A comprehensive regional basement interpretation of Myanmar
Frogtech Geoscience has generated the first regionally comprehensive interpretation of the 3D depth and topography of basement for Myanmar, providing significant new insights into the distribution, structural style and geometry of its depocentres.
The Myanmar SEEBASE® Lite Study and GIS provides an integrated geophysical and geological study of basement and basin evolution, including a hand-contoured 3D model of the depth and geometry of the basement surface.
This study provides new insights into basin architecture and development, as well as a better definition of the extent of depocentres.
New regional insights that reduce risk and pave the way for new exploration
The Myanmar SEEBASE Lite Study and GIS provides an integrated geophysical and geological study of basement and basin evolution, including a hand contoured 3D model of the depth and geometry of the basement surface.
The study has yielded valuable new insights into the architecture of both basement and basins:
The inherited N-S and NW-SE structural fabric of the West Burma and the Mergui Arc terranes facilitated the development of NS-trending Late Oligocene rifts in a back arc setting. The steep NS-trending faults were reactivated later as dextral transtensional transforms in the Moattama Basin, e.g. the Sagaing Fault and its splays, and controlled the loci and pathways of Miocene and younger depositional systems flowing in from the north.
One of the main NS-oriented faults separating the Mergui Terrace from the Alcock and Sewell rises may have acted as a decollement during Oligo-Miocene rifting, facilitating the formation of ultra-thin crust, unroofing of the mantle and development of interpreted serpentinite in the East Andaman Sea Basin.
The western part of the Burma Central Superbasin is also underpinned by thin crust, and has accommodated the deposition of >10km of sediment during Early Tertiary transtensional events.
Late Tertiary transpressive deformation translated into the basin via basement uplift and thrusts in the Pyay Embayment and Ayerwaddy Basin and shortening and synclinoria elsewhere.
Basement to the Rakhine Basin is interpreted to be highly thinned (hyperextended) to transitional crust originally part of the Indian margin prior to Early Cretaceous break-up. This new interpretation opens up additional potential for Triassic and older source rocks at depth.
Plate reconstructions constrained by tectonostratigraphy also support the formation of potential “source kitchens” during the pre-Triassic in the deep Burma Central Sub-basin.
Hyperextension and mantle serpentinisation in the East Andaman Basin will have affected paleo-heatflow and temperature evolution during basin development, and therefore will have a significant impact on basin modelling results in that area.
comprehensive study deliverables
Included in the Myanmar SEEBASE Lite product is a comprehensive digital (print ready) report and a project ready ArcGIS data package covering:
- Basement Geology: Analysis and description of basement terranes including the limit of oceanic crust, assessment of terrane boundaries, and interpretation of basement composition.
- Tectonostratigraphic History: Plate reconstructions and summary of key tectonic events; implications for basin development; and interpretation of major basement faults.
- SEEBASE Depth-to-Basement Model: 3D geometry and depth of the basement surface highlighting basin depocentres and highs.
- Depth to Moho: 3D geometry and depth of the Moho surface.
- Maps of Sediment, Crustal and Basement Thickness, and Beta Factor: Derivative maps created using the SEEBASE™ and Moho models.
- Inferred Basement Heat Flow: Computation of radiogenic heat production and heat flow, integrating basement geology and architecture, as well as timing and intensity of regional tectonothermal events.
- Potential Field Datasets: Frogtech Geoscience's state-of-the-art geophysical processing and enhancements.
- Detailed referencing: Comprehensive references included.
Integrated, project ready and insightful
The Myanmar SEEBASE Lite Study and GIS is an integrated geophysical and geological study of basement and basin evolution at a regional scale using public domain datasets. The SEEBASE model of the 3D depth and geometry of the basement surface provides the first regional interpretation of the basement in Myanmar and provides significant new insights into the structural style and distribution of depocentres.
The integrated evaluation of the SEEBASE surface and accompanying Moho model defines both the regional crustal architecture and variations in crustal thickness at a much higher resolution than that available from published crustal models. FROGNet™ tailored plate reconstruction models permit the building of alternative geodynamic models for the origin and evolution of the poorly known West Burma Terrane. These centre-piece products along with other deliverables make the Myanmar SEEBASE Lite Study and GIS a cost-effective regional tool that provides the geological context for evaluating the prospectivity of this complex area. It provides a platform for focusing future exploration and data acquisition strategies to reduce risk and underpin an evaluation of petroleum systems.
SEEBASE Myanmar CORE Benefits
A fully integrated, hand-contoured, regional depth-to-basement model, the 3D SEEBASE models depth-to-crystalline basement, and defines the topography of the basins and sub-basin depocentres.
A new regional view of both onshore and offshore Myanmar, highlighting the variations in structural style and response to deformation during this region’s complex history.
The analysis includes interpretation of basement terranes, composition and structures, and highlights the significance of inherited structural fabric on basin evolution, providing the foundation for new play concepts and exploration strategies.
A new, geologically constrained regional heat flow model has been derived from the basement interpretation.
The integrated tectonostratigraphic history, combined with the SEEBASE and its derivative maps, provides the framework necessary to predict the occurrence and distribution of petroleum play elements (e.g. reservoir, source, seal, trap).