B21-11D7-8648000102C1865D
[20] Roux J P L, Rojas E M. Sediment transport patterns determined from grain size parameters: Overview and state of the art [J]. Sedimentary Geology, 2007, 202(3): 473-488. http://cn.bing.com/academic/profile?id=b32d4e451a7220758d6e8056d3e99d90&encoded=0&v=paper_preview&mkt=zh-cn
[21] 陈敬安, 万国江.洱海近代气候变化的沉积物粒度与同位素记录[J].自然科学进展, 2000, 10(3):253-259. http://www.cnki.com.cn/Article/CJFDTotal-ZKJZ200003010.htm
[22] 戴纪翠, 宋金明, 郑国侠.胶州湾沉积环境演变的分析[J].海洋科学进展, 2006, 24(3):397-406. doi: 10.3969/j.issn.1671-6647.2006.03.020
[23] 吕海龙, 杜德文, 石学法.基于测深数据的胶州湾底质类型估计方法[J].海洋科学进展, 2004, 22(3):328-333. doi: 10.3969/j.issn.1671-6647.2004.03.010
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