ECONOMIC GEOLOGY
MINERAL RESOURCES OF THE PHILIPPINES
1. An isolated ore body, or an enrichment of limited vertical and horizontal extent in a massive, bedded or
vein deposit.
a. Massive b. Tabular c. Lenticular or Pocket d. Stringer.
2. Dome salt is classified as:
a. Placer deposit b. Massive deposit c. Bedded deposit d. Vein type
3. Sediments and other accumulations of solid particles produced by the mechanical and/or chemical
disintegration of rocks, and usually having a low cohesive strength and very low compressive strength.
a. Detritus b. colloids c. humus d. loam
4. The ferruginous deposit filling the upper part of some mineral veins forming a superficial cover over
masses of pyrite. It consists mainly of hydrated iron oxide and has resulted from the removal of sulfur as
well as the copper or other sulfides originally present.
a. Country rock b. Gossan c. Limonite d. Ore shoot
5. It is not a mineral but an aggregate of minerals and other colloidal substances.
a. Quicksand b. Diatoms c. Clay d. Talus
6. A colorless, translucent to transparent variety that occurs mainly in low temperature veins in gneisses
and schists.
a. Sienna b. Adularia c. Oligoclase d. Sanidine
7. The top of terminal edge of the vein on the surface or its nearest point to the surface.
a. Aureole b. Tip c. Acme d. Apex
8. Major structural and sedimentation unit of the crust of the earth. They consist of elongated basins,
which become filled with very great thickness.
a. Geosyncline b. Eugeosyncline c. Geanticline d. Lithosphere
9. The large scale deformation of the earth’s crust that produces continents, ocean basins, mountain
ranges, etc.
a. Tectonism b. Volcanism c. Geosynclinal formation d. Diastrophism
10. The coarse sandstone with very angular fragments. It was probably deposited at the mouth of fast
flowing river.
a. Graywacke b. Grit c. Quartzite d. Arkose
11. The smooth, curved fracture resembling the interior surface of a shell. This is most commonly
observed in such substances as glass and quartz.
a. Conchoidal Fracture c. Hackly fracture
b. Fibrous and splintery fracture d. Uneven or Irregular fracture.
12. The term used to describe the tenacity of minerals in which they can be cut into thin shavings with a
knife.
a. Brittle b. Malleable c. Sectile d. Ductile
13. It is a mass formed by deposition of material about a nucleus. Some of these are roughly spherical,
whereas others assume a great variety of shapes.
a. Geode b. Concretion c. Stalactite d. Colloform
14. Which of the following mineral habits and aggregates best describe the appearance of Mica?
a. Radiating and globular c. Fibrous and reticulated
b. Mamillary and botryoidal d. Foliated and lamellar
15. A most common mineral in the earth’s crust.
a. Water b. Feldspar c. Quartz d. Gold
16. Today’s largest diamond producer worldwide.
a. Western Mining Corp. b. Placer Dome, Inc. c. De Beers d. Newmont
17. A term used to describe a mineral that does not vary in color because of certain light-absorbing atoms
that form an essential part of its make-up.
a. Opaque b. Transparent c. Idiochromatic d. Monochromatic
18. Fragments in sedimentary rocks that originally formed part of the parent rocks.
a. Detritals b. Clasts c. Fragments d. Inclusion

19. A rock that forms from fossilized remains of plants and animals.
a. Petrified wood c. fossilized rock
b. Chemical sedimentary rock d. metamorphic rock
20. The micro-quantitative analysis of soil and water samples.
a. Radiometric measurements c. X-ray analysis
b. Geochemistry d. Spectrographic analysis
21. It applies knowledge of genesis and occurrence of mineral deposits, structural mapping and
mineralogical and petrography analyses to discover, define, and appraise mineral prospects.
a. Geological prospecting c. Appraisal
b. Assessment d. Investigation
22. A basic drainage pattern forming branching like trees.
a. Trellis c. Dendritic
b. Radial d. Rectangular
23. A basic drainage pattern forming ring-like tributaries intercepting radial streams.
a. Annular b. Rectangular c. Parallel d. Trellis
24. A mineral deposit of tabular form lying horizontally or sub-horizontally and is commonly parallel to
stratification of the enclosing rocks.
a. Porphyry deposit b. Massive deposit c. Bedded deposit d. Coal seam
25. A mineralized zone having a more or less regular development in length, width, and depth to give it a
tabular form and commonly inclined at a considerable angle to the horizontal.
a. Bonanza b. Vein c. Dike d. Gossan
26. Siliceous deposit of a sedimentary nature whose main constituent is redistributed silica.
a. Siliceous ore b. Silica sand c. Slag d. Chert
27. Infilling of Vesicles is called:
a. Veinlet b. Inquartz filling c. Amygdaloidal d. Karts
28. Rock riddled with air bubbles is termed;
a. Spongy b. Porous c. Vesicular d. Pumiceous
29. It means fragmentary and fractured appearance of constituents.
a. Brecciaed b. Clastic c. Mosaic d. Jagged
30. Chemical formula for orthoclase:
a. [KAl2(AlSi3O10)OH] b. NaAlSi3O8 c. KalSi3O8 d. CaAl2Si2O8
31. The chronological order in the sequence of mineral deposition.
a. Zoning b. Paragenesis c. Sorting d. Gradation
32. A method of discovery, normally limited to visual examination or either the exposure (outcrop) of the
deposit of the loose fragments (floats) that have weathered away from the outcrop.
a. Direct b. Indirect c. Grasshopper d. Surface
33. A low-magnesium limestone containing clay.
a. Lime b. Portland cement c. cement rock d. Phosphate rock
34. It is a large and well-shaped crystal.
a. Geode b. Phenocryst c. Quartz d. Pegmatite
35. The solid petroleum that occurs as a component of shale.
a. Tar b. Kerosene c. Kerogene d. Coal
36. It is a liquid, very viscous hydrocarbon not extractable from oil wells.
a. Petroleum b. Kerosene c. Crude oil d. Tar
37. These deposits are formed in the zone adjacent to magma with soluble or replaceable rocks.
a. Contact-metamorphic deposits c. Pegmatite deposits
b. Sedimentary enriched deposits d. Replacement deposits
38. Any known body of mineral occurrence with a potential to become an ore body worthwhile mining.
a. Mineral deposit b. Prospect c. Mineral property d. Mineral source
39. Other name of metamorphogenetic type of massive copper sulfide deposit.
a. Volcano-exhalative stratiform type c. Besshi
b. Contact Metasomatic d. Keiko
40. A massive type of copper deposit that is tabular occurs in fractures and in a matrix of tectonic breccia.
a. Hydrothermal vein b. Contact metasomatic c. Metamorphogenic d. Porphyry

41. A reserve division on which sufficient technical and economic studies have been carried out to
demonstrate that it can justify extraction at the time of the determination and under specified economic
conditions.
a.Minable reserve b.Measured reserve c. Indicated reserve d. Proven ore reserve
42. A concentration of naturally occurring solid, liquid, or gaseous materials in or on the earth’s crust in
such a form that economic extraction of one or more commodities is currently or potentially feasible.
a. Reserve b. Mineral Potential c. Resource d. Mineral deposit
43. Philippine pioneer in open pit mining of a vein type deposit.
a. BC-Benguet Antamok Gold Operation c. Surigao Consolidated (Siana Mine)
b. ACMDC-Masbate Gold Operation d. Marcopper Mining Corporation
44. The gold largest producer in the Philippines nowadays.
a. Manila Mining Corporation c. Benguet Corporation (BAGO)
b. Philex Mining Corporation (Padcal) d. Philex Gold Philippines (Palawan)
45. The intermediate equivalent of basalt and gabbro.
a. Dacite b. Serpentinite c. Dunite d. Diabase
46. It is the accumulated excreta and remains of birds and bats. It is an important source of phosphorous
and nitrogen.
a. Dolomite b. Guano c. Peat d. Compost