Correlation of Early Tertiary rocks across Kalimantan

Pieters, Peter; Trail, Dustin; Supriatna, S.

doi:10.29118/ipa.84.291.306

Cited by 23 publications

(24 citation statements)

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“…Thickness of the formation is quite variable, up to 1,500 metres (Wain and Berod, 1989). The basal portion is composed predominantly of quartzose sandstone and conglomerate (Pieters et al, 1987), which is suggestive of an alluvial fan facies. However, there are also red-purple mudstones and carbonaceous siltstones, with associated thin coal seams (Wain and Berod, 1989); an association that may indicate lacustrine deposits with associated peat mires.…”

Section: Syn-rift Faciesmentioning

confidence: 98%

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A regional review and new insights into SE Asian Cenozoic coal-bearing sediments: Why does Indonesia have such extensive coal deposits?

Friederich

Moore²,

Flores

2016

International Journal of Coal Geology

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Section: Syn-rift Faciesmentioning

confidence: 98%

“…In the Upper Kutai Sub-basin these basal coarse-grained units are conformably overlain by sandstone-bearing units with minor mudstone and thin coal seams (Pieters et al, 1987;Satyana et al, 1999) referred to as the Batu Ayau Formation.…”

Section: Post-rift Transgressive Faciesmentioning

confidence: 99%

A regional review and new insights into SE Asian Cenozoic coal-bearing sediments: Why does Indonesia have such extensive coal deposits?

Friederich

Moore²,

Flores

2016

International Journal of Coal Geology

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“…The Kantu Formation is conformably overlain by a fluvial clastic unit of the Tutoop Formation and a fluvio-marine deposit of the Ketungau Formation (Pieters et al, 1987;Heryanto et al, 1993a&b;Supriyatna et al, 1993).…”

Section: General Geological Settingmentioning

confidence: 99%

“…It is followed by the Silat Shale, regarded to be equivalent to the Ketungau Formation, that was deposited during Oligocene. When the sediment deposition in the Ketungau Basin had terminated, the deposition in the Melawi Basin still occurred where fluvial units of the Payak, Tebidah, and Sekayam Formations were deposited (Pieters et al, 1987, Pieters et al, 1993 …”

Section: General Geological Settingmentioning

confidence: 99%

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The Potential of Ketungau and Silat Shales in Ketungau and Melawi Basins, West Kalimantan: For Oil Shale and Shale Gas Exploration

Santy¹,

Panggabean²

2013

Indonesian J. Geosci.

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The Ketungau and Melawi Basins, in West Kalimantan, are Tertiary intramontane basins of which the potential for economic conventional oil and gas discoveries have not previously been confirmed. The Ketungau Basin is bordered by the Melawi Basin in the south. Besides non-ideal trapping mechanisms, another major problem in these basins is source rock maturation. Nevertheless, both basins are promising to be explored for oil shale and shale gas energy resources. Therefore, the aim of this paper is to give some perspectives on their source rocks, as an input for the evaluation of the potential of unconventional oil and gas. About twenty samples collected from the Ketungau and Melawi Basins were analyzed using pyrolysis and organic petrographic methods. The results show a poor to good quality of source rock potential. The Ketungau shale, which is the main source rock in the Ketungau Basin, is dominated by type III, immature, and gas prone kerogen. The Silat shale, which is the main source rock in the Melawi Basin, is dominated by type II, immature to early mature, mixed gas, and oil prone kerogen. In the field, Ketungau and Silat Formations have a widespread distribution, and are typically 900 m to 1000 m thick. Both the Ketungau and Silat shales occur within synclinal structures, which have a poor trapping mechanism for conventional oil or gas targets, but are suitable for oil shale and shale gas exploration. This early stage of research clearly shows good potential for the future development of unconventional energy within the Ketungau and Melawi Basins. Keywords

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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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Correlation of Early Tertiary rocks across Kalimantan

Cited by 23 publications

References 0 publications

A regional review and new insights into SE Asian Cenozoic coal-bearing sediments: Why does Indonesia have such extensive coal deposits?

A regional review and new insights into SE Asian Cenozoic coal-bearing sediments: Why does Indonesia have such extensive coal deposits?

The Potential of Ketungau and Silat Shales in Ketungau and Melawi Basins, West Kalimantan: For Oil Shale and Shale Gas Exploration

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

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