Imperial College London
Alternate

PETER A. ALLISON

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Earth Science
 
 
 
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Contact

 

+44 (0)20 7594 6479p.a.allison Website

 
 
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Location

 

4.84Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Collins:2017:10.1111/sed.12316,
author = {Collins, D and Johnson, HD and Allison, PA and Guilpain, P and Razak, Damit A},
doi = {10.1111/sed.12316},
journal = {Sedimentology},
pages = {1203--1235},
title = {Coupled ‘storm-flood’ depositional model: application to the Miocene–Modern Baram Delta Province, north-west Borneo},
url = {http://dx.doi.org/10.1111/sed.12316},
volume = {64},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The Miocene to Modern Baram Delta Province is a highly efficient source to sink system that has accumulated 9 to 12 km of coastal-deltaic to shelf sediments over the past 15 Myr. Facies analysis based on ca 1 km of total vertical outcrop stratigraphy, combined with subsurface geology and sedimentary processes in the present-day Baram Delta Province, suggests a ‘storm-flood’ depositional model comprising two distinct periods: (i) fair-weather periods are dominated by alongshore sediment reworking and coastal sand accumulation; and (ii) monsoon-driven storm periods are characterised by increased wave energy and offshore-directed downwelling storm flow that occur simultaneously with peak fluvial discharge caused by storm-precipitation (‘storm-floods’). The modern equivalent environment has the following characteristics: (i) humid-tropical monsoonal climate; (ii) narrow (ca <100 km) and steep (ca 1°), densely vegetated, coastal plain; (iii) deep tropical weathering of a mudstone-dominated hinterland; (iv) multiple independent, small to moderate-sized (102 to 105 km2) drainage basins; (v) predominance of river-mouth bypassing; and (vi) supply-dominated shelf. The ancient, proximal part of this system (the onshore Belait Formation) is dominated by strongly cyclical sandier-upward successions (metre to decametre-scale) comprising (from bottom to top): (i) finely laminated mudstone with millimetre-scale silty laminae; (ii) heterolithic sandstone-mudstone alternations (centimetre to metre-scale); and (iii) sharp-based, swaley cross-stratified sandstone beds and bedsets (metre to decimetre-scale). Gutter casts (decimetre to metre-scale) are widespread, they are filled with swaley cross-stratified sandstone and their long-axes are oriented perpendicular to the palaeo-shoreline. The gutter casts and other associated waning-flow event beds suggest that erosion and deposition was controlled by high-energy, offshore-directed, oscillatory-dominated, s
AU  - Collins,D
AU  - Johnson,HD
AU  - Allison,PA
AU  - Guilpain,P
AU  - Razak,Damit A
DO  - 10.1111/sed.12316
EP  - 1235
PY  - 2017///
SN  - 0037-0746
SP  - 1203
TI  - Coupled ‘storm-flood’ depositional model: application to the Miocene–Modern Baram Delta Province, north-west Borneo
T2  - Sedimentology
UR  - http://dx.doi.org/10.1111/sed.12316
UR  - https://onlinelibrary.wiley.com/doi/full/10.1111/sed.12316
UR  - http://hdl.handle.net/10044/1/38590
VL  - 64
ER  -
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