18715236
Description
Mind Map by Nini Faiza, updated more than 1 year ago
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Created by Nini Faiza
over 5 years ago
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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
- low-angle listric normal faults
- 5. Developed by transtension of NW-trending sinistral shear zone
- Fault-bounded blocks rotate producing a series of E-trending half-graben depocentres.
- 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
- 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.
- 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.
- 1. Form from dextral shear deformation caused by the indentation of India into Eurasia in the early Tertiary.
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