the age of things: sticks, stones and the universe
DESCRIPTION
The Age of Things: Sticks, Stones and the Universe. Meteorites and the Age of the Solar System. http://cfcp.uchicago.edu/~mmhedman/compton1.html. March 26, 2003 The Park Forest Meteorite. Images from Simon et al Meteoritics and Planetary Science Vol 39 (2004). - PowerPoint PPT PresentationTRANSCRIPT
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The Age of Things:Sticks, Stones and the Universe
Meteorites and the Age of the Solar System
http://cfcp.uchicago.edu/~mmhedman/compton1.html
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March 26, 2003 The Park Forest Meteorite
Images from Simon et al Meteoritics and Planetary Science Vol 39 (2004)
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Different Types of Meteorites
Iron
Stony
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Different Types of Stony Meteorites
Achondrite
Chondrite
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WARNING!
Astrophysicist talkingabout
Meteorites!
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R
R=Current amount of Radioactive Nuclei
Original amount of Radioactive Nuclei
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Potassium 40 Argon 40
electron neutrino
Potassium 40 Calcium 40
electron
neutrino
Potassium-Argon System
90%
10%
Proton Neutron
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Potassium-40 Argon-40 Calcium-40
Potassium 40 Calcium-40
The Original Rock
The Rock Today
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R
R=Current amount of Potassium-40
Original amount of Potassium-40
Half-Life of Potassium-40 is1.25 billion years
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Carbon 14 Nitrogen 14
electron
neutrino
Rubidium-87 Strontium-87
electron
neutrino
Rubidium-Strontium System Proton Neutron
Half-life = 49 Billion Years
Half-Life = 5700 Years
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Rubidium-Strontium Dating
Rubidium-87 Strontium-87
Mineral 1
Today
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Rubidium-Strontium Dating
Rubidium-87 Strontium-87
Mineral 1
Mineral 1
Today
Originally
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Rubidium-Strontium Dating
Rubidium-87 Strontium-87
Mineral 1
Mineral 1
Today
Originally
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Strontium-86Rubidium-87
Strontium-87Mineral 1
Mineral 2
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Rubidium-Strontium Dating
Rubidium-87 Strontium-87 Strontium-86
Mineral 1
Mineral 2
Today
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Rubidium-Strontium Dating
Rubidium-87 Strontium-87 Strontium-86
Mineral 1
Mineral 2
Mineral 1
Mineral 2
Today
7 billion years ago
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Rubidium-Strontium Dating
Rubidium-87 Strontium-87 Strontium-86
Mineral 1
Mineral 2
Mineral 1
Mineral 2
Today
3 billion years ago
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Rubidium-Strontium Isochron Plots
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QuickTime™ and aGIF decompressor
are needed to see this picture.
Rubidium-Strontium Isochron Plots
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Rubidium-Strontium Isochron Plots
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Str
on
tiu
m-8
7/S
tro
nti
um
-86
Rubidium-87/Strontium-86
From McSween 2000 Meteorites and Their Parent Planets
Rubidium-Strontium Ages
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Different Types of Stony Meteorites
Achondrite
Chondrite
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Dust and Gas
Chondrules, etc.
Condensation, Melting, Evaporation
Aggregation
“Chondritic” Objects
Melting, Differentiation
“Achondritic” Objects
Planets Aggregation
FragmentationChondrite
Achondrite Iron
Meteoroids
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Carbon 14 Nitrogen 14
electron
neutrino
Aluminum-26 System Proton Neutron
Half-Life = 5700 Years
Aluminum-26 Magnesium-26
positron
neutrino
Half-Life = 700,000 Years
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Magnesium-24Aluminum-27
Magnesium-26Aluminum-26
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Magnesium-24Aluminum-27
Magnesium-26Aluminum-26
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Magnesium-24Aluminum-27
Magnesium-26Aluminum-26
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Magnesium-24 Aluminum-27Magnesium-26
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Aluminum-26 Dating
Aluminum-27 Magnesium-26 Magnesium-24
Mineral 1
Mineral 2
Today
Aluminum-26
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Aluminum-26 Dating
Aluminum-27 Magnesium-26 Magnesium-24
Mineral 1
Mineral 2
Mineral 1
Mineral 2
Today
Originally
Aluminum-26
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Aluminum-26 Isochron Plot
Aluminum-27/ Magnesium-24
Mag
nes
ium
-26/
Mag
nes
ium
-24
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Aluminum-26 Isochron Plot
Aluminum-27/ Magnesium-24
Mag
nes
ium
-26/
Mag
nes
ium
-24
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Aluminum-26 Isochron Plot
Aluminum-27/ Magnesium-24
Mag
nes
ium
-26/
Mag
nes
ium
-24
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Aluminum-27/ Magnesium-24
Mag
nes
ium
-26/
Mag
nes
ium
-24
From Hutcheon 1982 in Nuclear and Chemical Dating Techniques
More Aluminum-26
Aluminum-26
AchondriteChondrule
Relative Dating from Aluminum-26
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Aluminum-27/ Magnesium-24
Mag
nes
ium
-26/
Mag
nes
ium
-24
From Hutcheon 1982 in Nuclear and Chemical Dating Techniques
Aluminum-26
AchondriteChondruleCAI
Relative Dating from Aluminum-26
More Aluminum-26
Chondrule
Calcium-Aluminum-Rich Inclusion
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Aluminum-27/ Magnesium-24
Mag
nes
ium
-26/
Mag
nes
ium
-24
From Hutcheon 1982 in Nuclear and Chemical Dating Techniques
0 5 10 15-5-10 Millions of Years
Aluminum-26
AchondriteChondruleCAI
Relative Dating from Aluminum-26
Chondrule
Calcium-Aluminum-Rich Inclusion
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Uranium-Lead System
Uranium-235
Thorium-231
Protactinium-231
Actinium-227
Thorium-227
Radium-223
Radon-219
Polonium-215
Lead-211
Bismuth-211
Polonium-211
Thallium-207
Lead-207
Uranium-238
Thorium-234
Protactinium-234
Uranium-234
Thorium-230
Radium-226
Radon-222
Polonium-218
Lead-214
Bismuth-214
Polonium-214
Thallium-210
Lead-210
Bismuth-210
Polonium-210
Lead-206
Half-Life = 700 Million Years Half-Life = 4.5 Billion Years
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Lead 204
Uranium-235
Lead 207Uranium-238
Lead 206
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Lead-Lead Isochron Plot
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QuickTime™ and aGIF decompressor
are needed to see this picture.
Lead-Lead Isochron Plot
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Lead-Lead Isochron Plot
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QuickTime™ and aGIF decompressor
are needed to see this picture.
Lead-Lead Isochron Plot
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Lead-Lead Isochron Plot
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Lead 204/Lead 206
Lea
d 2
07/L
ead
206
From Amelin et al 2002 Science 297 p 1678
4575 4570 4565 4560 4555 4550 Millions of Years
Lead Isochron
Achondrite
Lead-Lead Isochron Dates
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Lea
d 2
07/L
ead
206
4575 4570 4565 4560 4555 4550 Millions of Years
Lead Isochron
Achondrite
ChondrulesCAI
Lead-Lead Isochron Dates
Lead 204/Lead 206
Chondrule
Calcium-Aluminum-Rich Inclusion
From Amelin et al 2002 Science 297 p 1678
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Lead 204/Lead 206
Lea
d 2
07/L
ead
206
4575 4570 4565 4560 4555 4550
0 5 10 15-5-10 Millions of Years
Aluminum-26
Millions of Years
Lead Isochron
Achondrite
ChondrulesCAI
Lead-Lead Isochron Dates
Chondrule
Calcium-Aluminum-Rich Inclusion
From Amelin et al 2002 Science 297 p 1678
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Next time:
Colors, Brightness and the Age of Stars