soil & mineral resources

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SOIL RESOURCES

SOIL & MINERAL RESOURCESSoilWeatheringFormation of soil from rocksFactors acting together on rocks to form soilMineralsProperties of MineralsMINERAL RESOURCES IN THE PHILIPPINES

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SOIL RESOURCESFormation of soil from rocksFactors acting together on rocks to form soil

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SOIL--is formed when rocks and other materials near the Earths surface are broken down by a number of processes collectively called weathering.

WEATHERINGIt is the process by which rocks are chemically altered or physically broken down into fragments at or near Earths surface.Two Forms:Mechanical Weathering the process of physically breaking rock into smaller fragment.Chemical Weathering a process in which rock is broken down by chemical reactions.

SOIL FORMATION

When a piece of rock is exposed to the sun, its outer part expands.

SOIL FORMATION

2. On cooling, at night time, the outer part of the rock contracts or shrink.

SOIL FORMATION

3. Once broken down, water enters the cracks causing some minerals to dissolve.

SOIL FORMATION

4. Air also enters the cracks, and oxygen in the air combines with some elements. Once soft and broken, bacteria and small plants start to grow in the cracks of the rock.

FACTORS ACTING TOGETHER ON ROCKS TO FORM SOIL

CLIMATE expressed as both temperature and rainfall effects, is often considered the most powerful soil-forming factor.

A. Temperature controls how fast chemical reactions occur.Mature soils have more silt and clay on or near the surface.

FACTORS ACTING TOGETHER ON ROCKS TO FORM SOIL

B. RainfallWater directly affects the movement of soluble soil nutrients from the top soil to deep under the ground (leaching).Acidic Rainwater may also contribute to the loss of minerals in soil resulting in low field

MINERAL RESOURCES

MINERALS--Are naturally occurring, nonliving, solid with a definite structure and composition.

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PROPERTIES OF MINERALSLuster is the way in which its surface reflects light.

a. Metallic generally opaque and exhibit a resplendent shine similar to a polished metal

b. Non-metallic vitreous (glassy), adamantine (brilliant/diamond-like), resinous, silky, pearly, dull(earthy), greasy, etc.

PROPERTIES OF MINERALS2. HARDNESS is the resistance of a mineral to scratching.MOHS HARDNESS SCALE

PROPERTIES OF MINERALS3. COLOR depend on what element is present and abundant to a particular mineral

PROPERTIES OF MINERALS4. STREAK the color of minerals in its powder form.

PROPERTIES OF MINERALS5. Fracture minerals that break with rough or jagged edger.

PROPERTIES OF MINERALS6. CLEAVAGE way the mineral breaks along flat smooth surface.

PROPERTIES OF MINERALS7. DENSITY depends on its chemical composition.

Minerals made up of elements with higher atomic masses have higher densities.

PROPERTIES OF MINERALS8. MAGNETISM minerals containing iron are magnetic.

9. ACID TEST use to find out if the minerals contain CO3.

MINERAL RESOURCES IN THE PHILIPPINES

Important METALLIC MINERALS found in various parts of the PhilippinesGoldCopperIronChromiteNickelCobaltPlatinum

The Philippines has also varied NONMETALLIC RESOURCESSandGravelLimestoneMarbleClayOther quarry materials

THE PHILIPPINES IS LISTED AS THE..5th mineral country in the world3rd in Gold reserves4th in copper5th in nickel

WHY THE PHILIPPINES IS RICH IN MINERAL RESOURCES?

Pacific Ring of FireThe richness of the Philippines in terms of mineral resources is being attributed to its location in the so-called Pacific Ring of Fire.This area is associated with over 450 volcanoes and is home to approximately 75% of Worlds active Volcanoes.

Pacific Ring of Fire

Pacific Ring of Fire

WHY ARE MINERALS LOCATED WHERE THERE ARE VOLCANOES?

ASSIGNMENTGive a list of mineral deposits in the Philippines and their location, and what geologic structures (active volcanoes, faults and trenches) are found near the location of the metallic deposits?

Metal, in symbolsMetal, in wordsProvince/Region where the metals are foundGeologic Structure near the location of the metallic Deposits1.2.3.4...10.

THANK YOU!