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渤海湾西北岸全新世埋藏牡蛎礁建造记录中的间断及其解释

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文章导航 > 海洋地质与第四纪地质 > 2006 > 26(5): 27-35

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范昌福, 高抒, 王宏. 渤海湾西北岸全新世埋藏牡蛎礁建造记录中的间断及其解释[J]. 海洋地质与第四纪地质, 2006, 26(5): 27-35.
引用本文: 范昌福, 高抒, 王宏. 渤海湾西北岸全新世埋藏牡蛎礁建造记录中的间断及其解释[J]. 海洋地质与第四纪地质, 2006, 26(5): 27-35.
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FAN Chang-fu, GAO Shu, WANG Hong. INTERPRETING THE HIATUS IN HOLOCENE OYSTER REEFS ON THE NORTHWEST COAST OF BOHAI BAY[J]. Marine Geology & Quaternary Geology, 2006, 26(5): 27-35.
Citation: FAN Chang-fu, GAO Shu, WANG Hong. INTERPRETING THE HIATUS IN HOLOCENE OYSTER REEFS ON THE NORTHWEST COAST OF BOHAI BAY[J]. Marine Geology & Quaternary Geology, 2006, 26(5): 27-35.
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渤海湾西北岸全新世埋藏牡蛎礁建造记录中的间断及其解释

  • 1 南京大学 海岸与海岛开发教育部重点实验室, 南京 210093;

  • 2 天津地质矿产研究所, 天津 300170

  • 基金项目:

    天津市科委项目(043112711)

    国家自然科学重点基金项目(40231010)

详细信息
    作者简介: 范昌福(1979-),男,博士生,从事牡蛎礁环境研究,E-mail:tjfchangfu@cgs.gov.cn

  • 中图分类号: P736.2

INTERPRETING THE HIATUS IN HOLOCENE OYSTER REEFS ON THE NORTHWEST COAST OF BOHAI BAY

  • 1 Ministry of Education Key Laboratory of Coastal and Island Development, Nanjing University, Nanjing 210093, China;

  • 2 Tianjin Institute of Geology and Mineral Resources, CGS, Tianjin 300170, China

    摘要
  • 渤海湾西北岸沿海平原的众多埋藏牡蛎礁体内部,除正常牡蛎壳堆积层外,还存在一些水平夹层,以往的文献对其成因有多种解释。对渤海湾西北岸埋藏牡蛎礁体中所含水平夹层特征进行了研究,并与江苏海岸南部现代活体牡蛎礁顶部沉积特征进行对比,结果表明渤海湾埋藏礁体中局部范围内分布的水平夹层与江苏海岸活礁体顶部的现代沉积相似,其特征与礁体生长时的局部水动力条件有关;但是,江苏海岸活牡蛎礁顶部的现代沉积特征不同于那些大范围分布于埋藏礁体内的水平夹层的特征,后者的成因尚待进一步研究。礁体剖面记录的垂向层序,在反映环境演化的同时,也反映了礁体生长时的平面特征。
    Buried oyster reefs are widely distributed over the coastal areas in the northwest of the Bohai Bay. Within the reef bodies, besides normally built-up sediment layers, there are some horizontal layers, which are mostly composed of debris of oyster shells and muddy materials. Various views exist with regard to the causes of these horizontal layers. One disagreement is concerned with whether or not the oyster hiatus presented in the reef body over the region reflects change in the coast environmental conditions in relation to sea-level, climate and storm characteristics. Some researchers have argued that the deposition rate or mechanical factors such as collapse of the reef body in response to overloading plays a role. In this study, we present the evidence from field investigations for the deposition patterns on the Xiaomiaohong living oyster reef, which is located in the vicinity of a tidal channel on the southern Jiangsu coast, to interpret the possible controlling factors on the formation of the horizontal layers in the Dawuzhuang buried oyster reefs in the Bohai Bay.The results indicate that the horizontal layers with a spatially limited distribution pattern, as revealed in the vertical section in the Bohai Bay buried reefs, share the same characteristics as the present day patterns on the top of the living oyster reef on the Jiangsu coast. These horizontal layers are not correlated with local climate changes; rather, they might have been formed by localized high energy hydrodynamic conditions during the reef building-up, as is the case for the Xiaomiaohong living reef. However, in the present environment of the Xiaomiaohong living reef, there are no horizontal layers that are continuously distributed over a large area; such layers, however, are present in the Bohai Bay reefs. Further research is required to understand the processes for the formation of this type of horizontal layers. The vertical sequence of buried reefs records the processes during reef building-up, in addition to paleo-environmental changes.
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收稿日期:  2006-01-12
修回日期:  2006-03-17

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