Coal quality is one of the key factors in determining effectiveness processing and utilization. assessment involves analyzing physical chemical aspects to determine its characteristics. also influenced by geological conditions at mining site, which affect amount carbon coal. To ensure consistency, it necessary implement coal control based on parameters from process pit storage stockpile. Analysis effect total moisture ash calorific value purpose this study. The method used a ROM (Run Mine)...

Abstract A regional development requires some analyses in terms of the constraint and potential. Constraints a need to be managed by periodic monitoring, while potentials maintained or optimally improved. The hexa-helix concept is penta-helix with addition role law regulation. Citatah area multipurpose where there limestone quarry, factories, tourist attractions, rock-climbing as territoral constraints found are landslides faults. To support potential region, infrastructures safe from...

Abstract A new multibeam dataset of Nieuwerkerk and Emperor China (NEC) seamounts was acquired during the Jalacitra 2-2022 ”Banda” Expedition in Banda Sea region. This study discusses a morphometric analysis based on high-resolution bathymetry digital elevation model (DEM) describes features, namely: slope, profile curvature, aspect. Morphological results indicate that seamount has an area 2,416 km 2 with maximum peak approximately 3,460 m above seabed 357 below water surface. In southwest...

Batubara yang cocok untuk kegiatan gasifikasi bawah permukaan harus memenuhi persyaratan, antara lain kondisi geologis, ketebalan, kedalaman, kadar air total dan abu. Berdasarkan persyaratan ini, tidak semua batubara dalam bisa dimanfaatkan permukaan. Kegiatan eksplorasi perlu dilakukan meminimalisasi risiko geologis mengetahui batubaranya. hasil permodelan, ditemukan lapisan D dengan kriteria kedalaman 200-300 m, ketebalan >5 lembab+kadar abu <60%, nilai kalor 4.912-6.275 kkal/kg,...

Lapisan batubara D termasuk ke dalam Blok Suban Burung, Formasi Muara Enim, Subcekungan Palembang Tengah, Cekungan Sumatera Selatan, berumur Miosen Tengah sampai Akhir. Penelitian ini bertujuan untuk mengetahui karakteristik dan lingkungan terhadap percontoh Batubara dari kegiatan pengeboran penelitian gasifikasi bawah permukaan. Metode yang digunakan adalah analisis petrografi batubara, nilai reflektansi vitrinit, interpretasi pengendapan berdasarkan diagram Diessel Calder. didominasi oleh...

The Majalengka sub-basin is composed of an approximately 4 km thick turbidite-sequence subdivided into three formations as follows Cisaar, Cinambo and Cantayan Formations. last formation by two members, i.e. Halang Bantarujeg Formations, which distinguished the volcanic content. All sedimentary rocks were deposited during middle to late Miocene, where magmatic tectonic influences are particularly dominant. Petrography geochemical analyses suggested that sandstone composition was derived from...

Karakteristik batubara dari dua wilayah prospek di Sumatera dievaluasi dengan menggunakan metode kimia dan petrografi batubara. Penelitian terfokus pada evaluasi peringkat (tingkat pembatubaraan daerah penelitian), tipe (komposisi material organik lingkungan pengendapan batubara) serta grade (kandungan inorganik yang bisa berpengaruh terhadap proses utilisasi) Lapangan X memiliki lapisan merupakan bagian Formasi Muaraenim Kasai Cekungan Selatan sedangkan lapangan Y Petani Tengah. Sebanyak...

As the most prolific basin, Central Sumatra Basin is a very mature basin for hydrocarbon exploration. Most of productive reservoir came from Neogen deposits therefore stratigraphic reconstruction depositional environment distribution focused on this deposits. Meanwhile Paleogene and gross (GDE) has not been explore further especially southern part basin.
 Paleogen like Kelesa Formation syn rift deposition which was deposited in center basin. The lithofacies development consist 3 major...

Abstract This paper focuses on confusing various theories of Middle to Late Miocene sedimentary rocks, especially the Halang Formation in CiMande and Panaruban River Banyumas Central Java. Previous studies revealed miscellaneous conclusions regarding depositional system this formation. research was conducted with field observations, consisting 2 measured stratigraphy section. Lithofacies trace fossils are identified by making detailed vertical records outcrops. The lithofacies association...

Research of the depositional environment using geological mapping, petrography, gamma-ray (GR) log, palynology, and foraminifera fossils Bojongmanik Formation has led to formation several different conclusions about transition marine environment, which are attractive revisit. The expected results this research determine paleoenvironment Serpong Formations based on elemental geochemistry, development proxies portable X-ray fluorescence (pXRF) in fluvial transitional environments studies,...

The Nanggulan Formation in Kulon Progo, Yogyakarta, Indonesia, is rich ichnofossils as observed a cross-section of the Watupuru River. This research aims to explore relationship between ichnogenera, their behaviours and patterns during deposition Middle Upper Eocene period. study involved analyzing measured sections along River, paleocurrent measurements, palynology. Seventeen ichnogenera were identified linked seven depositional facies within Formation, i.e. Nummulites bank, prodelta,...

Abstract The first detailed mapping and recording of nannofossils was carried out on Kei Besar Island, Southeast Maluku. This area is mostly composed the Elat Formation, which mainly by intercalated calcarenite calcareous claystone. Total 48 samples were taken three measured sections (Hollat, Ngurdu Mata Hollat). Samples prepared using smear slide method, then observed under a polarized microscope at 1000 x magnification. species identified. Several index selected to define biostratigraphic...

DOI:10.17014/ijog.7.1.87-104Batujajar and its surrounding areas, situated in the west of Bandung Basin, are geologically composed various Tertiary rock formations with complex fold fault systems. Springs drilled wells sandstone aquifers, tuffaceous sand, breccias mark development their aquifer This study aimed to determine characteristics hydrogeochemistry by analyzing major ions stable isotopes (18O 2H) thirty-four hydrogeological objects. The groundwater flow pattern this area is...

Massive exploration effort in the study area was conducted 1996-2014 when deep-water drilling campaign found significant oil and gas discoveries but yet to optimally reach middle Miocene sandstone reservoirs. Outcrops, well bores 2D-seismic data had been incorporated this study. Datum age from several taxon indicators have utilized correlate unify various markers across into four key biostratigraphy markers: M40, M45, M50, M65. These are at that point tied 2D seismic act of main horizons...

IClimate is the prevailing weather condition of an area throughout year. Climate affects vegetation in a region. The research aimed to study climate and humidity change during Holocene Bandung Paleo-Lake based on palynomorph analysis. twenty-four samples were taken using hand drill 172.5 - 52.5 cm depth, continued with preparation determination. In this study, descriptive analysis comparison between pollen, spores their sediments show Paleo-Lake. results that which peat deposits showing four...

As a natural phenomenon, land movement does not occur suddenly, but it is long-term phenomenon in the form of un-recoverable low rates deformation caused by constant stress on slope body and known as creep. Therefore, very important to understand rheological characteristics soil under implication its strength time dependent behavior mass. The laboratory shear creep tests were carried out 15 undisturbed volcanic clay samples taken from southern slopes Lembang Village, Cililin, West Java,...

Perairan Tanjung Berikat merupakan salah satu perairan di daerah Pulau Bangka yang dilalui oleh jalur granit Asia Tenggara. Keberadaan ini berhubungan erat dengan keterdapatan batuan berperan sebagai sumber pembawa timah baik daratan dan perairan. Namun demikian, Granit Klabat diketahui pada hanya terlihat darat saja. Sementara itu, jika melihat dalam bentuk singkapan maupun bongkah-bongkah wilayah pantai sekitarnya, maka diduga adanya sebaran menerus hingga ke arah laut. Metode digunakan...

DOI:10.17014/ijog.9.3.291-302The methodology of facies analysis may include statistical examination to establish a local model. Without such examination, it is very difficult predict the succession and interpret changes in depositional conditions from thick or complex stratigraphic sections. Based on survey sedimentary geologic literature Indonesia, suggested that aforementioned method has relatively seldom been used Indonesia. Such situation reflect gap information and, accordingly, seems...

Abstract Walat Formation is equivalent to Bayah Formation. This formation the beginning of Bogor basin deposition. In this case, age and environment have been analyzed by previous researchers, but results interpretations different ranges, especially from its palynological aspect which until now rarely using aspect. research was conducted identify depositional in Sukabumi region pollen spores confirm studies. Measure section carried out sampling chemical treatment method see palynomorph...

Proxapertites have become one of the most significant indicators ancient rock in Indonesia. Walat Formation is oldest rocks exposed Sukabumi, West Java, These not been described detail about their characteristics previous studies, especially on Formation. Therefore, knowing becomes interesting, Formation, which can be a reference for late Eocene (37.8 - 33.9 million) Acetolysis method was carried out preparation pollen and spores; description determination were to see that present Result,...