Stratigraphic evolution of Oligocene–Miocene carbonates and siliciclastics, East Java basin, Indonesia

During the Miocene, extensive carbonate deposition thrived over wide latitudinal ranges in SoutheastAsia despite perturbations of the global climate and thermohaline circulation that affected the Asian continent. nevertheless, the mechanisms of its emergence, adaptability in siliciclastic-dominated margins and demise, especially in southern South china Sea (ScS), are largely speculative and remains enigmatic along with a scarcity of constraints on paleoclimatic and palaeoceanographic conditions. Here we show, through newly acquired high-resolution geophysical data and accurate stratigraphic records based on strontium isotopic dating, the evolution of these platforms from ~15.5-9.5 Ma is initially tied to tectonics and eustasy, and ultimately, after ~9.5 Ma, to changes in the global climate patterns and consequent palaeoceanographic conditions. our results demonstrate at least two paleodeltas that provided favourable substratum of elevated sand bars, which conditioning the emergence of the buildups that inadvertently mirrored the underlying strata. We show unprecedented evidences for ocean current fluctuations linked to the intensification of the Asian summer monsoon winds resulting in the formation of drifts and moats, which extirpated the platforms through sediment removal and starvation. this work highlights the imperative role of palaeoceanography in creating favourable niches for reefal development that can be applicable to carbonate platforms elsewhere.A gargantuan modification of the planetary climate system and the thermohaline circulation patterns occurred in the Cenozoic with the inflection point being diffused from exceptionally critical tectonic processes that affected Asia 1,2 . At ca. 24 Ma, in close proximity to the Oligocene-Miocene boundary, the continent experienced a transformation of climatic processes from a latitudinal zonal circulation pattern to a monsoon-dominated configuration along with the evanescing of an extensively prevalent subtropical-aridity across Asia and the inception of aridity that was exclusively restricted to the hinterland of eastern Asia 3 . The Asian continent experienced a dynamic climate transition that was instigated by the Paleocene-Eocene collision of the Indian Plate with Asia and the resulting progressive uplift of the Tibetan Plateau (TP). This caused an array of feedbacks that significantly strengthened monsoon-inducing atmospheric circulation with each of its major orogenic pulses 4 (i.e., at (i) ca. and (iii) ca. 15-10 Ma [refer to Fig. 1 for (ii) and (iii)]). Over a span of ~30 Ma, the stepwise exhumation of the TP governed an accelerated amplification of firstly, the Indian Summer Monsoon (ISM) and the Somali Jet with the initial pulse of uplift; secondly, the Southeast Asian Monsoon, the East Asian Summer Monsoon (EASM) and the East Asian Winter Monsoon (EAWM) with 40% uplift of the TP; and lastly, the further intensification of the EASM and EAWM with 80% uplift of the TP 5,6 (Fig. 1). This last uplift

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“…23,24 ) and in the early Late Oligocene in parts of Java and Sumatra (e.g. 25 ) and the Philippines (e.g. 26 ).…”

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confidence: 99%

The emergence of Miocene reefs in South China Sea and its resilient adaptability under varying eustatic, climatic and oceanographic conditions

Mathew

Makhankova

Menier

et al. 2020

Sci Rep

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“…and Tertiary-Pliocene (!). The Ngimbang-Kujung PS is actively being pursued in the Madura and East Java basins, targeting the Kujung and CD carbonate reservoirs (Essam Sharaf et al, 2005). Further to the east, large offshore gas discoveries have been made in the late synrift section (e.g.…”

Section: Petroleum Systemsmentioning

confidence: 99%

Petroleum systems of Indonesia

Doust

Noble²

2008

Marine and Petroleum Geology

107

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“…Grötsch and Mercadier (1999) proposed an integrated 3-D reservoir model of the Tertiary Malampaya and Camago buildups, offshore Palawan, Philippines, based on 3-D seismic data. Sharaf et al (2005) studied the stratigraphic evolution of Oligocene-Miocene carbonates and siliciclastics of the East Java Basin, Indonesia, from seismic and logging data. Based on regional 2-D seismic data and well data, previous studies have investigated the sequence, development, and controlling factors of the reef and carbonate platform in the Maldives archipelago Droxler, 1992, 1996;Woodroffe, 1992;Purdy and Bertram, 1993;Droxler, 2003, 2004a,b;Mörner, 2004;Mörner et al, 2004;Mörner and Tooley, 2005;Kench et al, 2005aKench et al, ,b, 2006Mörner and Tooley, 2005;Woodworth, 2005).…”

Section: Introductionmentioning

confidence: 99%

Seismic characteristics and development of the Xisha carbonate platforms, northern margin of the South China Sea

Fuliang³

et al. 2011

Journal of Asian Earth Sciences

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Stratigraphic evolution of Oligocene–Miocene carbonates and siliciclastics, East Java basin, Indonesia

Abstract: Toni Simo received his M.S. degree and his Ph.D. from the University of Barcelona. His research focuses on carbonate sedimentology, sequence stratigraphy, and basin analysis.

Cited by 31 publications

References 23 publications

The emergence of Miocene reefs in South China Sea and its resilient adaptability under varying eustatic, climatic and oceanographic conditions

The emergence of Miocene reefs in South China Sea and its resilient adaptability under varying eustatic, climatic and oceanographic conditions

Petroleum systems of Indonesia

Seismic characteristics and development of the Xisha carbonate platforms, northern margin of the South China Sea

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