| 珠江三角洲晚第四纪沉积物的有机地球化学特征 |
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| 引用本文： | 蓝先洪.珠江三角洲晚第四纪沉积物的有机地球化学特征[J].热带海洋学报,1991(1). |
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| 作者姓名： | 蓝先洪 |
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| 作者单位： | 地质矿产部海洋地质研究所 青岛266071 |
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| 摘 要： | 本文根据有机地球化学资料,首次研究和探讨了珠江三角洲晚第四纪沉积物中有机质丰度和可溶有机质的组成特征。现代沉积物有机质丰度,有机碳为0.58％,氯仿沥青“A”为210ppm,烃含量为33.8ppm;钻孔中有机碳为0.77％,氯仿沥青“A”为253ppm,烃含量为16.4ppm。从有机质组成、红外吸收光谱特征、δ~(13)C、干酪根H/C原子比,均表现为陆生植物为主,水生生物为铺,为腐殖型或腐泥—腐殖型的母质类型。
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| 关 键 词： | 晚第四纪 沉积物 有机地球化学 有机质丰度 珠江三角洲 |
ORGANIC GEOCHEMICAL CHARACTERISTICS IN THE LATE QUATERNARY SEDIMENTS OF THE PEARL RIVER DELTA |
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| Lan Xianhong.ORGANIC GEOCHEMICAL CHARACTERISTICS IN THE LATE QUATERNARY SEDIMENTS OF THE PEARL RIVER DELTA[J].Journal of Tropical Oceanography,1991(1). |
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| Authors: | Lan Xianhong |
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| Abstract: | The organic geochemical data in the Late Quaternary sediments of the Pearl River Delta show that the contents of organic matter in modern sediments are richer. Compared with similar sediments in the east of China,organic carbon,chloroform asphalt A and hydrocarbon abundances are obviously high in the studied area. This is relevant to the Pearl River Delta being situated in the subtropical and tropical zone,with luxuriant vegetation.
The contents of organic matter in the Late Quaternary stratum of drill hole A22 are higher than that of modern sediments. The distribution curve of n-alkane in the Late Quaternary sediments of Pearl River Delta is represented by a single peak with an odd-even predominance and a high-carbon major peak. The distribution curve is similar to that of the n-alkane of Artemisia from modern sediments in the Songliao Basin. The compositions of the organic matter, spectrum characteristics, 13C and H/C of kerogen display that the terrestrial plants are predominant, water organisms subsidiary, and the source rocks are humic or humic-sapropelic matter. |
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| Keywords: | Late Quaternary sediment organic geochemistry abundance of organic matter composition of dissolved organic matter Pearl River Delta |
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