本文關鍵詞：人工島建設對龍口灣表層沉積物粒度及黏土礦物組成特征的影響　出處：《海洋科學進展》2016年04期 　論文類型：期刊論文

  更多相關文章： 沉積物 粒度 黏土礦物 組成特征

【摘要】：通過對2013年采自龍口灣的表層沉積物樣品進行激光粒度分析和X-射線衍射(XRD)分析,根據(jù)其表層沉積物粒度及黏土礦物組成分布特征,來探討大規(guī)模人工島建設對龍口灣表層沉積物粒度分布及黏土礦物組成特征的影響。結(jié)果表明,龍口灣沉積物粒度以粉砂為主(62.90%),黏土(18.05%)和砂(19.05%)的質(zhì)量分數(shù)相近。龍口灣表層沉積物的黏土礦物組成與萊州灣整體沉積物組成相近,其不同組分質(zhì)量分數(shù)表現(xiàn)為伊利石蒙皂石綠泥石高嶺石,但個別礦物的含量仍存在一定差異。表層沉積物粒度分布及黏土礦物的組合特征表明,盡管龍口灣的沉積物仍以沿岸河流輸沙、風沙和島岸侵蝕為主,但沿岸大規(guī)模人工島建設已對其組合特征產(chǎn)生重要影響。粒度組成上黏土質(zhì)量分數(shù)略有升高,砂質(zhì)量分數(shù)略有下降;黏土礦物組成上表現(xiàn)為蒙皂石的最大質(zhì)量分數(shù)升高24.55%,綠泥石和高嶺石的最大質(zhì)量分數(shù)均下降35%左右,而伊利石質(zhì)量分數(shù)最高且變化不大。通過對龍口灣表層沉積物粒度分布及黏土礦物組成特征的研究,可在一定程度上揭示大規(guī)模人工島建設對龍口灣的沉積環(huán)境的影響。
[Abstract]:According to the 2013 collected samples of surface sediments from Longkou Bay by laser particle size analysis and X- ray diffraction (XRD) analysis, according to the composition and distribution of the surface sediment grain size and clay minerals, to investigate the impact of large-scale artificial island construction of Longkou Bay surface sediment grain size distribution and clay mineral composition characteristics. The results show that the grain size of Longkou Bay is mainly silty sand (62.90%), and the mass fraction of clay (18.05%) and sand (19.05%) is similar. Surface sediments of Longkou clay mineral composition and Laizhou Bay sediments are similar, the different mass fraction is illite smectite chlorite kaolinite mineral content, but there are still some differences in the individual. The particle size distribution of the surface sediments and the combination characteristics of clay minerals indicate that although the sediment of Longkou Bay is still dominated by sediment transport, wind sand and Island bank erosion along the coast, the construction of large-scale coastal island has had an important impact on its combination characteristics. The size composition of clay content increased slightly, the quality of the sand fraction decreased slightly; clay mineral composition showed the largest mass fraction of smectite increased 24.55%, the maximum mass fraction of chlorite and kaolinite decreased by about 35%, while the highest concentration of illite with little change. By studying the particle size distribution and clay mineral composition characteristics of surface sediments in Longkou Bay, we can reveal the influence of large-scale artificial island construction on the sedimentary environment of Longkou bay to a certain extent.
【作者單位】： 青島大學化學科學與工程學院;福建師范大學地理研究所濕潤亞熱帶生態(tài)地理過程教育部重點實驗室;中國科學院煙臺海岸帶研究所海岸帶環(huán)境過程重點實驗室;魯東大學地理與規(guī)劃學院;
【基金】：中國科學院重點部署項目——北方典型海岸帶水動力變化和復合污染機制及其生態(tài)損害評估課題Ⅰ:人工填海、造島對近岸水動力及物質(zhì)輸運的影響機制與數(shù)值模擬任務-填海工程影響下潮間帶及鄰近海域沉積環(huán)境變化研究(KZZD-EW-14);中國科學院“一三五”規(guī)劃生態(tài)突破項目——黃河三角洲陸海界面過程、生態(tài)演變與修復技術課題Ⅰ:黃河水沙運移、沉積與生態(tài)演變(Y254021031) 國家自然科學基金項目——黃河口生態(tài)恢復工程對濕地氮循環(huán)關鍵生物地球化學過程的影響(41171424)和黃河口新生濕地系統(tǒng)碳氮循環(huán)關鍵過程隊外源氮輸入的響應(41371104)
【分類號】：P756.8;P736
【正文快照】： 4.魯東大學地理與規(guī)劃學院,山東煙臺26402)龍口市入選山東半島藍色經(jīng)濟區(qū)核心區(qū),但其發(fā)展明顯受到陸域狹小、空間資源不足的限制,為解決該問題,保持經(jīng)濟的持續(xù)穩(wěn)定增長,采用了人工島式填海和區(qū)塊組團式填海相結(jié)合的方式建設離岸人工島群[1]。離岸人工島群的建設勢必會改變龍口

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