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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience JGE (Jurnal Geofisika Eksplorasi) Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) OLDI (Oseanologi dan Limnologi di Indonesia) Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan Bulletin of Geology Jurnal Geosaintek
Purna Sulastya Putra, Purna Sulastya
Research Center for Geotechnology Indonesian Institute of Sciences
Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science

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A Reinterpretation of the Baturetno Formation: Stratigraphic Study of the Baturetno Basin, Wonogiri, Central Java Putra, Purna Sulastya; Yulianto, Eko
Indonesian Journal on Geoscience Vol 2, No 3 (2015)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6356.081 KB) | DOI: 10.17014/ijog.2.3.125-137

Abstract

DOI:10.17014/ijog.2.3.125-137This paper focuses on the Quaternary Baturetno Formation. An earlier research concluded that the black clay of the Baturetno Formation formed as a ‘palaeolake’ deposit. The ‘palaeolake’ was interpreted to form due to the shifting course of the Bengawan Solo Purba River in relation to Pliocene tectonic tilting in the southern Java. The stratigraphy of the Baturetno Formation was observed in the western part of the Baturetno Basin, and based on marker beds, the Baturetno Formation was classified into three units: (1) Gravel unit (GR) in the upper part, (2) clay unit (CU) in the middle part, and (3) sand-gravel unit (SG) in the lower part. There are floating gravel fragments of andesite, claystone, coral, and limestone with diameters of up to 10 cm in the clay unit. The particle size of sediment reflects the environment, but the lake deposition occurs under very quiet conditions. The occurrence of these fragments within the clay cannot be explained if the clay was deposited within a lake environment. The occurrence of floating fragments in the black clay of Baturetno Formation can best be explained through mudflow process. The cohesive strength of the mudflow is responsible for the ability of large fragments to float within the mud matrix. In general, the Baturetno Formation is inferred to be an alluvial fan deposit. The presence of sand, gravel, and mud are characteristics of alluvial fan deposits.
Subsurface Sediment Distribution in The Sumba Waters, East Nusa Tenggara Putra, Purna Sulastya; Nugroho, Septriono Hari
Oseanologi dan Limnologi di Indonesia Vol 2, No 3 (2017)
Publisher : Oseanologi dan Limnologi di Indonesia

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Abstract

Marine geological survey of the Ekspedisi Widya Nusantara 2016 was conducted in the Sumba Waters on 4 to 26 August 2016 using  Baruna Jaya VIII research vessel. The aim of this survey was to reveal the type and characteristics of the subsurface sediments of the Sumba Waters. A total of 13 samples were taken from the different depth in the subsurface bottom of the sea using grabbing methode with box corer. Grain size analysis were conducted using Mastersizer 2000 to understand the characteristics and the sediment type distribution. In general, the type of the subsurface sediment in the Sumba Waters is ranging from medium to very coarse sandy silt. Distribution of the subsurface sediments is correlated to depths. Grain size of the sediments in the Sumba Strait is coarser than in the western and southern of Sumba Island that directly connected to the Indian Ocean. Distribution of the subsurface sediment showing that the sediment, which are distributed further away from the coast is poorly sorted. The deposition of the subsurface-sea sediment is interpreted to represent a calm, and slow sedimentation mechanism under uniform suspension process.
Re-Interpretasi Formasi Kerek Di Daerah Klantung, Kendal, Berdasarkan Data Stratigrafi dan Foraminifera Putra, Purna Sulastya; Praptisih, Praptisih
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Rock unit crops out surrounding the Cipluk oil field is part of the Kerek Formation according to the regional geological map, however, the stratigraphy, depositional environment and relative age of the rock unit is not clearly recognised. Detailed stratigraphic and micropaleontological studies have been done in the rock unit surrounding the Cipluk of  oil field. The results show that the rock outcrops in the study area are composed by a repetition of marl intercalated by sandstones,identified as turbiditic facies part of a channel portion of supra fan lobe to outer fan that deposited in an upper bathyal. Based on planktonic foraminifera content, the relative age of rockunit is Pliocene to Late Pleistocene. According to the litological characteristics and relative age data, the rock unit in studied area seems to be not part of the Kerek Formation, but it belongs to part of the Kalibeng Formation. The result of this study is very important for updating the surface geological data in which will be very useful to understand the new petroleum system in this area. Keywords: Kerek Formation, Cipluk oil field, turbidite, Kalibeng Formation
Distribusi Foraminifera Bentonik Hidup dalam Hubungannya dengan Sedimen Dasar Laut di Selat Sumba, Nusa Tenggara Timur Putra, Purna Sulastya; Hari Nugroho, Septriono
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.92 KB) | DOI: 10.33332/jgsm.geologi.20.1.17-26

Abstract

Marine geological survey of Ekspedisi Widya Nusantara (EWIN) LIPI 2016 was conducted by using RV Baruna Jaya VIII in the Sumba Waters from 4 to 26 August 2016. One of the aim of this survey is to understand the sea floor surface sediment characteristics and its influence to the benthic foraminifera distribution. Seven sediment samples were collected from sea floor surface in Sumba Strait, at the different location and depth using grabbing method with box corer. The samples have analyzed for the foraminifera content, sediment grain size, organic matter and carbonate content, and chemical element by XRF method. The living benthic foraminifera distribution increase to the east of the research area, which have higher content of the organic material and Fe, Rb, Zr, Zn and Sr elements in the sediment. The benthic foraminifera distribution most abundance founded at the depth of 800-1000 m with sediment types are sandy coarse silt  to sandy very coarse silt.Keywords: Benthic foraminifera, distribution, sea floor sediment, Sumba Strait. DOI: 10.33332/jgsm.2019.v20.1.17-26
Characteristics of Grain Size Distribution on Beaches Sediment of Sumba Island, Nusa Tenggara Timur Based on Grainsize and Geochemical Data Nugroho, Septriono Hari; Putra, Purna Sulastya
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.673 KB) | DOI: 10.33332/jgsm.geologi.20.3.153-164

Abstract

Study of beaches sediment characteristics were conducted on three beaches on Sumba Island, East Nusa Tenggara.The research is a part of Widya Nusantara Expedition which conducted by using Research Vessel of Baruna Jaya VIII. The aim of this study is to determine the characteristics of coastal deposits through the observation of grain size by using the grain size trend analysis approach (Grain Size Trend Analysis, commonly abbreviated as GSTA) and geochemical analysis. A total of 36 samples were taken on each coast representing high tide, transition and low tide along the coast. A grain size analysis was performed using a Malvern Mastersizer 2000 that was processed with Gradistat 4.0 software. Geochemical analysis was carried out using X-ray fluorescence spectrometry (XRF). The distribution of beach sediments is dominated by moderate sand - coarse sand and differences on content of geochemical elements (Ca, Sr, Fe, K, and Ti). The coastal conditions that are connected to the Indian Ocean (B1) have different characteristics from the beach that connected to the Sumba strait (B5 and B7). GSTA analysis showed sediment of Laboya Beach finer than sediment on Waikelo and Melolo Beach. Geochemical elements on Laboya Beach indicates different values than others. It indicates there are differences in the provenance and composition of sediment on the all three beaches. The supply of coastal deposits on these three beaches is influenced by the mechanism of precipitation of the walls and the processes of waves and rivers.Keywords: distribution, sediment, grainsize, geochemical, XRF, beach sediment.
ANALISIS INPUT SEDIMEN SEJAK PLEISTOSEN AKHIR DI PERAIRAN UTARA PAPUA, SAMUDRA PASIFIK Damanik, Adrianus; Maryunani, Khoiril Anwar; Nugroho, Septriono Hari; Putra, Purna Sulastya
JURNAL GEOLOGI KELAUTAN Vol 19, No 1 (2021)
Publisher : Pusat Penelitian dan Pengembangan Geologi Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/jgk.19.1.2021.663

Abstract

Perairan Indonesia, salah satunya Perairan Utara Papua, memiliki peran penting dalam sirkulasi global, yaitu sebagai salah satu pintu masuk Arlindo yang mengalir dari Samudra Pasifik menuju Samudra Hindia. Rekonstruksi perubahan input sedimen sejak ~19 ribu tahun lalu dilakukan pada sampel sedimen laut dalam (OS-07) sepanjang 246 cm yang diambil dari kedalaman 4327 m di Perairan Utara Papua, Samudra Pasifik. Sampel diambil pada Ekspedisi Nusa Manggala 2018 dengan menggunakan penginti gravitasi pada Kapal Riset Baruna Jaya VIII. Rekonstruksi input sedimen dilakukan berdasarkan data kandungan unsur kimia Fe, Ti, dan Rb dan normalisasi unsur darat terhadap unsur laut. Input sedimentasi yang tinggi ditunjukkan pada Plesitosen Akhir (~19.5-16 ribu tahun BP) yang kemudian menurun pada pada ~12.5-10 ribu tahun BP yang diinterpretasikan berkaitan dengan peristiwa Younger Dryas. Pada Kala Holosen, input sedimen yang tinggi ditunjukkan pada ~8-5 ribu tahun BP dan ~2-0,5 ribu tahun BP, dan input sedimen yang rendah pada ~11-8 ribu tahun BP dan ~5-2 ribu tahun BP.
REKAM INTI SEDIMEN GUNA PREDIKSI PERUBAHAN LINGKUNGAN DI DELTA KALIGARANG, PROVINSI JAWA TENGAH Astriandhita, Karina Melias; Winantris, .; Muljana, Budi; Putra, Purna Sulastya; Praptisih, .
Bulletin of Scientific Contribution Vol 15, No 3 (2017): Bulletin of Scientific Contribution:GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (378.296 KB) | DOI: 10.24198/bsc.v15i3.15104

Abstract

ABSTRACTDetailed 20 meters core sampling of sediment was carried out from the recent deltaic Kaligarang, northern part Semarang, Central Java. The main objective of this research is to predict environment changes according to some parameters sedimentation process, for example grain size, organic and inorganic content and the occurrence of benthic foraminifera. The core was analyzed by destructive techniques. The sediment record indicated that the silt grain size dominance deposited in littoral to inner shelf with high organic content than inorganic. Keywords: Kaligarang Delta, grain size, organic content, foraminifera ABSTRAK20 meter rekaman vertikal inti sedimen resen dari Delta Kaligarang, Semarang Utara, Jawa Tengah. Objek penelitian ini untuk memprediksi perubahan lingkungan saat sedimen terendapkan berdasarkan dari parameter besar butir, material organik dan inorganik, dan foraminifera bentik. Inti batuan dianalisis dengan teknik dekstruktif. Hasil penelitian menunjukan bahwa karakter sedimen memiliki dominansi lanau yang terendapkan pada lingkungan litoral-paparan dalam disertai kandungan material organik lebih tinggi dibandingkan inorganik. Kata kunci: Delta Kaligarang, besar butir, material organik, foraminifera
BIOSTRATIGRAFI DAN PALEOEKOLOGI WILAYAH LEPAS PANTAI BARAT DAYA SUMBA SEJAK PLEISTOSEN AKHIR BERDASARKAN KUMPULAN FORAMINIFERA PLANKTONIK Ardi, Ryan Dwi Wahyu; Maryunani, Khoiril Anwar; Yulianto, Eko; Putra, Purna Sulastya; Nugroho, Septriono Hari
Bulletin of Geology Vol 3 No 2 (2019): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2019.3.2.3

Abstract

Foraminifera are microfaunas/microfossils that frequently applied in geology especially for biostratigraphy and paleoecological analysis. This research aim to create biozonation and paleoecological analysis in the region off the southwest coast of Sumba based on planktonic foraminiferal assemblages. This region heavily affected by northwest monsoon – southeast monsoon shift and located next to one of the ITF’s outflow paths (Ombai Strait – Savu Sea) which eventually form its ecological condition. A 235 cm long deep sea sediment core coded ST08 will be used as research material. Foraminifera specimens were determined quantitatively by observing approximately 300 specimens for each split. Each taxon determined from that part then calculated for each individu that was found while different taxa determined from other splits are considered to be one. Biozonation was determined based on either Blow biozonation or Bolli and Saunders biozonation. One zone was obtained based on Blow biozonation which is N23 zone, equal to Pleistocene – Holocene. Two zones were determined based on Bolli and Saunders biozonation which are Globigerinella calida – Clavarotella bermudezi zone (below 147 cm depth), equal to Late Pleistocene and Globorotalia fimbriata zone (0 – 147 cm depth), equal to Holocene. Paleocological analysis focused on the thermocline depth parameter inferred from the relative abundance of thermocline dweller taxa that consist of Neogloboquadrina dutertrei, Puleniatina obliqueloculata, and Globorotalia menardii. Themocline dweller abundance were relatively higher during Pleistocene (49,76 – 75,66%, average 60,01%), indicating shallower thermocline (eutropic condition) while during Holocene its abundance relatively lower (33,90 – 57, 17%, average 45,77%), which indicated thermocline deepening (more oligotropic condition). Those conditions were related to the southeast monsoon domination during Pleistocene (stronger ITF) before its weakening on Holocene which induced northwest monsoon strengthening (weaker ITF).
REKONSTRUKSI PERUBAHAN SUHU PERMUKAAN LAUT BERDASARKAN KUMPULAN FORAMINIFERA DI PERAIRAN UTARA PAPUA, SAMUDRA PASIFIK Damanik, Adrianus; Maryunani, Khoiril Anwar; Nugroho, Septriono Hari; Putra, Purna Sulastya
Bulletin of Geology Vol 4 No 1 (2020): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2020.4.1.4

Abstract

Foraminifera merupakan salah satu proksiterbaik yang digunakan untuk mengetahui kondisi paleoekologi seperti penentuan suhu permukaan laut. Suhu permukaan laut menjadi parameter ekologi yang penting untuk membedakan karakteristik oseanografi pada suatu perairan/cekungan. Penelitian ini melakukan rekonstruksi suhu permukaan laut (SPL) di Perairan Utara Papua berdasarkan kumpulan foraminifera planktonik. Pada penelitian ini digunakan sedimen inti dengan kode OS-07yang diambil pada Ekspedisi Nusa Manggala 2018. Wilayah ini dipilih karena merupakan pintu masuk arlindo (arus lintas Indonesia)sebagai bagian dari sirkulasi globals ehingga Perairan Utara Papua dianggap akan merekam kejadian iklim global. Metoda yang digunakan adalah Modern Analogue Technique (MAT) dan pengelompokan foraminifera di Pasifik mengikuti Parker (1960)dalam Boltovskoy dan Wright (1976). Hasil analisis suhu menggunakan kedua metoda tersebut menunjukkan polaperubahan yang sama. Pada interval kedalaman 246-88 cm dominasi foraminifera zona tropik rendah sedangkan pada kelompok foraminifera subtropik, transitional, dan subantartik mengalami peningkatan yang diinterpretasikan kondisi suhu yang relatif lebih rendah. Foraminifera pada interval kedalaman 88-0 cm mengalamipeningkatan dan terdapat dominasi kelompok foraminifera tropik yang diinterpretasikan adanya kondisi suhu yang relatif lebih tinggi. Hal ini juga selaras dengan hasil rekonstruksi SPL berdasarkan MAT dari data kumpulan foraminifera yang menunjukkan adanya dua pola SPL yaitu pada kedalaman 246-88cm dan 84-0 cm. Peralihan kedua pola, interval kedalaman 86 cm, diinterpretasikan sebagai batas perubahan dari Pleistosen ke Holosen. Perbedaan suhu pada rata-rata untuk bulan Februari pada Pleistosen adalah 1,33oC lebih dingin dibandingkan pada Holosen dan perbedaan suhu pada bulan Agustus adalah 0,82oC lebih dingin pada Pleistosen dibandingkan pada Holosen. Kata kunci: Foraminifera, SPL, MAT, Samudra Pasifik
ANALISIS PERUBAHAN SUHU PERMUKAAN LAUT DAN IDENTIFIKASI UPWELLING BERDASARKAN FORAMINIFERA PLANKTONIK SEJAK AKHIR LAST GLACIAL MAXIMUM DI WILAYAH PERAIRAN PULAU SIMEULUE, ACEH Puteri, Winda Eka Mandiri; MARYUNANI, KHOIRIL ANWAR; PUTRA, PURNA SULASTYA; NUGROHO, SEPTRIONO HARI
Bulletin of Geology Vol 5 No 2 (2021): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2021.5.2.7

Abstract

Analisis perubahan iklim dan lautan di wilayah perairan Pulau Simeulue Aceh sejak Pleistosen Akhir hingga Resen dilakukan karena daerah ini berada di wilayah tropis Samudra Hindia yang memiliki peran dalam dinamika iklim global. Wilayah perairan barat Sumatra terletak di timur Samudra Hindia yang dipengaruhi oleh variabilitas atmosfer dan lautan sepanjang tahun. Penelitian ini dilakukan untuk mengetahui perubahan suhu permukaan laut (SPL) dan mengidentifikasi upwelling dengan menggunakan proksi foraminifera. Penelitian dilakukan dengan menggunakan sampel inti sedimen EW17-08 sepanjang 217 cm yang diambil dari kedalaman 2.811 m di perairan barat Pulau Simeulue Aceh pada posisi94° 46’ 43” BT dan 2° 29’ 47” LU. Berdasarkan hasil pentarikhan AMSC-14 umur inti sedimen laut dalam EW17-08 pada interval kedalaman 216-217 cm adalah 21.300 BP (Plesitosen Akhir).Berdasarkan hasil analisis SPL menggunakan metode Modern Analogue Technique (MAT), rata-rata SPL pada Pleistosen Akhir adalah 27.78oC dan pada Holosen rata-rata SPL adalah 28.15oC. Berdasarkan SPL dan foraminifera kelompok tropis-subtropis terdapat 4 (empat) periode variasi iklim sejak ~21.300 BP. Perbedaan SPL pada Pleistosen Akhir-Holosen di daerah penelitian tidak terlalu signifikan namun terjadi beberapa kali penurunan SPL secara cepat yang kemungkinan berkaitan dengan peristiwa perubahan iklim di bumi yang terjadi sejak Last Glacial Maximum (LGM)seperti deglasiasi, Oldest Dryas, Bølling Interstadial, Older Dryas, Allerød Interstadial, Younger Dryas, Preboreal-Boreal, 8.2k event, Holocene Thermal Maximum, 4.2k event, Subboreal, dan Little Ice Age. Intensitas upwelling di daerah penelitian menunjukan peningkatan pada Pleistosen Akhir yaitu pada kedalaman 100-160 cm berdasarkan kelimpahan Globigerina bulloides dan foraminifera lainnya. Intensitas upwelling diperkirakan dipengaruhi oleh peningkatan intensitas muson tenggara. Kata Kunci: foraminifera, SPL, upwelling, perairan Pulau Simeulue Aceh, Samudra Hindia
Co-Authors A.A. Ketut Agung Cahyawan W Ardi, Ryan Dwi Wahyu Astriandhita, Karina Melias Aswan Aswan Budi Muljana Damanik, Adrianus EKO YULIANTO Hari Nugroho, Septriono Maryunani, Khoiril Anwar Nurhidayah, Efrilia Mahdilah Pamungkas, Ageng Digdya Garin Praptisih Praptisih Praptisih, . Puteri, Winda Eka Mandiri Septriono Hari Nugroho Winantris Winantris