The Nature Of The Mangkalihat Terrane - Ne Borneo Indonesia

Guritno, Elly; Muller, Wayne; Drajat, Deden; Purnama, Meirince

doi:10.29118/ipa.0.12.g.197

Cited by 2 publications

(3 citation statements)

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“…In the northwest margin of the basin is the Mangkalihat Peninsula area (Figure 3), where Wilson et al (1999) and Wilson and Evans ( 2002) studied the carbonate outcrops in great detail. Satyana and Biantoro (1995), Guritno and Chambers (1999) and Guritno et al (2012) included subsurface data in this area and provide additional perspectives on the Paleogene section of the northern area of Kutai Basin.…”

Section: Regional Geologymentioning

confidence: 99%

“…The (Witkamp, 1927;M.G. Rutten, 1948;Albrecht, 1946), work by the Geological Survey (Harting, 1925(Harting, , 1930Ubaghs, 1937) Weerd and Armin (1992), Saller and Vijaya (2002), Bachtiar et al (2013) in the southwest, Wilson et al (1999Wilson et al ( , 2002, Guritno et al (1999Guritno et al ( , 2012, and Moss et al ( , 1999 in the northwest of the basin (Figure 3). Generally, the outcrops in this area are relatively weathered and many parts are covered by vegetation and the logistic to reach this area is very challenging.…”

Section: Introductionmentioning

confidence: 99%

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Paleogene paleogeographic reconstructions of the Kutai Basin: Refinement based on outcrop and subsurface data

Darman¹

2023

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The Kutai Basin is a Cenozoic sedimentary basin located in the eastern part of Borneo Island. Many studies were done on the eastern part of the basin, which is dominated by Neogene sediments. The west margin of the basin is outcropped onshore and to the east, the basin opens up to the Makassar Strait. Paleogene and older rocks outcrop in the west margin of Kutai Basin. The terrain and the access to the area are difficult and no significant hydrocarbon discovery was made in Paleogene sediments up to now.This study revisited the field works completed in the 1970s by a Shell team, which focused on the Paleogene section of the Kutai Basin. The result was integrated with later studies, and altogether were synthesized into a series of paleogeographic maps. A new set of paleogeographic maps is proposed in this paper, for Middle Eocene, Late Eocene, Early Oligocene, and Late Oligocene levels. The works included in this study comprised outcrop observations, biostratigraphy analysis of the samples and limited seismic in parts of the area. The results were integrated with other more recent work to build the new set of Paleogene paleogeographic maps.Outcrops data and well information show the distribution of shallow marine sediment in the Middle Eocene time with some fluvial input from the north and southwest of the basin. In the Late Eocene, some carbonates developed in the north of the basin. During Early Oligocene, the carbonate complex developed both in the south and in the north of the basin. In the Late Oligocene, the carbonate in the south became more stable. Through Paleogene time the center of Kutai Basin was dominated by the bathyal section.

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Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Paleogene paleogeographic reconstructions of the Kutai Basin: Refinement based on outcrop and subsurface data

Darman¹

2023

Bsed

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“…The tectonic history of the Sangkulirang-Mangkalihat karst is inseparable from the formation of the Mangkalihat Peninsula and the Kutai Basin. The Mangkalihat at the beginning of its development was one of the microcontinents from North Gondwana (a supercontinent) that crossed the equator in the Late Triassic to Early Cretaceous period (205-141 Ma) as a result of the widening of the Ceno-Tethys Ocean [21][22][23], which was part of Sundaland in 150-60 Ma. The Sundaland recounts the history of the growth and disintegration of a continent by accretion and dispersion [22].…”

Section: Introductionmentioning

confidence: 99%

Geotourism Hazards and Carrying Capacity in Geosites of Sangkulirang-Mangkalihat Karst, Indonesia

et al. 2022

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The protection of resources and the safety of visitors are two essential elements in the sustainability of any tourism destination. The Sangkulirang-Mangkalihat karst has the potential to be developed as a UNESCO Global Geopark based on the diversity and unique nature of its geological heritage. Proper management efforts should be carefully planned to ensure sustainability of the geosite. Intact natural conditions can be a potential hazard to visitors and, conversely, the presence of visitors can interfere with the natural preservation of the sensitive karst area. Physical, biological, and human activities that may endanger visitors should be identified and limiting the number of visitors received by each geosite should also be considered. This paper aims to identify the potential tourism hazards of physical, biological, and human activities and to calculate the tourist’s carrying capacity of three geosites (Tewet cave, Nyadeng lake, and Bloyot cave) in the Sangkulirang-Mangkalihat karst. The identification of potential hazards was conducted in each geosite and analyzed and assessed using management options referencing UNEP, NPSA, and APEC, whereas the carrying capacity was assessed with reference to the Cifuentes formulation. Meanwhile, the carrying capacity was assessed at three levels, namely physical carrying capacity (PCC), real carrying capacity (RCC), and effective carrying capacity (ECC). The highest physical and biological hazards were the ravines in the Tewet cave, as well as a moderate level of risk, such as slippery, steep terrain and the presence of crocodiles. Meanwhile, the potential hazards faced by Nyadeng lake and Bloyot cave were classified as low risk. The carrying capacity assessments indicated that Bloyot cave is able to accommodate the largest number of visitors on a daily basis. Therefore, the carrying capacity results of each geosite can serve as a reference for managers to limit the number of visitors to the site in order to ensure the sustainability of Sangkulirang-Mangkalihat geosites.

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The Nature Of The Mangkalihat Terrane - Ne Borneo Indonesia

Cited by 2 publications

References 0 publications

Paleogene paleogeographic reconstructions of the Kutai Basin: Refinement based on outcrop and subsurface data

Paleogene paleogeographic reconstructions of the Kutai Basin: Refinement based on outcrop and subsurface data

Geotourism Hazards and Carrying Capacity in Geosites of Sangkulirang-Mangkalihat Karst, Indonesia

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