| 多金属结核海底照片图象处理结果的地质解释 |
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| 引用本文： | 朱克超,王公念.多金属结核海底照片图象处理结果的地质解释[J].海洋地质与第四纪地质,1997,17(3):53-62. |
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| 作者姓名： | 朱克超 王公念 |
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| 作者单位： | 地质矿产部广州海洋地质调查局 |
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| 摘 要： | 海底照片微机处理系统（ＮＩＲＳ）是多金属结核海底照片的处理系统，该系统可高效率地处理大量的海底照片，提高了照片的清晰度，获取了更多的地质信息，根据ＤＹ８５０１及ＤＹ８５－３航次照片处理结果，划盼出五咱照片类型，讨论照片处理质量的评价方法，在海氏分布状态，用照片估算丰度评价校正抓斗采样丰度的方法。ＤＹ８５－３航次全部单次照片的处理结果表明，在抓斗采样丰度中，埋藏型结核所占的比例很小；抓斗采样丰度受诸
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| 关 键 词： | 多金属结核 海底照相 图象处理 太平洋 |
CRITERIA FOR RECOGNITION OF ANCIENT CONTOURITES |
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| Li Rihui,Zhang Guangwei.CRITERIA FOR RECOGNITION OF ANCIENT CONTOURITES[J].Marine Geology & Quaternary Geology,1997,17(3):53-62. |
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| Authors: | Li Rihui Zhang Guangwei |
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| Abstract: | Three criteria(sedimentation,paleontology and paleogeography)for recognition of ancient contourites are discussed in this paper.Among the criteria ichnologic method is especially emphasized by the present authors. Nereites ichnofacies is found closely related with contourites in Ordovician period in China,especially network traces such as Paleodictyon and Neurodictyon (Li,1992)being the case.Futhermore as Crimes and Crossley (1980) pointed out,perfectly symmetrical hexagonal nets orientation is commonly parallel with that of sole marks and can be used as criterion to determine contour current trend. Because no effective criteria are found up to now,we hold that multiple methods should be used to recognise ancient contourites. |
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| Keywords: | contourite recognition Nereites ichnofacies Paleodictyon body fossils |
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