Download - ORE DEPOSITS OF MTAMORPHIC ROCK
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ORE DEPOSITS OF METAMORPHIC ROCK
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FAKTOR SUBSTANSIALSYNDEPOSITIONAL / DIAGENETIK DALAM
UMUR TERJADI MODIFIKASI TEKSTUR DAN MINERALOGI
BAGIAN OREBODY MEMUNGKINKAN MOBILISASI, MEMBERIKAN KENAMPAKAN EPIGENETIK SEPERTI CROSSCUTTING VEIN.
CONTOH : SKARN DEPOSITS
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3 TIPE METAMORFISME1. BATUAN METAMORFIK KONTAK
MEDIA PANAS2. BATUAN MTAMORFIK DINAMO SKITAR
DAERAH PATAHAN DAN KEKAR-KEKAR. MEMUNGKINKAN TERJADINYA PROSES HYDROTERMAL (BERKEMBANG DALAM ZONA DILATASI SEPANJANG PATAHAN)
3. BATUAN METAMORFIK REGIONAL.
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3 TIPE METAMORFISMEBATUAN METAMORFIK REGIONAL
MENUNJUKKAN STRUKTUR CLEAVAGE, SKISTOS, LINIASI/FOLIASI.
UMUMNYA BERASOSIASI DENGAN AKTIVITAS OROGENIK
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KARAKTERISTIK ORE DEPOSITS PADA BATUAN METAMORF
MENUNJUKKAN PERKEMBANGAN TEKSTUR METAMORF
PERUBAHAN UKURAN BUTIRPENINGKATAN PROGRADE MINERAL
LAINNYA
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PERKEMBANGAN TEKSTURELASTIS DFORMATION.
PENINGKATAN ENERGI BEBASREKRISTALISASI PERTUMMBUHAN BUTIR
PLASTIS DEFORMATION TRANSLASI/GLIDING. EX: KEL.SULPOSALT
BRITTLE DEFORMATION RUPTURING/SHEARING DAN KEDUANYA MEPERLIHATKAN CLEAVAGE. EX: GALENA
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PENINGKATAN DALAM UKURAN BUTIRJIKA TEMP>>> DALAM BUTIRAN, PROSS
DIFUSI SEPANJANG BATAS BUTIRAN AKAN TERJADI MENUNJUKKAN PERTUMBUHAN BUTIR.
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PERKEMBANGAN MINERAL BARUPada metamorfism kontak, Ex: dyke basic
metamorphosed sulfide orebodyPYRIT + CHALCOCITE CALCOPYRIT +BORNITPYRIT+CHALCOSITE+ENARGITE PYRIT + BORNIT + TENNANTITE
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SISTEM HIDROTERMAL - METAMORFISMEBanyak ore deposits (sulfida masiv) terbentuk
pada metamorfisme regional.Transport metal oleh fluida hidrotrmal terjadi
selama proses metamorfism regional.
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CONTOH OREDEPOSIT PADA BATUAN METAMORFSedimentary-hosted base metal deposits (Pb-
Zn) teroverprint oleh proses metamorfisme regional.
Fe-Pb-Zn-As-Te-Ba : fasies amfibolit metadolomit (Switzerland)
Mesotermal gold deposits: mineralisasi Au-AS-Sb-Fe berasosiasi dengan vein kuarsa-karbonat, patahan dan shear zone dalam wilayah metamorfik regional.
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TUGAS PAPERBUAT PER KELOMPOK (14 ORANG)1. KEL 1 : GOLD DEPOSITS IN METAMORPHIC TERRANE2. KEL 2 : SEDIMENTARY – HOSTED BASE METAL DEPOSITS
OVERPRINTED BY METAMORPHISM3. KEL 3 : TUNGSEN MINERALIZATION AND
METAMORPHIC REMOBILIZATION4. KEL 4 : METAMORPHISM OF Ni-Cu SULFIDES IN MAFIC –
ULTRAMAFIV INTRUSION5. KEL 5 : METAMORPHISM OF KOMATITE – HOSTED Ni-
SULFIDES DEPOSITS6. KEL 6 : SUBDUCTION-RELATD DIAMOND DEPOSIT7. KEL 7 : METAMORPHOSED MASSIVE SULFIDES ORES8. KEL 8 : SKARN9. KEL 9 : REGIONAL METAMORPHISM AND ORE
FORMATION10. KEL 10 : MESOTERMAL GOLD DEPOSITS