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18715236
Geological of Malay Basin
Description
Mind Map on Geological of Malay Basin, created by Nini Faiza on 17/07/2019.
Mind Map by
Nini Faiza
, updated more than 1 year ago
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Nini Faiza
almost 5 years ago
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Resource summary
Geological of Malay Basin
Tectonic evolution
1. Form from dextral shear deformation caused by the indentation of India into Eurasia in the early Tertiary.
2. Pre-existing basement inhomogeneities exerted a strong control on basin development.
3. Developed as isolated grabens and half-grabens at basement fault intersections.
4. The major structures that played important role.
low-angle listric normal faults
pull-apart rhomb grabens
flower structures
crustal extension
strike-slip tectonics
5. Developed by transtension of NW-trending sinistral shear zone
Fault-bounded blocks rotate producing a series of E-trending half-graben depocentres.
6. Subjected to transpressive inversion during the middle-late Miocene
Rotation of the regional stress field occurred
6. Uplift of the basin flanks preceeded subsidence during the rifting
Non-uniform stretching and lateral heat flow from the centre of the basin produced.
7. Undercompensated isostatically and characterised by low negative free-air gravity anomaly.
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