CHUaNG vo: TR NH DIEu T A TONG H(JP G BltH THU HAl MINH HAlrqponmlkjihgfedcbaZYXWVUTS cAe BAa cAo KHOA HOC dcbaZYXWVUTSRQPONMLKJIHGFEDC eVA' CHUaNG TRINH DInU TRA Tl)NG HQP VUNG BI~ THU!N 1976 , Ot B IC OA - HA~ MINH HA 1980 HOC vA Itt THU,&T NHk ZYXWVUTSRQPONMLKJIHGFED rw oc HA NOI 19M \ zyxwvutsrqponmlkjihg } COIW BOA XA HOI Dpc 1~1} - CHU HGHIA Tl/ VIET n"-l h - HAM phUc JIHGFEDCBA ~ ~ D!iU DT OHUONG 'r TRINH A TON G HOll VUNG BUN ~HUAN HAl -MINH HAl (1977 - 1960) / I I I-i) QUA THUO C) - ch~n lPo t6t B' ~t bj chia o&t b&t ~ c r&nb DSlm 06 h\l6ll$ t18p 't\lo hOOug ofta o~a song Ph'An dt1.6i o~\13 ohau t:h.~~ d~'ng dlDg il\ 4-5 5t c%3n' hat ranh g16l oh-.mg ofla chill tht> ngh Dlo dlara trte 1~7lg hl14n th'-1 o~a b~ JJ4t pht10 tp,p hern, t11' hj 8:::- tren oM bb d~ phb t!'oh vft li.iu c:lu t,.o nen u6 tht:t&Dg la, lO~itl'drl t{ch hat m~n olt ch6s.· bUn sh, itm fIi't oh~a o~t v~ bUn s$t ·1;61 d~ 8&U - va 0.,10 kDV'kb.2 d~ "chiu th ~ lIgbm hi theng • brig Ji"Ongn&1 phin b t ~ ph! ':e{o: D sang o6"bb ng t:d'u kbOngnhiing c6 t~ d1J.TJg lJ1ang ~t lUu d i t ma oS tfla dv.ng xb to.\10 t"o nen r8.nb sau trlt6c c°r,a SOODg dang h5 o vU '18tr~o Q~ I tr'Ung k'o d8.1 Nhin chung ki\u ell thalli gia c~a eO!l3 lvc lam cho oh~ 06 - Dl)ng b!ng khu ~'o ~Un ? o~ d~a h\nh mo t1 va · bilu, nblt-tlg ' b tren e6 ngu~n g80 b~i tv v61 troPg ~6 d~o di~m c1.\ th~ oua c$.ftDg net rUng bi~t 1 nh~ phb kh~ Dhau• ' mai mUll t10h t1.\ oh1a e&t mlJlh phano "btS~ phin 'bto tilp xG.o ki\u dj.a h-lnh Vlia ma tren b ta wi wi va V\UIg t~u Rallh g1~i trtn 1& tt, o-Ilg bC, bitn hi~n dtli r3Dh gl~l ~l dtt(/c ngan o&oh bOdcbaZYXWVUTSRQPONMLKJIHGFE • cua va • • ohung • C~c ld~u trbln.-!i1ch v~ $1/ vhan b~ cf.t.8 -ChGnS s Vlmg dillu tra Dlm khu V1/0 th~'A l~o (i:~a Tay Bitn - , tro:r;l.g.llhl1ng wng da,dl!'9'o nh1~u tao gla n'J'O'o DP;oa1 quall # • Cit".l (]I.F Sh.,pard, K.O Emery 1964 tau Kyoshln ),faru No 52 H NUno 1971 S.G Gaskov ••• 1974 Hai quan Hoa.kY 1965) • QUa c ~o kgt qua• lighten ca-u tong hQ'p c~a S G Gorskov nh1~u t~ gi~ khtlc ds neu leD IUfJC b~c tranh chung nhat ~ m~ va ngu~n g~c cua tr'lno tlc~ • Do~, la tan:.nghien 1968-1969 cimg nh~ 61/ ph8nb~ va Bi~n DOng n6i chung th'm 1~c d,.a phl~ Tey r 6l rl€ng 'l'heo 6ng tr~m t!ch ~ th~m l\l.c d~a t8;r B:I.~nDOng ph o 11~XL va chUm ttu thg nhat la 10",1 trb.m t!ch o't~ Ch(mg c6 nguen gl'>c Iv-c nguyen (Dh~ hc'n 10% Cacbonat va ,nho ho'n'10% s11io vo dj.~'lh b:r.h) hlnh the.nh mlJt d6i r~ng ral t~ ngo&! khO'1 Nllm bs> Viet ItQm tt'1 a: a CI N at·urn ' r>ta vuo kdt qua dUu tra ohGng t Oi they r~ng tr~'.n ~loh cua • ' v" • • vung dUu tra kha da d~q: c6 ll'.9-t tll tang cho len bun s5t Trong day uu th3 r hat le loai trflm t1ch c &t n!> h1nb than i dai k~o dai ttt 14am mui Ca M xulSng phla Nam, v\IDg ditu tra (kIN; hf/y wi tai li~\\ "Gl.'aO b~,o oflo sO' bP vt tr~m tlch tl\ng '!!lit V'~Dgbi~n Thllan hai - Minh h~i , 1979) ~ ~t nP;o-al :phllm vi vUng dnu tra (k~t "h~p wi tal liilu • thu dtnrs tren tau Bitn Dong tat lUu - cfla H~i quan Hoa 111·6 - kY 1965, ofla •.:Hl.r'3l'd V~ EOAsr.!(1'.164-) Nhl! v~ ch~lJg t~ th~ r~ng, llh~n x~t ph\" n'lP yh llh~nzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ql(5ngi,ui phla b~c wng C!i~u trl' th loei cu,.)i khCl'i C&m ranh) 'Ib'n, 'c~t oJ/a V8.0Id~t qua ph'an t1~h co h~c c6 th~ phan bi~t lo~l c~t o-n - t rung -~i d i"~n h~p o' • vung • va c a t · nno , ~8.'t p h~an -« no vo' c 't· at 'rung o~,Ham ven 60 I c~t TUll nh~ phA.nb(S r~ng VB WQ't r a ngoai rai 'ph~ vi, wng c:!t~u tr a ", Cat • ., hUm lltQ'ng ngu;yen, ••• va~, trul.ig 10'11 DlE,U c arb onab I ã y eu La vƠ-t t.,h~~"" WJ.U ph'tUl chu II( r~'l; th11p du., I" 160 I ,1+3 tt 9·!J •.57 I I c&t ehl1a graven 161 I 162 I 16} I 1641 0.'9 I I 99 •51 100.00 I i Cs't nht> 1.63 54.1? 14.66 I 7~50 I ~ •96 J ,1 I 74.16 I 99 ••51 t 95.71 I 100,00 t 98.37 0.98 I ! 156 I 157 I 158 I It I 1651 166 167 168 169 170 171 172 I I I I I I I ! 0.40 ,.29 17; BD-11 BIl-16 I I 79 ~4-4 -1 1" 95.04 99.02! 45,8} 85.34 92.50 96.04 93 69 28.84 I I t I I I" I IC'toh'~ab~n8h l:eUnDhch~ac"t IB~ndcbaZYXWVUTSRQPONMLKJIHGFEDCB B't II " I" IC~t oh~a bun sh I I Cat nnc• 1" !" 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