Seismic Sequence Stratigraphy of Tertiary Sediments, Offshore Sarawak Deep-Water Area: ABSTRACT

Mohammad, Abdul Manaf

doi:10.1306/a25fe80b-171b-11d7-8645000102c1865d

Bulletin

1994

DOI: 10.1306/a25fe80b-171b-11d7-8645000102c1865d

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Seismic Sequence Stratigraphy of Tertiary Sediments, Offshore Sarawak Deep-Water Area: ABSTRACT

Abdul Manaf Mohammad¹

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2020

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A preliminary study on morphology and genesis of giant and mega pockmarks near Andu Seamount, Nansha Region (South China Sea)

et al. 2020

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Pockmarks consists of depressions on the seafloor and are often considered to originate from fluid escape activities. In this study, we report 125 pockmarks near the Andu Seamount in the southern margin of the South China Sea (SCS) and preliminarily investigate their genesis based on multi-beam bathymetry and multichannel seismic reflection data. Most of them are giant and mega pockmarks and display circular, elliptical, elongated, crescent, comet and irregular shapes on a plan-view. The mapped pockmarks cover a total surface of 291.354 km 2 . Most of them occur in strings or clusters, while some are isolated. The filled volume of pockmark is calculated for the first time in this region, which may have significant implications for sedimentary process. Beneath most of the pockmarks, high-angle faults, high-amplitude reflections, filled-up structures and other fluid escape features are imaged on seismic sections. The structural settings, especially the fault systems, may control the genesis and development of pockmarks in this area. We also speculate that seabed gradients may contribute to generation of crescent pockmarks. According to seismic sections, sediment types and morphological analysis, we finally proposed that the genesis of these pockmarks may mainly be triggered by gas escape activities in the study area. This work may have important implications for the gas exploration in the Nansha Region, southern South China Sea.

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A preliminary study on morphology and genesis of giant and mega pockmarks near Andu Seamount, Nansha Region (South China Sea)

et al. 2020

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Seismic Sequence Stratigraphy of Tertiary Sediments, Offshore Sarawak Deep-Water Area: ABSTRACT

Cited by 1 publication

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A preliminary study on morphology and genesis of giant and mega pockmarks near Andu Seamount, Nansha Region (South China Sea)

A preliminary study on morphology and genesis of giant and mega pockmarks near Andu Seamount, Nansha Region (South China Sea)

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