Characteristics of repeated, detached, Miocene–Pliocene tectonic inversion events, in a large delta province on an active margin, Brunei Darussalam, Borneo

Morley, C.K.; Back, Stefan; Rensbergen, P. Van; Crevello, Paul D.; Lambiase, Joseph J.

doi:10.1016/s0191-8141(02)00130-x

Cited by 118 publications

(126 citation statements)

References 16 publications

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“…Parts of the foliated clay-rich core texture are preserved towards the edges of the fault core as wavy foliated-areas. This interpretation is supported by the fact that shale diapirs and pipes are common features in the West Baram Delta province (Sandal, 1996;and Morley et al, 2003), and Sandal (1996) reports injection of clay along faults as well. The overpressures responsible for such features are ascribed to undercompaction of clay units in the Baram Delta region, possibly combined with folding and inversion during the generation of hydrocarbons, particularly the cracking of oil to gas (Morley et al, 2008).…”

Section: The Presence Of a Locally Overpressured Clay Bed Deeper In Tsupporting

confidence: 51%

“…The extension was followed by NW-SE Pliocene compression, which resulted in the reactivation of the Canada Hill Thrust and development of the Miri anticline ( Fig. 1c and d), causing uplift of the landward side of the delta (Tan et al, 1999;Morley et al, 2003;Hutchinson, 2005;Wannier et al, 2011). A strike-slip component of deformation associated with compressional structures has been described by Sandal (1996) for high-angle faults in the Northwest Borneo margin.…”

Section: Geological Settingmentioning

confidence: 99%

“…1b; Tan et al, 1999). Northwest Borneo is characterized by young gravity-related deformation: seaward (NW) and landward (SE) dipping growth faults, mobile shales, and toe thrusts (Morley et al, 2003). The Late Miocene gravitydriven extension is expressed in the Miri Hill structure as a set of listric faults, the most important of which is the Shell Hill fault (offset 750 m; Hutchinson, 2005), and its associated antithetic normal faults.…”

Section: Geological Settingmentioning

confidence: 99%

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Along-strike fault core thickness variations of a fault in poorly lithified sediments, Miri (Malaysia)

Rosa

Shipton

Lunn

et al. 2018

Journal of Structural Geology

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This version is available at https://strathprints.strath.ac.uk/65335/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. The degree to which a fault will impede fluid flow is only as great as its most permeable point. Processes that determine areas of the fault surface containing transmissible fault rocks must be utilized to produce reliable predictions of cross-fault fluid flow. We use a study site in Miri, Malaysia, to investigate in detail the fault-core thickness variations along-strike and down dip, and to quantify the risk of discontinuities in the clay-rich fault core. Four fault-core types have been identified: foliated clay-rich fault core, chaotic clay-rich fault core, anastomosing sandy shear zones and sandy breccia. We performed a geostatistical analysis, showing a correlation over 3 m scale, suggesting the presence of 'patches' of thin and thick fault core generally less than 3 m in length in profile.We interpret this geometry as superimposition of two or more different deformation processes at a smaller and a larger scale. We speculate about the processes that could produce the observed distribution of thickness and composition, and in particular, processes that could have disrupted the through-going clay-rich core.

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Section: The Presence Of a Locally Overpressured Clay Bed Deeper In Tsupporting

confidence: 51%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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Along-strike fault core thickness variations of a fault in poorly lithified sediments, Miri (Malaysia)

Rosa

Shipton

Lunn

et al. 2018

Journal of Structural Geology

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“…A NW-SE maximum horizontal stress orientation in Borneo has long been postulated due to the orientation of geologically recent lineaments and the NW-SE oriented inversion of many major structures (Hamilton, 1979;Hutchinson, 1989;Morley et al, 2003). However, the origin of this NW-SE orientation remains uncertain.…”

Section: Borehole Breakouts and Drilling-induced Fractures From The Bmentioning

confidence: 99%

Present-day stress field of Southeast Asia

et al. 2010

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It is now well established that ridge push forces provide a major control on the plate-scale stress field in most of the Earth's tectonic plates. However, the Sunda plate that comprises much of Southeast Asia is one of only two plates not bounded by a major spreading centre and thus provides an opportunity to evaluate other forces that control the intraplate stress field. The Cenozoic tectonic evolution of the Sunda plate is usually considered to be controlled by escape tectonics associated with India-Eurasia collision. However, the Sunda plate is bounded by a poorly understood and complex range of convergent and strike-slip zones and little is known about the effect of these other plate boundaries on the intraplate stress field in the region. We compile the first extensive stress dataset for Southeast Asia, A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTthe radiating stress patterns arising from the eastern Himalayan syntaxis. However, the present-day maximum horizontal stress is primarily oriented NW-SE in Borneo, a direction that may reflect plate-boundary forces or topographic stresses exerted by the central Borneo highlands. Furthermore, the South and Central Sumatra Basins exhibit a NE-SW maximum horizontal stress direction that is perpendicular to the Indo-Australian subduction front. Hence, the plate-scale stress field in Southeast Asia appears to be controlled by a combination of Himalayan orogeny-related deformation, forces related to subduction (primarily trench suction and collision) and intraplate sources of stress such as topography and basin geometry.

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“…The present-day maximum horizontal stress (S Hmax ) in Borneo is primarily oriented NW-SE [17] (see Figure 3 for details). This NW-SE maximum horizontal stress orientation in Borneo has long been postulated to have been caused by the orientation of geologically recent lineaments and the NW-SE oriented inversion of many major structures [23]. The NW-SE present-day stress direction is similar to the ESE absolute plate motion and thus the stress orientation may result from a combination of multiple plate boundary forces.…”

Section: Regional Geology and Tectonic Settingmentioning

confidence: 92%

Tectonics and Geological Factors Controlling Cleat Development in the Barito Basin, Indonesia

Sapiie

Rifiyanto

2017

J. Eng. Technol. Sci.

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Abstract. Cleats are natural fractures within coal seams. This paper presents the results of regional cleat mapping and characterization in relation to coalbed methane (CBM) exploration and development in the Barito Basin, South Kalimantan, Indonesia involving two major coal layers, namely the Late Eocene Tanjung Formation and Early to Middle Miocene Warukin Formation with thicknesses ranging from 2 to 50 m. The coal is classified as lignite to subbituminous with calorific values ranging from 6000-8000 Cal/gr with ash content 0.68-17.42%. We applied two methods of cleat measurement, i.e. scanline and window sampling using a 100 x 100 cm grid. More than 20,000 cleats were measured from 65 scanline and 37 window sampling locations. The results revealed that face and butt cleats are predominantly oriented in the WNW-ESE and NNE-SSW directions, respectively. The results showed that cleat density increases related to structural position such as fold hinge and fault zone. The formation of the cleats may be influenced by several geological processes, where the cleats, which form during coalification, are superimposed by later processes such as fluid pressure and tectonic stresses and are seemingly also affected by the composition of the coal.

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Characteristics of repeated, detached, Miocene–Pliocene tectonic inversion events, in a large delta province on an active margin, Brunei Darussalam, Borneo

Cited by 118 publications

References 16 publications

Along-strike fault core thickness variations of a fault in poorly lithified sediments, Miri (Malaysia)

Along-strike fault core thickness variations of a fault in poorly lithified sediments, Miri (Malaysia)

Present-day stress field of Southeast Asia

Tectonics and Geological Factors Controlling Cleat Development in the Barito Basin, Indonesia

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