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"The intrusive rocks of Gunung Parang and Gunung Bongkok appear to be boss shape. The intrusion lie physiographically at the Bogor zone, Purwakarta area, West Java. Petrographic features show that the rocks have good porphyritic textures, and primary minerals of plagioclase, pyroxene, and hornblende as phenocryst are in groundmass made of crystallites plagioclase. This ranges from calcic andesine, and subordinate sodic to calcic labradorite, especially in the intrusive rocks of Gunung Bongkok. Chemical analyses reveal that the parent magma of these rocks is high-alumina basalt derived from olivine tholeiites fractionation at the depth of 44 km and the temperature 1066 degree Celcius while the depth of parent magma is calculated about 175 km to the depth of the undergoing Benioff zone."

"[ABSTRAKPertambangan mineral dan batuan merupakan salah satu sektor strategis dalam perekonomian dunia. Nilai guna yang tinggi serta diharuskannya suatu perusahaan tambang untuk menetap dalan jangka waktu yang lama di dalam wilayah suatu negara menjadikan sektor ini menjadi sangat strategis baik secara ekonomi maupun politik. Sektor pertambangan mineral dan batuan seperti layaknya pertambangan migas, umumnya masih dikuasai oleh MNCs dan perusahaan pertambangan dari negara maju, sementara sumber daya mineral dan batuan mayoritas berada pada negara berkembang yang miskin teknologi. Hal ini menciptakan suatu kondisi dimana negara berkembang sering merasa dirugikan dengan kondisi dimana mereka hanya dapat memproduksi barang tambang mentah dan diharuskan membeli kembali hasil olahan dari barang tambang mentah yang berasal dari negara mereka. Hal ini pula yang membuat banyak negara berkembang mengeluarkan kebijakan yang bercorak resource nationalism guna mengejar kepentingan ekonomi maupun kepentingan politik.Indonesia merupakan salah satu negara penghasil komoditas tambang mineral dan batuan yang cukup besar. Sedikitnya dua puluh komoditas tambang mineral dan batuan diproduksi oleh Indonesia. Namun sebagaimana negara berkembang lain, sektor pertambangan mineral dan Batuan Indonesia masih didominasi oleh MNCs dan perusahaan pertambangan Asing. Hal yang mengejutkan kemudian dilakukan oleh Pemerintah Indonesia dimana pada periode tahun 2009 hingga tahun 2014, pemerintah Indonesia mengeluarkan kebijakan yang bercorak resource nationalism. Pergeseran kebijakan ini menjadi suatu hal yang menarik dimana sebelumnya kebijakan di sektor tersebut cenderung bercorak liberalis. Penelitian ini bertujuan untuk mengetahui penyebab dilakukannya pergeseran kebijakan di sektor pertambangan mineral dan batuan Indonesia menuju penerapan prinsip-prinsip resource nationalism pada periode tersebut.

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ABSTARCTMineral and ores mining is one of the most strategic sectors in world economy. High value of usage and the obligation of the mining companies to stay in other country's sovereign territory for a long period of time makes this sector very strategic economically and politically. Mineral and ores mining just like oil and gas mining, is usually dominated by MNCs and mining companies from the developed countries, while the mineral and ores resources is often located in developing countries that are lacking in technology to exploit it. This creates condition where the developing countries often feels at disadvantages, because they can only produce the raw materials, and in return they have to purchase the processed products which originally made from the raw materials from their own countries. This also causes many developing countries create policies that are associated with resource nationalism to pursue economic ends and also political ends.Indonesia is one of the biggest mineral and ores commodities producing countries. At least twenty kind of mineral and ores commodities are produced by Indonesia. However, just like many other developing countries, mineral and ores mining sector in Indonesia is still dominated by MNCs and foreign mining companies. In the period between 2009 and 2014, Indonesian government created some shocking policies in their mineral and ores mining sector that associated with resource nationalism. This political shift towards more resource nationalist policies is interesting to observe because previously mineral and ores mining policies in Indonesia is considered to be more liberal. This research aims to analyze what causes the shift on indonesian mineral and ores mining sector towards resource nationalism on that period;Mineral and ores mining is one of the most strategic sectors in world economy. High value of usage and the obligation of the mining companies to stay in other country's sovereign territory for a long period of time makes this sector very strategic economically and politically. Mineral and ores mining just like oil and gas mining, is usually dominated by MNCs and mining companies from the developed countries, while the mineral and ores resources is often located in developing countries that are lacking in technology to exploit it. This creates condition where the developing countries often feels at disadvantages, because they can only produce the raw materials, and in return they have to purchase the processed products which originally made from the raw materials from their own countries. This also causes many developing countries create policies that are associated with resource nationalism to pursue economic ends and also political ends.Indonesia is one of the biggest mineral and ores commodities producing countries. At least twenty kind of mineral and ores commodities are produced by Indonesia. However, just like many other developing countries, mineral and ores mining sector in Indonesia is still dominated by MNCs and foreign mining companies. In the period between 2009 and 2014, Indonesian government created some shocking policies in their mineral and ores mining sector that associated with resource nationalism. This political shift towards more resource nationalist policies is interesting to observe because previously mineral and ores mining policies in Indonesia is considered to be more liberal. This research aims to analyze what causes the shift on indonesian mineral and ores mining sector towards resource nationalism on that period, Mineral and ores mining is one of the most strategic sectors in world economy. High value of usage and the obligation of the mining companies to stay in other country's sovereign territory for a long period of time makes this sector very strategic economically and politically. Mineral and ores mining just like oil and gas mining, is usually dominated by MNCs and mining companies from the developed countries, while the mineral and ores resources is often located in developing countries that are lacking in technology to exploit it. This creates condition where the developing countries often feels at disadvantages, because they can only produce the raw materials, and in return they have to purchase the processed products which originally made from the raw materials from their own countries. This also causes many developing countries create policies that are associated with resource nationalism to pursue economic ends and also political ends.Indonesia is one of the biggest mineral and ores commodities producing countries. At least twenty kind of mineral and ores commodities are produced by Indonesia. However, just like many other developing countries, mineral and ores mining sector in Indonesia is still dominated by MNCs and foreign mining companies. In the period between 2009 and 2014, Indonesian government created some shocking policies in their mineral and ores mining sector that associated with resource nationalism. This political shift towards more resource nationalist policies is interesting to observe because previously mineral and ores mining policies in Indonesia is considered to be more liberal. This research aims to analyze what causes the shift on indonesian mineral and ores mining sector towards resource nationalism on that period]"

"Evaluasi terhadap pengusahaan pertambangan hatuhara arialab untuk mengetahui perkembangan penyelenggaraan usaha pertambangan uatubara di Indonesia. Hal ini dilakukan guna mendapatkan gambaran atas pasang-surutnya industri pertambangan batubara dalam rangka pelaksanaan Otonomi Daerah.Pelaksanaan Otonomi Daerah akan memberikan kewenangan yang lebih luas kepada Pemerintah Kabupaten/Kota, yang lebih terbatas kepada Pemerintah Propinsi dan Pemerintah Pusat. Disini terjadi perpindahan kewenangan yang dulunya merupakan kewenangan Pemerintah Pusat bergeser menjadi kewenangan Pemerintah Daerah dengan segala konsekuensinya.Penelitian akan dilakukan dengan tujuan untuk mengetahui perkembangan usaha pertambangan batubara pada saat ini dibandingkan dengan pada saat sebelurn pelaksanaan otonomi. Kemudian mengkaji guna mendapatkan snafu strategi didalam pengelolaan pengusahaan pertambangan batubara yang tepat agar adanya pergeseran paradigma dari sentralistik ke desentralistik tidak sampai mengganggu kelangsungan investasi pada sub sektor pertambangan batubara.Kajian dilakukan dengan metode Analytical Hierarchy Process (AHP). Data-data didapat dengan cara studi literatur, dan kuesioner serta diskusi. Kemudian membangun hirarki yang tersusun dari empat level terdiri ats tujuan. faktor/kriteria, sub faktor/kriteria serta alternatif.

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The evaluation on the coal mining business is to identify the development of the coal mining business in Indonesia. The evaluation is carried out to get u description on the up-down of the coal mining industries with connection with the Local Autonomy.The enactment of local autonomy will give more authorities to the regency and municipality government, and less authorities to the provincial and central government. There is a shift of the authorities from the central government to local governments with all its consequences.The objective of this research is to identify the development of coal mining business at present compared to that of before the enactment of the local autonomy.A study is carried to formulate a proper strategy in coal mining b'.lsiness management so as to achieve a new paradigm from centralistic to decentralistic in order not to hinder the sustainability of the investment in coal mining sub-sector.The study is carried out under the Analytical Hierarchy Process (Al-IP). The data is collected by the literature study, questionnaires and discussion. A structured hierarchy of four levels consisting of objectives, factors/criteria, subfactor/criteria and alternatives is formulated."

"Separation and purification of yttrium from several rare earth elements available in rare earth mineral xenotime employing combined separation methods. In this study, rare earth mixtures and reagent grade synthetic materials were used instead of actual origin xenotime mineral samples. The concentration ration of each rare earth in the mixture was proportional to that of the rare earth mineral xenotime found on Bangka Island. Crystals of yytrium with a purity of 99,9% were obtained which indicates a successful separation of yttrium from the rare earth elements."

"This paper attempts to clarify the position of geological and mining conditions at Ombilin in comparison with those in Australia and the UK by examining both the technical strategy and its efficiency. A summary of this review is made to facilitate judgments on long wall layouts and strata control matters chosen during the stage of mine planning and design for purpose of the underground coal mine development in Indonesia."

"Over the years, explosives have been developed of various types and with special techniques. The situation is changing everyday; better, safer products are on the market with improved procedures for use. Simple common points which are often overlooked are stressed in this paper. Both fragmentation and safety can be improved by following proper procedures in loading boreholes. Proper loading procedures such as primer location, borerehole sealing, decking, and stemming are presented. Discussion follows on the use of each procedure in surface coal mines, open-pit, and quarries."

"A potential coal deposit has been identified during detailed coal exploration campaign carried out by the Directorate General of Mines coordinating with the NEDO in Napal, Central Sumatera. Eight coal seams were found in the Upper Miocene formation, with horizontal dips. Considering the fact, a big open pit coal mining operation is possible to be planned in Napal."

"The mineral content of Indonesian coal is typically low with the average of 5.2%. Pyrite occur in most coals but in areas currently being mined are low. Some of the Pasir and Berau coals in East Kalimantan have moderate to high sulphur content in some plies and this indicates some marine influence."