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Contrasting thermal histories for the Indian passive margins during syn- and post-Gondwana break-up: Insights from apatite fission-track thermochronology
Fonseca, A.; Glorie, S.; He, Z.; Singh, T.; De Grave, J. (2022). Contrasting thermal histories for the Indian passive margins during syn- and post-Gondwana break-up: Insights from apatite fission-track thermochronology. Terra nova (Print) 34(6): 543-553. https://dx.doi.org/10.1111/ter.12621
In: Terra Nova. Blackwell: Oxford. ISSN 0954-4879; e-ISSN 1365-3121, meer
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| Auteurs | | Top |
- Fonseca, A., meer
- Glorie, S.
- He, Z., meer
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- Singh, T.
- De Grave, J., meer
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| Abstract |
New and published apatite fission-track data provides evidence for differential exhumation between the eastern and western passive margins of southern India. The eastern margin records significant Late Jurassic to Early Cretaceous rifting-triggered exhumation in response to Gondwana break-up and minor Cenozoic cooling. In contrast, Meso–Cenozoic rifting and posterior tectonic events did not deeply exhume the basement of the western margin. The anomalous thick crust of the Western Dharwar Craton might explain why Mesozoic deformation in this area was subdued. In addition, the Cenozoic eastward tilting of the Indian plate and the onset of Bengal Fan sedimentation ca. 23 Ma allowed the accumulation of thick sedimentary sequences in the eastern coastal basins, probably inducing a flexural response of fault reactivation on the eastern margin. More generally, we demonstrate the influence of lithospheric strength and post-rifting sedimentation to the exhumation history of passive margins. |
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