Bahan Bumi dan Proses - UKM
Transcript of Bahan Bumi dan Proses - UKM
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Bahan Bumi dan Proses
Prof Madya Dr. Wan Zuhairi Yaacob
Program Geologi
UKM
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Earth materials & processes
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Earth materials & processes• Earth materials are solid rocks and soils,
water, and the gases of the atmosphere
• Rocks and Minerals?
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Sailing stone
Messina, P., 1998, The Sliding Rocks of Racetrack Playa, Death Valley National Park, California: Physical and Spatial Influences on
Surface Processes. Published doctoral dissertation, Department of Earth and Environmental Sciences, City University of New York,
New York. University Microfilms, Incorporated, 1998.
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Geologic cycle
• Tectonic cycle
• Rock cycle
• Hydrologic cycle
• Biogeochemical cycle
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• The Grand Canyon
– Sedimentary rocks (part of rock cycle)
– Uplifted (tectonic cycle)
– Erosion (hydrologic cycle)
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Kitaran Tektonik
(Tectonic cycle)
• Tektonik : Proses geologi berskala
besar yang merubah (membentuk)
kerak bumi, menghasilkan bentuk muka
bumi seperti lautan, benua, dan gunung
ganang.
• Proses dijana oleh daya (force)
berpunca dari dalam bumi
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Tectonic cycle and environmental
geology
• Everything on planet is affected by plate
tectonics
– Producing zones of resources
• Oil trap, other minerals (gold; iron; aggregates)
– Producing earthquakes and volcanoes
– Producing / determine the properties of
rocks/soils for construction / agriculture
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Teori Hanyutan Benua
(continental drift)
Teori Tektonik keping
(Plate tectonics)
Teori Pemuaian Dasar
Lautan
Teori Bintik Panas (Hotspot)
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Kitaran tektonik
(Tectonic cycle)
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Divergent boundary
Convergent boundary
Subduction zone
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TEKTONIK KEPING
Mid ocean ridge
trench
“The ring of fire”
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Anda di sini
Zon subduksi
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Tugasan berkumpulan
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Permatang tengah lautan
(mid ocean ridges) – seismic zone
Sesar/transform faults
Kerak baru dihasilkan di sini
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The rock cycle shows the relationship among the three
families of rocks. The arrow inside the circle show
possible interruptions of the cycle
Rock cycle
Link to other sub cycles:-
Tectonic cycle – heat & energy
Biogeochemical cycle - materials
Hydrologic cycle - water
Rock cycle and tectonic cycle
-Tectonic cycle provide several
environments for rock formation-Specific rock type at each plate
boundary (CONTOH)
-Tectonic drives and maintains the
rock cycle
Rock cycle and mineral resources
-Concentrating and dispersing
materials
- CONTOH: Emas
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Slightly weathered, massive (no structure), light grey, coarse grained, very
strong, biotite, GRANITE
(i) weathered state;
(ii) structure
(iii) colour
(iv) grain size
Particle size, texture,
alteration state
(v) rock mineral strength
(vi a) mineral type
(vi) NAME
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Texture ??
Composition ??
Rate of cooling ??
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Texture ??
Composition ??
Rate of cooling ??
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Phosphate minerals
(eg. Monazite)
Fertilizers
Agriculture
Dispersed into the environment (ground, water, air)
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Kitaran hidrologi
(powered by heat from the sun)
Condensation
Cloud formation
Rain/snow
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Biogeochemical cycles• Transfer or recycling of an elements
through the atmosphere, lithosphere,
hydrosphere & biosphere
• Related to tectonic, rock and
hydrologic cycles
• Tectonic cycle
– Provide water from volcanic eruption
– heat & energy
• Rock & hydro cycle
– Transfer and storage of chemical elements
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Bahagian Geologi (major geologic cycle)Berlaku dalam bumi (deep seated process)Bermula apabila sedimentertimbus; diagenesis; metamorfisme; metasomatism; pembentukan batuan kristal
Bahagian Alam sekitar (minor geologic cycle)Bermula apabila batuan terdedahke atmosfera (luluhawa !)Angkutan: hasil luluhawadipindahkanKembali semula ke kitaran geologi(major cycle)
Biogeochemical cycle
The transfer of chemical elements through a series of storage and compartments or
reservoir (air, soil, groundwater, vegetation)
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Kitaran Geokimia (Mason & Moore, 1982)
• Pengaruh manusia terhadap kitaran
geokimia
– Gangguan berpunca dari aktiviti manusia
(selepas revolusi perindustrian)
– Beberapa penambahan unsur berlaku:
• Bahan baru hasil dari proses perindustrian
– Penambahan tidak normal dikenali sebagai
bahan pencemaran
• Cth: plumbum dari minyak petrol; SO2 dari
peleburan bijih; nitrat dari baja pertanian; etc
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Carbon cycle
2 terms:-
• Storage compartments
(kandungan C dalam
sesuatu ruang)
• Rate of transfer
(Berapa pantas kadar
pergerakan per tahun)
• C – solid; building block;
gas, weak acid
• The most critical : C stored
in atmosphere and rate of
transfer to land/ocean
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Total human input C to atm = 7billion tons/yr
7 bt/yr released; 3 bt/yr stored in atm; where another 4 gone?
Keller:
-not yet been answered
- Presumably: stored in
shallow ocean water (2bt/r)
and soil and plant (2bt/yry)
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Kuiz 1 online SPIN
• Sabtu, Januari 16hb (15 minit sahaja)
• Apakah masa paling sesuai ?:-
– Pagi (9-10 AM)
– Petang (3-4 PM)
– Malam (9-10 PM)
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TAMAT
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