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Mesozoic anomalies in the Bay of Bengal

DRS at CSIR-National Institute of Oceanography

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Title Mesozoic anomalies in the Bay of Bengal
 
Creator Ramana, M.V.
Nair, R.R.
Sarma, K.V.L.N.S.
Ramprasad, T.
Krishna, K.S.
Subrahmanyam, V.
D'Cruz, M.
Subrahmanyam, C.
Paul, J.
Subrahmanyam, A.S.
Sekhar, D.V.C.
 
Subject Geology and Geophysics
Geology and Geophysics
magnetic anomalies
mesozoic
seafloor spreading
ridges
ISW, Bengal
 
Description The analysis of 8200 line km of total magnetic intensity data in the Bay of Bengal, northeastern Indian Ocean, revealed the presence of approximately N30~'E-trending seafloor spreading type magnetic anomalies. These anomalies resemble the Mesozoic anomaly series (M11-M0) reported elsewhere. The oldest anomaly (M11, 132.5 Ma) identified close to the east coast of India is followed by the younger series of Mesozoic anomalies towards the offshore. Some of the anomalies are offset by 60-80 km. The configuration of the offsets of the isochrons allowed us to propose approximately N120~'E-trending oceanic fracture zones. The Mesozoic crust of 132.5-118 Ma is estimated to evolve with an average half-spreading rate of 3.5 cm/yr, except for the ocean floor between the M9 and M4 magnetic isochrons. This part of the crust appears to be affected by the buried subsurface 85~'E Ridge
 
Date 1994-04-12T10:06:26Z
2017-09-30T01:55:44Z
1994-04-12T10:06:26Z
2017-09-30T01:55:44Z
1994
 
Type Journal Article
 
Identifier Earth and Planetary Science Letter, vol.121(3-4); 1994; 469-475
0012-821X
http://drs.nio.org/drs/handle/2264/7396
 
Language en
 
Relation Earth Planet Sc Lett
SCI
 
Publisher Elsevier