Deep marine benthic foraminiferal from temburong formation in labuan island

Bakar, Baharudin; Tahir, Sanudin; Asis, Junaidi

doi:10.26480/esmy.02.2017.17.22

Cited by 6 publications

(4 citation statements)

References 7 publications

(7 reference statements)

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“…The regular presence of the agglutinated foraminifera Glomospira gordialis and Rhabdammina spp., together with the calcareous benthonics Globocassidulina spp., Stilostomella spp., Cibicidioides bradyi and Planulina wuellestorfi , indicate water depths of at least 500 m, based on van Marle (1989). The presence of Spiroplectammina spp., Gyroidina lamarckiana and Karreriella bradyi and others suggests that water depths below about 1,000 m were likely not reached, as these species are absent below 1,000 m. The foraminiferal assemblages therefore indicate a middle bathyal water depth, between 500 and 1,000 m, consistent with water depths estimated by Bakar et al (2017) from benthic foraminiferal assemblages in the Temburong Formation.…”

Section: Resultssupporting

confidence: 86%

A tuffaceous volcaniclastic turbidite bed of Early Miocene age in the Temburong Formation of Labuan, North‐West Borneo and its implications for the Proto‐South China Sea subduction in the Burdigalian

Burley

Breitfeld

Stanbrook

et al. 2021

The Depositional Record

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A 2 m thick bed of smectite‐rich clay within a sequence of distal deep water turbidites and marine mudstones of the Temburong Formation on the island of Labuan, Sabah, North‐West Borneo, is an altered, re‐sedimented pyroclastic tuff which is geochemically of rhyolite‐dacite composition. The tuff bed was deposited in deep water, although probably <1,000 m, by traction currents and retains relic siliceous shards, feldspar phenocrysts and biotite crystals but was dominated by ash‐grade material. The tuff is interpreted as a turbidite deposit and most probably records long distance sub‐marine transport down the depositional slope from an active volcanic system in the hinterland. It has a zircon U–Pb weighted mean age of 19.6 ± 0.1 Ma whilst combined forminiferal and nannofossil ages from the enclosing marine mudstones range from 21.5 to 19.4 Ma; together these indicate an early Miocene age for the Temburong Formation. The tuff is the result of a very short‐lived volcanic arc magmatic episode and was either related to similar aged volcanics of the Sintang Suite in central Borneo or a product of the Proto‐South China Sea subduction beneath the Cagayan arc north‐east of Borneo. The age indicates that deep water sedimentation in North‐West Borneo continued into the Burdigalian suggesting the subduction trench of the Proto‐South China Sea was active into the early Miocene, beneath the depocentre of the Temburong turbidite fan. By contrast, sandstones representative of the typical marine Temburong Formation yield abundant zircons which are dominately Cretaceous in age indicating an important switch in source provenance during the Early Miocene from the Crocker Formation that is dominated by Permian‐Triassic zircons. This difference in zircon populations likely reflects an important tectonic event in the early Miocene that resulted in uplift of central Borneo to supply sediment to the Sabah Trough whilst the input of material derived from the western terrains diminished. The Temburong Formation was sourced by reworking of uplifted Rajang Group, Sapulut or Trusmadi formations.

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Section: Resultssupporting

confidence: 86%

A tuffaceous volcaniclastic turbidite bed of Early Miocene age in the Temburong Formation of Labuan, North‐West Borneo and its implications for the Proto‐South China Sea subduction in the Burdigalian

Burley

Breitfeld

Stanbrook

et al. 2021

The Depositional Record

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“…This formation is believed to be the representative of deep marine low energy environment. (Wilson, 1964;Bakar et al, 2017).…”

Section: Temburong Formationmentioning

confidence: 99%

“…Depositional environment Madon (1997) interpreted the heterolithic clastic units of Temburong Formation exposed in Labuan as deposits of unstable slope and deep marine settings. Recent studies by Bakar et al (2017) on Temburong shales exposed in Labuan area signify that the formation was deposited in deep marine bathyal to abyssal environment. Jasin & Firdaus (2019) currently distinguished that the Temburong Formation exposed in Labuan and Klias areas of West Sabah represents only distal part of submarine fan as it is mudstone dominant (Table 1).…”

Section: Sedimentary Faciesmentioning

confidence: 99%

A contemporary review of sedimentological and stratigraphic framework of the Late Paleogene deep marine sedimentary successions of West Sabah, North-West Borneo

Jamil¹,

Rahman²,

Siddiqui³

et al. 2020

BGSM

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A timely and updated review of the Late Paleogene deep marine sedimentary successions is vital for a better understanding of the historical advances in sedimentology and stratigraphic evolution of West Sabah. The main objective of the study is to discuss the facies characteristics and depositional environment of the Late Paleogene rock formations. In addition, the stratigraphic aspects of the Paleogene interval will also be discussed. The Oligocene Temburong Formation exposed in several localities of West Sabah had been field researched with varying depositional processes and facies analysis. Moreover, the distribution of submarine fan, the observed variety of deep marine sediments associated with various sedimentary processes and the source of sediments of the co-eval West Crocker Formation were also investigated with contorted layers of mass transport deposits (MTD) reported first time in the formation. The upper and lower stratigraphic contacts of Late Paleogene formations, the age of individual rock formations and use of the term "Crocker Formation" in the literature are discussed with numerous unconformities and their stratigraphic positions in the Paleogene interval have been incorporated to understand the historical development of the Paleogene stratigraphy of the West Sabah. Owing to degrading tropical climate of the area, there are limitations and constraints on field-based research where the older outcrops are altered with housing development and dense vegetative cover. This review outlined the scientific developments and highlighted the ambiguities associated with stratigraphic placement of the Temburong and Crocker formations that still needed to be resolved to get an upgraded depiction of the Late Paleogene sediments of West Sabah.

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“…Gao (1980) and Lei (1987) came up with a classification for loess microstructure that achieved good results, which has been used up to today. Many scholars (Zhenghan & Zudian, 1986;Yang, 1988;Miao, 1999;Wang & Gu, 2013Bakar et al, 2017) conducted an in-depth study of the mechanism of collapsible deformation of loess. Chinese studies (Zhang, 1995;Liu, 1997;Ma, 2014;Usman et al, 2017) developed research on engineering properties of loess in China.…”

Section: Introductionmentioning

confidence: 99%

Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China

Wang¹,

Ma²,

Guo³

et al. 2017

Earth sci. res. j.

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More than 40% area of the Xixian New Area is a loess deposit region, and most of the loess landform is tableland and terrace where the thickness of loess is considerable large. Therefore, loess collapsibility will be the most important geotechnical problem in future foundation investigation and construction. To explore loess collapsibility in the Xixian New Area, we conducted the K0 compression test, based on the collapsibility mechanism, which has different combinations of pressure (0~1.2 MPa) and water content (4%~Sat). Based on the σ-ε curve under different water content, we calculated the generalized collapse settlement and collapsibility coefficient of every water content under every pressure by subtracting the relevant curve from the saturated curve and analyzed the cross action of pressure and water on loess compressibility. The results show that the average collapsibility level of the northern Xixian New Area is self-weight collapsible level II, with a lower limit of 14 m. The compressibility of loess is proportional to pressure and water content. Under low water content, the collapsibility coefficient δs increased while the pressure increased, but under medium and high water content, δs will reach a peak with increasing pressure and after that, δs will decrease until its value is close to constant. When under the same pressure, δs decreases when water content increases. If set the additional strain 1.5% as collapse start criterion, then the first collapse pressure Pi will linear proportional to water content. The initial collapse water content wi will increase sharply when pressure raises under low pressure, but wi will reach a constant value of 26% when pressure is more than 200 kPa. This consequence will be meaningful for future geotechnical investigation and design in the Xixian New Area. Para estimar la colapsabilidad en Xixian se realizó el test de compresión (K 0 ), de acuerdo con el mecanismo de colapsabilidad, con diferentes combinaciones de presión (0~1.2 MPa) y contenido de agua (4%~Sat). Basado en la curva σ-ε con diferentes contenidos de agua se calcularon los coeficientes de asentamiento y colapsabilidad a partir de substracción de la curva en condiciones de saturación y analizando los efectos de presión y contenido de agua. Los resultados muestran que el promedio de colapsabilidad por su propio peso para el área de Xixian es de nivel II, con un límite bajo de hasta 14 m. La compresibilidad de loess es proporcional a la presión y al contenido de agua. Con un bajo contenido de agua, el coeficiente de colapsabilidad (δ s ) se incrementó mientras la presión se aumentó; pero, con contenidos medios y altos de agua, el coeficiente de colapsabilidad alcanzó su pico con el incremento de la presión, y luego bajó para prácticamente estabilizarse. Bajo presión constante, la colapsabilidad descendió al aumentar el contenido de agua. Si se asume como criterio inicial de colapso (Pi) una deformación adicional de 1.5%, Pi es linealmente proporcional al contenido de agua. El contenido de agua inicial de co...

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Deep marine benthic foraminiferal from temburong formation in labuan island

Cited by 6 publications

References 7 publications

A tuffaceous volcaniclastic turbidite bed of Early Miocene age in the Temburong Formation of Labuan, North‐West Borneo and its implications for the Proto‐South China Sea subduction in the Burdigalian

A tuffaceous volcaniclastic turbidite bed of Early Miocene age in the Temburong Formation of Labuan, North‐West Borneo and its implications for the Proto‐South China Sea subduction in the Burdigalian

A contemporary review of sedimentological and stratigraphic framework of the Late Paleogene deep marine sedimentary successions of West Sabah, North-West Borneo

Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China

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