Electronic Theses and Dissertation

Keterdapatan mineral bijih besi khususnya hematite di Provinsi Aceh tersebar pada beberapa daerah salah satunya berada pada Daerah Lhoong Kabupaten Aceh Besar. Namun, informasi mengenai sebaran potensi mineral tersebut belum begitu rinci, seperti identifikasi mineral serta banyaknya sumberdaya yang tersedia. Daerah penelitian terletak di Kecamatan Lhoong, Kabupaten Aceh Besar, Provinsi Aceh. Penelitian ini dilakukan untuk mengetahui jumlah kadar serta volume dan tonase dari hematite pada daerah tersebut. Metode penelitian menggunakan survei geokimia teknik grab sampling dengan mengambil sampel batuan di lokasi penelitian dan kemudian dianalisis menggunakan uji laboratorium X-Ray Flourescence untuk mengetahui unsur geokimia pada sampel yang diteliti dan kemudian dilakukan perhitungan sumberdaya dari mineral hematite. Setelah sampel diuji, dari hasil perhitungan didapatkan besar volume batuan pada lokasi penelitian sebesar 123.784.963,37 m3. Serta berat jenis batuan sebesar 4,9 gram/cm3. Hasil perhitungan rata-rata kadar hematite pada sampel sebesar 5,2908% atau 52.908 ppm dan diperoleh tonase hematite sebesar 32,09 ton yang termasuk kedalam Sumberdaya Tereka. Uji statistik juga dilakukan untuk memperoleh keakuratan dalam perhitungan dengan memakai uji T didapatkan hasil distribusi kadar hematite tersebar merata diseluruh daerah pengambilan sampel, dari perhitungan statistik diperoleh hasil bahwa dengan confident level 95%, nilai x2 hitung yang didapatkan lebih kecil dari nilai x2 tabel maka, Ho diterima dengan menyatakan bahwa kadar hematite tersebar merata serta nilai interval kepercayaan Distribusi T yang dengan tonase hematite sebesar 32,09 ton dari nilai rata-rata kadar hematite 5,2908% memakai interval kepercayaan 95% berada diantara 0,188% dengan jumlah sumberdaya sebesar 1,14 ton hingga 3,85% dengan jumlah sumberdaya sebesar 23,35 ton.

Kata Kunci: Estimasi, Bijih Besi, Hematite, X-Ray Flourescence

The presence of iron ore minerals, especially hematite, in Aceh Province is spread across several areas, one of which is in the Lhoong Region, Aceh Besar Regency. However, information regarding the potential distribution of these minerals is not yet very detailed, such as mineral identification and the amount of resources available. The research area is located in Lhoong District, Aceh Besar Regency, Aceh Province. This research was carried out to determine the amount of grade, volume and tonnage of hematite in this area. The research method uses a geochemical survey using the grab sampling technique by taking rock samples at the research location and then analyzing them using the X-Ray Flourescence laboratory test to determine the geochemical elements in the samples studied and then calculating the resources of the mineral hematite. After the samples were tested, the calculation results showed that the volume of rock at the research location was 123,784,963.37 m3. And the specific gravity of the rock is 4.9 grams/cm3. The calculation results of the average hematite content in the sample were 5.2908% or 52,908 ppm and obtained a hematite tonnage of 32.09 tons which is included in the Inferred Resources. Statistical tests were also carried out to obtain accuracy in calculations using the T test. The results showed that the distribution of hematite levels was spread evenly throughout the sampling area. From statistical calculations, the results obtained were that with a confident level of 95%, the calculated x2 value obtained was smaller than the table x2 value, so, Ho is accepted by stating that the hematite content is evenly distributed and the T distribution confidence interval value with a hematite tonnage of 32.09 tons from the average hematite content value of 5.2908% using a 95% confidence interval is between 0.188% with a resource amount of 1,14 tons up to 3.85% with total resources of 23.35 tons. Keywords: Estimation, Iron Ore, Hematite, X-Ray Fluorescence