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T iii M t)C nguyen v ii M { ji KJIHGFEDCBA tr u ir n g b ie n T ( lp /1 / - ZYXWVUTSRQ /9 L t)C T n g L (~ i n o i d a u D ac d ie m v in h B ac th a i h in h D ia C hu H in h th a i B ach Long T am S O n , D illh tra m va T am Ve d ie m L li I l T r a il D L lC dai vung b ie n yen T h ( llllz dao 27 m oi G ia n g D in li L tin , D in li tra m tru o n g - Cau nguon cung V a ll tic h H uy, Due h ie n N guyhi T lu ] lz lz , dai de cap th e m cn« N guyen dam tu a « , Q U W lf ( H (;i pha 36 H - C au G ia n g van D in h H uy, va H su phan Lan, D illiz cu« ta n H i, tra m T r a il N guyen tic h b ie n Due T I z ( I I lI z , Q uang h ie n dai tu a « (~ p h a (H u e ) 45 N guyen T n V illl h ie n tic h N g u y e ll C ac T N ( [ I l, 16 T r a il day tic h so T r a il D ac tra m Vy tr a « tro n g Q uang ~N g u y e n Thanh h in h d ia Hoi B ac v in h N guyen soi h < '1 c u o i , WVUTSRQPO day h in h phan Bo N f ( u y e ll va ky D ~ tro n g Tu () V ie t N am Q uang (p h a n T w ill lu c 55 d ja ) N guyen V trie u tro cua khu k ie n V \jC ta o yen h ie n h ie n dai tro n g su h in h D tl S o n -H o n g Hoan, th a n h N guyen dat V6 phong hoa tre n dao B ach Long N g u y e ll uot 68 D in li H oe 80 Vy DUe ngap G N g u y e ll Y N goc cu N guyen nau 01 337 M i ZYXWVUTSRQPONMLKJIHGFEDCBA t r u i r n g h ie'n T (ip II/ - vutsrqponmlkjihg /996 T iii n g u yen va THAI DIA HINH ZYXWVUTSRQPONMLKJIHGFEDCBA v A TRAM TicH Hlt::N D~I VUNG HINH VEN DAO B~CH LONG vi T riin D in h t.a « ; D in h N g u y in Dao Bach Long Q uang T u fin , T riin D u :« T h a n h , N g u y ln Vi narn c) trung BIEN V a ll H u y, C hu H O i tarn vinh Bac BO co toa d¢ dja ly tit 20°07'35" den 20°08'38" B, 107°42'20" den 107°44'15" D vdi d ie n tich p h a n ndi la 2,5 km2; phan chiu anh huong trieu va day bien den d¢ sau 5m la khoang 4,2km2 De co co sd cho viec nghien CUll d;)c diem hinh thai, quy bci tu - xoi It) phuc vu cho quan Iy va bao v~ dao lien quem su dung Iy tai nguyen, bao ve moi truong phuc vu phat trien kinh te xa hoi huong IflU ben, nhung net co ban ve dia hinh va tram tich hien dai bien yen dao se duoc trinh bay bai viet luat hop then vung Nguon 10/1995 Uti lieu Phan can su dung 'My chu yeu tit hai dt;1t khao vien Hai Duong sat thang hoc tai Hai Phong cac ban do, hai xufit bantheo 7/1993 thuc hien va thang Ngoai cac narn cua Vi~t Nam va cac an pharn dft xu at ban c6 lien quan Cac p h u o n g phap k h a o sat bien then quy p h a m n g h ie n c u u bien 1981 del d u o c a p d u n g v o i viec s u d u n g c a c th ie t b ] d jn h vi v e tinh, s a u h o i am, Ia n ngarn v o i th ie t b ] SCUBA Phuong phap phan tich C(1 hoc, khoang v~t tuan theo quy pharn tren Phan i'c;~i tram tich then U~ itzin [3] va I -D~C DIEM DJA HiNH Oc10 B a c h Long Vi narn khoang 60m tr e n m ot k hu nang giua hai d u o n g d5ng sau 30m va cao c6 d ie n tich chirng 1500 km2 chiern khoang J/l () dien tich day Vinh Bac B() pharn vi hep hon, dao narn mot bang d5ng th u o c d s a u 30-40m, d ie n tieh k h o a n g 500 km2, g6c doc khoang 5' Tit dO sau 25m tri dip bach va ph at trien Hai Duong Hiu hen" Luu tai Phan vien H9C tai Hai Phong Lisitzin A.P., 1986 Principles in marine of geological mapping science, No.37 of marine sediments UNESCO report Tran f)(fc Th~nh, 1995 Ranh gioi duoi va dia tang tram tich Holoxen d them B(> Tap chi Cac khoa hoc trai dat s() trang 22-30 luc dia Vinh Bac Trim Van Trj va nnk, 1977 Dia chat Yy dao Bach Long Tap chi Dia chat s() 132, trang 1-11 f>O Thyet va nnk, 1977 Dja chat dao Bach Long Yy, Ve su co matZYXWVUTSRQPONMLKJIHGFEDCBA c u a cac them hien () Bach Long Yy Tap chi Dia chat so 127, trang 15-17 SUMMARY MORPHOLO(;Y AND RECENT SEDIMENTS IN THE SEA AREA AROUND THE BACH LONG VY ISLAND Tran Oinh Lan, Dinh Van Huy, Nguyen Quang Than, Tran Duc Thanh, Nguyen Chu Hoi T h e B a ch L o n g a n d N E -S W T h ere a re B en ch es V.V isla n d - a h ill w ith th e th er [la t to p o f ,5 m h ig h o rien ta tio n -ro se IW O a ccu m u la tive a re fo u n d co ver a n a rea fro m m a rin e fo rm a tio n s d eep terra ces a t -1 m a n d a t -6 m h ig h V y sea b o tto m co n sist o f tw o types o f th e B a ch L o n g ZYXWVUTSRQPONMLKJIHGFEDCBA b o u n d e rs ; o n th e at about 30m -1 m d eep sed im en ts of p la in -4 m in h ill h eig h t a n d a t -2 m in d ep th C o ls su ch a s terrig en o u s sed im en ts co m p o se a sea b o tto m a t litto l a n d a t -5 m a n d -1 m in d ep th T h e stro n g ly steep slo p es a re n o ted a t R ecen t fro m a n d ca rb o n ifero u s p eb b s isla n d and tra vels C a rb o n ifero u s o n es T errig en o u s sed im en ts d erived sed im en ts co ls, m o llu scs fro m th e h a ve co m p o n en ts and ero sio n of of g vels a n d sa n d s o rig in a ted fro m sp a tia l d istrib u tio n o f sed im en ts is reco rd ed o n th e so u th ern p a rt o f th e isla ;ld [r o r a m in ife r s The sea p a ri w ith th e co vera g e h ig h er th a n % O n th e rest, th e sed im en t co vera g e is less th a n % a n d b ed ro ck exp o su re is co m m o n In a d d itio n , ch a n g es o f 35 T a ; n g u y e n v a M i ZYXWVUTSRQPONMLKJIHGFEDCBA t r u i m g b ie n T ~ p III - vutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA 1996 sed im en t so u th e rn d istrib u tio n p a m eters su ch a s M d a n d S o a re a lso stu d ie d co a st tra n sp o rta tio n a l of th e d yn a m ics isla n d in o rd er to co n sid er o n th e d ep o sitio n a l and o f sed im en ts ZYXWVUTSRQPONMLKJIHGFEDCBA * * * D~C DI~M MOl TRlfONG TRAM TICR DAM PHA TAM GIANG D in h ' N g u y ln C h u MO D~I - CAU HAl T riin I HI~N L d n , T il H o i, Due Thanh, N g u y in Q u a n g T u iin DAU Dam pha Tam Giang - C a u Hai (DPTGCH) la mot h¢ tv nhien yen hi) hoan chinh, co nhung d{lc trung rieng ve Itch su hinh thanh, qua trinh phat trien va suy tan Cho den nay, DPTGCH n g h ie n c u u c o b a n c u n g n h u truong diu irng la mot dung quan 19 diem cho nhung la u b e n ta i n g u y e n v a m o i cac thuy vue yen bo Vi¢t Nam Cac dac diem ve dieu kien tu nhien, true he, cac qua trinh dien -he va co anh huong dia chat, vat 19 thuy van, thuy hoa va sinh h9C da va dang sang to nho cac cong trinh nghien cUU gan d a y co su phdi Mot nhung van de co quan h e chat che voi cac qua la moi truong tram tich hien dai ma cac dac trung co ban bay bai viet Nguon dell he nhu duoc dan dan hop da nganh tr inh dam pha se duoc tr inh tai lieu chu y e u cua bai viet dua tren cac s6 lieu khao sat, phan tich, danh gifl cua cac de tai cap nha nuoc "Su d u n g hop 19 cac h¢ sinh thai tieu bieu v u n g bien ven bo Vi¢t Nam" v a "Nghien c u u khai thac va su d\:1I1g hop 19 tiern nang pha Tam Giang" Phan vien Hai Duong H9C tai Hai Phong chu trl giai doan 1990-1996 Ngoai su dung mot so tai lieu da cong h o [1 12] Phuong phap nghien cuu tram tich bien hien dai baa gorn thu thap mau vat, phan tich va xu 19 so lieu ve co hoc tram tich, khoang vat, dja hoa moi truong dua thee quy pharn dieu tra nghien cuu 36 ... DIEM TRAM Tic" Tram "le N DAI tich hien dai duoc khao sat pharn vi cho den sau 20m vdi hai phan trieu va day bien ven dao c6 nhung tv dac trung muc trieu tram cao nhjit tich rie ng: ddi Tram... report Tran f)(fc Th~nh, 1995 Ranh gioi duoi va dia tang tram tich Holoxen d them B(> Tap chi Cac khoa hoc trai dat s() trang 22-30 luc dia Vinh Bac Trim Van Trj va nnk, 1977 Dia chat Yy dao Bach Long. .. s6 di)c trung tram tich vung bien ven d~io Bach Long Gavels Md Vung tri~u lay va nam Cat Ion-cat , Khu vue I Vy So Md Sk Irung . r -! So Sk iI 1,36-2,721 1,6-2,1 0,4-0,9 0 ,35 1-0,795