Lecture_7_Timing1

Lecture_7_Timing1 - Meteorite review from last week C a r b...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 1 Meteorite review from last week • Carbonaceous chondrite : – Representative of dust in cloud from which solar system formed – Except for very volatile elements, has same composition as the sun • Ordinary chondrite : – What you get when you heat up a carbonaceous chondrite. – Missing some volatile elements – Representative of dust in inner solar system when earth formed. – Close to composition of whole earth. • Stony, iron, combination meteorites : – What you get when you melt (and separate) a chondrite 2 Carbonaceous chondrites provide sample early solar system “dust”
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 3 4 Ordinary Chondrite more representative of whole earth composition 94 Whole Earth 92 Ordinary Chondrite 78 Carbonaceous Chondrite % of mass that is in the form of Fe metal or oxides of Fe,Mg,Si
Background image of page 2
3 5 Volatile Retention: A measure of a planet’s retention of volatiles can be obtained from the K:U ratio K is more volatile than U Volcanic rocks suggest that K:U ratio observed at surface reflects that of interior of planet The earth is more depleted in volitiles than chondrites. Like for the achondrites, the raw material has been modified by heating 6 There are 73 Ca atoms for every 1,000 silicon atoms in the sun. Ca is a moderately volatile element. How many Ca atoms are there for every 1000 silicon atoms in an ordinary chondrite? 1. 73 2. 0 3. 80 4. 49
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 7 There are 73 Ca atoms for every 1,000 silicon atoms in the sun. Ca is a moderately volatile element. How many Ca atoms are there for every 1000 silicon atoms in the earth? 1. 73 2. 0 3. 80 4. 49 8
Background image of page 4
5 9 H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar Fe 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05 1.00E+06 1.00E+07 1.00E+08 1.00E+09 1.00E+10 1.00E+11 1.00E+12 0 10 20 30 K Ca Largely lost (volitile forms only)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 17

Lecture_7_Timing1 - Meteorite review from last week C a r b...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online