materi kuliah teknik pertambangan ; geologi struktur semester iii sttnas yogyakarta 3. deformasi...

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DEFORMASI BATUAN &

KEKAR

Strain – Elastic, Plastic, Brittle

Tiga Ilustrasi untuk Stress

Deformasi

Tegasan

Mode rekahan

Veins

Veins

• Veins merupakan kekar terbuka

(extension

fractures yang terisi oleh mineral deposits

(mineral sekunder)

• Endapan dapat masif atau terdiri dari fibrous

• Endapan dapat masif atau terdiri dari fibrous

crystal grains seperti quartz atau calcite

• fibrous fillings berguna untuk interpretasi

deformasi erkait dengan bukaan vein

Joints – tensional, compressional, sets

Termination of individual

joints :

A. Dying out of straight joint;

B. Curving and dying out of

a joint; C. Branching and

dying out of a joint; D. Two

overlapping joints, each

curving toward a

perpendicular intersection

perpendicular intersection

with the other; E. One joint

curving toward a

perpendicular intersection

with the other; F. One joint

curving toward a parallel

intersection with another; G.

Dying out of a joint in a

series of en echelon

fractures.

Jenis sesar

Kekar akibat sesar

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