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PEMETAAN POTENSI PERTAMBANGAN BAHAN GALIAN PASIR DAN BATU DI WILAYAH KECAMATAN JAILOLO TIMUR KABUPATEN HALMAHERA BARAT Karim, Razak
DINTEK Vol 12 No 1 (2019): Dintek Volume 12 Nomor 1 Maret 2019
Publisher : Fakultas Teknik UMMU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1652.448 KB)

ABSTRACT The availability of data and information on the potential of mineral resources has a very important role in supporting investment in mining business activities. To realize this, the researchers collaborated with the West Halmahera District Government to conduct an investigation of Potential and Mapping Identification of the Sand and Stone Minerals Areas, especially in East Jailolo Subdistrict. The problem is how to provide basic data information regarding the potential of the existing minerals on site, both for the government, the private sector, businessman and the public community. And how potential of the minerals can be utilized optimally in the context of increasing mining business activities, and increasing Regional Original Income. The methodology and scope of this activity is to identify potential locations for economical of minerlas extraction. Technically, a study of the potential preparation of minerals is carried out through research and analysis of rock samples and conditions at the location of the investigation include geological, technical and distribution aspects. From the results of field investigations and analysis of actual conditions obtained; (1) At the location of the investigation found several types of potential rock and sand minerals in the form of volcanic rocks, the availability of which is almost completely spread throughout the investigation area. (2) These volcanic rocks are acidic to intermediate rocks, some of which are found fresh, and some are weathered. (3) This rock is found in the steep morphology of the hills to be very steep because of the very good condition of the rock characteristics. (4) The characteristics of these rocks include ; has water resistance, spesific gravity of 2.3-2.7 and compressive strength of 600–2400 kg/cm2, where these volcanic rocks can be used as home foundations materials, stone temples/ornamental stones, road coatings and foundations, and for other building materials. From the results of the investigation it is recommended that all parties manage the potential of the stone and sand, this can be done to provide income in the form of taxes and levies to the regional government.

Studi Identifikasi Potensi Pertambangan Bahan Galian Pasir dan Batu di Wilayah Kecamatan Sahu Timur dan Ibu Selatan Kabupaten Halmahera Barat Karim, Razak; Conoras, Wawan A.K
DINTEK Vol 12 No 1 (2019): Dintek Volume 12 Nomor 1 Maret 2019
Publisher : Fakultas Teknik UMMU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1776.133 KB)

Identification of potential minerals, is a preliminary activity in the inventory of potential mineral resources in an area. In this study, the process of identifying sand and rock excavation was carried out in the area of East Sahu Subdistrict and South Ibu District, West Halmahera, North Maluku Province. This study uses the preliminary exploration method step approach which is carried out by mapping the excavation material and observations and sampling in the field. The results of the study showed that the research area consisted of Volcanic Geomorphic units and Geomorphic Fluvial Units. Where volcanic geomorphic units are formed due to volcanic activities that are dated / quarterly. This unit is filled with quarterly volcanic rock units, consisting of volcanic breccia rocks occupying 25% of the research area. This lava rock also has an area of 7-9% of the area of investigation. Whereas for Alluvial deposits containing coastal sand deposits and volcanic breccia it has an area of only 2-3% of the total area of investigation. The remaining 62% is filled by tuffa rock units which are pyroclastic material in the form of falling pyroclastic and glide / flow pyroclastic. In addition, this volcanic material can be used as building materials such as home foundations, stone temples / decorative stones, road foundation, for road pavement even as asphalt road mixtures. Abstrak Identifikasi potensi bahan galian, merupakan suatu kegiatan pendahuluan dalam menginventarisir potensi sumberdaya bahan galian disuatu wilayah. Dalam penelitian ini, proses identifikasi bahan galian pasir dan batuan dilaksanakan di wilayah Kecamatan Sahu Timur dan Ibu Selatan kabupaten halmahera barat provinsi maluku utara. Penelitian ini menggunakan pendekatan tahapan metoda eksplorasi pendahuluan yang dilakukan dengan cara pemetaan bahan galian dan pengamatan serta pengambilan sampel dilapangan. Hasil penelitian memperlihatkan pada daerah penelitian terdiri dari satuan Geomorfik Vulkanik dan Satuan Geomorfik Fluvial. Dimana satuan Geomorfik vulkanik terbentuk akibat adanya aktivitas – aktivitas gunung api yang berumur recen/kuarter. Satuan ini diisi oleh satuan batuan vulkanik kuarter, terdiri dari batuan breksi vulkanik menempati 25% dari luas wilayah penelitian. Batuan lava ini juga memiliki luasan 7-9% dari luas wilayah penyelidikan. Sedangkan untuk endapan Alluvial yang berisikan endapan pasir pantai dan breksi vulkanik memiliki luasan hanya 2-3% dari luas wilayah penyelidikan. Sisanya sekitar 62% diisi oleh satuan batuan tuffa yang merupakan material piroklastik berupa piroklastik jatuhan maupun piroklastik luncuran/aliran. Selain itu juga material vulkanik ini dapat dimanfaatkan sebagai material bangunan seperti pondasi rumah, batu temple / batu hias, dasar pondasi jalan, untuk perkerasan jalan bahkan sebagai material campuran jalan aspal.    

PEMETAAN POTENSI PERTAMBANGAN BAHAN GALIAN PASIR DAN BATU DI WILAYAH KECAMATAN JAILOLO TIMUR KABUPATEN HALMAHERA BARAT Karim, Razak
DINTEK Vol 12 No 1 (2019): Dintek Volume 12 Nomor 1 Maret 2019
Publisher : Fakultas Teknik UMMU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1652.448 KB)

ABSTRACT The availability of data and information on the potential of mineral resources has a very important role in supporting investment in mining business activities. To realize this, the researchers collaborated with the West Halmahera District Government to conduct an investigation of Potential and Mapping Identification of the Sand and Stone Minerals Areas, especially in East Jailolo Subdistrict. The problem is how to provide basic data information regarding the potential of the existing minerals on site, both for the government, the private sector, businessman and the public community. And how potential of the minerals can be utilized optimally in the context of increasing mining business activities, and increasing Regional Original Income. The methodology and scope of this activity is to identify potential locations for economical of minerlas extraction. Technically, a study of the potential preparation of minerals is carried out through research and analysis of rock samples and conditions at the location of the investigation include geological, technical and distribution aspects. From the results of field investigations and analysis of actual conditions obtained; (1) At the location of the investigation found several types of potential rock and sand minerals in the form of volcanic rocks, the availability of which is almost completely spread throughout the investigation area. (2) These volcanic rocks are acidic to intermediate rocks, some of which are found fresh, and some are weathered. (3) This rock is found in the steep morphology of the hills to be very steep because of the very good condition of the rock characteristics. (4) The characteristics of these rocks include ; has water resistance, spesific gravity of 2.3-2.7 and compressive strength of 600?2400 kg/cm2, where these volcanic rocks can be used as home foundations materials, stone temples/ornamental stones, road coatings and foundations, and for other building materials. From the results of the investigation it is recommended that all parties manage the potential of the stone and sand, this can be done to provide income in the form of taxes and levies to the regional government.

Studi Identifikasi Potensi Pertambangan Bahan Galian Pasir dan Batu di Wilayah Kecamatan Sahu Timur dan Ibu Selatan Kabupaten Halmahera Barat Karim, Razak; Conoras, Wawan A.K
DINTEK Vol 12 No 1 (2019): Dintek Volume 12 Nomor 1 Maret 2019
Publisher : Fakultas Teknik UMMU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1776.133 KB)

Identification of potential minerals, is a preliminary activity in the inventory of potential mineral resources in an area. In this study, the process of identifying sand and rock excavation was carried out in the area of ??East Sahu Subdistrict and South Ibu District, West Halmahera, North Maluku Province. This study uses the preliminary exploration method step approach which is carried out by mapping the excavation material and observations and sampling in the field. The results of the study showed that the research area consisted of Volcanic Geomorphic units and Geomorphic Fluvial Units. Where volcanic geomorphic units are formed due to volcanic activities that are dated / quarterly. This unit is filled with quarterly volcanic rock units, consisting of volcanic breccia rocks occupying 25% of the research area. This lava rock also has an area of ??7-9% of the area of ??investigation. Whereas for Alluvial deposits containing coastal sand deposits and volcanic breccia it has an area of ??only 2-3% of the total area of ??investigation. The remaining 62% is filled by tuffa rock units which are pyroclastic material in the form of falling pyroclastic and glide / flow pyroclastic. In addition, this volcanic material can be used as building materials such as home foundations, stone temples / decorative stones, road foundation, for road pavement even as asphalt road mixtures. Abstrak Identifikasi potensi bahan galian, merupakan suatu kegiatan pendahuluan dalam menginventarisir potensi sumberdaya bahan galian disuatu wilayah. Dalam penelitian ini, proses identifikasi bahan galian pasir dan batuan dilaksanakan di wilayah Kecamatan Sahu Timur dan Ibu Selatan kabupaten halmahera barat provinsi maluku utara. Penelitian ini menggunakan pendekatan tahapan metoda eksplorasi pendahuluan yang dilakukan dengan cara pemetaan bahan galian dan pengamatan serta pengambilan sampel dilapangan. Hasil penelitian memperlihatkan pada daerah penelitian terdiri dari satuan Geomorfik Vulkanik dan Satuan Geomorfik Fluvial. Dimana satuan Geomorfik vulkanik terbentuk akibat adanya aktivitas ? aktivitas gunung api yang berumur recen/kuarter. Satuan ini diisi oleh satuan batuan vulkanik kuarter, terdiri dari batuan breksi vulkanik menempati 25% dari luas wilayah penelitian. Batuan lava ini juga memiliki luasan 7-9% dari luas wilayah penyelidikan. Sedangkan untuk endapan Alluvial yang berisikan endapan pasir pantai dan breksi vulkanik memiliki luasan hanya 2-3% dari luas wilayah penyelidikan. Sisanya sekitar 62% diisi oleh satuan batuan tuffa yang merupakan material piroklastik berupa piroklastik jatuhan maupun piroklastik luncuran/aliran. Selain itu juga material vulkanik ini dapat dimanfaatkan sebagai material bangunan seperti pondasi rumah, batu temple / batu hias, dasar pondasi jalan, untuk perkerasan jalan bahkan sebagai material campuran jalan aspal.    

K KAJIAN KARAKTERISTIK BATUAN BEKU ANDESIT SEBAGAI BAHAN BANGUNAN DI DAERAH SULAMADAHA KECAMATAN TERNATE BARAT KOTA TERNATE Karim, Razak -; Suriadi, Sahdan
DINTEK Vol 12 No 2 (2019): Dintek Vol 12 No. 2 September 2019
Publisher : Fakultas Teknik UMMU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1145.24 KB)

The potential of andesite igneous rock caused by volcanic activity, makes the City of Ternate has the potential of rock and sand extraction which is very abundant. Therefore this research was conducted to determine the characteristics of andesite rocks based on the results of testing physical and mechanical properties in the Laboratory, and how to determine the feasibility and non-feasibility of the availability of these andesite rocks as building construction raw materials in accordance with Standards. The study was carried out in the Sulamadaha area of ??Ternate City, where testing of rock samples was carried out at the SABO Laboratory, Center of Water Resources Research and Development in Yogyakarta and testing of other rock aggregate samples was carried out in the Laboratory of Structur and Materials in Civil Engineering Department, Khairun University in Ternate. Description of rocks has a fine solid gray color, afanitic textured crystalline subhedral, with mineral compositions contained in them are orthoclase feldspard, plagioclase, and quartz. The average compressive strength of andesite rocks from four samples is 1.357,015 kg/cm², for the test results the maximum shear resistance is 29,85%, while the average test results of water absorption ability in andesite rocks are 3,67 %. So it was concluded that andesite igneous rocks of Sulamadaha area, West Ternate District were feasible and fulfilled the requirements and quality of natural stone for building materials in accordance with Indonesian Industrial Standards (SII-0378-80).

KAJIAN HIDROLOGI DAN SISTEM PENANGGULANGAN AIR HUJAN PADA PENAMBANGAN BIJIH NIKEL (STUDI KASUS PT. BHAKTI PERTIWI NUSANTARA DI SITE SEPO KECAMATAN WEDA UTARA KABUPATEN HALMAHERA TENGAH PROVINSI MALUKU UTARA) Karim, Razak; Azizi, Masagus Ahmad; Umar, Ruslan M; Nurany, Nurany
Prosiding Temu Profesi Tahunan PERHAPI 2019: PROSIDING TEMU PROFESI TAHUNAN PERHAPI
Publisher : PERHAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/ptptp.v1i1.117

ABSTRAK Hidrologi dilakukan penyelidikan dengan cara pengumpulan data untuk dianalisis terhadap data sekunder meteorologi (curah hujan, hari hujan, suhu udara, kelembaban, tata guna lahan, dan lain-lain) dari lokasi penyelidikan Pit 1 dan Pit 2 PT.Bhakti Pertiwi Nusantara. Dengan data Hidrologi merupakan informasi yang palin penting bagi dalam pengelolaan sistem penanggulangan air hujan, dikarenakan jumlah hujan dan hari hujan sangat berpengaruh terhadap sistem penambangan. Penelitian ini bertujuan untuk mengetahui data hidrologi guna dalam sistem penanggulangan air hujan untuk pemanfaatan pada perancangan tambang terbuka khususnya di kemantapan lereng tambang. Penelitian ini dilakukan dengan cara pengumpalan data sekunder seperti data sebelumnya dan tersedia data, untuk data primer dilakukan secara langsung seperti pengamatan dan pengukuran lasngsung dilapangan. Analisis yang digunakan dengan Intensitas Curah Hujan, Debit Limpasan, dimensi saluran pengalihan air limpasan untuk mendapatkan hasil intensitas curah hujan di area pit. untuk debit limpasan diperoleh dari air berasal dari catchment area periode ulang 5 tahunan, dengan mempertimbangkan umur tambang yang diperkirakan 10 tahun. Kata kunci: Hidrologi, Curah Hujan, Debit impasan ABSTRACT Hydrology investigations are carried out by collecting data to be analyzed for secondary meteorological data (rainfall, rainy days, air temperature, humidity, land use, etc.) from the location of the Pit 1 and Pit 2 PT.Bhakti Pertiwi Nusantara investigations. Hydrological data is the most important information for managing rainwater management systems, because the amount of rain and rainy days is very influential on the mining system. This study aims to determine the hydrological data used in the rainwater control system for utilization in the design of open mines, especially in the stability of the mine slope. This research was conducted by secondary data coagulation such as previous data and available data, for primary data conducted directly such as observations and measurements in the field directly. The analysis used is the Rainfall Intensity, Runoff Discharge, runoff channel divert dimensions to get the results of rainfall intensity in the pit area. for runoff discharge obtained from water originating from the catchment area for the 5 year return period, taking into account the estimated mine life of 10 years. Keywords: Hydrology, Rainfall, Break Even Discharge

PEMULIHARAAN NASKHAH-NASKHAH NUSANTARA: SATU PENGALAMAN DAN PENGAJARAN Ab.Razak Bin Ab.Karim Ab.Razak
Jurnal Elektronik WACANA ETNIK Vol 5, No 1 (2015): Jurnal Elektronik WACANA ETNIK
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/we.v5.i1.59

Naskhah-naskhah Melayu merupakan naskhah yang paling banyakbilangannya di dunia dan tidak menghairankan naskhah-naskhah ini bertebaran diseluruh ceruk rantau di mana-mana sahaja terdapat sesebuah masyarakat Islam dan Melayu itu menetap. Bilangannya yang cukup banyak dan tidak terdapat angka yang benar-benar tepat menyebabkan naskhah-naskhah Melayu boleh ditemui di manamana sahaja. Oleh yang demikian, tidak menghairankan Indonesia merupakan negara yang paling ramai masyarakat Islam merupakan tempat naskhah-naskhah Melayu ini bertebaran.

Kajian Karakteristik Fisik Dan Mekanik Pastefill Yang Digunakan Pada Penambangan Emas Bawah Tanah Metode Cut And Fill Di PT. Nusa Halmahera Minerals–Gosowong Halmahera Razak karim; Anita kusrima
Prosiding Temu Profesi Tahunan PERHAPI 2018: Prosiding Temu Profesi Tahunan PERHAPI
Publisher : PERHAPI

PT. Nusa Halmahera Minerals (NHM) merupakan perusahaan pertambangan emas yang beroperasi di daerah Kencana Gosowong Desa Tabobo Kecamatan Malifut Kabupaten Halmahera Utara Provinsi Maluku Utara. Dari hasil evaluasi, metode Underhand Cut and Fill (UCF) dipilih karena beberapa pertimbangan ; cash flow rendah, recovery tinggi, dan lebih aman saat berhadapan dengan kondisi batuan yang buruk. Namun permasalahan yang dihadapi adalah mengenai kekuatan material backfill jenis pastefill yang digunakan untuk bertindak sebagai atap dan dinding terowongan produksi bagi para pekerja dan peralatan yang berada disekitarnya. Kajian sifat fisik dan mekanik pastefill ini dilakukan berdasarkan hasil pengujian di Laboratorium Geomekanika Puslitbang Tekmira Kementerian ESDM di Bandung. Penelitian ini dilakukan untuk mendukung kekuatan fisik dan mekanik pastefill yang digunakan untukmengisi ruang- ruang kosong pada terowongan produksi setelah pengambilan bijih emas. Hasil uji sifat fisik vulkanik tuff terlihat adanya peningkatan bobot isi dari kondisi kering ke kondisi jenuh rata-rata 0,17gr/cm3. Kadar air pun mengalami peningkatan dari kondisi natural ke kondisi jenuh rata-rata 20.82%, hal ini dikarenakan jumlah air yang masuk ke dalam pori-pori meningkat. Banyaknya kadar air asli rata-ratasebesar 23,83% dan kadar air jenuh rata-rata 44.65%, derajat kejenuhan berkisar 14.74–91.2% serta nilai porositasnya 38.12–43.94% dan angka pori rata-rata 0.7. Penggunaan pastefill untuk mengisi ruang-ruang kosong (stope) pada tambang emas bawah tanah Kencana harus dirancang dengan nilai c berkisar 0.5–2 MPa, t berkisar 0.05–0.2 MPa, kohesi (c) berkisar 0.07–0.3 MPa dan sudut gesek dalam (ϕ) berkisar300–450, sebagai persyaratan sifat mekanik untuk melakukan penambangan bijih disamping dinding pastefill harus memenuhi UCS minimal 0.5 MPa, sedangkan penambangan dibawah pastefill, UCSminimal 1.2 MPa. Blok pastefill di dalam stope yang diinterpretasi dari hasil uji diperoleh kondisi stabil untuk dilakukan penambangan dengan pastefill sebagai dinding terowongan yaitu kandungan semen 6%pada umur 14 hari, kandungan semen 12% pada umur 7 hari, dan kandungan semen 14% pada umur 3 hari. Sedangkan jika penambangan dilakukan dibawah pastefill atau sebagai atap terowongan menunjukkan kondisi tidak stabil kecuali persentase kandungan semen 14% pada umur 28 hari akan stabil, artinya penambangan dapat dilakukan pada umur pastefill antara 21-28 hari dengan diberi perkuatan. Desain sifat mekanik pastefill disesuaikan dengan rencana penambangan, jika sikluspenambangan membutuhkan waktu yang sangat cepat maka persentase semen akan dinaikkan, dan jika siklus penambangannya membutuhkan waktu yang lama, maka persentase semen akan dikurangi denganmenunggu umur pastefill mencapai kekuatan dan faktor keamanan yang dipersyaratkan untuk melakukan penambangan berikutnya, baik disamping maupun dibawahnya.

PROGRAM KESADARAN BAHAYA MERKURI DAN SIANIDA DI DAERAH LINGKAR TAMBANG: STUDI KASUS DAERAH KAO TELUK, MALIFUT DAN KAO, HALMAHERA UTARA B. Sulistijo; Chusharini Chamid; Electronita Duan; Johana Tandisalla; Razak Karim; Ruslan Umar; Nurany Nurany; Suyeti Amir; Steven Ewamony
Prosiding Temu Profesi Tahunan PERHAPI 2018: Prosiding Temu Profesi Tahunan PERHAPI
Publisher : PERHAPI

Daerah lingkar tambang adalah daerah yang sangat rentan untuk tumbuhnya pengolahan emas dengan menggunakan metode amalgamasi dan sianidasi yang diinisiasi oleh masyarakat pendatang. Oleh fungsi waktu akhirnya masyarakat lokal menguasai teknologi amalgamasi dan sianidasi. Aktifitas ini semakin marak jika bijih emas mempunyai sifat yang cocok untuk diolah dengan amalgamasi dan dilanjutkan dengan sistem sinaidasi. Tambang rakyat ini merupakan isu yang kompleks, dan sama halnya dengan yang terjadi di berbagai negara lain, umumnya orang-orang yang terlibat dalam kegiatan tambang jenis ini di Kao teluk, Malifut dan Kao kabupaten Halmahera Utara merupakan orang-orang yang memiliki tingkat pendidikan yang rendah dan tidak memiliki alternatif mata pencaharian yang lain yang lebih baik. Menjadi tanggungjawab bagi setiap individu dalam masyarakat untuk memberikan pengetahuan pada orang-orang yang terlibat dalam kegiatan tambang rakyat dan tambang skala kecil ini dalam praktik penggunaan merkuri dan sianida dengan aman. Metode ini telah berhasil dengan baik dengan melibatkan lebih dari 900 orang mulai dari anak-anak SD, SMP dan SMA yang orangtuanya/keluarganya terlibat dalam pengolahan emas, Puskemas, Remaja Gereja, Jemaat Gereja, Ibu-ibu Pengajian, Puskemas, Ibu-ibu di enclove pengolahan emas serta penambangan emas itusendiri. Terbentuknya penyuluh-penyuluh untuk pertambangan emas traditional yang mengerti adat dan bahasa lokal sangat penting dan lebih efektif jika didukung bahan-bahan penyuluhan yang kominikatif yang mengacu kepada adat dan kegiatan local.

K KAJIAN KARAKTERISTIK BATUAN BEKU ANDESIT SEBAGAI BAHAN BANGUNAN DI DAERAH SULAMADAHA KECAMATAN TERNATE BARAT KOTA TERNATE Razak - Karim; Sahdan Suriadi
DINTEK Vol 12 No 2 (2019): Dintek Vol 12 No. 2 September 2019
Publisher : Fakultas Teknik UMMU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1145.24 KB)

The potential of andesite igneous rock caused by volcanic activity, makes the City of Ternate has the potential of rock and sand extraction which is very abundant. Therefore this research was conducted to determine the characteristics of andesite rocks based on the results of testing physical and mechanical properties in the Laboratory, and how to determine the feasibility and non-feasibility of the availability of these andesite rocks as building construction raw materials in accordance with Standards. The study was carried out in the Sulamadaha area of Ternate City, where testing of rock samples was carried out at the SABO Laboratory, Center of Water Resources Research and Development in Yogyakarta and testing of other rock aggregate samples was carried out in the Laboratory of Structur and Materials in Civil Engineering Department, Khairun University in Ternate. Description of rocks has a fine solid gray color, afanitic textured crystalline subhedral, with mineral compositions contained in them are orthoclase feldspard, plagioclase, and quartz. The average compressive strength of andesite rocks from four samples is 1.357,015 kg/cm², for the test results the maximum shear resistance is 29,85%, while the average test results of water absorption ability in andesite rocks are 3,67 %. So it was concluded that andesite igneous rocks of Sulamadaha area, West Ternate District were feasible and fulfilled the requirements and quality of natural stone for building materials in accordance with Indonesian Industrial Standards (SII-0378-80).

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