1887

Abstract

Summary

The evolution and facies distribution of relatively small carbonate platforms, 30 km2, are not well documented, even though they are common in ancient and modern carbonate systems. This study investigates depositional facies and evolution of a Miocene carbonate platform in Central Luconia. An integrated approach including core-described lithofacies, well-log correlation, and seismic analysis, allowed for mapping facies through time. The platform was divided into five stratigraphic zones separated by low porosity intervals. Five depositional facies groups were recognized in core samples: (1) bioclastic wacke-packstone facies deposited in a platform interior, (2) bioclastic packstone facies deposited in backreef environments, (3) coral boundstone facies deposited at the reef margin, (4) interbedded shale and carbonate facies deposited on the slope, and (5) argillaceous carbonate facies deposited across the platform as flooding layers. Six seismic facies were identified and combined with well data to map the five facies groups through time. The platform shows repeated backstepping of facies at flooding layers followed by aggradation of facies belts up to exposure surfaces, resulting in a long-term backstepping of depositional environments until the platform drowned.

© EAGE Publications BV
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2024-11-20
2026-02-15

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/content/papers/10.3997/2214-4609.202477192
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Depositional Model and Platform Architecture of a Middle Miocene Platform in Central Luconia, Offshore Malaysia
Conference Proceedings 2024, 1 (2024); https://doi.org/10.3997/2214-4609.202477192
/content/papers/10.3997/2214-4609.202477192
/content/papers/10.3997/2214-4609.202477192
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