sulfosalts

Question 1

what is the composition of tennantite

Answer 1

copper
iron
arsenic
sulfur

Question 2

crystal system of tennantite

Answer 2

cubic

Question 3

composition of enargite

Answer 3

copper
arsenic
sulfur

Question 4

crystal system of enargite

Answer 4

orthorhombic

Question 5

jamesonite composition

Answer 5

lead
iron
antimony
sulfur

Question 6

minor ores of antimony

Answer 6

jamesonite
bournonite

Question 7

crystal system of jamesonite

Answer 7

monoclinic

Question 8

composition of stephanite

Answer 8

silver antimony sulfide

Question 9

also called as brittle or black silver ore

Answer 9

stephanite

Question 10

crystal system of stephanite

Answer 10

orthorhombic

Question 11

composition of pyrargyrite

Answer 11

silver
antimony
sulfur

Question 12

also called dark ruby silver

Answer 12

pyrargyrite

Question 13

crystal system of pyrargyrite

Answer 13

hexagonal

Question 14

composition of bournonite

Answer 14

lead
copper
antimony

Question 15

has the appearance of a toothed wheel giving rise to cogwheel ore

Answer 15

bournonite

Question 16

crystal system of bournonite

Answer 16

orthorhombic

Question 17

composition of proustite

Answer 17

silver
arsenic
silfur

Question 18

also called light red silver ore
and dogtooth spar

Answer 18

proustite

Question 19

composition of tetrahedrite

Answer 19

copper
iron
antimony

Question 20

made of copper extracted from tetrahedrite

Answer 20

arabic astrolabe

Question 21

crystal system of tetrahedrite

Answer 21

cubic

Question 22

south of mindanao double verge y subduction causes convergent/collision of two corresponding active volcanic arcs a present fay example of emplacement of ophiolites by slivers developed from the curvature of the fold axis of the oceanix playe late miocene start of collision western slab dives down to deths of more than 600km which is the deepest while the easyer subducts only about 200km

Answer 22

molucca sea plat

Question 23

2 arcs of molucca tht are separated at least 100km

Answer 23

sangihe and halmahera molucca sea plate has thus an E-W dimentsion of at least 900km

Question 24

when did the palawan mindoro geologic block rifted from asian mainland

Answer 24

late cretaceous-late eocene

Question 25

where did PMV origignated

Answer 25

subequatorial regions tp its present position with the rotation and spreading sea plate during eocene to miocene

Question 26

reresent the pre tertiary basement of ph

Answer 26

metamorphic and ophiolitic rocks

Question 27

tensile fracturws at the end of shear fractures represented by one or a few tensile fractures at each end of the main fratcurw and are associated eith rapid decrease in displacmeent toward the top

Answer 27

wing crack

Question 28

tensile fractures occur iny he tip zone assymetrically areabged woth respect to the main dracture and referred to as

Answer 28

horsetail fractures

Question 29

secondary fractures in the tip zone represent a dan shaped splaying kf the main fratcurw

synthetic eith respect to hre main faily antithetic fractures occur jn the top zone kf fractures

Answer 29

splay faults

Question 30

describes the vertical oncrease in critical shear stress through the frictional upper crust

Answer 30

byerlees law

Question 31

formerly wssential to the refi ing of aluminum ores such as bauxite

Answer 31

cryolite (halide)

Question 32

ionic bond

Answer 32

halides

Question 33

apatite when formed in marine sed rock

Answer 33

phosporites

Question 34

principal ore of thorium recovered from beach economic quantities

Answer 34

monazite

Question 35

occurs in sime pegmatites and is mined as a source of lithium used in refractory glass and metallic alloys

Answer 35

amblygonite

Question 36

how many tungstate

Answer 36

20

Question 37

2 exonomically important minerals under tungstate

Answer 37

scheelite
wolframite

Question 38

molybdate mineral which is a source of molybdenum used in iron in high qual steel alloys

Answer 38

wulfenite

Question 39

nitrates

Answer 39

nitratite
niter

Question 40

chromates

Answer 40

crocoite

Question 41

vanadates

Answer 41

vanadinite

Question 42

arsenates

Answer 42

erythrite

Question 43

permits intensity of the light source to be adjusted

Answer 43

rheostat

Question 44

used to focus reticule markings

Answer 44

focusing ring

Question 45

have 2 eyepieces ine of which has an adjustable focusing ring

Answer 45

stereogrpahic microscopes

Question 46

possess a 3rd tube which a camera or computer monitor may be attached and through which photomicrographs and video imgaws may be captured

Answer 46

trinocular microscopes

Question 47

distance between the objective and the sample on the stage

Answer 47

free working distance

Question 48

difference between the refractive index of a substance and the refractive index of the mounting medium

Answer 48

relief

Question 49

extinction angle of muscovite and bitote

Answer 49

<5 degrees

Question 50

muscoite biotite carbonates calcite and dolomite

Answer 50

mottle or birdseye extinction cleavage

Question 51

twins appear as spindeled shapwd crystals intergron at a high angle giving rise to what is called

Answer 51

gridiron or scothplaid twinning

MICROLINE has this

Question 52

carlsbad twinning

Answer 52

occurs with albuge

Sanadine and orthoclase

Question 53

spindle shaped

Answer 53

precline twin

Question 54

when the tangetial force of gracity exceeds the shear strength of unconsolidated sediment that is water saturated

Answer 54

turbidity

Question 55

form sgortly after sediment deposition

Answer 55

penecontemporaneous