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All Journal Bulletin of Scientific Contribution : Geology Journal of Geosciences and Applied Geology
Ganjar Gani, Reza Mohammad
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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METHOD TO IDENTIFY THE FACIES ASSOCIATION ARCHITECHTURE BASED ON CORE ANALYSIS Ganjar Gani, Reza Mohammad; Firmansyah, Yusi; Nurdeani, Rifky
Journal of Geological Sciences and Applied Geology Vol 2, No 3 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i3.15755

Abstract

Rock is a very important in knowing the geological processes that developed in the past and present. The geological processes recorded in the core rock or often known as the core. Core is a rock of subsurface drilling. From the rock core can be known the characteristics of rocks ranging from megascopic and microscopic characteristics. The results of megascopic and microscopic analysis will be known facies, deposit environments, facies associations and architecture. The data contained 3 rocks that have been in the description, after the analysis there are 3 facies including the foraminifera limestone, sandstone foraminifera and claystone foraminifera. The foraminifera limestone is deposited on the Patch Reef Interior Platform environment, the foraminifera sandstones are deposited on the Restricted Interior's platform environment and the foraminifera claystone is deposited on the Open Marine Interior Platform environment. All three facies are integrated into the facies association Restricted - Open Marine Platform.Keywords : Core, Facies, Facies Association
LITHOLOGIC ORDER MAPPING AND ROCK RESOURCES INVENTORY OF KUTAWARINGIN QUADRANGLE, WEST JAVA Ganjar Gani, Reza Mohammad; Firmansyah, Yusi; Nurdrajat, Aji
Journal of Geological Sciences and Applied Geology Vol 2, No 4 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v4i2.18377

Abstract

In general, the southern part of Bandung is composed of rocks produced by volcanic activity. Research in this region based on the want to understand the geology of volcanoes in Bandung and surrounding areas including the origin of the formation of the Bandung Basin (Bronto & Hartono, 2006). The Bandung basin is almost surrounded by volcanoes; even in the midst there is also volcanic rock (Silitonga, 1973, Alzwar drr., 1992). Information about why and how the area of Bandung to be controlled by volcanic rocks is needed to find out more potential resources as well as geological disasters due to volcanic activity. This study aims to decide the history of volcanism in South Bandung. I want to represent a complex area seen from the diversity of geological and rock environment conditions. This diversity condition controls the landscape and geological conditions observed at this time. The purpose of the preparation of this study is to be used to develop the Stratigraphic order and inventory of minerals.Keywords: Kutawaringin, stratigraphy, resource potential
COAL SEAM ANALYSIS WEST BATURAJA SUB-DISRICT, SOUTH SUMATERA Ganjar Gani, Reza Mohammad; Firmansyah, Yusi
Journal of Geological Sciences and Applied Geology Vol 2, No 5 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i5.20244

Abstract

Sumatera island is located between 3 NH to 6 SH and 96 EL to 106 EL, along 1,700 km northernto the South, parallel to the subduction zone between the Sunda plate and Indian Oceanic plate onthe western part of Sumatera Island. The western part of Sumatera Island is a fore deep basin.Parallel to it is the Bukit Barisan chain. Towards the eastern part, there is the foreland basin ofNeogen. At the central zone of Bukit Barisan chain, there is the in-between basin. The SouthSumatera Basin starts from the eastern part of Bukit Barisan stretching to the south-east of theocean and adjoining to the basin at the boundary of Bukit Barisan in the south-west and tertiarySunda Basin in the south-east. Coal at the basin or on this formation with low rank is generallylignite. It is only at the young andesite intrusion (at Bukit Asam) where this lignite is altered to behigh rank coal. On this formation coal is divided into three groups, namely, upper part (6 – 7 seams),central part, and lower part (8 – 10 seam). The coal development is mainly autochthon, in the forestenvironment where there is no indication of the existence of swamp vegetation element. Based onthe data, it can be concluded that coal resource at the survey location has quite good quality, withmoderate calorific value and low sulphuric content. Thus, it can be classified into the ‘brown coal’.
POTENCY OF SOIL WATER IN MASINAM ISLAND BASED ON THE ROCK RESISTIVITY VALUE Firmansyah, Yusi; Restu, Abigail; Suganda, Bombom Rachmat; Dwi Hadian, Mohammad Sapari; Ganjar Gani, Reza Mohammad
Journal of Geological Sciences and Applied Geology Vol 2, No 5 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i5.20241

Abstract

Groundwater is water that is contained in soil layers or rocks that are located below the soilsurface. The resistivity or geoelectric method is used to obtain an anomaly of material under thesurface using electrical properties. 2 Dimensional Geoelectric Measurements are carried out asmany as 5 Tracks. From the results of the analysis based on surface data, the resistivitydistribution value in the study area can be interpreted to obtain 3 rock packages with low, mediumand high types of resistance. If it has low resistance (smaller than 45 Ωm), the lithology in thispackage is claystone, this layer is interpreted as not being able to store water and tends to easilyescape the water. While the value of the medium type of resistance (45 μm to 200 Ωm) has goodporosity. The lithology of this package is interpreted as sandstone. Lithology at high resistivityvalues (greater than 200 Ωm), is interpreted as limestone. This limestone layer is presumed tohave undergone a karstification process and presumably, this layer has the potential to be a goodaquifer that can accommodate enough water and drain at a certain time.
DEPOSITIONAL ENVIROMENT CARBONATES SANDSTONE UNIT OF THE NYALINDUNG FORMATION BASED ON OUTCROP DATA Firmansyah, Yusi; Ganjar Gani, Reza Mohammad; Fachrudin, Kurnia Arfiansyah
Journal of Geological Sciences and Applied Geology Vol 2, No 3 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i3.15754

Abstract

The research area is located in Loji Village, Simpenan District, Sukabumi Regency, West Java Province. The research was conducted by geological mapping method. The determination of the carbonaceous rocks precipitation environment based on the characteristics of lithology and fossil analysis. Based on the characteristics of lithology, this unit consists of carbonate sandstones. In megaskopis unit of this Carbonate Sandstone has physical characteristics, brown, medium grain sand size - very fine sand, circular round, open pack - closed, good sorting and bad permeability. The results of fossil foraminifera bentonic and plantonic analysis show that the bathymetry zone is at the outer center of neritik So it can be predicted that the deposition environment of this unit is in shallow sea.Keywords : lithologic characteristics, bentonic foraminifera, depositional environment
Pemetaan Pintas dan Analisis Geologi Lingkungan, Kecamatan Kutawaringin, Kabupaten Bandung, Provinsi Jawa Barat Setiawan, Iwan Fahlevi; Ganjar Gani, Reza Mohammad
Bulletin of Scientific Contribution Vol 18, No 2 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v18i2.28433

Abstract

Kabupaten Bandung memiliki 31 Kecamatan, 270 Desa dan 10 Kelurahan yang terbagi ke dalam 8 Wilayah Pengembangan (WP) (Buku Rencana Kabupaten Bandung 2016-2036). Sejalan dengan kondisi seperti ini perkembangan daerah Kabupaten Bandung cukup siginifikan baik di bidang perekonomian, kependudukan, jasa, industri, pertanian dan sebagainya, menyebabkan timbulnya kebutuhan lahan untuk pembangunan prasarana fisik dan pengembangan wilayah baik untuk pemukiman, industri, perkantoran dan lainnya. Menurut Yovi (2015) bahwa proses perkembangan suatu kota akan berpotensi menciptakan tantangan bagi perencanaan kota yang sangat terkait dengan perubahan penggunaan lahan. Setiap perubahan penggunaan lahan tentunya akan menimbulkan berbagai dampak terhadap lingkungan. Oleh karena itu analisis geologi lingkungan di Kutawaringin dilakukan untuk mengetahui sejauh mana kondisi geologi lingkungan daerah tersebut dan diharapkan data ini dapat digunakan oleh berbagai pihak dalam rangka kegiatan pembangunan. Penelitian ini merupakan tahap awal yang lebih ditekankan kepada pengumpulan data sekunder berupa data spatial yang meliputi peta topografi, citra satelit, peta geologi, peta penggunaan lahan, peta kehutanan, dan data penunjang lainnya serta didukung oleh data pengamatan lapangan. Berdasarkan komponen-komponen daya dukung sumber daya dan kendala geologi yang berkembang di kecamatan Kutawaringin, maka wilayah Kecamatan Kutawaringin dapat dibagi menjadi tujuh Satuan Geologi Lingkungan (SGL), yaitu: SGL 1, SGL2, SGL 3, SGL 4, SGL 5, SGL 6 dan SGL 7.  Masing-masing dari satuan tersebut memiliki karakteristik tersendiri
PERANAN ASPEK STRATIGRAFI DAN GEOLOGI DALAM MENGKAJI POTENSI GERAKAN TANAH DI KECAMATAN PELABUHAN RATU, KABUPATEN SUKABUMI Firmansyah, Yusi; Ganjar Gani, Reza Mohammad; Setiadi, Djadjang Djedi; Adycipta, Adycipta
Bulletin of Scientific Contribution Vol 15, No 1 (2017): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.928 KB) | DOI: 10.24198/bsc.v15i1.11995

Abstract

ABSTRAKPenelitian ini dilakukan untuk menilai potensi gerakan tanah yang mengacu kepada aspek-aspek geologi yang berkembang pada daerah penelitian. Secara astronomis daerah penelitian terletak pada 7o 0’ 3.15” – 7o 5’ 26.89” LS dan 106o 37’ 43.84” – 106o 43’ 10.28” BT, dengan dimensi 10x10 Km. Aspek geologi yang digunakan untuk mengidentifikasi pergerakan tanah antara lain geomorfologi, stratigrafi dan geologi struktur, selain dari ketiga aspek tersebut kami juga mempertimbangkan aspek tutupan lahan sebagai pemicu pergerakan tanah. Dalam menganalisa potensi pergerakan tanah metoda yang digunakan adalah skoring, dimana variabel yang akan digunakan diberi nilai dan dimasukan kedalam kelas-kelas. Dari hasil analisis potensi gerakan tanah, dapat disimpulkan bahwa daerah penelitian didominasi oleh zona stabil hingga kurang stabil. Sedangkan untuk daerah yang dianggap tidak stabil berada dibeberapa titik dari lereng sungai cimandiri yang juga merupakan zona sesar cimandiri dan sesar hegarmanah, dengan litologi batubeku andesit, batugamping dan alluvium.  Kata kunci : Longsor, Pergerakan Tanah, Pemetaan Geologi ABSTRACTThis study was conducted to assess the potential for ground movement, which refers to the geologic aspects of developing the research area. In astronomical research area lies in 7o 0’ 3.15” – 7o 5’ 26.89” LS dan 106o 37’ 43.84” – 106o 43’ 10.28” BT, with dimensions of 10x10 km. Geological aspects are used to identify the movement of the ground, among others, geomorphology, stratigraphy and geologic structure, apart from these three aspects we also take into consideration aspects of land cover as a trigger for ground movement. In analyzing the potential for ground movement is scoring method used, where the variables to be rated and incorporated into classes. From the analysis of the potential for ground movement, it can be concluded that the study area is dominated by stable to less stable zone. As for areas that are considered unstable are several points of the slope Cimandiri river which is also the fault zones and fault Cimandiri Hegarmanah, with lithology batubeku andesite, limestone and alluvium.  Keywords : Landslide, Soil Movement, geological mapping
Co-Authors Adycipta, Adycipta Bombom Rachmat Suganda, Bombom Rachmat Djadjang Jedi Setiadi Dwi Hadian, Mohammad Sapari Fachrudin, Kurnia Arfiansyah Nurdeani, Rifky Nurdrajat, Aji Restu, Abigail Setiawan, Iwan Fahlevi Yusi Firmansyah, Yusi