struktur geologi
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Struktur Geologi
Bentuk-bentuk alamiah pada batuan
(beku, sedimen dan malihan)
yang diakibatkan oleh adanya gaya-gaya
tektonik lempeng
Struktur geologi pada batuan ditentukan oleh :
Sifat fisik batuan (kekerasan, berat jenis, kepadatan)
Gaya-gaya kompresi
Gaya-gaya stress dan strain
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Jenis-Jenis Struktur Geologi
Lapisan horisontal (horizontal layers)
Lapisan miring (tilting layers)
Patahan / Sesar (fault)
Perlipatan (folding)
Ketidakselarasan (unconformity)
Intrusi batuan beku (rocks intrution)
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Prinsip-Prinsip Pembentukan lapisan batuan
Prinsip Horizontality
Proses pembentukan batuan (sedimen) berlangsung secara horizontal (mendatar)
Prinsip Laterality
Proses penyebaran batuan (sedimen) berlangsung menyebar ke segala arah dalam suatu cekungan
Prinsip Superposisi
Satuan batuan (sedimen) yang berumur relatif lebih tua terletak di bawah satuan batuan yang berumur relatif lebih muda
Prinsip Potong memotong
Batuan yang memotong (intrusi batuan beku) berumur lebih muda daripada satuab batuan (sedimen, beku, malihan) yang dipotong
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Manfaat Informasi Struktur Geologi
Struktur geologi merupakan salah satu informasi
geologi yang sangat mendasar dan strategis
dalam bidang perencanaan, pemanfaatan dan
pengendalian, khususnya di bidang eksplorasi
sumber daya alam (bahan tambang, mineral,
gas dan minyak bumi), Penataan Ruang
Wilayah Provinsi, Kabupaten & Kota)serta
perencanaan konstruksi bangunan bersekala
besar (bendung air, jembatan besar, gedung
berlantai >20), PLTN, PLTA, PLTU dll. 04/10/2011 11:35
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Proses pembentukan struktur batuan
pada batuan sedimen
(struktur lapisan horisontal)
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kompresi
Gaya-gaya yang membentuk struktur geologi
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Normal Fault
Reverse Fault
Patahan normal
Macam –macam patahan
Struktur Patahan (Fault)
Patahan geser 04/10/2011 11:35
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Thrust Fault
Strike Fault
Patahan naik
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model lipatan Himalayan 04/10/2011 11:35
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Struktur intrusi
batuan beku
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Lapisan horizontal, lapisan miring dan lapisan tegak
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sumbu lipatan sinklin
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sumbu lipatan antiklin
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antiklin
sinklin
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model
antiklin
sinklin
sinklin 04/10/2011 11:35
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Pola-pola struktur lipatan
dari ketinggian
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Struktur geologi kubah (Dome)
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non conformity disconfomity
Struktur ketidakselarasan
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ketidakselarasan
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Struktur Intrusi batuan
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Struktur geologi patahan, lipatan dan ketidakselrasan
PEMANFAATAN INFORMASI STRUKTUR GEOLOGI
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Struktur geologi bawah permukaan berdasarkan data seismik 04/10/2011 11:35
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