Petroleum geochemistry study in a sequence stratigraphic framework in the Simenggaris block, Tarakan basin, East Kalimantan, Indonesia

Subroto, Edy; Muritno, Bambang P.; Sukowitono,; Noeradi, Dardji; Djuhaeni,

doi:10.29118/ipa.673.05.g.159

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The sub-basin is geologically subdivided into the Lati syncline and Rantaupanjang anticline with NNW-SSE fold axes (Suwarna and Hermanto 2007). The sub-basin was formed by extension and subsidence during the Middle-Late Eocene, which created wrench faults and resulted in the appearance of major NW-SE oriented structures (Subroto et al 2005;Sudradjat and Hamdani 2018). Economically important lithologies filled the Berau sub-basin from the Cretaceous Telen and Benggara Formations, followed by shales with tuffs of the Eocene-Oligocene Sembakung Formation, Late Oligocene-Early Miocene carbonate sequences of the Selior and Tabalar Formation, and Plio-Pleistocene fluvio-deltaic and shallow marine deposit of Domaring and Sajau Formation (Krisnabudhi et al 2020).…”

Section: Geological Setting and Sediment Sourcementioning

confidence: 99%

Kalimantan hydroclimate variability since the last glacial period

Hendrizan

Kuhnt

Holbourn

et al. 2022

Int J Earth Sci (Geol Rundsch)

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Changes in convective activity and hydroclimate over Northeastern Kalimantan are key features to understand glacial to interglacial climate evolution in the center of the West Pacific Warm Pool during the Late Pleistocene to Holocene. We use high-resolution X-ray fluorescence (XRF) scanner-derived elemental ratios in sediment Core SO217-18522 (1º 24.106’ N, 119º 4.701’E, 975 m water depth) recovered from the northern Makassar Strait to reconstruct changes in precipitation-related weathering and erosion over Northeastern Kalimantan over the last 50 kyr. Enhanced seasonality of rainfall and an extended dry season during Heinrich Stadials (HS4 to HS1) and the Younger Dryas (YD) suggest weakening of the tropical convection associated with a southward shift of the tropical rain belt and the annual mean position of the Intertropical Tropical Convection Zone. Increasing sediment discharge and intensification of convective activity occurred during the early to mid-Holocene during an interval of high Northern Hemisphere insolation, elevated atmospheric pCO2 levels and global warming. Our reconstructions in comparison with regional terrestrial and marine records highlight the high spatial variability of Kalimantan hydroclimate on millennial to glacial-interglacial timescales.

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Section: Geological Setting and Sediment Sourcementioning

confidence: 99%

Kalimantan hydroclimate variability since the last glacial period

Hendrizan

Kuhnt

Holbourn

et al. 2022

Int J Earth Sci (Geol Rundsch)

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show abstract

“…Tipe kerogen secara umum Vitrinite reflectance adalah indikator kematangan yang dilambangkan dengan Ro (Reflectance in oil). Nilai vitrinite reflectance dapat diketahui dari kemampuan kerogen memantulkan cahaya (Subroto, 2018). Metode untuk mengetahui vitrinite reflectance dilakukan dengan cara analisis kerogen.…”

Section: Bahan Dan Metodeunclassified

Analisis Kematangan Batuan Induk Hidrokarbon di Formasi Naintupo, Sub-Cekungan Tarakan, Provinsi Kalimantan Utara

Laksono

Kusdiantoro

Kovács

et al. 2021

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Petroleum geochemistry study in a sequence stratigraphic framework in the Simenggaris block, Tarakan basin, East Kalimantan, Indonesia

Cited by 2 publications

References 6 publications

Kalimantan hydroclimate variability since the last glacial period

Kalimantan hydroclimate variability since the last glacial period

Analisis Kematangan Batuan Induk Hidrokarbon di Formasi Naintupo, Sub-Cekungan Tarakan, Provinsi Kalimantan Utara

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