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"Gunung Jambu merupakan sebuah bukit karbonat terisolir. Keunikan dari bukit ini ialah pada kondisi geologinya, di mana batugamping tersingkap secara masif. Bukit ini termasuk pada Anggota Batugamping Formasi Bojongmanik yang memiliki umur Miosen dengan komposisi litologi berupa batugamping. Bukit ini terletak pada Kecamatan Leuwisadeng, Kabupaten Bogor, Jawa Barat. Penelitian ini bertujuan untuk menentukan mikrofasies, zona fasies, serta tipe dan kualitas porositas pada sayatan tipis batugamping di daerah penelitian. Metode yang digunakan berupa analisis secara kualitatif dan kuantitatif dengan menggunakan data sayatan petrografi untuk mengetahui tekstur, kandungan fosil, serta porositas. Berdasarkan analisis mikrofasies pada daerah penelitian, ditemukan 5 tipe mikrofasies standar yang berbeda berdasarkan Flugel (2010), yaitu SMF 5, SMF 7, SMF 8, SMF 10, dan SMF 12. Setelah tipe mikrofasies diketahui, didapatkan 4 tipe zona fasies berdasarkan model Wilson (1975), yaitu FZ 2 deep shelf, FZ 4 slope, FZ 5 platform margin reefs, dan FZ 7 open marine. Terdapat 5 jenis porositas yang berkembang, yaitu vug, moldic, intraparticle, fracture, dan fenestral dengan nilai porositas berkisar antara 0 hingga 22% yang dihitung menggunakan rumus berdasarkan data grid point counting. Dari nilai porositas tersebut dapat diketahui batuan pada daerah penelitian terdapat kualitas porositas negligible hingga good, sehingga disimpulkan bahwa zona fasies mungkin memiliki hubungan terhadap kualitas batugamping tertentu.

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Mount Jambu is an isolated carbonate hill. The uniqueness of this hill is in its geological conditions where the limestone is exposed massively. This hill belongs to the Limestone Member of the Bojongmanik Formation which has a Miocene age with a lithological composition of limestone. This hill is located in Leuwisadeng District, Bogor Regency, West Java. This study aims to determine the microfacies, facies zones, and the type and quality of porosity in thin sections of limestone in the study area. The method used is in the form of qualitative and quantitative analysis using petrographic incision data to determine texture, fossil content, and porosity. Based on microfacies analysis in the study area, 5 different types of standard microfacies were found according to Flugel (2010), namely SMF 5, SMF 7, SMF 8, SMF 10, and SMF 12. After the microfacies type was known, 4 types of facies zones were obtained based on the Wilson model. (1975), namely FZ 2 deep shelf, FZ 4 slope, FZ 5 platform margin reefs, and FZ 7 open marine. There are 5 types of porosity that develop, namely vug, moldic, intraparticle, fracture, and fenestral with porosity values ​​ranging from 0 to 22% calculated using a formula based on grid point counting data. From the porosity value, it can be seen that the rock in the study area has a negligible to good porosity quality, so it can be concluded that the facies zone may have a relationship with certain limestone qualities."

"Kawasan Gunung Endut memiliki manifestasi panas bumi yang potensial dan pengembangannya sedang dalam tahap eksplorasi. Oleh sebab itu diperlukan data geologi teknik sebagai parameter yang digunakan untuk melakukan analisis kelayakan daerah penelitian dalam pembangunan infrastruktur wellpad. Adapun tujuan dari penelitian ini untuk mengetahui kondisi geomorfologi, karakteristik geologi teknik tanah dan batuan, serta analisis kelayakan daerah penelitian. Dalam tahapan penelitian ini dilakukan pemetaan geologi teknik untuk mengidentifikasi dan mengamati parameter geologi teknik yang meliputi deskripsi geologi teknik batuan dan tanah, aspek morfogenesa yang bekerja, tingkat pelapukan, kekuatan batuan, dan bidang diskontinuitas pada batuan. Dilakukan juga pengolahan data digital untuk analisis aspek geomorfologi dan uji mekanika tanah untuk mengetahui karakteristik tanah. Selain parameter geomorfologi dan geologi teknik batuan dan tanah, dalam analisis kelayakan dilakukan juga identifikasi kesesuaian lahan dalam aspek aksesibilitas jalan dan konektivitas dengan sumber air. Berdasarkan analisis kondisi geomorfologi, didapatkan dua satuan yang terdiri dari Satuan Perbukitan Vulkanik Sangat Landai-Agak Curam dan Satuan Perbukitan Vulkanik Agak Curam-Sangat Curam. Ditinjau dari karakteristik geologi teknik, diperoleh 4 satuan yang terdiri dari Satuan Andesit Lapuk Rendah (ALR), Satuan Tuf Lapuk Kuat (TLK), Satuan Endapan Koluvium (EK), Satuan Tanah Pasir Gradasi Baik (SW). Akses jalan berjarak sekitar 300 meter dari daerah penelitian, sedangkan untuk sumber air dapat diperoleh dari sungai yang berada di dalam daerah penelitian. Berdasarkan integrasi data geomorfologi, karakteristik geologi teknik, dan kesesuaian lahan, daerah penelitian dinyatakan kurang layak untuk pembangunan wellpad panas bumi.

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The Mount Endut area has potential geothermal manifestations and its development

is in the exploration stage. Therefore , engineering geological data is needed as a

parameter used to analyze the feasibility of the research area in the wellpad. The purpose

of this study is to determine the geomorphological conditions, geological characteristics

of soil and rock engineering, and analysis of the feasibility of the research area. In this

research stage, engineering geological mapping is carried out to identify and observe

technical geological parameters which include descriptions of rock and soil engineering

geology, working morphological aspects, weathering levels, rock strength, and

discontinuity areas in rocks. Digital data processing is also carried out for analysis of

geomorphological aspects and soil mechanics tests to determine soil characteristics. In

addition to the geomorphological and engineering geology parameters of rock and soil,

the feasibility analysis also identifies land suitability in terms of road accessibility and

connectivity with water sources. Based on the analysis of geomorphological conditions,

two units were obtained consisting of a Very Sloping-Slightly Steep Volcanic Hills Unit

and a Slightly Steep-Very Steep Volcanic Hills Unit. In terms of technical geological

characteristics, 4 units were obtained consisting of Slightly Weathered Andesite Unit

(SWA), Strongly Weathered Tuff Unit (SWT), Coluvium Deposits Unit (CD), Well

Gradient Sand Soil Unit (SW). Road access is about 300 meters from the research area,

while water sources can be obtained from rivers located within the research area. Based

on the integration of geomorphological data, characteristics of engineering geology, and

land suitability, the research area was declared unfit for geothermal wellpad."

"ABSTRAKJakarta merupakan wilayah yang berpotensi mengalami gempa bumi. Salah satuparameter resiko dan bahaya gempa bumi adalah parameter kelas situs tanahwilayah tersebut yang ditentukan dengan kecepatan geser tanah pada kedalaman30 m (VS30). VS30 diperoleh dari survei lapangan diantaran N-SPT, MASW,seismic borehole dan masih banyak lagi. Namun untuk menentukan kelas situsseluruh Jakarta, survei lapangan tidak memungkinkan sehingga diperlukanmetode empiris untuk menentukan VS30. Metode empiris yang sudah ada diantarametode Wald-Allen (Amerika) dan metode Matsuoka (Jepang). Metode Wald-Allen menunjukkan hubungan antara VS30 dengan topografi slope, sedangkanmetode Matsuoka menunjukkan hubungan antara VS30 dan geomorfologi areatinjauan. Namun, tanah serta wilayah Jakarta berbeda dengan kedua metodetersebut sehingga diperlukan evaluasi dari keduanya manakah metode yang cocokdigunakan di Jakarta. Salah satu bentuk evalasi dengan metode perbandingan danlog rasio antara data lapagan dan empiris. Pengolahan data dibantu denganmenggunakan software Arc-GIS hingga diperoleh peta topograsi slope, topografielevasi dan geomorfologi. Setelah dilakukan analisis perbandingan serta analisislog ratio maka diperoleh hasil metode Wald-Allen lebih cocok untuk Jakartadibandingkan metode Matsuoka.

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ABSTRACTJakarta is area where is earthquake potentially. One of parameter risk and hazardof earthquake is represented site class of soil determined by shear wave velocityof the top 30 m soil layer (VS30). VS30 is collected by field survey such as MASW,N-SPT, seismic borehole and so on. However, to determine site class of Jakarta,field survey is impossible so empirical method necessary used to determine VS30.Empirical method was published by Wald-Allen (United State) and Matsuoka(Japan). Wald-Allen?a method explain about correlation between VS30 andtopographic slope, while Matsuoka?s method explain about correlation betweenVS30 and geomorphology of observation area. However, characteristic of soil ofJakarta is different from all of method, so evaluate both of them is important toknow what method is compatible to Jakarta. One of evaluation used ratio methodand log ratio method between field survey and empirical datas. Data processinguse Arc-GIS to get topographic slope map, topographic slope map, andgeomorphologic map. After, analyze ratio and log ratio so we get the result thatWald-Allen?s method is more compatible to Jakarta than Matsuoka?s method."

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ABSTRACTBasic Geological Mapping, 5th Edition is an essential basic guide to field techniques in mapping geology. Now completely revised and updated the book retains the concise clarity which has made it an indispensable instant reference in its previous editions. It provides the reader with all the necessary practical information and techniques that they will need while carrying out work in the field, covering a wide spectrum of different conditions, needs and types of countries. This edition covers new developments in technology including Google Earth and the use of GPS. This is an ideal field guide to geological mapping for 2nd/​3rd year undergraduates of Geology, Hydrogeology and Geological Engineering."

""An Introduction to Geological Structures &​ Maps is a concise text that leads the students in easy stages from the simplest ideas on geological structures right through to more advanced geological mapping techniques. The approach is designed to help students with little or no supervision: each new topic is simply explained and illustrated by figures, and exercises are set on successive maps. If students are unable to complete a problem, they can read on to obtain more specific instructions on how theory may be used to solve it." "This considerably enlarged seventh edition is even more user friendly and mirrors present trends in map syllabuses. It includes photographs that will add to the understanding of geological structures already illustrated by text-figures and block diagrams in the appendix. The appendix has been fully updated and now includes completed sections of all maps and solutions to the map problems, which enables the reader to check that his or her attempts have been successfully carried out."--"

"Tulehu terletak di bagian Timur pulau Ambon, Maluku. Tulehu merupakan daerah dengan prospek panasbumi yang tinggi. Suhu reservoir dari sistem tersebut diperkirakan mencapai lebih atau sama dengan 230oC. Sudah cukup banyak penelitian yang dilakukan disini untuk mengetahui kondisi geologi, geokimia, dan geofisika, sehingga datanya dapat dijadikan data pendukung pada penelitian ini. Interpretasi geologi tidak lepas dari interpretasi dan analisis struktur geologi dan litologi atau kelompok batuan yang menyusunnya. Penelitian ini akan menggambarkan kondisi geologi daerah Tulehu berdasarkan interpretasi remote sensing dan data hasil observasi lapangan yang sudah dilakukan berupa data struktur dan satuan litologi, selanjutnya akan dipadukan dengan data geokimia dan geofisika untuk membuat model konseptual geotermal WKP Tulehu, penentuan sistem geotermal, delineasi area prospek, hingga rekomendasi titik pemboran. Daerah penelitian berada pada daerah Suli, Tial, Tulehu, dan Waai, Kecamatan Salahutu, Provinsi Maluku. Penelitian ini diawali dengan interpretasi data remote sensing berupa citra Landsat 8, dan DEM yang diproses menggunakan software ArcGIS 10.2.1, untuk mendapatkan peta geologi tentatif. Peta tersebut kemudia digabungkan dengan data geologi untuk mendapatkan peta geologi yang lebih komprehensif sehingga dihasilkan bahwa sesar Banda dan sesar Huwe merupakan sesar normal yang membuat graben dengan area gunung Eriwakang yang mengalami depresi, satuan litologi penyusunnya terdiri atas tujuh satuan yang dibagi berdasarkan genesa dan satuan vulkanostratigrafi. Peta geologi yang lebih komprehensif dengan semua analisisnya kemudian digabungkan dengan data geokimia dan geofisika untuk mendapatkan gambaran model konseptual geotermal sehingga diketahui sistem geotermal WKP Tulehu merupakan system high enthalpy, liquid-dominated system. Berdasarkan hasil analisis WKP Tulehu memiliki luas area prospek sekitar 3,4 Km2 dan potensi geotermal sebesar 17-34 MW.

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Tulehu is located in the eastern part of the island of Ambon, Maluku. Tulehu is an area with high geothermal prospects. The reservoir temperature of the system is estimated to be more or equal to 230oC. There has been quite a lot of research conducted here to determine geological, geochemical, and geophysical conditions, so that the data can be used as supporting data in this study. Geological interpretation cannot be separated from the interpretation and analysis of the geological and lithological structures or rock groups that compose them. This study will describe the geological conditions of the Tulehu area based on remote sensing interpretation and field observation data that have been carried out in the form of structural data and lithological units, which will then be combined with geochemical and geophysical data to create a geothermal conceptual model for the WKP Tulehu, determination of the geothermal system, delineation of the prospect area, up to the drilling point recommendation. The research area is in the Suli, Tial, Tulehu, and Waai areas, Salahutu District, Maluku Province. This research begins with the interpretation of remote sensing data in the form of Landsat 8 imagery, and DEM processed using ArcGIS 10.2.1 software, to obtain a tentative geological map. The map is then combined with geological data to obtain a more comprehensive geological map so that the Banda fault and the Huwe fault are normal faults that make the graben with the depressed mount Eriwakang area, the constituent lithology unit consists of seven units divided by genesis and volcanostratigraphic units. A more comprehensive geological map with all the analysis is then combined with geochemical and geophysical data to get a conceptual description of the geothermal model so that it is known that the WKP Tulehu geothermal system is a high enthalpy, liquid-dominated system. Based on the analysis, the WKP Tulehu has a prospect area of about 3.4 km2 and a geothermal potential of 17-34 MW."

"Kabupaten Cilacap termasuk ke dalam daerah rawan gempa bumi. Pada tanggal 25 Januari 2014 pernah terjadi gempa dengan magnitudo 6,5 di Cilacap. Peristiwa gempa bumi yang terjadi didominasi oleh gempa yang bersumber dari Megathrust selatan Jawa yang dekat dengan Cilacap. Wilayah penelitian, yang berada di Selatan Kecamatan Kawunganten, Kabupaten Cilacap (Desa Ujungmanik, Kubangkangkung, dan Sidaurip), sebagian tersusun atas endapan lempung yang rentan dengan amplifikasi. Adanya kehadiran sesar membuat daerah semakin rawan terhadap gempa bumi. Dengan jumlah penduduk yang cukup banyak dan keterdapatan sarana prasarananya, maka diperlukan analisis tipologi dan kestabilan kawasan rawan gempa bumi sebagai langkah mitigasi. Analisis ini menggunakan empat parameter utama yaitu data litologi batuan, data sesar, data kemiringan lereng, dan data PGA permukaan. Seluruh parameter tersebut dilakukan skoring sesuai Peraturan Menteri Pekerjaan Umum Nomor 21 Tahun 2007 tentang Pedoman Penataan Ruang Kawasan Rawan Gempa Bumi. Hasil skoring tiap parameter digabung untuk menghasilkan sebuah peta tipologi dan sebaran kestabilan wilayah kawasan rawan gempa bumi. Hasil penelitian didapat bahwa wilayah penelitian memiliki kestabilan yang stabil, kurang stabil, dan tidak stabil dengan range skor 33-55 dan dibagi menjadi 5 tipe tipologi kawasan rawan bencana gempa bumi yaitu Tipe A, Tipe B, Tipe C, Tipe D, dan Tipe E.

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Cilacap Regency is included in an earthquake-prone area. On January 25, 2014, an earthquake with a magnitude of 6.5 occurred in Cilacap. The earthquake events that occurred were dominated by earthquakes originating from Megathrust South Java which is close to Cilacap. The research area in the South of Kawunganten District, Cilacap Regency (Ujungmanik, Kubangkangkung and Sidaurip Villages) is partly composed of clay deposits that are susceptible to amplification. The presence of faults makes the area more vulnerable to earthquakes. With a large population and the availability of infrastructure, typology and stability analysis of earthquake-prone areas is needed as a mitigation measure. This analysis uses four main parameters, rock lithology data, fault data, slope data and surface PGA data. All these parameters are scored in accordance with Minister of Public Works Regulation Number 21 of 2007 concerning Spatial Planning Guidelines in Earthquake Prone Areas. The scoring results for each parameter are combined to produce a typology map and distribution of regional stability in earthquake-prone areas. The research results showed that the research area had stable, less stable and unstable stability range score 33-55 and divided into 5 typological types of earthquake-prone areas, namely Type A, Type B, Type C, Type D, and Type E."