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SURVEY TINJAU BAHAN GALIAN NIKEL DAERAH SOLIGI, KECAMATAN OBI SELATAN KABUPATEN HALMAHERA SELATAN, MALUKU UTARA -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 9, No 2 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Ofiolite and metamorphic the oldest rock which found in Obi Island in pre-tertiery age. Contact of both rock estimated as structural contact. Ofiolite consist of peridotite, piroxenite, gabro, basalt, and metabasalt. As for metamorph are schist-mica and phylite. Those rocks especially found in the west side of Obi Island and the minor part found in the outcrops of the south.Peridotite in research area is source rocks which affected by hydrothermal fluids which occur in the end of magmatism processes and change peridotite into serphentinite (peridotite-serphentinite) and this processes known as the beginning of nickel laterite deposit formation process.Mechanical and chemical weathering to the provenance which contain Ca, Mg, Fe, Na, Si, Cr, Mn, Ni, Co, causes this integration and decomposition where those material soluble and then deposited again as somekind of mineraqlsw

LOW RANK COAL FORMASI SAJAU DAERAH TELUK SEMANTING DAN TANJUNG BATU KECAMATAN PULAU DERAWAN, KABUPATEN BERAU – KALIMANTAN TIMUR -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 5, No 2 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The studied area belong to Teluk Semanting vilage and Tanjung Batu vilage, Pulau Derawan District, Berau Regency, East Kalimantan Province.Coal Bearing Formation is Sajau Formation with the younger from Latih Formation at PT. Berau Coal mine, description is black, vitreous luster, subconcoidal fracture, very hard to soft, brown streak, is general resin and piryt and sometimes wood structure. Phisycal is based on Sub Bituminus B Coal. Outcrop is followed the folded wich North West – South East, the range of strike N300ºE – N00ºE and N120ºE – N170ºE. The dip of coal is 8ºNE - 28ºNE and 5ºSW - 13ºSW.Indicated reserve of coal at study area is based on resources calculating with make use of the regional geologic explanation has reached 136 million ton, This reserve belong to the middle of the big mining.Quality of coal at study area with the measured parameter is “inherent Moisture” =10,20%-14,58,8%, Ash = 1,10%-7,61%, “Volatile Matter” = 36,58%-45,49%, “Fixed Carbon” = 37,50-45,72%, “Total Sulphur” = 0,12%-2,86%, Calorivic value the range = 5.666 – 6.427 Kkal/kg.

SUMBERDAYA BATUBARA KAWASAN BLOK PT. TEUNOM RESOURCES, KAB. ACEH BARAT, PROPINSI NANGGROE ACEH DARUSSALAM -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Recognissances was carried out in blocks of coal PT. Teunom Resources, which all belong to Meulaboh area, West Aceh Regency, the Province of Nangrroe Aceh Darussalam.The area of Meulaboh geologically belong to Plio-Pliestocene age Tutut Formation in land and maish environment deposition. The litology consist of conglomerate, sandstone, claystone and lignite. The basin of this Formation deposition is well known as “ Meulaboh Embayment “.The compiled reference some previous exploration result on the thickness of coal seams in Meulaboh ranging some centimeters to 8 (eight) meters and morever the calorivic value ranging 3900 – 5100 cal/gr. The result of recognissance in the surveyed area appears that the observed coal seams occurs as intercalation and lenses of some centimeter to 80 centimeters of thickness where the strike of layer trending northwest – southeast and dipping ranging 4º - 5º. Among the above mentioned block, the number of seam outcrops occur much more in block PT. Teunom Resources. The reserve restricted to the 3 layers of 80 centimeters dippingt less 5º is roughly estimated 2.633.133 tons.The quality of coal as analyzed by the Directorate of Minerals Resources in Bandung appears as follow: Total Sulphur 0.19% - 0.35% adb; Ash 4.33% - 7.39% adb; Fix Carbon 33.00% - 39.27% adb; Volatile Matter 47.01% - 54.17% adb; Moisture 8.19% - 8.97% adb; Total Moisture 43.22% - 47.23% ar; and Free Moisture 38.15% - 42.03% ar.

INVENTARISASI POTENSI BIJI BESI DAERAH GUNUNG BATU BESI DESA MASEWE KECAMATAN PAMONA TIMUR, KABUPATEN POSO, PROPINSI SULAWESI TENGAH -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 7, No 2 (2009): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Inventory of potency of iron ore mineral resources in Batu Besi Mountain Region, at the village of Masewe, Subdistric of East Pamona, Regenct of Poso, Provine of Central Sulawesi was sponsored by Energy and Mineral Resources Office of Region of Poso and conducted by Team of Geologists from Faculty of Geological Engineering, University of Padjadjaran Bandung.Iron ore mineral resources occur ultrabasic rock of Pompangeo Formation which is older than Cretaseous. Sevaral sample exhibit Fe content larger than 50% which have domestic and international marketing prospect especially in China

NIKEL LATERITIK DI DAERAH TANAH MERAH, TABLASUFA DAN ORMO, KABUPATEN JAYAPURA, PROPINSI PAPUA -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 5, No 3 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Nickel occurs in bedrock of ultramafic spread surrounding Jayapura to the west along the northeren beach of Papua, Occurs in layers of soil called Limonit and Saprolit where both are weathered of ultramafic bedrocks includes Peridotit, Harsburgit, Serpentinit, Dunit and Lerzolit.The geology of Jayapura including distribution of ultramafic and metamorphic rocks of Pra-Tersier age was uplifted to the land since the tectonic of Early Miocene to the present was subjected to some active tectonic characterized by steep and sharp morphology.From the result of previous investigations indicates that nickel grade are excellent and being prospective for industrial word especially in China. The highest obtained nickel grade reached 6 %.Fild investigation show the occurrence of DMP (Associated Minerals) in nickel area e.g. Iron (Fe), Cobalt (Co) and Chrom (Cr).

PENYELIDIKAN PENDUGAAN GEOLISTRIK UNTUK PENELITIAN AIR TANAH, DI ASRAMA RINDAM - SENTANI, KABUPATEN JAYAPURA, PROPINSI PAPUA -, Geni Dipatunggoro; -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 11, No 2 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Geo-electric investigation is done at Asrama Rindam areal, Sentani Resort, Jayapura Regenc, Papua Province. The investigationis required to detection of rock and subsurface condition. Methode of geo-electric to support for groundwater investigation to use the soldier need at the Asrama Rindam, Sentani Resort, The vertical layer are layer-1 as the soil, layer-2 as tufaceous brecia, laye-3 as tufaseous sand, layer-4 as tufaseous brecia, layer-5 as volcanic brecia, layer-6 as tufaseous sand, and layer-7 as volcanic brecia. The rock layer groundwater potencial or reservoar are tufaseous sand at the 10 meter and 49 meter depth.

KARST CITEUREUP UNTUK SUPLEMEN DOKUMEN AMDAL DAN PENAMBANGAN BATUGAMPING -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 4, No 2 (2006): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Karst can be defined as a peculiar and dry landscape developed as a result of dominantly dissolutional erosion of limestone by rain origin water which enter into the limestone and circulate in the underground drainage then resurgent to the surface as springs. The term karst is derived from the Yugoslavian language “kras” meaning “stone”, and has a root of Italian place Carso. This term is applied to a relative narrow strip of limestone extending along the northeastern coast of the Adriatic Sea.The composition of rocks in the investigated area consists of bioclastic Miocene aged limestone of the Kelapanunggal Formation overlying alternating claystone and sandstone belonging to the Cibulakan Formation of the same age.The Karst developed in investigation areas : 1. Dolines and 2. Kockpit Doline, 3. Swallow Holes, 4.Collapse Cave, 5. Singking Stream and 6. Uvala.

INITIAL SURVEY OF IRON SAND, AT THE MALANG, PEJAGRAN & KEBURUHAN VILLAGES, NGOMBOL SUBDISTRICT, PURWOREJO REGENCY, CENTRAL JAVA PROVINCE -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 10, No 2 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Initial Survey of iron sand Including geological mapping and shallow drilling (which only 10 meter penetration), this activity is a pilot project of PT. Karya Buana Abadi as the fander and trusted to geological engineering department survey team of Padjadjaran University Bandung and used Q Muria Swasindo flag as permission letter keeper from Purworejo Regency.Iron sand resources which fand in research area was rich, start from the surface of the soik to the bottom of shallow drilling, from its 50 Ha area there are 14 million ton deposit of iron sandwhich in the future wilk sold to Korea for industrial need.

GEOTECHNICS STUDY FOR DESIGN OF OPEN PIT SLOPES AT COAL MINING SITE PLAN, SAROLANGUN, JAMBI -, Geni Dipatunggoro; -, Zufialdi Zakaria; -, Irvan Sophian
Bulletin of Scientific Contribution Vol 9, No 2 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Site plan of coal mining at Sorolangun, Jambi, is required geotechnical study for cut slope design. Mining plan. In open pit plan, to take stable slope, is required slope mass rating (SMR). SMR method is requiring rock mass rating value. According to soil and weak-rock mass properties of Muaraenim Formation, stable

PEMETAAN GEOLOGI NIKEL LATERIT DAERAH SP UNIT 25 DAN SEKITARNYA KECAMATAN TOILI BARAT, KABUPATEN BANGGAI, PROPINSI SULAWESI TENGAH -, Geni Dipatunggoro
Bulletin of Scientific Contribution Vol 8, No 3 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The morphology of investigated area is a flat area and hilly area at elevation reaching 20 meters above the sea level. The lateritic nickel is a residual soil from weathering, resulting from serpentinite, hasburgite and dunite being ultramafic complex according to the geologic map of Batui sheets, Celebes.The extent of investigation is 8000 hectare as the permit from the regency of Banggai, and the thichness of nickel bearing lateritic soil averaging 2 meters, and therefore is roughly estimated 160.000.000 cubic meters. If the specivic gravity of lateritic soil is 2.6 and nickel content average 0.8 %, the reserve of lateritic nickel is will be 160,000,000 M³x 2.6 x 0.8% = 3,328,000 Tons. It is suggested to be mined by open pit method because the lateritic soil on the surface with only averaging thichness of soil 2 meters.

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