Karakteristik Urat Kubang Cicau dan Ciguha Berdasarkan Data Kemajuan Muka Tambang.
DAFTAR ISI
Halaman
SARI................................................................................................................. iii
ABSTRACT ..................................................................................................... iv
KATA PENGANTAR ..................................................................................... v
DAFTAR ISI .................................................................................................... viii
DAFTAR TABEL ............................................................................................ xii
DAFTAR GAMBAR ....................................................................................... xiii
BAB I
PENDAHULUAN .......................................................................... 1
1.1 Latar Belakang Penelitian ...................................................................... 1
1.2 Pembatasan Masalah .............................................................................. 2
1.3 Maksud dan Tujuan Penelitian ............................................................... 2
1.4 Data dan Metoda Penelitian .................................................................... 3
1.5 Lokasi dan Kesampaian Daerah ................................................................ 3
1.6 Waktu Penelitian ....................................................................................... 4
BAB II
TINJAUAN PUSTAKA ............................................................... 5
2.1 Geologi Regional Daerah Pongkor ....................................................... 5
2.1.1 Morfologi ....................................................................................... 6
2.1.2 Statigrafi ........................................................................................ 6
2.1.3 Struktur Geologi ........................................................................... 10
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2.2 Alterasi Hidrotermal ............................................................................. 11
2.3 Mineralisasi ........................................................................................... 18
2.4 Tekstur Vein Kuarsa pada Zona Epitermal ........................................... 22
2.4.1 Klasifikasi Tekstur Kuarsa ............................................................ 22
2.4.1.1 Primary Growth Textures ................................................... 22
2.4.1.2 Recrystallisation Textures .................................................. 24
2.4.1.3 Replacement Textures ........................................................ 25
2.4.2 Asosiasi Mineral............................................................................ 26
BAB III METODE PENELITIAN ............................................................ 29
3.1 Objek Penelitian ................................................................................... 29
3.2 Peralatan dan Data ............................................................................... 29
3.2.1 Data ............................................................................................... 29
3.2.2 Peralatan Lapangan....................................................................... 30
3.2.3 Peralatan Laboratorium ................................................................. 30
3.3 Tahap – Tahap Penelitian .................................................................... 31
3.3.1 Tahap Persiapan ............................................................................. 31
3.3.2 Tahap Pengumpulan dan Pengolahan Data.................................... 32
3.3.2.1 Tahap Lapangan ..................................................................... 32
3.3.2.2 Tahap Penelitian Laboratorium.............................................. 32
3.3.2.2.1 Analisis Petrografi ........................................................... 32
3.3.2.2.2 Analisisis Mineragrafi .................................................... 34
3.3.3 Tahap Penyusunan Laporan ........................................................... 34
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BAB IV HASIL PENELITIAN…………………………………………… 36
4.1 Urat Giguha Level 500 ......................................................................... 38
4.1.1 Pengamatan Lapangan .................................................................. 38
4.1.1.1 CGB ke Selatan Ramp Down................................................ 38
4.1.1.2 SD Vein Tengah 2 ................................................................. 38
4.1.1.3 Blok 2 Flat Back CGT 3 ke Utara slice 2 ............................... 40
4.1.1.4 SD Vein Timur Blok 5 .......................................................... 40
4.1.2 Alterasi Urat Ciguha Level 500 .................................................... 41
4.1.3 Mineralisasi Urat Ciguha Level 500 ............................................. 47
4.1.4 Tekstur Kuarsa Urat Ciguha Level 500 ........................................ 49
4.1.5 Perkiraan Zona Mineralisasi Urat Ciguha Level 500 ................... 51
4.2 Urat Kubang Cicau Level 500.............................................................. 53
4.2.1 Pengamatan Lapangan .................................................................. 53
4.2.1.1 SD Blok 2 Vein D ( x-cut 1D ke utara)................................. 53
4.2.1.2 SD Blok 2U Vein 2D ( X-C 2A selatan ) .................................. 53
4.2.1.3 SD Blok 3 U Vein D FW (dari x/c 2A ke utara) .......................... 55
4.2.1.4 SD Stope 8 MW 7 DARI X-C 543 ............................................ 55
4.2.1.5 SD Blok 4 U Vein D (dari x/c 2A ke utara) .............................. 57
4.2.2 Alterasi Urat Kubang Cicau Level 500 ....................................... 57
4.2.3 Mineralisasi Urat Kubang Cicau Level 500 ................................ 61
4.2.4 Tekstur Kuarsa Urat Kubang Cicau Level 500............................ 63
4.2.5 Perkiraan Zona Mineralisasi Urat Kubang Cicau Level 500 ....... 66
4.3 Perbandingan Urat Giguha dengan Kubang Cicau .......................... 68
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BAB V KESIMPULAN………………………………………………….… 70
DAFTAR PUSTAKA…………………………………………………..……. 72
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Halaman
SARI................................................................................................................. iii
ABSTRACT ..................................................................................................... iv
KATA PENGANTAR ..................................................................................... v
DAFTAR ISI .................................................................................................... viii
DAFTAR TABEL ............................................................................................ xii
DAFTAR GAMBAR ....................................................................................... xiii
BAB I
PENDAHULUAN .......................................................................... 1
1.1 Latar Belakang Penelitian ...................................................................... 1
1.2 Pembatasan Masalah .............................................................................. 2
1.3 Maksud dan Tujuan Penelitian ............................................................... 2
1.4 Data dan Metoda Penelitian .................................................................... 3
1.5 Lokasi dan Kesampaian Daerah ................................................................ 3
1.6 Waktu Penelitian ....................................................................................... 4
BAB II
TINJAUAN PUSTAKA ............................................................... 5
2.1 Geologi Regional Daerah Pongkor ....................................................... 5
2.1.1 Morfologi ....................................................................................... 6
2.1.2 Statigrafi ........................................................................................ 6
2.1.3 Struktur Geologi ........................................................................... 10
viii
2.2 Alterasi Hidrotermal ............................................................................. 11
2.3 Mineralisasi ........................................................................................... 18
2.4 Tekstur Vein Kuarsa pada Zona Epitermal ........................................... 22
2.4.1 Klasifikasi Tekstur Kuarsa ............................................................ 22
2.4.1.1 Primary Growth Textures ................................................... 22
2.4.1.2 Recrystallisation Textures .................................................. 24
2.4.1.3 Replacement Textures ........................................................ 25
2.4.2 Asosiasi Mineral............................................................................ 26
BAB III METODE PENELITIAN ............................................................ 29
3.1 Objek Penelitian ................................................................................... 29
3.2 Peralatan dan Data ............................................................................... 29
3.2.1 Data ............................................................................................... 29
3.2.2 Peralatan Lapangan....................................................................... 30
3.2.3 Peralatan Laboratorium ................................................................. 30
3.3 Tahap – Tahap Penelitian .................................................................... 31
3.3.1 Tahap Persiapan ............................................................................. 31
3.3.2 Tahap Pengumpulan dan Pengolahan Data.................................... 32
3.3.2.1 Tahap Lapangan ..................................................................... 32
3.3.2.2 Tahap Penelitian Laboratorium.............................................. 32
3.3.2.2.1 Analisis Petrografi ........................................................... 32
3.3.2.2.2 Analisisis Mineragrafi .................................................... 34
3.3.3 Tahap Penyusunan Laporan ........................................................... 34
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BAB IV HASIL PENELITIAN…………………………………………… 36
4.1 Urat Giguha Level 500 ......................................................................... 38
4.1.1 Pengamatan Lapangan .................................................................. 38
4.1.1.1 CGB ke Selatan Ramp Down................................................ 38
4.1.1.2 SD Vein Tengah 2 ................................................................. 38
4.1.1.3 Blok 2 Flat Back CGT 3 ke Utara slice 2 ............................... 40
4.1.1.4 SD Vein Timur Blok 5 .......................................................... 40
4.1.2 Alterasi Urat Ciguha Level 500 .................................................... 41
4.1.3 Mineralisasi Urat Ciguha Level 500 ............................................. 47
4.1.4 Tekstur Kuarsa Urat Ciguha Level 500 ........................................ 49
4.1.5 Perkiraan Zona Mineralisasi Urat Ciguha Level 500 ................... 51
4.2 Urat Kubang Cicau Level 500.............................................................. 53
4.2.1 Pengamatan Lapangan .................................................................. 53
4.2.1.1 SD Blok 2 Vein D ( x-cut 1D ke utara)................................. 53
4.2.1.2 SD Blok 2U Vein 2D ( X-C 2A selatan ) .................................. 53
4.2.1.3 SD Blok 3 U Vein D FW (dari x/c 2A ke utara) .......................... 55
4.2.1.4 SD Stope 8 MW 7 DARI X-C 543 ............................................ 55
4.2.1.5 SD Blok 4 U Vein D (dari x/c 2A ke utara) .............................. 57
4.2.2 Alterasi Urat Kubang Cicau Level 500 ....................................... 57
4.2.3 Mineralisasi Urat Kubang Cicau Level 500 ................................ 61
4.2.4 Tekstur Kuarsa Urat Kubang Cicau Level 500............................ 63
4.2.5 Perkiraan Zona Mineralisasi Urat Kubang Cicau Level 500 ....... 66
4.3 Perbandingan Urat Giguha dengan Kubang Cicau .......................... 68
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BAB V KESIMPULAN………………………………………………….… 70
DAFTAR PUSTAKA…………………………………………………..……. 72
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