CHARACTERIZATION OF THE PLEISTOCENE FLUVIAL SYSTEM IN SEPAT FIELD, MALAY BASIN USING SEISMIC ATTRIBUTES ANALYSIS

This study is focusing on the characterisation of Pleistocene to present day fluvial system found in Sepat Field in the offshore of Terengganu. It aims to characterise the fluvial system in Sepat Field and correlate the fluvial systems found in Sepat Field with the larger scale fluvial system of the Malay Basin. The methodological approach used for this subsurface study includes geological interpretation of 3-dimensional seismic data and wireline logs interpretation. Frequency spectral decomposition combined with variance and relative acoustic impedance attributes had provided a precise prediction on the dimensions, flow orientation and type of the fluvial systems in this field. This study shows that the fluvial system in this field is dominated by meandering channels that flow from northwest to southeast. Points bars, straight channels, channels boundaries and the evolution of the channels can be imaged and interpreted in this study through frequency spectral decomposition technique. A “hook” shape point bar stands out clearly in the data with depth up to 1.5km and is interpreted to be related to the Malay basin fluvial system. The fluvial system in Sepat Field is interpreted to deposit in the midstream river system and highly associated with the Chao Phraya-Johore River, with sediment sources come through this drainage basin and distributed to the tributaries fluvial channels including those in Sepat Field

Cenozoic tectonic evolution and succession of carbonate growth in development of Luconia-Balingian Provinces, Sarawak, Malaysia.

The Luconia and Balingian basins in Sarawak formed during the Eocene. The area underwent various tectonic deformations including extension and compressio

KANTHAN LIMESTONES

Source: https://youtu.be/0OV0Wbj_oM0?si=fFPFMBv9KZYp5I63 Kinta valley is famous for its limestones formation, which include beautiful white and cream-coloured marble rocks. These limestones formations, formed over millinea, are striking and known for their intricates pattern and textures. The limestone creates karts feature like caves and forms calcite crystals through reprecipitation. The marble extracted from this area is very popular because of its natural beauty and versatility in construction and design

SUEVITE

Source: https://youtu.be/kMfWWeE2zMM?si=WriwolWXLJCVDMA Rock Type: Terrestrial and Metamorphic Rock Age: Quaternary (1.83 million years ago) Origin: Bukit Bunuh, Lenggong, Perak. Suevite is a type of brecciated rock composed of a mixture of materials, including polymic lithic breccia rock, quartzite impacted rock, impacted sedimentary rock impacted granite rock, and quartz or meta quartz impacted rock

PORPHYRITIC GRANITE

Porphyritic Granite originated from Tampin, Negeri Sembilan, a distinctive igneous rock dating back to the Late Triassic (230 - 200 million years ago). It can be characterised by its texture featuring larger crystals known as phenocrysts embedded within a finer-grained matrix called the groundmass. "Porphyritic" refers to the texture of the rock. In porphyritic granite, larger crystals, known as phenocrysts, are embedded within a finer-grained matrix called the groundmass. This contrast in grain size is a defining feature of porphyritic rocks

BIOTITE GRANITE

Arose from Tampin, Negeri Sembilan, biotite granite is an igneous rock characterised by its mineral composition, primarily consisting of quartz, feldspar (including both potassium feldspar and plagioclase feldspar), and biotite (mica). Notably, its geological age can be traced back to the Late Triassic period (230 - 200 million years ago). The distinctive feature of biotite granite is the presence of biotite. Biotite is a dark-coloured mineral that imparts a dark appearance to the rock. The dark colour of biotite, combined with quartz and feldspar, gives biotite granite a mottled or speckled appearance, often with a combination of light and dark minerals. It exhibits a coarse-grained texture, with mineral grains visible to the naked eye. The coarse texture contributes to the durability of the rock. Biotite granite is popular in construction due to its robust nature and aesthetic appeal

SANDSTONE AND SHALE

Source: https://www.youtube.com/watch?v=EZAkc3kElMo This sandstone and shale rock boulder hails from Sabah, a significant constituent of the West Crocker Formation, dated to the Oligocene through the Early Miocine periods (33.9-15.97 millions years ago). It has medium to fine-grain sandstone interbedded with shale. The rock's colouration is predominantly grey, and it has undergone a degree of metamorphism. One of the intriguing aspects of this rock lies in its interpretation as being deposited within a deep- water environment

GRANODIORITE

Source : https://www.youtube.com/watch?v=1hWETNk53DI Middle Miocine - Pliocene (13.82-2.58 million years ago) The granodiorite boulder is visually striking rock composed of minerals like quartz, plagioclase feldspar, biotite, and hornblende. It has a porphyritic structure with larger crystal (phenocryst) within a finer- grained matrix (groundmass), reflecting a complex crystallization process. This rock has fascinating geological history spanning from the Middle Miocene to the Pliocene, approximately 13.82 to 2.58 million years ag

SIMPANG PULAI MARBLE

Source: https://youtu.be/3MiWLSGPdeg?si=dodpriR33QGuQMOv Marble rock in Thematic 4 originates from Simpang Pulai , Kinta valley. These limestones deposit have evolved over millions of years by gradually accumulating marine sediments rich in calcium carbonate. The formation of this marble rock can be traced back to the Devonian period, spanning from approximately 419 million to 359 million years ago, reflecting the intricate natural processes that have shaped the Kinta Valley landscape