Genesis Web Science Document I: Element by Element Summary

DOCUMENT I

GENESIS ELEMENT BY ELEMENT SUMMARY

Element	Analytical Technique (a)	Material	Area (cm²)	Comment
Li	SIMS,	Au, diamond	8	Li diffuses fast in Si. Note (c)
Be	SIMS,	Si, diamond	14	(c)
B	SIMS,	Si, diamond	18	(c)
C	GSMS	Si, Au	46
N	GSMS	diamond, Si	180	(c)
O	GSMS	diamond	80	Contingency for concentrator target.
F	SIMS	Si, diamond	4	(c)
Ne	GSMS	Al,,AlOS	4
Na	SIMS	diamond, Au	4	Na diffuses fast in Si. Note (d)
Mg	TIMS, SIMS	Si	100
Al	SIMS,	Si	4
Si	GSMS,SIMS	Au, diamond	100
P	SIMS	Au, diamond, Si	4
S	GSMS; SIMS	Si, diamond	150
Cl	SIMS	Si	13	(d)
Ar	GSMS	Al, AlOS	4
K	TIMS, SIMS	Si, diamond, Au	168	(b, d)
Ca	TIMS	Si	125
Sc	RNAA	Si	4
Ti	TIMS, SIMS,	Si	150	note (b)
V	SIMS	Si	4	(b)
Cr	TIMS, SIMS	Si	150	(b)
Mn	SIMS,	Si	4
Fe	SIMS	Au. diamond	9
Co	RNAA	Si	4
Ni	RNAA	Si	100
Cu	SIMS	Si	17	(b,d))
Zn	RNAA, SIMS	Si	13	(b,d)
Ga	RNAA	Si	100
Ge	RNAA, SIMS	Si	11
As	RNAA	Si	10
Se	RNAA, SIMS	Si	9	(b)
Br	RNAA	Si	10
Kr	GSMS	Al, AlOS	6
Rb	RNAA, SIMS	Si, Au	20	(b)
Sr	SIMS	Si, Au	4
Y	SIMS	Si, Au	4
Zr	SIMS	Si, Au	4
Nb	RIMS	Si	4
Mo	RNAA	Si	100
Ru	RNAA	Si	100
Rh	RIMS	Si	4
Pd	RIMS	Si	4
Ag	RNAA	Si	100	(d)
Cd	RIMS	Si	4
In	RIMS	Si	4
Sn	RIMS	Si	4
Sb	RNAA	Si	100
Te	RNAA	Si	100
I	RIMS	Si	4
Xe	GSMS	Al. AlOS	7
Cs	RNAA	Si	10
Ba	TIMS, RNAA	Si	250	(d)
La	RNAA	Si	100
Ce	RNAA	Si	100
Pr	RIMS	Si	4
Nd	RNAA	Si	100
Sm	RNAA	Si	100
Eu	RNAA	Si	100
Gd	RIMS	Si	13
Tb	RNAA	Si	100
Dy	RIMS	Si	13
Ho	RNAA	Si	100
Er	RIMS	Si	13
Tm	RNAA	Si	100
Yb	RNAA	Si	100
Lu	RIMS	Si	8
Hf	RNAA	Si	100
Ta	RIMS	Si	7
W	RIMS	Si	6
Re	RIMS	Si	9
Os	RIMS	Si	4
Ir	RNAA	Si	4
Pt	RIMS	Si	4
Au	RNAA	Si	10
Hg	RIMS	Si	8
Tl	RIMS	Si	4
Pb	RIMS	Si	13	(d)
Bi	RIMS	Si	12
Th	RIMS	Si	13
U	RIMS	Si	28

(a) SIMS = secondary ion mass spectrometry

GSMS = gas source mass spectrometry

TIMS = thermal ionization mass spectrometry

RNAA = radiochemical neutron activation analysis.

RIMS = resonance ionization mass spectrometry

RIMS is only listed when it is the only available method of analysis. In principle, all elements except noble gases and F can be analyzed with RIMS. Other techniques are baselined when possible because RIMS is a lesser developed technique at present and because the precision for isotopic analysis is less for RIMS than for TIMS or SIMS, all other factors being equal.

Required precision is 10% for elemental abundances and 1% for isotopic abundances except: C (0.4%), and O (0.1%), Mg, Ca, Ti, Cr, and Ba (0.1% for isotopes with relative abundance greater than 1%).

(b) In this analysis Ge is a superior collector material for SIMS analysis and will be used if sufficiently pure material can be identified in Phase B.

(c) If necessary, diamond from concentrator target can be used for these elements. This is likely to be necessary for B, as it is a ubiquitous terrestrial contaminant.

(d) Care required because of significant sources of surface contamination.

Area Summary (cm²)

Total area = 4008

Si area = 3175

Diamond area = 512

Au area = 221

Al/AlOS area = 100

Available BSW array area = 4732

Fraction used = 0.85.

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