『Abstract
　Using trace element ratios with a common reference to a refractory element, we have shown that carbonaceous chondrites define a straight line in every diagram including the semi-volatile and volatile elements with the relative position of CI, CM, CO and CV always following the same order. We show that bulk Earth values estimated only by terrestrial consideration, using Mg/Al for the refractories or K/U, Rb/Sr for the volatiles, plot on the carbonaceous chondrite line but not within the group of ordinary chondrites. The position on the carbonaceous chondrite line varies according to volatility. Highly refractory elements are close to CI, moderate refractories close to CM and volatiles away from CV. Such systematics permit the calculation of the bulk composition of the Earth for every element. Those observations are in agreement with a condensation temperature of the Earth ranging from 11 to 1200 K.

Keywords: Chemical ratios; Chemical composition; Geochemistry; Earth; Volatile elements; Solar system; Condensation』

1. Introduction
2. The bulk Earth plots on the carbonaceous chondrite correlation line in various chemical diagrams
　2.1. Let us first define the ‘carbonaceous chondrite correlation line’
　2.2. The Earth composition in the refractory diagrams
　2.3. The volatile/refractory diagrams
　2.4. The carbonaceous chondrites cosmothermometer and its limitations by the adsorption phenomenon
3. Chemical composition of the Earth
　3.1. The method of calculation
　3.2. The problem of halogens, the question of adsorption and the computation for HVs
　3.3. The rare gases, nitrogen and carbon
　3.4. B and Be contents

『

Table 4 Bulk composition of the Earth

元素名	組成	±	単位	元素名	組成	±	単位
He	6.19	0.05	×10-13	Ru	1173	20	ppb
Li	2.30	0.5	ppm	Rh	230	10	ppb
Be	46	5	ppb	Pd	883	20	ppb
Be	258	30	ppb	Ag	45.8	5	ppb
C	1700		ppm(up to 3900 ppm)	Cd	182	10	ppb
N	1.27	1	ppm	In	9.42	1	ppb
O	32.436	0.010	％	Sn	394	30	ppb
F	5.12	0.5	ppm	Sb	40	5	ppb
Ne	1.085	0.005	×10-11	Te	313	30	ppb
Na	0.187	0.015	％	I	40.5	15	ppb
Mg	15.8	0.1	％	Xe	3.38	0.1	×10-13
Al	1.507	0.010	％	Cs	41.2	10	ppb
Si	17.1	0.2	％	Ba	4.08	0.5	ppm
P	690	10	ppm	La	415	10	ppb
S	0.46	0.15	％	Ce	1088	20	ppb
Cl	10	5	ppm	Pr	165	5	ppb
Ar（36Ar＝）	3.85	0.05	×10-11	Nd	814	10	ppb
K	171	5	ppm	Sm	259	3	ppb
Ca	1.62	0.02	％	Eu	97.9	3	ppb
Sc	10.1	2	ppm	Gd	348	8	ppb
Ti	764	20	ppm	Tb	66.6	5	ppb
V	93	5	ppm	Dy	424	10	ppb
Cr	4240	200	ppm	Ho	95.6	5	ppb
Mn	1390	100	ppm	Er	278	15	ppb
Fe	28.8	0.4	％	Tm	42.1	2	ppb
Co	804	50	ppm	Yb	278	10	ppb
Ni	1.69	0.03	％	Lu	42.5	2	ppb
Cu	64.7	5	ppm	Hf	199	4	ppb
Zn	24	2	ppm	Ta	27.9	2	ppb
Ga	3.13	0.5	ppm	W	172	5	ppb
Ge	7.30	1	ppm	Re	62.5	3	ppb
As	1.06	0.1	ppm	Os	820	30	ppb
Se	2.52	0.5	ppm	Iｒ	766	30	ppb
Br	400	150	ppb	Pt	1562	40	ppb
Kr	2.82	0.05	×10-12	Au	102	20	ppb
Rb	0.6	0.05	ppm	Hg
Sr	13.7	0.4	ppm	Tｌ	4	2	ppb
Y	2.4	0.2		Pba	0.696	0.1	ppm
Zr	6.79	0.1	ppm	Bi	16	4	ppb
Nb	471	10	ppb	Th	51	3	ppb
Mo	1664	40	ppb	U	14.4	0.3	ppb
aUnradiogenic lead.

』

　3.5. Final adjustments: the example of K/U and the concentration of K
　3.6. The question of silicon and sulfur in the core
　3.7. Some important consequences for isotope geochemistry
　　3.7.1. The U/Pb case
　　3.7.2. The Lu/Hf case
　　3.7.3. The Mn/Cr case
　　3.7.4. The Hf/W case
　3.8. The chemical pattern of the Earth
　3.9. Some comments about the formation of the Earth and early solar system processes
Acknowledgements
References