200 Panh gia moi nhat vg trien vong tham do dau khi ngoai khoi be S6ngjt6[[g^ DANH GIA MOI NHAT VE TRIEN VONG THAM DO DAU KHI NGOAI KHOI BE SONG HONG Nguyen Manh Huyen, D6 Van Hau, Nguyen Hiru Nam Ngu[.]
200 Panh gia moi nhat vg trien vong tham dau ngoai khoi be S6ngjt6[[g^ DANH GIA MOI N H A T VE TRIEN VONG T H A M DO DAU KHI N G O A I KHOI BE SONG H O N G Nguyen Manh Huyen, D6 Van Hau, Nguyen Hiru Nam Nguyen Anh Son, Nguyen Trgng Liem Cdng ty Ddu tw - Phdt triin Ddu TOM TAT Bdi viet ndy trinh bdy quan diem thdm dd m&i nhdt lien quan den cdc ddi tirgng trien vong vd cdc logi bdy khdc & be Sdng Hdng; cdt kit cdc vdm ki thira hodc udn nep bdn chieu, cdc bdy nghich ddo kiin tgo Oligocen - Miocen, cdc cdu triic diapire cd tudi Miocen mudn - Pliocen, cdc qugt cdt ngdm vd turbidit, bdy dia tdng cdc logi, vd cdc khdi xdy - carbonat Tren ca s& ngudn tdi lieu bd sung, tdi lieu gidi thich lgi dia chdn m&i nhdt vd cdc nghien cim khdc, nen hdng trdm cdu tgo trien vong vd cdu tgo tiem ndng vua qua da dugc nhdn dgng & be Sdng Hdng Trong dd, nhieu cdu tgo trien vgng se Id ddi tugng khoan cho nhirng chien dich khoan sdp tdi Bdi viet cho thdy cdc ddi tugng triin vong kem bdn dd m&i nhdt vi phdn bd cdc cdu tgo trien vong Cd the ndi rdng be trdm tich Sdng Hdng rdng l&n vdn dn chira nhiiu tiem ndngtrlen vong, nhirng tiem tdng ve ddi tugng, phong phii vi the logi, mat thdm dd rdt thdp nen cdn nhieu ca hdi vd ca may cho thdm dd vd phdt hien thuong mgi sdp t&i MO DAU Be tram tich Song H6ng la mgt nhirng bl lan D6ng Nam A va la bl Ion nhat a Viet Nam La be cang gian loai keo tach co huong Tay Bic - D6ng Nam ma hai ria ciia be dugc kh6ng che bang he thing dirt gay thuan trugt bing ngang eo ngu6n g6e tir viec va eham giiia mang An Do va Au - A vao thai ky Eocen Oligocen som Lich sir phat trien dia chat ciia be v6 ciing phirc tap tir thai ky Paleogen den nay: tach gian thai ky Eocen - Oligocen, cang gian va nen ep, nghich dao kien tao, nang len, lim chim nhiet, bao mon cit xen kem theo cac chu ky nang - myc nuoc bien Ket qua la, eiu true va m6i truang trim dgng biin d6i rit manh theo kh6ng gian va thoi gian, biin d6i tir Bic vao Nam, tir dit liln biin, tir mong truac De tam den tram tieh hien dai Vi thi, theo thai gian, quan dilm tham dau ciing can thay d6i de dap irng duge sy phong phu vl thi loai, da dang vl ngu6n goc ciia cac d6i tugng tham Be Song H6ng nam vimg 105"30" - 110°30' kinh tuyin D6ng va 14"30' 2r'00" vT Bae co dang binh hanh voi dien tich khoang 220.000km-, bao g6m mgt dien tich nho dat lien (mien vong Ha Noi) va phan Ion dien tich nam ngoai khoi vinh Bic bg va viing bien mien Trung Viet Nam (Hinh 1) Tram tich lap day co tu6i De tam din hien dai voi day thay d6i tir vai tram den tren 10km Dge theo ria Tay (thuoc dat lien Tuygn tap bao cao Hoi nghj KHCN "30 nam DSu Viet Nam: Co hoi moi, thach thiic mdi" 201 Viet Nam) va D6ng (thuge dit liln dao Hai Nam - Trung Qu6c) ciia bon trung mong 16 thien co tu6i Mesozoi - Paleozoi Vl phia D6ng - Bae la b6n trung L6i Chau Trung Qu6e (Weizou/Beibu Wan basin), phia D6ng - Nam la b6n triing D6ng Nam Hai Nam \a bon trung Hoang Sa, vl phia cyc Nam la b6n tram tich Phu Khanh Be S6ng H6ng rat rong Ion va rat phirc tap vl kien tao ciing nhu dia tang, co the phan ba tinh dia chat nhu sau (Hinh 2) TRUNC OUfiC - - •;f: • ^ ^ '(J Be Sdng H6ng 5i\ ^ , ' ; ' • ' < "'ibi a.^rs?"— •' ^