Genesa of marble in Trenggalek

1. The existence of the limestone that is happening because of the existence of the limestone that came from the Campurdarat Formation and the Member of the Wonosari Formation that be aged Miosen.

2. Because of the existence of the influence of the pressure (metamorphism because of the influence of the pressure) that is happening because of the limestone unit was in the underside from the Campurdarat Formation afterwards was dealt with by the other rock unit that is by from the Jalen Formation, Formasi Wuni, Formasi Nampol and the Wonosari Formation

3. Because of the influence of the temperature (metamorphism because of the influence of the temperature) that is happening because of the limestone intrusion by the igneous rock and because of the structure of geology (fault/fracture) intensively

Read More

Kaolin

Kaolin merupakan masa batuan yang tersusun dari material lempung dengan kandungan besi yang rendah, dan umumnya berwarna putih atau agak keputihan. Kaolin mempunyai komposisi hidrous alumunium silikat (2H2O.Al2O3.2SiO2), dengan disertai beberapa mineral penyerta.

Proses pembentukan kaolin (kaolinisasi) dapat terjadi melalui proses pelapukan dan proses hidrotermal alterasi pada batuan beku felspartik, mineral-mineral potas aluminium silka dan feldspar diubah menjadi kaolin. Endapan kaolin ada dua macam, yaitu: endapan residual dan sedimentasi.

Mineral yang termasuk dalam kelompok kaolin adalah kaolinit, nakrit, dikrit, dan halloysit (Al2(OH)4SiO5.2H2O), yang mempunyai kandungan air lebih besar dan umumnya membentuk endapan tersendiri.

Sifat-sifat mineral kaolin antara lain, yaitu: kekerasan 2 – 2,5, berat jenis 2,6 – 2,63, plastis, mempunyai daya hantar panas dan listrik yang rendah, serta pH bervariasi.

Potensi dan cadangan kaolin yang besar di Indonesia terdapat di Kalimantan Barat, Kalimantan Selatan, dan Pulau Bangka dan Belitung, serta potensi lainnya tersebar di Pulau Sumatera, Pulau Jawa, dan Sulawesi Utara. Read More

Limestone

The limestone was the sediment rock, happened because organically, in a manner mechanics and in a manner chemistry. Some limestones in the wild happened organically, that is coming from the sedimentation foram/coral house and the snail, foraminifera or the gap or came from the framework of the coral animal/the shellfish.

The limestone could be hard and solid, scrutinised also could be the reverse, Apart From that was firm was encountered also that poreus.

The limestone was utilised by the sector of the industry, the construction and agriculture in part for the building materials, the building stone, the material of the highway stabiliser, plastering for agriculture, the ceramic material, the glasses industry, the cement industry, the production of carbide, the smelter and the steel, the whitening material, the industry and rubber of pulp paper, the production of calcium hydroxide, the water cleaner, the sedimentation of the metal ore non-ferous, the sugar industry. The potential for the limestone in Indonesia was very big, spread equitable all over Indonesia, with the pattern of the mining generally was carried out in a manner the open-cut mine. Read More