1.2.1 /ӏFKVӱSKiWWULӇQEӗQWUNJQJ&ӱX/RQJ
BӗQWUNJQJ&ӱX/RQJOjPӝt bӗn rift nӝi lөc. NhӳQJÿһFÿLӇm cҩXWU~FYjÿӏa tҫng trҫPWtFKÿm[iFQKұQFiFJLDLÿRҥn tiӃQKyDFӫa bӗQQyOLrQTXDQYӟLFiFFKӃ ÿӝ ÿӏD ÿӝng lӵF NKiF QKDX /ӏch sӱ SKiW WULӇQ ÿӏa chҩt cӫa bӗQ WUNJQJ &ӱu Long trong mӕLOLrQTXDQYӟi lӏch sӱ kiӃn tҥo khu vӵFFyWKӇ chia ra 03 thӡi kǤ FKtQKQKѭ VDX WUѭӟc tҥR ULIW KuQK WKjQK QrQ KuQK WKiL Fӫa bӅ mһW PyQJ ÿӗng tҥR ULIW KuQK WKjQKFiFFҩu tҥRYjGҥng bүy chӭa, tҫng chҳQÿӗng thӡLOjSKDOҳQJÿӑng trҫPWtFK YjFK{QYLFKtQKFӫa bӗQWUNJQJTXiWUuQKQj\Wӯ (RFHQÿӃn Oligocen; sau tҥo rift xҧy ra tӯ Miocen sӟPÿӃQQD\ÿk\OjTXiWUuQKEuQKәn kiӃn tҥRYjÿiPҽ WUѭӣng WKjQKYjVLQKGҫXÿӇ GLFѭWtFKWө WURQJFiFEүy chӭa.
Luұn YăQWKҥFVƭ HVTH: Vy BҧR7UkP
MSHV: 1570281
+uQK1.1 9͓WUtÿ͓DOêE͛QWUNJQJ&͵X/RQJ
a. Thӡi kǤ WUѭӟc tҥo rift: ljJLDLÿRҥn cӕ kӃWPyQJWUѭӟc Kainozoi cӫa bӗn
WUNJQJOLrQTXDQYӟi sӵ hӝi tө cӫDFiFOөFÿӏDYjRFXӕL0H]R]RLPjSKDWjQGѭFӫa FK~QJNpRGjLWӟi Eocen. Sӵ hӝi tө cӫa hai lөFÿӏa Ҩn-ềFYjặX-ẩÿmQkQJWRjQEӝ thӅP6XQGDOrQFDRYjOjPWLrXELӃQKRjQWRjQÿҥLGѭѫQJ7HWK\Vӣ Ĉ{QJ1DPÈӢ
9,ʃ71$0 LÀO
CAMPUCHIA THÁI LAN
%ɿ3+Ò.+È1+
%,ɿ1ĈÐ1*
HOÀNG SA
75Ɉ͜1*6$
Luұn YăQWKҥFVƭ HVTH: Vy BҧR7UkP
MSHV: 1570281 ÿk\Kҫu hӃWSKiWWULӇn mҥQKFiFGҧLPDJPD[kPQKұSYjSKXQWUjRFyWXәi tӯ Jura ÿӃQ(RFHQ&iFWUNJQJWjQGѭFӫa thӡi kǤ Mezozoi hoһFOjFiFWKXQJONJQJKҽp, hoһc OjFiFKӗ Qѭӟc mһn bӏ NK{Fҥn. HoҥWÿӝng mҥnh mӁ cӫDPDJPD[kP nhұSYjSKXQ WUjR NKX Yӵc xung quanh bӗQ WUNJQJ &ӱX /RQJ ÿL NqP YӟL FiF FKX\ӇQ ÿӝng khӕi tҧng, kiӃn tҥo do sӵ va chҥm cӫDFiFPҧng lөFÿӏDÿmKuQKWKjQKKjQJORҥWÿӭWJm\
OjPSKkQFҳt, phӭc tҥp bӅ mһt cә ÿӏDKuQKFXӕL0H]R]RLÿҫu Kainozoi. Vӓ lөFÿӏa vӯa ÿѭӧc cӕ kӃt bҳWÿҫu bӏ SKiYӥ WKjQKFiFNKӕLQkQJYjYQJVөWGRWiFKJLmQ BӗQWUNJQJ&ӱX/RQJÿѭӧFKuQKWKjQKWUrQFiFYQJVөt khu vӵc thuӝc thӡi kǤ tiӅn WiFKJLmQ3DOHRFHQ-Eocen. [4] [8]
b. Thӡi kǤ ÿӗng tҥo rift: OjJLDLÿRҥQWiFKJLmQKuQKWKjQKEӗQWtFKWө theo
cҩXWU~FULrQJ[ҧy ra tӯ (RFHQÿӃQ2OLJRFHQ9jRWKӡi kǤ Qj\ÿi\Eӗn bӏ SKkQFҳt bӣLFiFÿӭWJm\OӟQWKjQKFiFNKӕLNpRGjLFyEӅ rӝQJNKiFQKDXVDXÿyEӏ bҿ Jm\
bӣLFiF ÿӭWJm\ QJDQJ ӣ nhӳng khoҧQJFiFKNKiF QKDX WҥRQrQ FiF NKӕL QK{Yj khӕi sөWKuQKWKjQKQKLӅXEiQÿӏDKjRĈyOjÿѫQYӏ cҩXWU~FFѫEҧn cӫa bӗn rift nӝi lөc CӱX/RQJ4XiWUuQKWăQJFѭӡQJFiFKRҥWÿӝQJWiFKJLmQOjPFKREӗn sөWO~Q VkXKѫQ7URQJ JLDLÿRҥQÿҫu, nguӗn cung cҩp vұt liӋu trҫPWtFK tWÿLӅu kiӋQNKt hұu thuұn lӧLÿmWҥRQrQKӗ VkXYӟi sӵ WtFKWө FiFWҫng trҫPWtFKVpWKӗ Gj\WUrQGLӋn rӝng thuӝc tұS'&iFWUҫPWtFKJLjXFiWKѫQWKXӝc tұS&VDXÿyÿiQKGҩXJLDLÿRҥn lҩSÿҫy bӗQULIW9QJWUXQJWkPEӗQWUNJQJFyEӅ Gj\WUҫPWtFKOӟQJk\UDVӵ sөWO~Q trӑng lӵc tҥR UD FiF ÿӭW Jm\ ÿӗng trҫP WtFK Yj NpR [RD\ FiF WUҫP WtFK 2OLJRFHQ Cuӕi Oligocen, phҫn Bҳc cӫa bӗn WUNJQJ do sӵ QpQpSÿӏDSKѭѫQJKRһFÿӏa tҫQJÿm xuҩt hiӋn sӵ nghӏFKÿҧo mӝt sӕ QѫLWҥRQrQPӝt sӕ cҩu tҥo lӗLKuQKKRDYӟi sӵ EjR PzQYiWPӓng mҥnh mӁ cӫa lӟp trҫPWtFKWKXӝc tұp C. TrҫPWtFK(RFHQ±Oligocen WURQJFiFWUNJQJFKtQKFyWKӇ Gj\ÿӃQPWKjQKWҥRWURQJFiFP{LWUѭӡng trҫm WtFKKӗV{QJFKkXWKә. Sӵ kӃWWK~FKRҥWÿӝng cӫa phҫn lӟQFiFÿӭWJm\YjEҩt chӍnh hӧp ӣ QyFWUҫPWtFK2OLJRFHQÿiQKGҩu sӵ kӃWWK~FWKӡi kǤ Qj\ [4] [8]
c. Thӡi kǤ sau tҥo rift: bҳWÿҫu tӯ Miocen sӟPÿӃn nay. Thӡi kǤ Qj\TXi WUuQKWiFKJLmQNӃWWK~FFKӍ FyFiFKRҥWÿӝng yӃu ӟt cӫDFiFÿӭWJm\*LDLÿRҥn biӇn tiӃn khu vӵc bҳWÿҫu xuҩt hiӋQYjELӇn tiӃQYjREӗn Cӱu Long tӯ phҫQĈ{QJ%ҳc, ÿҭ\OLWUҫPWtFKOөFÿӏa vӅ SKtD1DP9jRFuӕi Miocen sӟPFiFWUNJQJWUXQJWkP
Luұn YăQWKҥFVƭ HVTH: Vy BҧR7UkP
MSHV: 1570281 tiӃp tөc sөW O~Q FӝQJ WKrP Vӵ oҵQ Y}QJ GR VөW O~Q WUӑng lӵc cӫD FiF WUҫP WtFK 2OLJRFHQOjPSKҫn lӟn diӋQWtFKEӗn bӏ FKuPVkXGѭӟi mӵFQѭӟc biӇQYjWҫQJVpW Rotalid - tҫng chҳn khu vӵc cӫa bӗQWUNJQJ- ÿѭӧFKuQKWKjQKYjRWKӡLJLDQQj\&iF trҫPWtFK0LRFHQ Gѭӟi phӫ chӡm hҫu hӃWOrQÿӏD KuQK2OLJRFHQ 7Kӡi kǤ Miocen giӳD Oj WKӡi kǤ QkQJ OrQ Fӫa bӗQ WUNJQJ &ӱX /RQJ P{L WUѭӡng biӇn ҧQK KѭӣQJ tW KѫQSKҫQĈ{QJ%ҳc bӗQWUNJQJFKӫ yӃu chӏu ҧQKKѭӣng cӫDFiFÿLӅu kiӋn ven bӡ.
Thӡi kǤ Miocen muӝn, biӇQWUjQQJұSWRjQEӝ bӗQWUNJQJ&ӱX/RQJ&NJQJYjRFXӕi thӡi kǤ Qj\ GR V{QJ 0r .{QJ ÿә YjR EӗQ WUNJQJ &ӱX /RQJ ÿm OjP WKD\ ÿәL P{L WUѭӡng trҫPWtFKQJXӗn cung cҩp vұt liӋu, kiӇXWtFKWө YjFҧ KuQKWKiLFҩXWU~FFӫa bӗn WUNJQJ. Bӗn WUNJng mӣ rӝQJKѫQYӅ SKtD7k\1DPYjRSKtDÿӗng bҵQJFKkXWKә V{QJ 0r .{QJ QJj\ QD\ Yj EӗQ WUNJQJ &ӱX /RQJ WK{QJ Yӟi bӗn WUNJQJ 1DP &{Q 6ѫQ7UҫPWtFKFKkXWKә ÿѭӧFKuQKWKjQKGRV{QJOjFKӫ yӃu. Thӡi kǤ Pliocen±ĈӋ tӭOjJLDLÿRҥQWtFKFӵc kiӃn tҥo mӟi tҥo nrQEuQKÿӗ cҩXWU~FKLӋn tҥi cӫa thӅm lөc ÿӏa ViӋt Nam. BӗQWUNJQJ&ӱX/RQJNK{QJFzQKuQKGiQJFҩXWU~FULrQJPjQyKzD FKXQJYjRFҩXWU~FWRjQWKӅP1JX\rQQKkQOjÿi\ELӇQĈ{QJWLӃp tөc sөWO~QGREӏ cuӕQK~W[XӕQJGѭӟLFXQJÿҧo Luson, mһWNKiFÿҩt liӅn Ĉ{QJ'ѭѫQJÿѭӧFQkQJ FDRFQJYӟi sӵ hoҥWÿӝng cӫDQ~LOӱa basalt kiӅm, do vӓ ÿҥLGѭѫQJҨQĈӝ ÿDQJ ÿҭy lөFÿӏDĈ{QJ'ѭѫQJYj7k\1DPĈ{QJ1DPÈOrQFDR [4] [8]
1.2.2 /ӏFKVӱ QJKLrQFӭXWuPNLӃPWKăPGzGҫXNKt EӗQWUNJQJ&ӱX/RQJ
&ăQFӭ YjRTX\P{Pӕc lӏch sӱ Yj kӃt quҧ WKăPGz, lӏch sӱ WuPNLӃm WKăP GzGҫXNKtӣ bӗQWUNJQJ&ӱu Long ÿѭӧc FKLDOjP04 JLDLÿRҥn:
D*LDLÿRҥQWUѭӟc 1975
Ĉk\OjWKӡi kǤ khҧRViWÿӏa vұWOêNKXYӵFQKѭWӯ, trӑng lӵFYjÿӏa chҩQÿӇ SKkQFKLDFiFO{FKXҭn bӏ FKRF{QJWiFÿҩu thҫXNêKӧSÿӗng dҫXNKt
1ăP 86 1DY\ 2FHDQRJUDSKLF 2IILFH ÿm WLӃQ KjQK NKҧR ViW Wӯ KjQJ NK{QJJҫn khҳSOmQKWKә miӅn Nam.
1ăP7-KDLWjX5XWKYj0DULDFӫa Alpine Geophysiscal Corporation ÿmWLӃQKjQKÿRNPWX\ӃQÿӏa chҩn ӣ SKtD1DPELӇQĈ{QJWURQJÿyFyWX\Ӄn cҳt qua bӗQWUNJQJ Cӱu Long.
Luұn YăQWKҥFVƭ HVTH: Vy BҧR7UkP
MSHV: 1570281 1ăPF{QJW\5D\*HRSK\VLFDO0DQGUHOGmWLӃQKjQKÿRÿӏa vұWOêELӇn bҵQJWjX1.V.Robray I ӣ YQJWKӅm lөFÿӏa miӅn Nam cӫa biӇQĈ{QJYӟi tәng sӕ 3.482 km tuyӃQWURQJÿyFyWX\Ӄn cҳt qua bӗQWUNJQJ Cӱu Long.
7URQJ QăP 86 1DY\ 2FHDQRJUDSKLF FNJQJ WLӃQ KjQK ÿR VRQJ VRQJ 20.000 km tuyӃQÿӏa chҩn bҵQJWjX59(9+XQWӣ vӏQK7KiL/DQYjSKtDNam biӇQĈ{QJWURQJÿyFyWX\Ӄn cҳt qua bӗQWUNJQJ Cӱu Long.
ĈҫXQăPF{QJW\5D\*HRSK\VLFDO0DQGUHOOҥi tiӃQKjQKÿRÿӧt 2 ӣ SKtDNam biӇQĈ{QJYjGӑc bӡ biӇQNPÿҧm bҧo mҥQJOѭӟi cӥ 30 km x 50 km, kӃt hӧp giӳDFiFSKѭѫQJSKiSWӯ, trӑng lӵFYjKjQJNK{QJWURQJÿyFyWX\Ӄn cҳt qua bӗQWUNJQJ Cӱu Long.
1ăP-ÿmÿҩu thҫXWUrQO{WURQJÿyFyO{WKXӝc bӗQWUNJQJ Cӱu /RQJOjYj
NăPF{QJW\0RELOWU~QJWKҫXWUrQO{ÿmWLӃQKjQKNKҧRViWÿӏa vұt Oê FKӫ yӃX Oj ÿӏa chҩn phҧn xҥ Fy Wӯ Yj WUӑng lӵc vӟi khӕL OѭӧQJ Oj NP tuyӃQ9jRFXӕLQăPYjÿҫXQăPF{QJW\0RELOÿmNKRDQJLӃng khoan WuPNLӃPÿҫXWLrQWURQJbӗn WUNJQJ Cӱu Long, BH-1X ӣ phҫQÿӍnh cӫa cҩu tҥo Bҥch Hә. KӃt quҧ thӱ vӍD ÿӕLWѭӧQJFiW NӃW 0LRFHQ Gѭӟi ӣ chiӅX VkX-Pÿm FKRGzQJGҫXF{QJQJKLӋSOѭXOѭӧng dҫXÿҥt 341m3QJj\.Ӄt quҧ ÿmNKҷQJÿӏnh tiӅPQăQJGҫXNKtFӫa bӗQWUNJQJ Cӱu Long. [4]
E*LDLÿRҥn 1975 ± 1979
1ăPF{QJW\ÿӏa vұWOê&**FӫD3KiSNKҧRViWNPWKHRFiF FRQV{QJFӫDÿӗng bҵQJV{QJ&ӱX/RQJYjYQJYHQELӇQ9NJQJ7jX - &{Q6ѫQ.Ӄt quҧ cӫDF{QJWiFNKҧRViWÿӏa chҩQÿm[k\GӵQJÿѭӧFFiFWҫng phҧn xҥ FKtQKWӯ
&/ÿӃQ&/YjNKҷQJÿӏnh sӵ tӗn tҥi cӫa bӗQWUNJQJ Cӱu Long vӟi mӝt mһt cҳt trҫPWtFKĈӋ WDPGj\
1ăPF{QJW\*HFR1DX\WKXQә ÿӏa chҩQ'WUrQO{16, 19, 20, 21 vӟi tәng sӕ NP Yj OjP FKL WLӃW WUrQ Fҩu tҥo Bҥch Hә vӟi mҥQJ Oѭӟi tuyӃQ[Yj[5LrQJYӟLO{F{QJW\'HPLQH[ÿmKӧSÿӗng vӟi Geco khҧRViW 3.221,7 tuyӃQÿӏa chҩn vӟi mҥQJOѭӟL[WUrQO{YjFҩu tҥo Cӱu Long (nay Oj 5ҥQJ Ĉ{QJ &ăQ Fӭ YjR NӃt quҧ minh giҧL WjL OLӋX ÿӏa chҩQ Qj\ 'HPLQH[ ÿm
Luұn YăQWKҥFVƭ HVTH: Vy BҧR7UkP
MSHV: 1570281 khoan 4 giӃQJNKRDQWuPNLӃPWUrQFiFFҩu tҥo triӇn vӑng nhҩW7Uj7kQ-A-1X), 6{QJ%D-B-1X), Cӱu Long (C-;YjĈӗng Nai (15-G-1X). KӃt quҧ NKRDQFiF giӃQJQj\ÿӅu gһSFiFELӇu hiӋn dҫXNKtWURQJFiWNӃt tuәi Miocen sӟPYj2OLJRFHQ QKѭQJGzQJGҫXNK{QJFyêQJKƭDF{QJQJKLӋp. [4]
F*LDLÿRҥQÿӃn 1988
&{QJWiFWuPNLӃPWKăPGzGҫXNKtӣWKӅPOөFÿӏD1DP9LӋW1DPWURQJJLDL ÿRҥQQj\ÿѭӧFWULӇQNKDLUӝQJNKҳSQKѭQJWұSWUXQJFKӫ\ӃXYjRPӝWÿѫQYӏÿyOj
;tQJKLӋSOLrQGRDQK9LHWVRYSHWUR1ăPWjXQJKLrQFӭX32,6.ÿmWLӃQKjQK NKҧRViWNPWX\ӃQÿӏDFKҩQÿLӇPVkXFKXQJWӯYjNPWX\ӃQWUӑQJOӵF .ӃW TXҧ FӫD ÿӧW NKҧR ViW Qj\ ÿm SKkQ FKLD UD ÿѭӧF FiF WұS ÿӏD FKҩQ % (CL4-1, CL4-2), C (CL5-1), D (CL5-2), E (CL5-Yj)&/-;k\GӵQJÿѭӧFPӝWVӕVѫ ÿӗFҩXWҥRGӏWKѭӡQJWӯYjWUӑQJOӵF%RXJXHU
1ăPWjXQJKLrQFӭX,VNDWHOÿmWLӃQKjQKNKҧRViWÿӏDYұWOêYӟLPҥQJ OѭӟL[± 3xNPÿӏDFKҩQ02%-WUӑQJOӵFWӯӣSKҥPYLO{Yj YӟLWәQJVӕNP
1ăP-WjXYLӋQVƭ*DPEXU[HYÿmWLӃQKjQKNKҧRViWNPWX\ӃQ ÿӏDFKҩQÿӇQJKLrQFӭXSKҫQVkXQKҩWFӫDEӗQWUNJQJ &ӱX/RQJ
7URQJWKӡLJLDQQj\;1/'9LHWVRYSHWURÿmNKRDQ0JLӃQJWUrQFiFFҩXWҥR
%ҥFK+әYj5ӗQJ5-1X, BH-3X, BH-4X, BH-;Yj7Ĉ-;WUrQFҩXWҥR7DPĈҧR 7Uӯ7Ĉ-;WҩWFҧJLӃQJFzQOҥLÿӅXSKiWKLӋQYӍDGҫXF{QJQJKLӋSWӯFiFYӍDFiW NӃW0LRFHQGѭӟLYj2OLJRFHQ (BH-4X).
&XӕL JLDL ÿRҥQ - ÿѭӧF ÿiQK GҩX EҵQJ YLӋF 9LHWVRYSHWUR ÿm NKDL WKiFQKӳQJWҩQGҫXWӯÿӕLWѭӧQJNKDLWKiF0LRFHQ2OLJRFHQGѭӟLFӫDPӓ%ҥFK +әYjRQăPYjSKiWKLӋQGҫXWURQJÿiPyQJJUDQLWQӭWQҿYjRWKiQJQăP 1988. [4]
G*LDLÿRҥQÿӃn nay
Ĉk\OjJLDLÿRҥQSKiWWULӇn mҥnh mӁ nhҩWF{QJWiFWuPNLӃPWKăPGzYjNKDL WKiFGҫXNKtӣ bӗQWUNJQJ Cӱu Long. Vӟi sӵ UDÿӡi cӫa LuұWÿҫXWѭQѭӟFQJRjLYj Luұt DҫXNKtKjQJORҥWFiFF{QJW\GҫXQѭӟFQJRjLÿmNêKӧSÿӗQJSKkQFKLDVҧn phҭm hoһFFQJÿҫXWѭYjRFiFO{Pӣ YjFyWULӇn vӑng ӣ bӗQWUNJQJ CӱX/RQJĈӃn
Luұn YăQWKҥFVƭ HVTH: Vy BҧR7UkP
MSHV: 1570281 cuӕLQăPÿmFy09 hӧSÿӗQJWuPNLӃm tKăPGzÿѭӧFNêNӃWWUrQFiFO{-1, 09-2, 09-3, 01&02, 01&02/96, 15-1, 15-2, 16-1, 16-Yj
TriӇQNKDLFiFKӧSÿӗQJGmNêYӅ F{QJWiFNKҧRViWÿӏa vұWOêWKăPGzFiF F{QJW\GҫXNKtÿmNêKӧSÿӗng vӟLFiFF{QJW\Gӏch vө khҧRViWÿӏa chҩQFyQKLӅu kinh nghiӋPWUrQWKӃ giӟLQKѭ&***HFR-Prakla, Western Geophysical Company, PGS v.v. Hҫu hӃWFiFO{WURQJbӗQWUNJQJ ÿmÿѭӧc khҧRVDWÿӏa chҩn tӍ mӍ NK{QJFKӍ phөc vө FKRF{QJWiFWKăPGzPjFҧ FKRF{QJWiFFKtQK[iFP{KuQKYӍa chӭa. Khӕi Oѭӧng khҧRViWÿӏa chҩQWURQJJLDLÿRҥQQj\ 'OjNPYj'Ojkm2. KhҧRViWÿӏa chҩQ'ÿѭӧc tiӃQKjQKWUrQKҫu hӃWFiFGLӋQWtFKFyWULӇn vӑQJYjWUrQ tҩt cҧ FiFYQJPӓ ÿmSKiWKLӋn.
7URQJOƭQKYӵc xӱ OêWjLOLӋXÿӏa chҩQ'FyQKӳng tiӃn bӝ U}UӋWNKLiSGөng TX\WUuQK[ӱ OêGӏch chuyӇn thӡLJLDQYjÿӝ VkXWUѭӟc cӝng (PSTM, PSDM).
&KRÿӃn hӃWQăPWәng sӕ giӃQJNKRDQWKăPGzWKҭPOѭӧQJYjNKDLWKiF ÿm NKRDQ ӣ bӗQ WUNJQJ Cӱu Long khoҧng 300 giӃQJ WURQJ ÿy ULrQJ 9LHWVRYSHWUR chiӃPWUrQ.
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