Lembar Desk Petrografi B.beku.docx

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PRAKTIKUM MINERAL OPTIK & PETROGRAFI Acara : VIII, Petrografi Batuan Beku

Nama :

Hari/tgl : Jumat, 18 November 2016

NIM

No. Urut

:

Perbesaran objektif

:

Perbesaran okuler

:

Perbesaran total

:

Jenis mineral

:

Kenampakan Warna

:

Tekstur

:

-

Kristalinitas

:

-

Granularitas

:

-

Fabrik

:

Kenampakan Mikroskopis Mineral I Nikol sejajar a. Warna

:

b. Pleokroisme

:

c. Belahan

:

d. Pecahan

:

e. Indeks bias

:

f. Relief

:

g. Ukuran Mineral

:

Nikol silang a. Warna interferensi

:

b. Bias rangkap

:

c. Orientasi optik

:

d. Sudut pemadaman

:

e. Kembaran

:

: F 121 14

Gambar Mineral

Nikol Sejajar

Nikol Silang

Mineral II Nikol sejajar h. Warna

:

i. Pleokroisme

:

j. Belahan

:

k. Pecahan

:

l. Indeks bias

:

m. Relief

:

n. Ukuran Mineral

:

Nikol silang f. Warna interferensi

:

g. Bias rangkap

:

h. Orientasi optik

:

i. Sudut pemadaman

:

j. Kembaran

:

Gambar Mineral

Nikol Sejajar

Nikol Silang

Persentase Mineral : Mineral

I (%)

TOTAL

Nama Batuan : Petrogenesa

:

II (%)

III (%)

% Rata-rata

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