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sulfosalts Flashcards

1
Q

what is the composition of tennantite

A

copper
iron
arsenic
sulfur

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2
Q

crystal system of tennantite

A

cubic

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3
Q

composition of enargite

A

copper
arsenic
sulfur

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4
Q

crystal system of enargite

A

orthorhombic

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5
Q

jamesonite composition

A

lead
iron
antimony
sulfur

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6
Q

minor ores of antimony

A

jamesonite
bournonite

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7
Q

crystal system of jamesonite

A

monoclinic

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8
Q

composition of stephanite

A

silver antimony sulfide

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9
Q

also called as brittle or black silver ore

A

stephanite

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10
Q

crystal system of stephanite

A

orthorhombic

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11
Q

composition of pyrargyrite

A

silver
antimony
sulfur

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12
Q

also called dark ruby silver

A

pyrargyrite

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13
Q

crystal system of pyrargyrite

A

hexagonal

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14
Q

composition of bournonite

A

lead
copper
antimony

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15
Q

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

A

bournonite

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16
Q

crystal system of bournonite

A

orthorhombic

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17
Q

composition of proustite

A

silver
arsenic
silfur

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18
Q

also called light red silver ore
and dogtooth spar

A

proustite

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19
Q

composition of tetrahedrite

A

copper
iron
antimony

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20
Q

made of copper extracted from tetrahedrite

A

arabic astrolabe

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21
Q

crystal system of tetrahedrite

A

cubic

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22
Q

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

A

molucca sea plat

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23
Q

2 arcs of molucca tht are separated at least 100km

A

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

24
Q

when did the palawan mindoro geologic block rifted from asian mainland

A

late cretaceous-late eocene

25
Q

where did PMV origignated

A

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

26
Q

reresent the pre tertiary basement of ph

A

metamorphic and ophiolitic rocks

27
Q

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

A

wing crack

28
Q

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

A

horsetail fractures

29
Q

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

A

splay faults

30
Q

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

A

byerlees law

31
Q

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

A

cryolite (halide)

32
Q

ionic bond

A

halides

33
Q

apatite when formed in marine sed rock

A

phosporites

34
Q

principal ore of thorium recovered from beach economic quantities

A

monazite

35
Q

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

A

amblygonite

36
Q

how many tungstate

A

20

37
Q

2 exonomically important minerals under tungstate

A

scheelite
wolframite

38
Q

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

A

wulfenite

39
Q

nitrates

A

nitratite
niter

40
Q

chromates

A

crocoite

41
Q

vanadates

A

vanadinite

42
Q

arsenates

A

erythrite

43
Q

permits intensity of the light source to be adjusted

A

rheostat

44
Q

used to focus reticule markings

A

focusing ring

45
Q

have 2 eyepieces ine of which has an adjustable focusing ring

A

stereogrpahic microscopes

46
Q

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

A

trinocular microscopes

47
Q

distance between the objective and the sample on the stage

A

free working distance

48
Q

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

A

relief

49
Q

extinction angle of muscovite and bitote

A

<5 degrees

50
Q

muscoite biotite carbonates calcite and dolomite

A

mottle or birdseye extinction cleavage

51
Q

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

A

gridiron or scothplaid twinning

MICROLINE has this

52
Q

carlsbad twinning

A

occurs with albuge

Sanadine and orthoclase

53
Q

spindle shaped

A

precline twin

54
Q

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

A

turbidity

55
Q

form sgortly after sediment deposition

A

penecontemporaneous

for review (33 decks)

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