Pengaruh Mineral Sekunder Sulfat Hasil Oksidasi Pirit Terhadap Nilai Total Sulfur Pada Batubara Formasi Haloq dan Serpih Karbonan Formasi Batuayau Cekungan Kutai Atas

Effect of Secondary Sulphate Mineral theresults of Oxidation Pyrite againt Value Total Sulfur In Coal Formation Haloq and carbonaceous shale Formation Batuayau On the Kutai Basin

Abstract

Four samples of coal and two samples of carbonaceous shales at the Latest Eosen age were studied
about the minerals contains relative to height of average sulphur values. The sulphur in coal Haloq
formation samples are code HBG-1102 (3,55% adb), MMH- 0504 (0,95% adb), MMH- 05021 (0,91%
adb), MDG-0703 (0,7% adb) and the sulphur in carbon shale Batuayau formation samples are code
MRH-0806 (0,35% adb) and MRH-0801 (3.25% adb). The two group of rock samples contain high
sulphur with average 1,53% (adb) in Haloq formation and 1,78% (adb) in Batuayau formation. Analysis
proximate, ultimate, and x-ray diffraction (XRD) were used for determine the coal compositions, the
value of carbon (C), hidrogen (H), oxygen (O), Nitrogen (N), and sulphur (S), and expectation of
minerals in coal. The results of XRD were showed mineral zaherite, quartz, caolinite, beidelite were
transformed from smectite, and mineral nacrite were transformed from caolinite. Melanterite and
magnesiocopiate were secondary mineral of sulphate were indicated formed from oxidation pyrite
influence. The presence of Melanterite and magnesiocopiate were indicated as caution of the highest
average sulphur value in coal and carbonaceous shale samples.