30 2 2012 4 ACTA SEDIMENTOLOGICA SINICA Vol. 30 No. 2 Apr. 2012 1000-0550 2012 02-0318-07 1 X 266100 X X X Matlab X X X X 1984 E-mail difan@ ouc. edu. cn P512. 2 A 0 X X 1 X Matlab X X 1 2 3 X 10-2 ~ 10 2 X X X DeMaster 4 1985 X X X 5 6 7 8 Genty 9 10 256 1 X 1 40976020 41030856 2010CB951202 2010-08-01 2011-05-05
1 X 319 X X 2 2. 1 18 122 37. 132' E 31 00. 990'N 2006 6 2 20. 4 m 1 1 TWWC YSCC ECSCC Fig. 1 Study area and sampling site TWC - the Taiwan Warm Current YSCC - the Yellow Sea Coastal Current ECSCC - the East China Sea Coastal Current. The shaded areas denote muddy deposition X 98% 2% X 37 ~ 38 cm 93 ~ 95 cm Photoshop X 3B 2 2. 3. 2 X 2. 2 X SIEMENS FX X Matlab7. 0 imread 2 18 Fig. 2 Grain-size compositions of Core 18 18 X 16 ma /70keV X 3A 2. 3 2. 3. 1 X 0 ~ 55 cm
320 30 3 18 X A. X B. X Fig. 3 X-ray negative of Core 18 A. original X-ray negative B. processed X-ray negative rgb2gray 4 550 30 0. 1mm 6 1 5 10 15 20 25 30 6 5 X 70 ~ 100 6 4 18 X Fig. 4 The gray image of X-ray radiograph 11 cm 26 cm 38 cm negative of Core 18 1 18 X Table 1 The matrix of the gray image of X-ray radiograph negative of Core 18 82 85 91 94 92 95 96 95 93 94 90 87 88 92 92 94 97 95 90 75 49 44 55 53 58 66 64 65 68 84 82 85 92 95 93 95 96 95 94 95 89 87 88 92 92 94 96 95 91 77 54 49 57 56 61 69 69 67 71 85 86 86 94 98 97 98 98 94 94 97 92 88 87 90 90 93 94 93 92 85 75 71 75 73 78 83 83 83 85 92 89 87 96 101 102 101 98 93 95 99 93 89 86 89 89 90 92 92 94 94 95 93 92 90 96 98 98 99 98 98 89 88 95 100 102 100 96 92 95 98 94 90 84 87 89 90 90 91 94 96 103 101 100 99 104 104 103 103 103 100 87 89 93 96 97 97 94 92 95 95 92 89 86 88 89 89 89 90 93 91 96 97 97 98 101 101 99 98 100 99
1 X 321 5 18 A - F 5 10 15 20 25 30 Fig. 5 The gray values curves of the Core 18 6 6 30 2 24 cm 38 cm X 38 cm C Table 2 2 6 n = 550 Correlations of the 6 rows of the gray values n = 550 A B C D E F A 1 0. 721 0. 639 0. 464 0. 223 0. 216 B 1 0. 746 0. 575 0. 307 0. 307 C 1 0. 715 0. 425 0. 42 D 1 0. 573 0. 489 E 1 0. 73 F 1 **. Correlation is significant at the 0. 01 level 2-tailed. 3 X X X 6 18 Fig. 6 The curves of mean grain-size and gray value in Core 18 3. 1 0. 25 cm A. B. A. gray value B. mean grain-size
322 30 7 Y = 0. 8665X - 62. 527 R 2 = 0. 80 8 8 0. 69 0. 39 0. 68 X X X X 47. 67 94. 13% X 3. 2 7 Fig. 7 The correlation between gray value and mean grain-size 18 X 11 X 9 X X 9 X 1 ~ 8 Ⅰ. Ⅱ. Ⅲ. Fig. 8 The correlations between gray value and sand silt and clay Ⅰ. gray value and sand content Ⅱ. gray value and silt content Ⅲ. gray value and clay content
1 X 323 4 1 X 2 X 3 X References 1. J. 2002 47 21 1613-1619 Sun Donghuai Liu Yu Tan Ming. The application and analysis of the digital image of paleoenvironmental records J. Chinese Science Bulletin 2002 47 21 1613-1619 2. J. 2007 27 5 690-699 Yang Zuosheng Cheng Xiao. Centurial high resolution records of sediment grain-size variation in the mud area off the Changjiang Yangtze River estuary and its influencial factors J. Quaternary Science 2007 27 9 18 5 690-699 Fig. 9 The grain-size normalized gray curve of core 18 3. Bio-Si J. 2009 39 3 cm 10 ~ 12 cm 5 1025-1028 Fan Dejiang Qi Hongyan Sun Xiaoxia et al. A 2. 1 cm /a 3 new method to evaluating sedimentary rate on the Yangtze River subaqueous delta Seasonal sedimentary record of Bio-Si J. Periodical of 1 4 1 Ocean University of China 2009 39 5 1025-1028 4 4 DeMaster D J McKee B A Nittrouer C A et al. Rates of sediment ENSO accumulation and particle reworking based on radiochemical measurements from continental shelf deposits in the East China Sea J. Conti- nental Shelf Research 1985 4 1-2 143-158 5 Kniskern T A Kuehl S A. Spatial and temporal variability of seabed disturbance in the York River subestuary J. Estuarine Coastal and Shelf Science 2003 58 37-55 6 Bentley S J Sheremet A JaegerJ M. Event sedimentation bioturbation and preserved sedimentary fabric Field and model comparisons in 3 three contrasting marine settings J. Marine Geoglogy 2006 26 17- X 4 18 2108-2124 7. J. 2008. 39 6 578-584 Fan Dejiang Xu Lin Qi Hongyan. Bioturbation in surficial sediment of subaqueous X 1 Changjiang river delta J. Oceanologia et Limnologia Sinica 2008 4 39 6 578-584 8.
324 30 J. 2008 23 9 932-941 Yang Qunhui Zhou Huaiyang Ji Fuwu et al. Bioturbation in seabed sediments and its effects on marine sedimentary processes and records J. Advances in Earth Sciences 2008 23 9 932-941 J. D 2000 30 3 240-248 Qin Xiaoguang Liu Dongsheng Tan Ming et al. The micro level gray scale characteristics of Beijing Shihuadong stalagmite and its climatic Significance J. Science in China Series D 2000 30 3 240-9 Genty D Baker A Maire R. Comparison of annual luminescent and 248 visible laminae in stalagmites Comptes Rendus DeL Academie des Sciences Ser Ⅱ. Fascicule A J. Sciences Dela Terreet des Planetes 1997 325 193-200 11. J. 1998 15 2 42-45 Jiao Chunwen. Study on anti scour test in rock river bed by project comparison method J. Journal of Yangtze 10. River Scientific Research Institute 1998 15 2 42-45 The Gray Value of X-ray Radiograph in Sediment Core and Its Influencing Factors ZHANG Xi-lin FAN De-jiang LIU Ming WANG Liang College of Marine Geosciences Key Laboratory of Submarine Geosciences and Technology of Ministry of Education Ocean University of China Qingdao Shandong 266100 Abstract X-ray radiograph of sedimentary core contains much information including sedimentary texture density structure etc. We can quickly extract the information of climate and environment changes from sedimentary core by using digital image processing method witch may be a powerful research tools to exploring high-resolution sedimentary records and palaeo-environment evolution. Based on the matlab software platform we obtained the X-ray images of the sediment core taken from the subaqueous Yangtze River delta and changed them into digital gray images then for extracting their gray values. Combined with the sediment properties in the core such as grain size parameters influencing factors of the digital gray values were discussed. The results indicate that the gray values of sediment core are influenced comprehensively by sediment composition texture and structure with being dominantly influenced by sediment grain-size. There is a good linear relationship between mean grain-size and gray value. Furthermore there is a positive correlation between sand silt and gray value. In contrary it is of a good negative relationship between clay and gray value. Generally the X-ray image gray value of sediment core may be an ideal proxy of comprehensive sedimentary records. Key words sediment core X-ray radiograph gray value grain-size influencing factor