Last Deglaciation—Holocene Australian-Indonesian Monsoon Rainfall Changes Off Southwest Sumba, Indonesia

Ardi, Ryan Dwi Wahyu; Aswan, Aswan; Maryunani, Khoiril Anwar; Yulianto, Eko; Putra, Purna Sulastya; Nugroho, Septriono Hari; Istiana, Istiana

doi:10.3390/atmos11090932

Cited by 11 publications

(15 citation statements)

References 93 publications

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“…Samples were subdivided into a number of splits using a standard splitter, and ∼300 specimens were picked and counted [29], [30]. The petrographic analysis describes the texture (grain size, sorting, and contacts), sedimentary structures (laminations, bioturbation), and framework grain composition.…”

Section: Nomentioning

confidence: 99%

Characteristics of Carbonate Facies and Depositional Environment of Tapak Formation in the Ajibarang Area, Central Java, Indonesia

Praptisih¹,

Putra²,

Nugroho³

2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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The limestone of Tapak Formation is well exposed in the Ajibarang area and its surroundings, Central Java, Indonesia. Very intensive mining activity is a very serious threat to this limestone. Hitherto, the geological study on this limestone is still very limited. The objective of this study was to investigate the characteristics of these limestone facies and their sedimentation. This research consists of field and laboratory (petrography and micropaleontology) analysis. The results showed that the limestone of the Tapak Formation consisted of three facies: planktonic packstone, algal foraminifera packstone, and foraminifera algal packstone. Planktonic packstone facies are composed of bioclastic fragments in a micro matrix. The fragments were dominated by planktonic foraminifera consisting of a genus of Globigerina, Globigerinoides, Globorotalia, and Orbulina. Benthic foraminifera and radiolarians were also identified. Sedimentation from planktonic packstone facies was estimated to occur in the deep marine environment. Algal foraminiferal packstone facies are composed of bioclastic fragments in a micro matrix. Large algae and large foraminifera dominated the fragments. Algae were from the type of red algae, consisting of Lithophyllum, Corallina, and Rhodolite. Foraminiferal algal packstone and algal foraminiferal packstone that were observed in the studied area were characterized by the abundance of large foraminifera and interpreted to be deposited in the upper reef slope. We interpreted that the limestone in the study area was deposited in the upper reef slope to the lower reef slope environments. We hope that the information we provided here is useful for petroleum system study in Central Java, Indonesia.

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Section: Nomentioning

confidence: 99%

Characteristics of Carbonate Facies and Depositional Environment of Tapak Formation in the Ajibarang Area, Central Java, Indonesia

Praptisih¹,

Putra²,

Nugroho³

2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…Several downcore studies have been carried out in the Indonesian waters (Figure 1), which is that, MD98-2162 (Visser et al, 2003), MD98-2170 (Stott et al, 2004), MD98-2165 (Levi et al, 2007), MD01-2378 (Xu et al, 2008), MD01-2390 (Steinke et al, 2008), SO139-74 KL (Lückge et al, 2009), GeoB 10038-4, GeoB 10029-4 (Mohtadi et al, 2010), 13GGC (Linsley et al, 2010), SHI9034 (Ding et al, 2013), MD10-3339 (Gustiantini et al, 2015), GEOB10043-3 (Setiawan et al, 2015), SO184-10043 (Li et al, 2016), BS-36 (Zuraida et al, 2017), BS-24 (Li et al, 2018), ST-13 (Damanik et al, 2019), STA3 (Hendrizan et al, 2019), OS-07 (Damanik et al, 2020a, b), and ST-08 (Ardi et al, 2019(Ardi et al, , 2020. However, only a few studies have identified the abundance and diversity of vertical planktonic foraminifera distribution to determine the marine ecological conditions (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Gustiantini et al, 2015;Ardi et al, 2019;Hendrizan et al, 2019;Damanik et al, 2019;Damanik et al, 2020b;Ardi et al, 2020). A downcore study have also been conducted in Simeulue sub-basin, such as Li et al (2018) who reconstructed the spatiotemporal pattern of sea surface temperature (SST) (Visser et al, 2003), MD98-2170 (Stott et al, 2004), MD98-2165 (Levi et al, 2007) ), MD01-2378 (Xu et al, 2008), MD01-2390 (Steinke et al, 2008), SO139-74 KL (Lückge et al, 2009), GeoB 10038-4, GeoB 10029-4 (Mohtadi et al, 2010), 13GGC (Linsley et al, 2010), SHI9034 (Ding et al, 2013), MD10-3339 (Gustiantini et al, 2015), GEOB10043-3 (Setiawan et al, 2015) , SO184-10043 (Li et al, 2016), BS-36 (Zuraida et al, 2017), BS-24 (Li et al, 2018), ST-13 (Damanik et al, 2019), STA3 (Hendrizan et al, 2019), OS-07 (Damanik et al, 2020a, b), and ST-08 (Ardi et al, 2019(Ardi et al, , 2020. Sediment location of Core EW17-09 (red star) (modified from Lückge et al, 2009;Mohtadi et al, 2010;Li et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…These foraminifera assemblages reflect the characteristics of warm water mass, low oxygen, and high organic intake. At the same time, Ardi et al (2019Ardi et al ( , 2020 used planktonic foraminifera for a downcore study in Sumba (Figure 1). The relative abundance of thermocline dweller taxa consisted of Neogloboquadrina (N.) dutertrei, Puleniatina (P.) obliquiloculata and Globorotalia (G.) menardii was used in paleoecological studies that focused on thermocline depth parameters.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1: Location of sediment cores discussed in this study (black star): MD98-2162(Visser et al, 2003), MD98-2170(Stott et al, 2004), MD98-2165(Levi et al, 2007) ), MD01-2378(Xu et al, 2008), MD01-2390(Steinke et al, 2008), SO139-74 KL(Lückge et al, 2009), GeoB 10038-4, GeoB 10029-4(Mohtadi et al, 2010), 13GGC(Linsley et al, 2010), SHI9034(Ding et al, 2013), MD10-3339(Gustiantini et al, 2015), GEOB10043-3(Setiawan et al, 2015) , SO184-10043(Li et al, 2016), BS-36(Zuraida et al, 2017), BS-24(Li et al, 2018), ST-13(Damanik et al, 2019), STA3(Hendrizan et al, 2019), OS-07(Damanik et al, 2020a, b), and ST-08(Ardi et al, 2019(Ardi et al, , 2020. Sediment location of Core EW17-09 (red star) (modified fromLückge et al, 2009;Mohtadi et al, 2010;Li et al, 2018).…”

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confidence: 99%

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A Preliminary Study In Vertical Distribution Of Planktonic Foraminifera And Marine Ecological Conditions Of Simeulue Sub-Basin, Aceh, Indonesia

Nugroho¹,

Zaim²,

Yulianto³

et al. 2021

BGSM

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A marine sediment core EW17-09 (03˚ 28’358” latitude and 96˚ 18’788” longitude, 870 m water depth, 390 cm core length) was retrieved from the western Sumatra, Simeulue sub-basin, Indonesia. Simeulue sub-basin are situated in eastern Indian Ocean, western part of Aceh Province, which is one of the outer islands in Indonesia. This sub-basin is influenced by adjacent lands in response to tectonic and climate dynamics. The dynamics of marine ecological conditions in the past is an urgent need for providing an analogy to the changes in the future conditions. In this study, the ecological conditions were examined by identifying the vertical distribution of planktonic foraminifera assemblages. This preliminary study demonstrated the presence of Globigerinoides ruber, Neogloboquadrina dutertrei, Pulleniatina obliquiloculata, Globigerina calida calida, Globigerinoides elongates, Globigerinoides cyclostomus and Globigerinoides sacculiferus in the samples. The assemblages indicate warm water conditions prevailed in the Simeulue sub-basin during the deposition of the samples. However, subtle ecological changes might have occurred in response to the dynamic of thermocline layer. Cluster analysis of planktonic foraminifera abundance and diversity resulted in three groups showing different ecological conditions. Warm water conditions, high salinity, deeper thermocline with moderate sedimentation disturbance prevailed during the deposition of lower part of the core. Oligotropic water conditions with higher temperature, lower salinity, shallower thermocline layer, and moderate sedimentation disturbance predominated during the deposition of the middle part of the core. The paleooceanography conditions of the upper part of the core are comparable to the lower part. Nevertheless, there are a shoaling of the thermocline in the end of the period. These conditions may indicate an increase in upwelling fluctuations and may represent a change in the IOD-like mean state of the Indian Ocean.

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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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Last Deglaciation—Holocene Australian-Indonesian Monsoon Rainfall Changes Off Southwest Sumba, Indonesia

Cited by 11 publications

References 93 publications

Characteristics of Carbonate Facies and Depositional Environment of Tapak Formation in the Ajibarang Area, Central Java, Indonesia

Characteristics of Carbonate Facies and Depositional Environment of Tapak Formation in the Ajibarang Area, Central Java, Indonesia

A Preliminary Study In Vertical Distribution Of Planktonic Foraminifera And Marine Ecological Conditions Of Simeulue Sub-Basin, Aceh, Indonesia

Kalimantan hydroclimate variability since the last glacial period

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