Tiến hóa địa chất vùng cửa sông bạch đằng trong holocen 1993

BQ gfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA G IA o-ovc vA D A o T~O TRuO NG D ~ I HQC T O N G H < ;1 PHA N Q I TRAN Due TH~NH " ,.(' ,.(' TIEN HOA DlA CHAT VUNG CUA SONG B~CH DANG TRONG HOLOXEN (Tom tiit lu~n an phd tien si Dia I Iy - Dia Chuye n nga nh : Dja chat Ma s6 1.06.01 Hit NQi 1993 c h a t) LU~N AN NAY utror: KIIOA D!A N g lJ a i h u n g IIOAN TIIA'-IH T~J LY - f)!A CIIAT TRU(Y~(; D.~l HOC aZYXWVUTSRQPONMLKJIHGFEDCBA d im : DANG DUC NGA, Pho Giao sir - Ph6 Tien SI Khoa hoc dia chat _ Khoang vat nh?n :gfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA xet ", ',' T in h c a p th ie t cua lu ~ n a n Vung cira song (yCS) Bach Dhng co mot vi tri d~c biet quan trong M thong kinh te' xli hQi mien Duyen hai phia b~c Vi~t Nam va la m(>t vung hoat d(>ngkinh te'soi dong tren nhieu linh Vl!-Ckhai thac bi~n Day cung la noi c6 nhieu van de cap bach d~t ve khai thac hop 19 tai nguyen va bao v$ moi truong Nhirng ysu cau doi hOiphai co hi~u bie't ro ban chat tl1 nhisn vung cira song Bach Dang, co van de tie'n hoa dia chat Holoxen N ghien cuu tie'n hoa dia chat Holoxen vung cia song Bach Dang, noi co sir tirong tac manh me gnra luc dia va bi~n la huong nghien ciiu mdi d nude ta, co kha nang to Ion gop phan dap iiug nhung doi hoi cua thuc ti~n kh~ thac quan 19 doi bo · ~O~(; 1Ing ciia moi trirong dia chat tuong lai va d'e xuat cac kie'n SI1 dung hop 19 Uti nguyen, bao v~ moi truong vung cira song vl;I eua lu ~ n a n - Phan chia va lam ro ban chat ciia M thong moi trucng tram tfch Holoxen VCS Bach Dh g - Xac dinh cac qua trinh dia dong 111cHoloxen VCS Bach Dang anh hudng den tien hoa dia chat - Xac dinh ban chat cau true ciia VCS Bach Dang N h i~ m N g lJ a i n h ? n xet : va d i~ m m a l cua lu ~ n a n 1- Mci truong tram tich (MTTT) Holoxen vung cira song Bach Dang dia ven bi~n, dai ven bo), duoc phan chia phirc M (dong bang 11,J.c ki~u (ho-dllm Illy, aluvi, chau th6, estuary, V1,J.ng bi~n va vjnh ven bo), phu ki~u (ddi trieu, ddi dudi trfeu, ddi ran san ho) va dang (bai b'6i chau th6 ngap tri'eu, bai tri'eu Illy, bai tri'eu thap, de cat bi~n, bai cat bi~n, delta trfa u xuong, chau th6 ngam, lach tri'eu song va day vinh nho ven bo) 2- Tie'n hoa dia chat vung cia song Bach Dhng Holoxen duoc chia ba thai kY:M5i thai kYMt daU bang qua trinh bi~n tie'n (hoac bi~n ! t in ) , Mt thuc bang' qua trinh biE!nlui Thai ky thu nhat, Holoxen sdm giua (11-3 nghin nam truce) Thai kY thu hai, Holoxen muon (3 de'n 0,5-0,7 nghin nam truce) Thai ky thir ba b~t dau tit cu6i Holoxen muon (0,5-0,7 nghin nam qua) M6i thai kY gom mot sO"giai doan ung vdi cac kiE!umoi truong tram tich nhat dinh, N h lin g lu ~ n d i~ m b a o v ~ Co quan nh?n xet : Luan an se dU