Transcript Mining
Review of
Geologic Processes
and Non-Renewable Resources
Sections of the Earth
Inner Core: innermost solid zone of ?? And ??
Outer core that liquid ….
Sections of the Earth
Inner Core: innermost solid zone of Iron and Ni
Outer core that liquid Iron and Nickel
(1)??? includes two main parts: Lithosphere and the
asthenosphere
Asthenosphere: lower mantle-a region of molten,
liquid-like rock.
(2)??: upper mantle solid rock also called the crust. 2
types Oceanic Crust/ Continental Crust
Mantle: includes two main parts: Lithosphere and the
asthenosphere
Asthenosphere: lower mantle-a region of molten,
liquid-like rock.
Lithosphere: upper mantle solid rock also called the
crust. 2 types Oceanic Crust/ Continental Crust
Convection Currents
Cause Plates to move at D????? plate
boundaries…how?
Rising hot magma moves to the surface of the
earth and cools then sinks…creating a current of
magma.
Mechanism for Continental Drift
Convection Currents
Cause Plates to move at DIVERGENT plate
boundaries…how?
Rising hot magma moves to the surface of the
earth and cools then sinks…creating a current of
magma.
Mechanism for Continental Drift
The 15 Main Plates of the world
3 types of Plate Boundaries
1-
2-
3-
3 types of Plate Boundaries
Transform plate Boundary
The San Andreas Fault
3 types of Convergent Plate
boundaries
Ocean to Ocean
Island of J???
Ocean to Continental
West coast of California
and S. America
Continental to Continental
H???? Mountains
3 types of Convergent Plate
boundaries
Ocean to Ocean
Island of Japan
Ocean to Continental
West coast of California
and S. America
Continental to Continental
Himalayan Mountains
Continental to Oceanic Crust and/or Ocean
to Ocean Crust make what?
Continental to Oceanic Crust and/or Ocean
to Ocean Crust make Volcanoes
Divergent Plate Boundaries
Mid-Atlantic Ridge
shows sea-floor spreading
Middle of the Red Sea
Great Rift Valley
of Africa
What are Hot spots?
A stationary pool of ??????? that reaches the
surface of the lithosphere.
The H?????? Island have a gentle curve to them
b/c of the movement of the plates to the NW
What are Hot spots?
A stationary pool of magma that reaches the
surface of the lithosphere.
The Hawaiian Island have a gentle curve to
them b/c of the movement of the plates to the
NW
Yellowstone….another Hot Spot
Earthquakes, Volcanoes, and Continental Drift
Movement of earth’s plates
1. recycles the planet’s crust over geologic time.
2. Creates volcanoes, earthquakes and mountains
3. Rocks and lava emitted from volcanoes help
produce rich soils.
C???? drift explains the current day global
distribution of plants and animals, and has allowed for
speciation.
Earthquakes, Volcanoes, and Continental Drift
Movement of earth’s plates
1. recycles the planet’s crust over geologic time.
2. Creates volcanoes, earthquakes and mountains
3. Rocks and lava emitted from volcanoes help
produce rich soils.
Continental drift explains the current day global
distribution of plants and animals, and has allowed for
speciation.
Volcanoes- 3 main types
An opening, or rupture, in a planet's surface or
crust, which allows hot magma, ash and gases to
escape from below the surface.
Shield- gentle sloping, quiet eruptions found in
Hawaii
(1)?? violent eruptions,
steep sided
Composite- violent and quiet
eruptions, not as steep as
(1)
Volcanoes- 3 main types
An opening, or rupture, in a planet's surface or
crust, which allows hot magma, ash and gases to
escape from below the surface.
Shield- gentle sloping, quiet eruptions found in
Hawaii
Cinder Cone- violent eruptions,
steep sided
Composite- violent and quiet
eruptions, not as steep as
Cinder cone
Cinder Cone
Capulin Volcano cinder cone,
New Mexico.
Shield volcanoes
Composite Volcano
Mt. Ranier, Mt. Saint Helens- Washington
Wearing Down and Building Up the
Earth’s Surface
Weathering is an
external process
that wears the
earth’s surface
down.
.
1-
2-
3-
3 types of weathering
Wearing Down and Building Up the
Earth’s Surface
Weathering is an
external process
that wears the
earth’s surface
down.
3 types of weathering
.
MINERALS, ROCKS, AND THE ROCK
CYCLE
The earth’s crust consists of solid inorganic
elements and compounds called minerals that
can sometimes be used as resources.
Fossil Fuels (coal, oil, natural gas)
Metallic Minerals (aluminum, iron, copper)
Nonmetallic Minerals (sand, gravel,
limestone).
How are Rocks, minerals and Ores
made…. THE Rock Cycle
The interaction of physical and chemical processes
that changes rocks from one type to another.
Takes
millions of
years
The slowest
of the
earth’s cyclic
processes.
Rocks
Rocks: solid combination of one or more minerals
that is part of the earth’s crust.
3 types
(1)??
formed by heat and pressure
lots of layering –foliated (slate
no layering- non-foliated (coal)
G???, m???
(2)??:
Made from other sediments
s???
(3)??
Rocks come from volanoes
Intrusive and extrusive
G????/P???
Rocks
Rocks: solid combination of one or more minerals
that is part of the earth’s crust.
3 types
Metamorphic
formed by heat and pressure
lots of layering –foliated (slate
no layering- non-foliated (coal)
Gneiss, marble
Sedimentary:
Made from other sediments
sandstone
Igneous
Rocks come from volanoes
Intrusive and extrusive
Granite/pumice
Name these compounds?
an element or inorganic cmpds. That occur
naturally with a crystalline structure.
Minerals
an element or inorganic cmpds. That occur
naturally with a crystalline structure.
Name this type of compound
Peruvian silver ----- with
Rhodochrosite
•
•
•
a rock that contains a
large enough
concentration of a
particular mineral
- the mineral is often a
metal
- can be mined and
processed to extract the
desired mineral.
ORE
Peruvian silver ORE with
Rhodochrosite
•
•
•
a rock that contains a
large enough
concentration of a
particular mineral
- the mineral is often a
metal
- can be mined and
processed to extract the
desired mineral.
How do you remove minerals and ores?
(1)?? extracts about 90% of nonfuel mineral and rock
resources and 60% of coal used in the United States.
How?
Equipment strips away the overburden of soil and rock and
discards the waste rock into piles called spoils or tailings.
The unwanted material is called the g????? and the wanted is
called the ore mineral.
Several types….
How do you remove minerals and ores?
Surface Mining extracts about 90% of nonfuel mineral
and rock resources and 60% of coal used in the United
States.
How?
1.
Equipment strips away the overburden of soil and rock and
discards the waste rock into piles called spoils or tailings.
The unwanted material is called the gangue and the wanted is
called the ore mineral.
Several types….
1. ??? Mining
Machines dig holes
and remove ores,
sand, gravel, and
stone
Toxic groundwater
can accumulate at
the bottom.
1. Open-pit Mining
Machines dig holes
and remove ores,
sand, gravel, and
stone
Toxic groundwater
can accumulate at
the bottom.
2. ???? Mining
Earth movers strips away
overburden, and giant
shovels removes mineral
deposit.
Often leaves highly
erodible hills of rubble
called spoil banks.
2. Area Strip Mining
Earth movers strips away
overburden, and giant
shovels removes mineral
deposit.
Often leaves highly
erodible hills of rubble
called spoil banks.
3. ???? Mining
Used on hilly or
mountainous terrain.
Unless the land is
restored, a wall of dirt
is left in front of a
highly erodible bank
called a highwall
3. Contour Strip Mining
Used on hilly or
mountainous terrain.
Unless the land is
restored, a wall of dirt
is left in front of a
highly erodible bank
called a highwall
4. ??? Removal
Machinery removes
the tops of
mountains to expose
coal.
The resulting waste
rock and dirt are
dumped into the
streams and valleys
below.
4. Mountaintop Removal
Machinery removes
the tops of
mountains to expose
coal.
The resulting waste
rock and dirt are
dumped into the
streams and valleys
below.
So happens to these barren lands?
What Act of 1977 requires mining companies to
restore surface mined lands by re-grading and
replanting them.
Efforts usually only partially successful and can
take decades.
So happens to these barren lands?
The Surface Mining Control and Reclamation
Act of 1977 requires mining companies to
restore surface mined lands by re-grading and
replanting them.
Efforts usually only partially successful and can
take decades.
There is also this type??? Mining
Remove coal and metal ores that are too deep to
be extracted by surface mining.
Subsurface mining disturbs less than 1/10th as
much land as surface mining and usually
produces less waste material.
It is more expensive and dangerous than surface
mining (cave-ins, explosions, fires, black lung.)
There is also Subsurface Mining
Remove coal and metal ores that are too deep to
be extracted by surface mining.
Subsurface mining disturbs less than 1/10th as
much land as surface mining and usually
produces less waste material.
It is more expensive and dangerous than surface
mining (cave-ins, explosions, fires, black lung.)
Mining harms the environment in a number of ways.
1.
2.
3.
Scarring and disrupting the land surface.
Collapse of land above underground
mines.
Mining produces ?? of all U.S. solid waste
Mining harms the environment in a number of ways.
1.
2.
3.
Scarring and disrupting the land surface.
Collapse of land above underground
mines.
Mining produces ¾ of all U.S. solid waste
Other Environmental results of mining
4. Leaching of toxic chemicals into ground or
groundwater
5. Toxin-laced mining wastes can be blown or deposited
elsewhere by wind or water erosion leads to?????
Occurs when rainwater seeping through a mine or
mine waste carries sulfuric acid to nearby streams and
groundwater.
Other Environmental results of mining
4. Leaching of toxic chemicals into ground or
groundwater
5. Toxin-laced mining wastes can be blown or deposited
elsewhere by wind or water erosion. ACID MINE
DRAINAGE
Occurs when rainwater seeping through a mine or
mine waste carries sulfuric acid to nearby streams and
groundwater.