Brunei Darussalam: Geological Link Between Sabah and Sarawak

Hutchison, Charles S.

doi:10.1016/b978-044451998-6/50029-6

Cited by 58 publications

(135 citation statements)

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“…However, the existence of the DRU indicates that major collision between the Dangerous Grounds and Borneo is old and that current motions have not substantially changed a trench system that essentially jammed in the early Miocene [Hutchison, 2005;James, 1984;Levell, 1987;Rangin et al, 1990]. Southwest of the Baram Line there is a thick Cenozoic sedimentary cover overlying the Sunda Shelf (>12 km), as well as the Rajang accretionary complex exposed onshore in Sarawak [Morley et al, 2003].…”

Section: Clift Et Al: Evidence For a Dangerous Grounds Platementioning

confidence: 99%

Seismic reflection evidence for a Dangerous Grounds miniplate: No extrusion origin for the South China Sea

Clift

Lee

Duc³

et al. 2008

Tectonics

173

128

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The collision of India and Asia has caused large strike‐slip faults to form in east Asia, resulting in the “extrusion” of crustal blocks toward the southeast since the Eocene as a result of the indentation of rigid India into Asia. It has been suggested that the South China Sea opened as a result of relative motion between a rigid Indochina (Sundaland) block and China. Alternative models propose that rifting and seafloor spreading were driven by trench forces to the south. We test these competing models by analysis of seismic reflection profiles across the boundary between Sundaland and the southern rifted margin, known as the Dangerous Grounds. We show that the southern boundary of the Dangerous Grounds is a subduction zone that jammed in the middle Miocene. To the west the Dangerous Grounds are bounded by a strike‐slip zone, also active until ∼16 Ma, that becomes diffuse south of the now inactive South China Sea seafloor spreading center. We place the western edge of the Dangerous Grounds just to the east of the Natuna Arch (Lupar Line). The West Baram Line is confirmed as originating as a major strike‐slip fault within the Dangerous Grounds and is continuous with the Red River Fault Zone. Because the Dangerous Grounds were independent of Sundaland until ∼16 Ma, its motion cannot have been constrained by motion of this block, making extrusion impossible as a mechanism to rift the South China Sea. SE motion by both the Dangerous Grounds and Sundaland suggests subduction forces were the primary trigger for plate motions. Our reconstruction places a ∼280 km upper limit on the motion on the Red River Fault and a ∼1400 km width to the paleo–South China Sea.

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Section: Clift Et Al: Evidence For a Dangerous Grounds Platementioning

confidence: 99%

Seismic reflection evidence for a Dangerous Grounds miniplate: No extrusion origin for the South China Sea

Clift

Lee

Duc³

et al. 2008

Tectonics

173

128

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“…Meanwhile, a research, state that the Miri Formation is predominantly arenaceous, with clay and shale. some explanations by him is similar to another researcher, toward the Miri Formation which is this formation was divided into two lithologic units which is Upper and Lower unit [4,2]. The maximum thickness is over 6000 feet, in the Seria Field and range from 1000 to 4000 feet in the Miri Field.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…A new subject related to facies analysis have been recognized and described by a group scientist, based on shallow marine sedimentary structures [5,4,6]. A few sedimentary facies are; through cross bedding, herringbone cross bedding, hummocky-swalley cross bedding, flaser-wavy bedding, lenticular bedding, planar cross bedding and parallel laminated sandstone.…”

Section: Geological Backgroundmentioning

confidence: 99%

Wave-Dominated Shoreline Deposits in the Late Miocene Sedimentary Sequence in the Miri Formation North Sarawak, Malaysia

Ismail¹,

Rahman²,

Tahir³

2017

Geol. behav.

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The research area is located in Miri region, north Sarawak. Observation was focused on selected outcrops along road cuts and beach. The distribution of outcrops is widely distributed at a few localities in Miri region such as Tanjong Lobang, Airport road, Hospital road and Oil Well road. Sedimentary sequences can be traced by facies variations as shoreline environment based on the sedimentary structures. Four facies were identified and characterised successfully in the study area based on their sedimentary structures, namely facies 1: planar cross stratified (PcS), facies 2: swaley cross stratified (ScS), facies 3: swaley-Hummocky cross stratified (SHcS), facies 4: Hummocky cross stratified (HcS) and heterollithic facies (He). Facies evaluation deduced that the sedimentation settings resulted as foreshore, upper shoreface, middle shoreface, lower shoreface and tidal (minor occurrence). Wave-dominated in the upward coarsening interval is unambiguous that representing by abundance of hummocky cross stratification and other storm deposits in the sandstone dominated portions, well-defined swaley cross stratified sandstone interval, and up to several meters thick sets of planar cross beds interval interpreted to have been formed by swash waves. Heterolithic units in this wave dominated sequences are as minor occurrence of tidal influence during fair weather.

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“…This rock unit is part of Rajang Group and aged from Oligocene to Late Miocene [2]. However, Temburong Formation at Beaufort to Tenom was Oligocene to Early Miocene, while in Sapulut it was aged from Paleocene to Eocene [3]. The depositional environment is deep marine environment which is different with Crocker Formation where it is younger and the rock facies is shalier.…”

Section: Geological Background Of Long Pasiamentioning

confidence: 99%

“…Meligan Formation was first introduced which consists of well-cemented thick sandstones bedding with white to grayish color, several cross beddings and grain sizes range from medium coarse to coarse [4]. This formation also consists of chalky conglomerate lenses with chert fragments [3]. Whereas, mudstones and shale were thin and most of them have been eroded and weathered due to its fragile properties.…”

Section: Geological Background Of Long Pasiamentioning

confidence: 99%

Geosite Heritage and Formation Evolution of Maga Waterfall, Long Pasia, South of Sipitang, Sabah

Soehady¹,

Asis²,

Tahir³

et al. 2017

Geol. behav.

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Maga Waterfall is situated in the inland of Long Pasia which is at the south of Sipitang, Sabah. The location of Air Terjun Maga is still less known by the public however, if it is promoted it has the potential to attract local and foreign tourists. An identification survey on the geosite development potential has been done in this area to establish a geological heritage in Sabah. Maga Waterfall has three tiers and streamflow on the rock surface of Meligan Formation. The rock outcrop shows clear primary structures of shallow marine depositional environment of shoreface deposit and secondary structures such as fault and joints which shaped the formation of Maga Waterfall. Apart from that, interesting morphologies made by river erosion are also present. The unique culture of local people and recreational activities could attract more visitors to this geosite. Conservation efforts need to be taken to ensure the sustainability of geotourism development of geological heritage resources in this area.

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Brunei Darussalam: Geological Link Between Sabah and Sarawak

Cited by 58 publications

References 0 publications

Seismic reflection evidence for a Dangerous Grounds miniplate: No extrusion origin for the South China Sea

Seismic reflection evidence for a Dangerous Grounds miniplate: No extrusion origin for the South China Sea

Wave-Dominated Shoreline Deposits in the Late Miocene Sedimentary Sequence in the Miri Formation North Sarawak, Malaysia

Geosite Heritage and Formation Evolution of Maga Waterfall, Long Pasia, South of Sipitang, Sabah

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