| 引用本文： |
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黎广钊,农华琼,刘敬合.防城湾自然环境与沉积物组成分析[J].广西科学院学报,1997,(4):1-8. [点击复制]
- Li Guangzhao,Nong Huaqiong,Liu Jinghe.Analysis of the Natural Environment and Surface Sedimental Composition from Fangcheng Bay[J].Journal of Guangxi Academy of Sciences,1997,(4):1-8. [点击复制]
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| 摘要: |
| 讨论防城湾水动力条件、地貌特征及沉积物组成。其中,水下动力地貌有6种类型:潮间浅滩、潮流冲刷深槽、水下拦门沙坝、水下沙嘴、水下岸坡、海底平原。表层沉积物类型有6种:砂砾、粗砂、粗中砂、中细砂、细砂、粉砂质粘土。沉积物中重矿物组合为钛铁矿-锆石-电气石。沉积物中有孔虫、介形虫,划分为4个组合带:卡纳利拟单栏虫组合;毕克卷转虫变种组合;毕克卷转虫-异地希望虫组合;毕克卷转虫变种-球室刺房虫-异地希望虫组合。 |
| 关键词: 水动力 动力地貌 表层沉积类型 重矿物 生物沉积 |
| DOI： |
| 投稿时间：1996-07-22修订日期：1997-04-18 |
| 基金项目: |
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| Analysis of the Natural Environment and Surface Sedimental Composition from Fangcheng Bay |
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Li Guangzhao, Nong Huaqiong, Liu Jinghe
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| (Guangxi Institute of Oceanology, Beihai, 536000) |
| Abstract: |
| The hydraulic dynamic conditioin, morphological feature and sedimental composition from Fangcheng Bay were discussed. There are six types of the underwater dynamic morphology in Fangcheng Bay:intertidal shoal, tidal current scour, underwater entrance bar, underwater sandy mouth, underwater slope, submarine plain. The surface sediment possess six types:sandy gravel, coarse sand, coarse middle sand,middle fine sand, fine sand,silty clay. The heavy minerals are named as ilmenite-zircon-tourmaline assemblage in the sediment. Foraminiferan and ostracod are abundant in the sediment. Its four assemblage zones can be divided as follows:Haplophragmoides cannariensis assemblage zone, distributed in river mouth forked course; Ammonia beccarii var. -H.cannariensis assemblage zone intertidal zone; A. baccarii var. -Elphidium advenum assemblage zone in underwater slope; A.beccarii var. -Schackoinella globosa-E.advenum assemblage zone in shallow sea. |
| Key words: Hydrauic dynarmics dynarmic morphology surface sediment type heavy mineral biogenic deposit |
