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Abstract

Summary

Continental Oceanic Boundary along conjugate passive margins is very important to understand the plate tectonics and reconstruction after breakup of Gondwana Supercontinent. Generally, mapping of COB needs rigorous modelling using different geophysical datasets. The basic criteria for identification of crustal types along such margins is difference in basement morphology associated with geophysical fields and bathymetry, varying from continent to ocean. In this paper, we proposed a novel, effective and enhanced methodology to correlate the geomorphological features of different crustal types using Tilt and Theta parameters of Bouguer Gravity. Correlation between them can be established by determining angles between the gradient directions of Tilt and Theta. Very small angles (∼ 0o) provides direct correlation, however, large angles (∼ 180o) give inverse correlation. Change in correlation from inverse to direct marks the COB location. We tested our new approach for South Atlantic conjugate margins i.e., Eastern Brazilian Margin (EBM) and West African Margin (WAM) regions. COB results along both EBM and WAM conjugate margins shows very good agreement with previous available results from plate reconstruction studies. The major features such as lineaments, ridges and Fractures Zones of both EBM and WAM margins also show a good correlation as outlined by this study.

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/content/papers/10.3997/2214-4609.201701310
2017-06-12
2024-04-19

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701310
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An Enhanced and Effective Technique for Demarcation of Continental — Oceanic Transition - Application for South Atlantic Conjugate Margins
Conference Proceedings 2017, 1 (2017); https://doi.org/10.3997/2214-4609.201701310
/content/papers/10.3997/2214-4609.201701310
/content/papers/10.3997/2214-4609.201701310
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