21 3 1998 () JOU RNAL O F NAN J IN G NORM AL UN IV ERS IT Y (N atural Science) V o l. 21 N o. 3 1998 Ξ, 3915000,.,, ( ).,,.,, 10, 0008, 500BP..,,. 10, 000,,..,,.,,.,,, P51213,,. 80,,,., 39 [1 ],, 15, 000a BP [2 ].,,. 1, :, [3 ] ;,, [4, 5, 6, 14 ] ;, ( ) [2, 7, 8, 9, 10, 11 ]. Ξ : 1998-04- 15. ( CU H K318g95H ). :, 210097,.,., 210098,. 95
() 21 3(1998),,, [9 ].,,.,,,,,,, [12 ] ;,,, [13 ].,,,.,,,,.,, [11 ] ; 44m, M 2 [15 ] ; [2 ],, ( ) [2 ].,,,,,., [7, 8, 10, 13, 16 ],,,M 2, [15 ].,,., [2 ] ;, U, 96 115, 000 ([ 19-28 ] )
: [15 ],,,.,, ( ).,,. 1 2 a b 7, 50026, 000a BPc 8, 500a BPd 10, 000a BP 2 10, 000 97
() 21 3(1998) a 8, 500a BPb 10, 000a BP12 3 10, 000a BP 8, 000a BP 98
: c d (7, 50026, 000a BP) 1 2 4 99
() 21 3(1998) 2,, 10, 000aBP [9 ] 8, 000aBP [13 ] 7, 00025, 000aBP [17 ] 4, 000aBP [16 ] 2, 000aBP [18 ]., 1128,, 1128 [4 8 ].,,,,. 2. 1( ),, 15, 000aBP 30(1), 30.,,,. 1, 10, 000aBP, (),,., (2), (3). 8, 500aBP,,.,, ( 2), ( 3)., 10, 00028, 500aBP,. 2. 2, 10, 0008, 500a BP,,,., ( 50m ) 100m, 30m [29 ],., 10, 0008, 500a BP., G151024m, ( 11m ) C 14 4, 550150a BP (5), 4, 500a BP. 8, 000a BP [13 ],,,,, 8, 000aBP. 49. 09m Q C 24, 000aBP [16 ] 31. 7m C 14 2, 135220aBP [18 ], :,,,,.,, 10, 0008, 500aBP,.,,.,,, 10, 0008, 500aBP. 100
: 3 5( [ 1 ]),, :,, [6, 9, 30 ] ;,, [3, 5, 7, 8, 10, 13, 31 ] ;, [16 ] ;,, [18, 32 ] ;, (), [12 ].,. (),, ;, ;. :,, [33 ]. (6), 1020m, 3040m.,,, [18 ].,,.,, (7). 101
() 21 3(1998),, 40, 000220, 000aBP ( 4),,.,,,.,,., [13 ], ( ). (),.,,.,,. 4 6( [ 10 ]) 10, 0008, 500aBP,,,. 4. 1,,. 10, 000aBP,,,. ( 3 4) ( ), 10, 000aBP (8). 8 : 10, 000,, 102
: 7 ( [ 18 ]),. (7, 5006, 000aBP ),, 120 E.,,,. 10, 000BP 125 E, 8, 500BP 123 E,., 10, 000aBP 20, 000aBP 30 N.,,,, :. 103
() 21 3(1998) 10, 000aBP 35 N, 8, 500aBP 34 N, 34 N.. 10, 000aBP,,. (7, 5006, 000aBP) 23. 8, 500aBP 2, 000BP,,., 10, 000aBP. 1 ( : abp; 1) 10, 000 8, 500 7, 500 2, 000 3 2 223 2 1 4. 2,,.,?, 10, 000aBP, 32. 5 N 121 E 31 N 123 E,,,.,, () (92D ). 8, 500aBP,,,,.,,, () (92D ). (7, 5006, 000aBP ), 3032. 5 N, 121 E,,, ( 4).,,, ( 92b).,,, (3032 N ), ( 92b)., ( ),. 4. 3 10000aBP,, :,,.,. 10, 000aBP,,, ( )., 35m [33 ] ( 024m [10 ] ) 10, 000aBP, 3035m, [29 ], 4060m, 530m., 10, 000aBP, 3034 N, 124 E ( 3B 1 B 2)., 10, 000aBP, 104
:., 060m 10, 000aBP.,,,,,.,,. :,,,.,,,. ( 11281855 ),. 1855,,,. 8 10, 000 ( ) a b (7, 50026, 000aBP) 9 105
() 21 3(1998) 2 (a BP) 10, 000 ( 060m ) 7, 5006, 000 ( 030m ) ( 030m ), 5 (mm ) (m ) 5 1. 89 2. 06 10 2. 40 2. 37 20 3. 24 2. 72 0. 004 30 3. 96 2. 95 40 4. 61 3. 13 50 5. 21 3. 27 60 5. 77 3. 39 5 0. 59 0. 68 10 0. 74 0. 78 20 0. 99 0. 89 0. 045 30 1. 20 0. 97 40 1. 40 1. 02 50 1. 57 1. 07 60 1. 74 1. 11 5 0. 43 0. 55 10 0. 52 0. 64 20 0. 66 0. 73 0. 125 30 0. 79 0. 79 40 0. 90 0. 84 50 1. 00 0. 88 60 1. 10 0. 92 5 0. 50 0. 79 10 0. 56 0. 90 20 0. 64 1. 04 0. 650 30 0. 69 1. 13 40 0. 74 1. 19 50 0. 78 1. 25 60 0. 82 1. 29 3 (m gs) (m gs) (mm ) (m ) 5 0. 71 0. 79 10 0. 89 0. 91 20 1. 20 1. 04 0. 030 30 1. 46 1. 13 40 1. 70 1. 20 50 1. 91 1. 25 60 2. 11 0. 30 5 0. 52 0. 61 10 0. 65 0. 70 20 0. 85 0. 81 0. 063 30 1. 03 0. 87 40 1. 19 0. 92 50 1. 34 0. 97 60 1. 48 1. 00 5 0. 42 0. 60 10 0. 48 0. 68 20 0. 58 0. 79 0. 250 30 0. 67 0. 86 40 0. 74 0. 91 50 0. 81 0. 95 60 0. 88 0. 98 :, [18, 34 ].,,. 10cm gs, 20cm gs; 30 N, 25cm gs; 5 15cm gs [34 ]., (3),, 10m 5cm gs, 50m 80cm gs.,.,,, 2. 5 (1. 285cm gs), 3. 0(1. 542cm gs) [33 ].,, 10, 000aBP 106
: ( ).,,. 10, 000aBP, 30m,,,,,, 060m,.,,,.,, ( 3060m ). 6 6. 1, ( ).. 6. 2,, 2, 000aBP, 4, 000aBP, 7, 0005, 000aBP, 10, 0008, 5000aBP. 6. 3,,.,,. 6. 410, 000aBP,,,,,. 6. 5,,. :,. 1.., 1997, 15 ( ) : 5156 2,,.., 1997, 52 ( ) : 161169 3,,.., 1979, 2: 114 4,.. :, 1992. 817 5,.., 1987, 9 (2) : 209215 6,..., 1993. 142147 7,,.., 1983, 5 (1) : 6270 8.., 1985, 5 (3) : 3543 9,.., 1981, 12 (4) : 321333 10.. :, 1986. 122134 11,. M 2., 1984, 2 (1) : 17 12.., 1991, 11 (3) : 105112 13,,.., 1995, 17 (1) : 6475 14,,.., 1983, 1 (1) : 7479 15,,.., 1993, 15 (6) : 1624 16.., 1991, 11 (2) : 2534 17,.., 1995, 4: 5760 18.., 1985, 5 (4) : 119 19,.., 1978, 9 (1) : 1525 107
() 21 3(1998) 20,.., 1980, 35 (4) : 300310 21.., 1981, 3 (1) : 114131 22.., 1979, 24 (7) : 317320 23.., 1981, 5: 603613 24,. 20, 000., 1984, 15 (1) : 113 25,,..,, 1986, 4352 26.. :, 1986. 1527 27.., :, 1985. 6570 28.. :, 1995 29.. :, 1989. 229258 30,.. (), 1986, 22 (3) : 536544 31,,.., 1984, 2 (2) : 3951 32,.., 1985, 16 (5) : 392399 33,.., 1984, 6 (3) : 361367 34.. :, 1987 D evelop ing Process and M echan ism of Tidal Sand R idges off the Coast of J iangsu Prov ince W a ng J ia n, Lu G uonia n, L in Hui, S ong Zhix ia o, J ia J ia njun AbstractD iscussions have been m ade on the develop ing p rocess, dynam ics, sand source and initiation age of the tidal sand ridges off the coast of J iangsu p rovince, Based on sedim entary facies analysis of 39 bo reho les and sim ulations of tidal2system 2developm ents fo r the last 15, 000 yearṡ T he results show that the m ain dy2 nam ics fo r the developm ent of the sand ridges is the tidal current system w h ich is convergence off Q ianggang and dependence on the location and outline of the coast2line of J iangsu p rovince and the south Shandong peninsula. Initiation tim e of the tidal sand ridges is m uch mo re comp lex than it has been though ṫ In fact, it is the m ixture of various sedim ents in and around the region of the sand ridges w ith the sands they w ere and are being brough t into th is region during the developm ent of the sand ridgeṡ Because of the coastline changes since the initiation of the sand ridges, the tidal current system has been experiencing a series of adjustm ents. T herefo re, the sand ridges m ust have experienced a series of distructions, reconstructions and adjustm ents. Sedim entary sequence analysis and tidal2current2system sim ulations give som e evidence to suppo rt tho se changes during the past 10, 000 yearṡ T he sand expo sure region betw een 30 and 60 m dep th in southern Yel2 low Sea has been though t to be the result of ero sion by ocean currentṡ But the ocean currents in southern Yellow Sea are too w eak to erode the seabed. How ever, the tidal currents of southern Yellow Sea are strong e2 nough to do thaṫ Furthermo re, the sand expo sure regions in southern Yellow Sea m atch w ell w ith the distri2 bution regions of the sand ridges in 10, 0008, 500 years BP and surround the modern sand ridgeṡ T here2 fo re, the sand expo sure of southern Yellow Sea is the result of ero sion by tidal current, no t by ocean current Keywordscoast of J iangsu P rovince, sand ridge, develop ing p rocess,m echanism Author s address Co llege of Geograph ical Sciences,N anjing N o rm al U niversity, 210097,N anjing, PRC; D epartm ent of Geography, Ch inese U niversity of Hong Kong; D epartm ent of H ydro logy, H ehaiu niversity, 210094,N anjing, PRC. 108